6.07 g of sulfur must react to produce 9.30 L of sulfur dioxide at 740 mm Hg and 125°C.
The given conditions of the reaction can be used to find the number of moles of sulfur dioxide using the ideal gas law, PV = nRT, where P = 740 mmHg, V = 9.30 L, T = 125 + 273 = 398 K, and R = 0.0821 L atm/mol K.
First, we need to convert pressure to atm. 1 atm = 760 mmHg, therefore, P = 740 mmHg/760 mmHg/atm = 0.974 atm
Using the ideal gas law, we have:
0.974 atm × 9.30 L = n × 0.0821 L atm/mol K × 398 K
n = 0.377 mol
The balanced equation for the reaction is:
S + 2O2 → 2SO2
For every 2 moles of SO2 produced, 1 mole of sulfur is required. Therefore, the moles of sulfur required to produce 0.377 mol of SO2 is 0.377/2 = 0.1885 mol.
The molar mass of sulfur is 32.07 g/mol, so the mass of sulfur required is:
0.1885 mol × 32.07 g/mol = 6.07 g
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Mole to gram conversion
Write down the solution plan for problems in which the given quantity is expected in moles and unknown quality is expected in grams
Explanation:
Identify the substance: Determine the identity of the substance that is being measured in moles.
Determine the molar mass: Look up the molar mass of the substance in a periodic table or a reference book. The molar mass is expressed in grams per mole.
Set up the conversion factor: Use the molar mass to set up a conversion factor. The conversion factor is a ratio that relates the number of moles to the number of grams.
Example: If the molar mass of the substance is 50 g/mol, the conversion factor would be:
1 mol / 50 g
This means that one mole of the substance is equal to 50 grams.
Apply the conversion factor: Multiply the given quantity, expressed in moles, by the conversion factor. The moles unit will cancel out, leaving the unknown quantity in grams.
Example: If the given quantity is 2 moles of the substance, the calculation would be:
2 mol x (1 mol / 50 g) = 0.04 g
Therefore, the unknown quantity is 0.04 grams.
Check the units: Always double-check that the units of the final answer are correct. In this case, the units should be in grams
Phosphorus reacts with oxygen to form diphosphorus 4P(s)+5O2(g)⟶2P2O5(s) How many grams of P2O5 are formed when 7.65 g of phosphorus reacts with excess oxygen? Show the unit analysis used for the calculation by placing the correct components into the unit-factor slots.
17.51 g of P2O5 is formed when 7.65 g of phosphorus reacts with excess oxygen. Unit analysis used for the calculation:
What is unit analysis?Unit analysis or dimensional analysis is a mathematical method to convert one unit to another unit. It is based on the idea of multiplying by a conversion factor, which is a fraction in which the same quantity is expressed in two different units.
Balanced equation: 4P(s)+5O2(g)⟶2P2O5(s)
Molar mass of P = 30.97 g/mol
Molar mass of P2O5 = 141.94 g/mol
Number of moles of P = given mass / molar mass
Number of moles of P = 7.65 g / 30.97 g/mol
Number of moles of P = 0.24674 mol
Number of moles of P2O5 = (number of moles of P) / (4 mol of P produces 2 mol of P2O5)
Number of moles of P2O5 = 0.24674 mol / 2Number of moles of P2O5 = 0.12337 mol
Mass of P2O5 = number of moles of P2O5 × molar mass of P2O5
Mass of P2O5 = 0.12337 mol × 141.94 g/mol
Mass of P2O5 = 17.51
Thus, 17.51 g of P2O5 is formed when 7.65 g of phosphorus reacts with excess oxygen.
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suppose a .14 m aqueous solution of oxalic acid () is prepared. calculate the equilibrium molarity of . you'll find information on the properties of oxalic acid in the aleks data resource.
The equilibrium molarity of H+ ions in the given solution of oxalic acid is 0.316 M.
Oxalic acid is a diprotic acid, which means that it can donate two hydrogen ions (H+) to a solution. The chemical formula of oxalic acid is H2C2O4. Given that a 0.14 m aqueous solution of oxalic acid (H2C2O4) is prepared, we need to calculate the equilibrium molarity of H+ ions. We can use the ionization reaction of oxalic acid to determine the concentration of H+ ions in solution.
H2C2O4(aq) → 2 H+(aq) + C2O42-(aq)
The equilibrium constant expression for this reaction is given by:
K = [H+]^2 [C2O42-] / [H2C2O4]
Since oxalic acid is a weak acid, we can assume that the concentration of oxalate ions (C2O42-) is negligible compared to the initial concentration of oxalic acid. Therefore, we can simplify the expression as follows:
K = [H+]² / [H2C2O4]
We can also express the concentration of oxalic acid in terms of H+ ions using the dissociation constant (Ka) for the first ionization step of oxalic acid:
H2C2O4(aq) + H2O(l) ⇌ H3O+(aq) + HC2O4-(aq)
Ka = [H3O+][HC2O4-] / [H2C2O4]
Since we are dealing with a dilute solution, we can assume that the concentration of water is constant and cancel it out from the equation. We can also assume that the concentration of HC2O4- ions is negligible compared to the concentration of H2C2O4. Therefore, we can simplify the expression as follows:
Ka = [H3O+]² / [H2C2O4]
Rearranging the equation, we get:
[H3O+] = √(Ka [H2C2O4])
Substituting the given values, we get:
[H3O+] = √(5.9 × 10^-2 × 0.14)
[H3O+] = 0.316 M
Therefore, the equilibrium molarity of H+ ions in the given solution of oxalic acid is 0.316 M.
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What is the molarity of a solution made by mixing 112. 3 g Mg(OH)2 with enough water to make 1. 2 L?
We must first determine how many moles of Mg(OH)2 are in the solution in order to determine its molarity:
Compute Mg(OH)2's molar mass:
mol Mg = 24.31 g
O = 15.99 g/mol
H = 1.01 g/mol
Mg(OH)2 has a molar mass of 24.31 plus 2(15.99) plus 2(1.01), or 58.33 g/mol.
Determine how many moles of Mg(OH)2 there are:
Mass / molar mass = number of moles
1.925 moles are obtained by multiplying 112.3 g by 58.33 g/mol.
Determine the solution's molarity:
Molarity is equal to the moles of solute per litre of solution.
Molarity = 1.925 moles/1.2 litres = 1.60 M
As a result, the molarity of the solution created by combining 1.2 L of water with 112.3 g of Mg(OH)2 is 1.60 M.
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For a 1. 00 m ( 100 cm) crumble zone, how much deformation do you think is needed in order to keep the passenger the safest? Explain
For maximum passenger safety, a crumple zone must deform by at least 12 to 18 inches (30 to 45 centimetres).
A crumple zone is a part of a vehicle designed to absorb the energy of an impact during a collision, thus reducing the impact on the passengers. The amount of deformation required in a crumple zone depends on various factors such as the speed of the vehicle, the mass of the vehicle, and the angle of the impact.
In general, a deformation of at least 12 to 18 inches (30 to 45 cm) is needed in a crumple zone to keep the passengers the safest. This level of deformation helps to slow down the vehicle's momentum and absorb the kinetic energy generated during a collision. The deformation of the crumple zone helps to extend the time of the impact, which in turn reduces the impact force on the passengers.
However, the specific amount of deformation required for a crumple zone can vary depending on the design of the vehicle and the safety standards set by regulatory bodies. Car manufacturers use crash tests to evaluate the effectiveness of their crumple zones and make improvements accordingly.
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The student decides to determine the molarity of the same Na2CO3 solution using a second method. When Na2CO3 is dissolved in water, CO3 ^2−(aq) hydrolyzes to form HCO3 ^−(aq), as shown by the following equation.CO3 2−(aq) + H2O(l) HCO3 −(aq) + OH−(aq) Kb = [HCO3^ -][OH^- ]/ [CO3^2- ] - - - = 2.1 × 10^−4explain how the student could use the measured value in part (f)(i) to calculate the initial concentration of co3-2 (aq). (do not do any numerical calculations.)
To calculate the initial concentration of CO32- (aq), the student can use the measured value from part (f)
(i) to calculate the equilibrium concentration of HCO3- (aq) and OH- (aq)
according to the equilibrium expression: Kb = [HCO3-]eq [OH-]eq / [CO32-]eq.
The student can then use the equilibrium concentrations to calculate the initial concentration of CO32- (aq) by solving the equilibrium expression for [CO32-]eq.
The initial concentration of CO32- (aq) is equal to the sum of the equilibrium concentrations of HCO3- (aq) and OH- (aq).
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Water is cooled from 95°C to 75°C how much heat is released from this 80 g sample
The amount of heat released by the 80 g sample of water is approximately 6694.4 J.
Steps
To calculate the amount of heat released by the 80 g sample of water, we can use the specific heat capacity of water and the formula:
Q = m * c * ΔT
where Q is the amount of heat released, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature.
The specific heat capacity of water is 4.184 J/g°C.
The change in temperature is:
ΔT = 95°C - 75°C = 20°C
Substituting the given values, we have:
Q = 80 g * 4.184 J/g°C * 20°C = 6694.4 J
Therefore, the amount of heat released by the 80 g sample of water is approximately 6694.4 J.
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the enthalpy of formation (ΔHf°) of nitrogen dioxide gas, NO2, is 33.8 kJ/mol. Which equation below correctly represents the chemical equation associated with this enthalpy of formation?
N2(g) + 2O2(g) → 2NO2(g)
N(g) + O2(g) → NO2(g)
N(g) + 2O(g) → NO2(g)
N2(g) + O2(g) → NO2(g)
½ N2(g) + O2(g) → NO2(g)
The correct equation that correctly represents the chemical equation associated with the enthalpy of the formation of nitrogen dioxide gas is "½ N2(g) + O2(g) → NO2(g)".
Nitrogen dioxide is a chemical compound with the chemical formula NO2. It is a gas with a sharp, biting odor and is a prominent air pollutant. It is one of the principal oxides of nitrogen.
The enthalpy of formation (ΔHf°) of nitrogen dioxide gas, NO2, is 33.8 kJ/mol. Enthalpy of formation is defined as the amount of energy liberated or absorbed when a compound is formed from its constituent elements under standard conditions.
Here, ½ N2(g) + O2(g) → NO2(g) is the equation that correctly represents the chemical equation associated with this enthalpy of formation. The energy absorbed or released in the formation of one mole of nitrogen dioxide from 1/2 mole of nitrogen gas and one mole of oxygen gas is 33.8 kJ/mol.
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What are 3 subatomic particles briefly describe how they are arranged?
The protons, neutrons, and electrons are the three subatomic particles. Although electrons orbit the nucleus in various energy levels or shells, protons and neutrons are found inside the nucleus.
The three essential subatomic particles that make up an atom are protons, neutrons, and electrons. The neutral neutrons, which have no charge, and protons, which have a positive charge, are both present in the nucleus. The atomic number and identity of an element are determined by the quantity of protons in an atom. Although being negatively charged, electrons circle the nucleus in various energy levels or shells. An atom's chemical characteristics and behaviour are determined by its electron configuration. While the protons and neutrons in the nucleus contribute to the atomic mass, the electrons in the outermost shell are engaged in chemical processes. Studying the characteristics of matter requires an understanding of how these subatomic particles are arranged.
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A 250.0-mL flask contains 0.2500 g of a volatile oxide of nitrogen. The pressure in the flask is 760.0 mmHg at 17.00°C.
As the molar mass calculated is 24.90 g/mol, hence the gas is most likely to be NO.
What is molar mass?The ratio between mass and the amount of substance of any sample is called molar mass.
To determine whether the gas is NO, NO2, or N2O5, we need to calculate the molar mass of the gas and compare it to the molar masses of these three possible gases.
n = PV/RT
Given, P = 760.0 mmHg, V = 250.0 mL = 0.2500 L, T = 17.00°C + 273.15 = 290.15 K, and R = 0.08206 L atm/mol K.
So, n = (760.0 mmHg)(0.2500 L)/(0.08206 L atm/mol K)(290.15 K) = 0.01003 mol
M = m/n
Given m = 0.2500 g.
M = 0.2500 g/0.01003 mol = 24.90 g/mol
Comparing this molar mass to the molar masses of NO (30.01 g/mol), NO2 (46.01 g/mol), and N2O5 (108.01 g/mol), we see that the gas is most likely NO.
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Note: The question given on the portal is incomplete. Here is the complete question.
Question: A 250.0-mL flask contains 0.2500 g of a volatile oxide of nitrogen. The pressure in the flask is 760.0 mmHg at 17.00°C. Is the gas NO, NO2, or N2O5?
Ian noticed that during a reaction the beaker containing his reactants got very cold. What kind of reaction is this?
Answer: Endothermic Reaction
Explanation:
It is Endothermic Reaction because, during Endothermic reaction, heat is absorbed from the surrounding. It is cold because, due to the reaction, the heat is absorbed, lowering the temperature of the mixture in the beaker, making the reactants cold.
Review these definitions, and make sure to not get confused between Exothermic and Endothermic reactions.
Exothermic Reaction: A chemical reaction where energy is released.
Endothermic Reaction: A chemical reaction where energy is absorbed from the environment.
write a balanced chemical equation for the standard formation reaction of solid vanadium(v) oxide v2o5.
The standard formation reaction of solid vanadium(V) oxide V2O5 is represented by the balanced chemical equation:
2V (s) + 5O2 (g) → 2V2O5 (s)
The standard formation reaction is the process in which one mole of a compound is formed from its constituent elements in their standard state at standard conditions of temperature and pressure. Solid vanadium(V) oxide V2O5 is an inorganic compound that is used as a catalyst in various industrial processes such as the production of sulfuric acid, ceramics, and glass. It is formed from the reaction of vanadium metal and oxygen gas at high temperatures. Standard state refers to the physical state of an element or compound under standard conditions of temperature and pressure (STP). The standard state of a substance can be solid, liquid, or gas. At STP, the standard pressure is 1 atmosphere (atm) and the standard temperature is 25°C.
Complete question is as:
Write a balanced chemical equation for the standard formation reaction of solid vanadium(v) oxide v2o5.with no stoichiometric numbers in the answer.
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Suppose you are studying the kinetics of the reaction between the peroxydisulfate ion and iodide ion. You perform the reaction multiple times with different starting concentrations and measure the initial rate for each, resulting in this table. Experiment [3,0,21(M) (11(M) Initial Rate (M/s) 0.27 0.38 2.05 2 0.40 0.38 3.06 0.40 0.22 1.76 1 3 Based on the data, choose the correct exponents to complete the rate law. rate=k(5,0 21001-10 as
Given data,
Experiment [I] [S2O8] Initial Rate (M/s) 3 0.21 0.27 0.38 2.05 2 0.40 0.38 3.06 0.40 0.22 1.76 1 3We are given with the initial rate of reaction and concentration of iodide ion (I) and peroxy disulfate ion (S2O8). We have to determine the rate law expression for the reaction.
Based on the data, we can write the rate law expression,
rate = k [I]^n [S2O8]^m
The order of the reaction for each reactant can be determined by comparing the change in initial rate when the concentration of each reactant is changed. For example, when the concentration of [I] is increased from 0.21 M to 0.40 M, the initial rate of reaction increases from 0.27 M/s to 2.05 M/s;
therefore, we can write:
[I] order = (log(2.05 M/s) - log(0.27 M/s)) / (log(0.40 M) - log(0.21 M))= 1Similarly, the order of reaction with respect to S2O8 is:[S2O8] order = (log(2.05 M/s) - log(0.27 M/s)) / (log(2.0 M) - log(0.21 M))= 1
The overall order of the reaction is the sum of the individual order of each reactant:n + m = 1 + 1 = 2
Thus, the rate law expression for the given reaction rate = k [I]^1 [S2O8]^1 = k [I] [S2O8]
rate = k[I] [S2O8]
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Identify the compounds that should rearrange following the same mechanism as the pinacol rearrangement?
The pinacol rearrangement is a well-known organic reaction that involves the rearrangement of vicinal diols, which are compounds that have two hydroxyl groups (-OH) attached to adjacent carbon atoms.
The reaction typically occurs under acidic conditions and results in the formation of ketones or aldehydes.
The mechanism of the pinacol rearrangement begins with protonation of one of the hydroxyl groups, usually the more acidic one, by an acid catalyst.
This protonation leads to the formation of a carbocation intermediate, which is a carbon atom with a positive charge due to the loss of a proton.
The adjacent hydroxyl group then attacks the carbocation, forming a carbon-oxygen bond and leading to the formation of a cyclic intermediate.
This cyclic intermediate is unstable and rearranges through migration of the alkyl group or hydrogen atom from the carbocation to the adjacent carbon atom, forming a new carbocation intermediate.
This rearrangement is typically facilitated by the presence of neighboring electron-withdrawing or electron-donating groups that stabilize the intermediate carbocation through resonance or inductive effects.
The rearranged carbocation intermediate is then deprotonated, leading to the formation of a ketone or an aldehyde, depending on the conditions and the specific structure of the starting compound.
The final product of the pinacol rearrangement is typically a ketone or an aldehyde with a carbonyl group (C=O) in the position where the original hydroxyl group was attached.
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Classify each substance as a strong acid, strong base, weak acid, or weak base. Drag the appropriate items to their respective bins NH3 HCOOH KOH CSOH CH3NH2 HF (CH3)2NH HI CH COOH HCIO Strong acids:Weak acids: Strong bases:Weak bases:
The given substances are listed as follows strong acids as HCIO, HI; weak acids as [tex]CH_3COOH[/tex], [tex]CH_3NH_2[/tex], HCOOH, HF; strong bases as KOH, CSOH and weak bases as [tex]NH_3(CH_3)_2NH[/tex].
Substances are classified into four types strong acids, weak acids, strong bases, and weak bases.
Strong acids: Strong acids are acidic substances that have high ionization capacity. These acids are said to be strong acids because they have a pH of less than 7.0. HCl, [tex]H_2SO_4[/tex], and [tex]HNO_3[/tex] are examples of strong acids.Weak acids: Weak acids are acidic substances that have a low ionization capacity. These acids are said to be weak acids because they have a pH of greater than 7.0. [tex]CH_3COOH, CH_3NH_2,[/tex] HCOOH and HF are examples of weak acids.Strong bases: Strong bases are basic substances that have a high degree of ionization capacity. These bases are said to be strong bases because they have a pH of greater than 7.0. NaOH, KOH, and [tex]Ca(OH)_2[/tex] are examples of strong bases.Weak bases: Weak bases are basic substances that have a low degree of ionization capacity. These bases are said to be weak bases because they have a pH of less than 7.0. [tex]NH_3[/tex] and [tex](CH_3)_2NH[/tex] are examples of weak bases.Learn more about strong acids: https://brainly.com/question/30900251
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When the following two solutions are mixed:
K2CO3(aq)+Fe(NO3)3(aq)
the mixture contains the ions listed below. Sort these species into spectator ions and ions that react.
Drag the appropriate items to their respective bins.
NO3-)aq), Fe3+ , CO3 2-, K+
Part B
What is the correct net ionic equation, including all coefficients, charges, and phases, for the following set of reactants? Assume that the contribution of protons from H2SO4 is near 100 %.
Ba(OH)2(aq)+H2SO4(aq)?
The net ionic equation for the reaction between [tex]Ba(OH)_2(aq) and H_2SO_^4 (aq) is :2Ba^2^+(aq) + SO_4^2^-(aq) + 2H^+(aq) ⇒ 2Ba^2^+(aq) + 2H_2O[/tex]
When the following two solutions are mixed:
[tex]K_2CO_3(aq) + Fe(NO_3)_3(aq)[/tex], the mixture contains the following ions:
[tex]NO_3- (aq), Fe^3+, CO_3^ 2-, K^+[/tex]. The spectator ions are NO3- (aq) and K+, and the ions that react are Fe3+ and CO3 2-.
Hence , The correct net ionic equation, including all coefficients, charges, and phases, for the reactants [tex]Ba(OH)_2(aq) + H_2SO_4(aq) [/tex] is 2Ba^2^+(aq) + SO_4^2^-(aq) + 2H^+(aq) ⇒ 2Ba^2^+(aq) + 2H_2O[/tex] .
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4. C2 JAN 08 Q10c
In groundwater, trichloroethene is slowly hydrolysed to produce compound A, which
contains a carboxylic acid group, -COOH.
(1) Describe a test, including reagent(s) and expected observation(s), which could
be used to confirm that compound A contains a carboxylic acid functional
group.
[2]
5. C2 JAN 06 Q5
State which one of the following is the most soluble in water.
A Hexan-1-o
B 2-Methylbutane
C Propene
D Propanoic acid
E
[1]
Answer:
1. To confirm the presence of a carboxylic acid functional group in compound A, a test could be performed using sodium bicarbonate (NaHCO3) or sodium hydroxide (NaOH) solution. When a carboxylic acid is mixed with sodium bicarbonate or sodium hydroxide, it will react to produce carbon dioxide gas, which can be observed as effervescence (bubbling) or fizzing. Alternatively, a pH test strip could be used to test the acidity of the solution, as carboxylic acids are acidic and will lower the pH of the solution.
2. The most soluble in water among the given choices is D, propanoic acid. Propanoic acid is a carboxylic acid, and carboxylic acids are generally soluble in water due to their ability to form hydrogen bonds with water molecules. The other choices (A, B, C, and E) are nonpolar compounds and are generally insoluble in water.
(please could you kindly mark my answer as brainliest)
The molecular formula of aspartame, the artificial sweetener marketed as NutraSweet, is C14H18N2O5. A. What is the molar mass of aspartame? b. How many moles of aspartame are present in 1. 00 mg of aspartame? c. How many molecules of aspartame are present in 1. 00 mg of aspartame? d. How many hydrogen atoms are present in 1. 00 mg of aspartame?
For the molecular formula of aspartame, the artificial sweetener marketed as NutraSweet, is [tex]C_{14}H_{18}N_2O_5[/tex],
a. the molar mass of aspartame is 294.30 g/mol.
b. there are 3.40 x [tex]10^{-6}[/tex] moles of aspartame in 1.00 mg of aspartame.
c. there are 2.05 x [tex]10^{18}[/tex] molecules of aspartame in 1.00 mg of aspartame.
d. the total number of hydrogen atoms in 1.00 mg of aspartame is 34 hydrogen atoms.
a. The molar mass of aspartame can be calculated by adding up the atomic masses of all its atoms:
Molar mass of aspartame = (14 x 12.01 g/mol) + (18 x 1.01 g/mol) + (2 x 14.01 g/mol) + (5 x 16.00 g/mol) = 294.30 g/mol
Therefore, the molar mass of aspartame is 294.30 g/mol.
b. The number of moles of aspartame present in 1.00 mg of aspartame can be calculated using the formula:
moles = mass/molar mass
moles = 1.00 mg / 294.30 g/mol = 3.40 x 10^-6 mol
Therefore, there are 3.40 x 10^-6 moles of aspartame in 1.00 mg of aspartame.
c. The number of molecules of aspartame present in 1.00 mg of aspartame can be calculated using Avogadro's number:
number of molecules = moles x Avogadro's number
number of molecules = 3.40 x [tex]10^{-6}[/tex] mol x 6.02 x [tex]10^{23}[/tex] molecules/mol = 2.05 x [tex]10^{18}[/tex] molecules
Therefore, there are 2.05 x 10^18 molecules of aspartame in 1.00 mg of aspartame.
d. The number of hydrogen atoms present in 1.00 mg of aspartame can be calculated as follows:
There are 14 carbon atoms in 1.00 mg of aspartame, and each carbon atom is bonded to two hydrogen atoms. Therefore, there are 28 hydrogen atoms bonded to carbon atoms.
There are 2 nitrogen atoms in 1.00 mg of aspartame, and each nitrogen atom is bonded to three hydrogen atoms. Therefore, there are 6 hydrogen atoms bonded to nitrogen atoms.
There are 5 oxygen atoms in 1.00 mg of aspartame, and each oxygen atom is not bonded to any hydrogen atoms.
Therefore, the total number of hydrogen atoms in 1.00 mg of aspartame is 28 + 6 + 0 = 34 hydrogen atoms.
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Which set correctly orders the atoms from HIGHEST to LOWEST ionization energy?
Answer:
Option D
Explanation:
Ionization energy increases left to right in a period and decreases top to bottom in a groups.
Ar is in Group 13
S is in Group 15
P is in Group 16
Al is in Group 18
They are all in the same period so decide by the group numbers if left is the highest (group 18) and right (group 13) is the lowest.
The order: Ar, S, P, Al
Hope this is clear. Good luck with chemistry! :)
Identify each of the following statements as describing a chlorination reaction or a bromination reaction. Only ONE can be used for each.
A. Propagation step requires more engery.
B. enthalphy of the reaction is endothermic
C. halogenation yields more than one major product
D. carbon-halogen bond dissociation energy is higher
E. the enthalpy of the reaction is exothermic
F. the halogenation is selective
Answer : A. Propagation step requires more energy : Chlorination reaction, B. Enthalpy of the reaction is endothermic : Bromination reaction, C. Halogenation yields more than one major product : Chlorination reaction, D) Carbon-halogen bond dissociation energy is higher : Bromination reaction, E. The enthalpy of the reaction is exothermic : Bromination reaction, F. The halogenation is selective : Chlorination reaction
Propagation step requires more energy - This statement is describing a chlorination reaction because in a chlorination reaction, the propagation step (adding a chlorine atom to the reactant) requires more energy than the initiation step. B. Enthalpy of the reaction is endothermic - This statement is describing a bromination reaction because in a bromination reaction, the reaction enthalpy is endothermic.
This statement is describing a chlorination reaction. This statement is describing a bromination reaction because in a bromination reaction, the carbon-halogen bond dissociation energy is higher than in a chlorination reaction. This statement is describing a bromination reaction because in a bromination reaction, the reaction enthalpy is exothermic.
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how many chirality centers are there in a 2-ketohexose?
The correct answer is that a 2-ketohexose has three chirality centers, one at each of the carbon atoms numbered 3, 4, and 5.
A 2-ketohexose is a six-carbon sugar with a ketone functional group at the second carbon atom. In general, a chirality center, also known as a stereocenter, is an atom in a molecule that is bonded to four different substituents, resulting in two or more non-superimposable mirror image structures. For a six-carbon sugar, there are typically four chirality centers, one at each of the carbon atoms numbered 2, 3, 4, and 5. However, in a 2-ketohexose, the ketone functional group at carbon 2 eliminates the chirality center at that carbon, resulting in only three chirality centers at carbon atoms 3, 4, and 5. Therefore, a 2-ketohexose has three chirality centers, one at each of the carbon atoms numbered 3, 4, and 5.
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Which of the following types of equations will include spectator ions?
A. molecular equation
B. full ionic equation
C. net ionic equation
B only
A and B
A and C
B and C
the chemoautotroph thiobacillus can obtain energy from the oxidation of arsenic (as^3 -----> as^5 )
The chemoautotroph thiobacillus can obtain energy from the oxidation of arsenic (As3 → As5) by oxidizing arsenic.
A chemoautotroph obtains energy from chemical compounds, including inorganic molecules like iron, sulfur, and nitrogen, rather than light energy like autotrophs or heterotrophs. They are capable of synthesizing their organic molecules from carbon dioxide.CO2 through the process of chemosynthesis, which uses energy from the oxidations of inorganic compounds. These organisms are found in various ecosystems, such as deep-sea vents, sulfur-rich hot springs, and underground oil reserves.
Thiobacillus is one such chemotroph that uses various sulfur-containing compounds as its energy source. They also oxidize arsenic and obtain energy by oxidizing it from As3 to As5. It is accomplished using a chain of enzymes that carry out the oxidation process.
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what volume of at 18m stock solution of sulfuric acid do you need to make 0.50 l of a 0.20 m dilution? how much water do you need to dissolve the aliquot of your stock acid into to make your solution?
The amount of 18M stock solution of sulfuric acid required to make 0.50 L of a 0.20 M dilution solution is about 0.4944L.
What volume of an 18M stock solution required to prepare solution?To make 0.50 L of a 0.20 M dilution, you need to figure out how many moles of sulfuric acid you'll require, then figure out how much of the 18 M stock solution contains that many moles of sulfuric acid. In the end, the volume of the solution can be calculated.
To calculate the number of moles required: n = MV = 0.50 × 0.20 = 0.10 mol
To determine the volume required:
V₁ = n₁/V₂
V₁ = (0.10 mol)/(18 M)
V₁ = 0.0056 L or 5.6 mL (using the unit conversion factor 1 L = 1000 mL)
Thus, 5.6 mL of 18 M stock sulfuric acid will be required to make a 0.50 L solution with a 0.20 M concentration. To prepare a 0.20 M solution, it is required to dilute the sulfuric acid aliquot with water. The volume of the water required is equal to the total volume minus the amount of stock solution that you'll use. As a result, the volume of water required is:
Vwater = Vtotal - Vstock
Vwater = 0.50 L - 0.0056 L
Vwater = 0.4944 L
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NEED ASAP PLEASE HELP ITS DUE TMRW:How many orbiting telescopes does NASA have and what are their names? WILL GIVE 5 STARS AND THANKS -20 PTS
There are over 90 orbiting telescopes, but I will name the major ones:
Hubble Space Telescope
Chandra X-ray Observatory
Spitzer Space Telescope
Herschel Space Observatory
Planck Observatory
Kepler Mission
Fermi Gamma-ray Space Telescope
Swift Gamma Ray Burst Explorer
GALEX
Solar & Heliospheric Observatory
STEREO
Which of the following are the best examples of foods within the protein group that can also increase intake of unsaturated fats? a. Organic 0% fat Greek Yogurt, All Natural raisins, Apples b. Lean chicken, skim milk, sugar-free sodac. Salmon, nuts, seeds, legumes d. Steak, bacon, pepperoni pizza
The best examples of foods within the protein group that can also increase intake of unsaturated fats are salmon, nuts, seeds, legumes. The correct option is (c).
Protein is a vital macro nutrient that is required to build and repair tissues, produce enzymes and hormones, and maintain healthy muscles and bones. Unhealthy fats can increase the risk of heart disease, stroke, and other chronic health problems. A diet that contains a good balance of carbohydrates, protein, and healthy fats is recommended for overall health and well-being. Unsaturated fats are a type of healthy fat that can improve heart health by reducing bad cholesterol levels and increasing good cholesterol levels.
Foods that are high in protein and unsaturated fats are ideal for promoting overall health and wellness. Salmon is a good source of protein and contains omega-3 fatty acids, which are a type of unsaturated fat that can reduce inflammation and improve brain function. Nuts and seeds are high in protein and also contain healthy fats that can help reduce the risk of heart disease and other chronic health problems. Legumes, such as lentils, beans, and chickpeas, are high in protein and fiber and also contain healthy fats that can help improve heart health.In conclusion, salmon, nuts, seeds, and legumes are the best examples of foods within the protein group that can also increase intake of unsaturated fats.
Therefore, Salmon, nuts, seeds, and legumes are the best examples of protein-rich meals that can also enhance unsaturated fat intake. The right option is (c).
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A student is given the equation N₂ + H₂ → NH3
2NH₂-
to balance. She answers with N₂ + 2H₂
Explain why her answer is not correct. Balance
the equation correctly.
The student's answer N₂ + 2H₂ is not correct because it doesn't balance the charges of the reactants and products. The reactants have no charge, but the product NH3 has a negative charge of 2-.
What are reactants ?In a chemical reaction, reactants are the starting materials that undergo a chemical change or reaction to produce one or more new substances called products. The reactants are written on the left-hand side of the chemical equation, while the products are written on the right-hand side. For example, in the reaction between hydrogen gas (H2) and oxygen gas (O2) to form water (H2O), the reactants are H2 and O2, and the product is H2O. The balanced chemical equation for this reaction is:
2H2 + O2 → 2H2O
In this equation, two molecules of hydrogen react with one molecule of oxygen to produce two molecules of water.
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. describe how to prepare 15 ml of a 0.25 m cacl2 solution using deionized water and cacl2 salt. the molecular weight of cacl2 is 110.98 g/mol. show your work. (recall: m
To prepare 15 ml of a 0.25 M CaCl₂ solution using deionized water and CaCl₂ salt, the following steps must be followed.
1. Calculate the amount of CaCl₂ salt needed:
Moles = Molarity * Volume (L)
Moles = 0.25M x 0.015L = 0.003750 moles
Mass of CaCl₂ salt = 0.003750 x 110.98 g/mol = 0.41637 g
2. Measure out 0.41637 g of CaCl₂ salt and add it to a clean beaker.
3. Measure out 15 ml of deionized water and add it to the beaker with the CaCl₂ salt.
4. Stir the mixture until the CaCl₂ salt has fully dissolved.
5. The solution is now ready to use.
It is important to remember to use caution when handling and measuring the chemicals and to always wear safety goggles and gloves when working with chemicals.
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H2(g) + Cl2(g) --> HCl(g) Consider the unbalanced equation above. 3.70L of H2 and 3.05L of Cl2 are reacted under the same conditions of temperature and pressure. How many liters of HCl will be produced?
H2(g) + Cl2(g) --> HCl(g) Consider the unbalanced equation above. 3.70 L of H2 and 3.05 L of Cl2 are reacted under the same conditions of temperature and pressure. How many liters of HCl will be produced?
Solution: From the balanced chemical equation, we can see that 1 mol of H2 reacts with 1 mol of Cl2 to produce 2 moles of HCl. We are given the volume of both reactants, but the equation is not balanced. Therefore, let's balance the chemical equation:H2(g) + Cl2(g) → 2HCl(g)Balancing the above chemical equation shows that 1 mole of H2 reacts with 1 mole of Cl2 to produce 2 moles of HCl. At STP (Standard Temperature and Pressure), 1 mole of any gas occupies a volume of 22.4 L.3.70 L of H2 is: (3.70L / 22.4 L/mol) = 0.1652 mol H2.3.05 L of Cl2 is: (3.05L / 22.4 L/mol) = 0.1362 mol Cl2Since both the reactants are limiting, therefore the Cl2 is the limiting reactant because it has less amount than H2. So we use Cl2 to calculate the amount of product formed. According to the balanced chemical equation, 1 mol of Cl2 produces 2 moles of HCl.
Therefore,0.1362 mol Cl2 (2 mol HCl / 1 mol Cl2) = 0.2724 mol HCl The volume of HCl at STP is: (0.2724 mol HCl) (22.4 L/mol) = 6.1 L. Therefore, the volume of HCl produced when 3.70 L of H2 and 3.05 L of Cl2 are reacted under the same conditions of temperature and pressure is 6.1 liters.
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Which of the compounds listed below, when added to water, is/are likely to increase the solubility of AgCl? A. Ammonia, B. NH3 Sodium cyanide, C. NaCN Potassium chloride,
D. KCl
AgCl is more likely to dissolve in water when ammonia (NH3) is present. This is due to the fact that ammonia and AgCl may combine to create the water-soluble complex ion, Ag(NH3)2+.
How well does AgCl dissolve in NH3 H2O?At 25°C, the solubility of AgCl in water is 0.0020 g of AgCl per litre of H2OS.
AgCl dissolves in NH3 at a rate of 14.00 g per kilogramme of NH3 when the temperature is 25°C. Due to the production of the soluble stable complex [AgNH32]+, AgCl is more soluble in NH3. Since oxygen is more electronegative than nitrogen, ammonia is less polar than water.
In water or acid, is AgCl soluble?AgCl is well known to be insoluble in water whereas NaCl and KCl are soluble in the pedagogical literature: implementations of Elementary studies of both qualitative and quantitative analysis make this distinction.
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