Approximately 71.1 grams of sucrose would be hydrolyzed when 2.60 L of a 0.160 M sucrose solution is allowed to react for 200 minutes, assuming the reaction follows first-order kinetics.
To calculate the mass of sucrose hydrolyzed, we need to first determine the amount of sucrose (in moles) present in the solution, using the formula:
moles of sucrose = concentration of sucrose x volume of solution
moles of sucrose = 0.160 mol/L x 2.60 L = 0.416 mol
Since sucrose (C12H22O11) is hydrolyzed into glucose (C6H12O6) and fructose (C6H12O6), we know that one mole of sucrose yields two moles of product. Therefore, the number of moles of product formed will be twice the number of moles of sucrose hydrolyzed.
mol of sucrose hydrolyzed = 0.416 mol / 2 = 0.208 mol
Finally, we can use the molar mass of sucrose (342.3 g/mol) to calculate the mass of sucrose hydrolyzed:
mass of sucrose hydrolyzed = 0.208 mol x 342.3 g/mol = 71.1 g
Therefore, approximately 71.1 grams of sucrose would be hydrolyzed when 2.60 L of a 0.160 M sucrose solution is allowed to react for 200 minutes, assuming the reaction follows first-order kinetics.
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How many moles are in 2.91 x 10 ^22 atoms of He?
0.048moles are in 2.91 x 10²² atoms of He. Helium (He) is a chemical element and inert gas in Periodic Group 18 (noble gases).
What is helium?Helium is a chemical element and inert gas in Periodic Group 18 (noble gases). Helium, the second smallest atom is a colorless, odorless, but tasteless gas that solidifies at 268.9 °C (452 °F).
Helium has lower boiling as well as freezing points than any other known material. Helium is the sole element that is not solidified by adequate cooling at normal pressure; it must be consolidated at a pressure of 25 earth's atmosphere at such a temperature of about one K
mole = given number of atoms/ 6.022×10²³
= 2.91 ×10²² / 6.022×10²³
= 0.048moles
Therefore, 0.048moles are in 2.91 x 10²² atoms of He.
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If we put 100 particles of heavy species of gas into a container and the pressure is 12
atmospheres, predict the new pressure of putting a total of 300 particles of this gas
into the container.
A - 12 atm
B- 36 atm
C- 24 atm
The new pressure of the particles of heavy species of gas is 36 atm.
The correct option is B
What is the new pressure of the gas?The new pressure of the particles of heavy species of gas is determined using the ideal gas equation as follows:
PV = nRT
where;
P is the pressureV is the volume n is the number of particlesR is the molar gas constantT is the temperature
Assuming the temperature, volume, and molar gas constant all remain unchanged, the new equation will be:
P = n
When n = 100, P = 12 atm
Ratio of n and P = 100/12
When, n = 300, P = 300 * 12/100
Pressure = 36 atm
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A hot tub is filled with 450 gallons of water and is heated to 105 °F. If the hot tub heater provides 5900 kJ/min, how long, in minutes will it take to heat the water in the hot tub from 62 °F to 105 °F?
The amount of heat required to raise the temperature of the system through 1°C is defined as the heat capacity of the system. The time in minutes to heat the water in the hot tub from 62 °F to 105 °F is 28.9.
What is specific heat capacity?The quantity of heat required to raise the temperature of one gram of the substance through 1°C is known as the specific heat capacity. It is usually denoted by c.
The equation connecting the specific heat capacity with the heat is given as:
q = mc (T₂ - T₁) = mc Δ T
1 gallons = 3.785 L
450 gallons = 450 × 3.785 = 1703.25 L
Density of water is 1 g/cm³
Then the mass of water is, m = Density × Volume
m = 1703.25 L × 1000 mL/ 1L × 1.0 g / 1mL × 1kg / 1000g
m = 1703 .25 kg
The temperature in °F can be converted into °C as:
T°C = T°F - 32 / 1.8
T₁ = 62 -32 / 1.8 = 17°C
T₂ = 105 - 32/ 1.8 = 41°C
Δ T = T₂ - T₁ = 41 - 17 = 24°C
q = 1703.25 kg × 4.184 kJ/kg K × 24°C
q = 171033.552 kJ
Here power in watt (W) = 5900 kJ/min
Then time, t = q/W = 171033.552 kJ/ 5900 kJ/ min
t = 28.9 min
Thus the time is 28.9 min.
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15.0 grams of calcium chloride, CaCl2, is dissolved into 100.0 mL of water at 22.5°C, the final temperature of the solution was 32.2°C. After the dissolution took place, consider the water and what had happened to:a) Temperature?b) Average kinetic energy?c) Average speed?d) Was the dissolution reaction endothermic or exothermic?
A. temperature will increase because reaction is exothermic.
B. Average kinetic energy will increase.
C. Average speed will increase.
D. The dissolution reaction is exothermic.
Dissolution reaction is defined as the reaction where a single reactant breaks down into it's ions making an aqueous solution. If 15.0 grams of calcium chloride, CaCl2, is dissolved into 100.0 mL of water at 22.5°C, the final temperature of the solution was 32.2°C then the dissolution of CaCl2 in water is an example of exothermic reaction because heat is evolved during the process hence there is an increase in temperature is observed. An exothermic reaction is defined as a chemical reaction in which less energy is needed to break bonds in the reactants than is released when new bonds form in the products.
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Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 7.50 g of sodium carbonate is mixed with one containing 5.00 g of silver nitrate. How many grams of each of the following compounds are present after the reaction is complete?
sodium carbonate
g
silver nitrate
g
silver carbonate
g
sodium nitrate
g
The term mole concept is used here to determine the masses of the respective compounds. The mass of sodium carbonate is 5.935 g , silver nitrate is 0 g, silver carbonate is 4.057g, sodium nitrate is 2.496 g.
What is mole concept?One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:
Number of moles (n) = Given mass / Molar mass
Here the mass of sodium carbonate is 7.50 g and its molar mass (M) is 105.988 g/mol. The mass of silver nitrate is 5.00 g and its molar mass 169.87 g/mol.
'n' of Na₂CO₃ = 7.50 / 105.988 = 0.0707 mole
'n' of AgNO₃ = 5.00 / 169.87 = 0.0294 mole
The equation for the given reaction is:
Na₂CO₃ + 2AgNO₃ → Ag₂CO₃↓ + 2NaNO₃
Here 1 mole Na₂CO₃ - 2 mole AgNO₃
x mole Na₂CO₃ - 0.0294 mole AgNO₃
x = 0.0147 mole
n (Na₂CO₃) = 0.0707-0.0147 = 0.056 mole
m (Na₂CO₃) = n × M = 0.056 × 105.988 = 5.935 g
n (AgNO₃ ) = n (NaNO₃) = 0.0294 mole
m (NaNO₃) = n × M = 0.0294 × 84.9 = 2.496 g
n (Ag₂CO₃) = 0.0147 mole
m (Ag₂CO₃) = n × M = 0.0147 × 276 = 4.057 g
Thus the masses are:
sodium carbonate = 5.935 g, silver nitrate = 0 g, silver carbonate = 4.057g, sodium nitrate = 2.496 g.
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Calculate The Number Of Moles Of Solute In 122.4 L Of 0.990 M Sodium Cyanide. round your answer to significant figures.
The number of moles of solute in 122.4 L of 0.990 M sodium cyanide is 119.082 moles. After rounding to four significant figures, the answer is 119.1 moles.
The number of moles of solute in 122.4 L of 0.990 M sodium cyanide is 119.082 moles. This can be determined by using the equation:
Moles = (Molarity * Volume)Where Molarity is 0.99 M and Volume is 122.4 L.
The molar mass of sodium cyanide (NaCN) is 49.01 g/mol [3], which means that 1 mole of NaCN contains 49.01 grams of the compound. This is important to know when calculating the mass of a given number of moles, as the two are directly related.
Rounding to four significant figures, the answer is 119.1 moles of sodium cyanide in 122.4 L of 0.990 M solution.
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Convert .00612 kg to decigrams.
Identify which compounds below possess a molecular dipole moment and indicate the direction of that dipole moment:
A molecular dipole moment occurs when a molecule has a positive end and a negative end, resulting in an electrically asymmetrical distribution of charge. The direction of the dipole moment is defined as pointing from the negative end to the positive end.
HCl: This compound possesses a molecular dipole moment. The direction of the dipole moment is from the chlorine (Cl) end to the hydrogen (H) end.CO2: This compound does not possess a molecular dipole moment. The carbon and oxygen atoms are arranged symmetrically, resulting in a neutral overall charge distribution.H2O: This compound possesses a molecular dipole moment. The direction of the dipole moment is from the oxygen end to the hydrogen end.NH3: This compound possesses a molecular dipole moment. The direction of the dipole moment is from the nitrogen end to the hydrogen end.In general, a compound will possess a molecular dipole moment if the electronegativity values of the atoms in the molecule are different, leading to an uneven distribution of charge.
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when heating a solution to boiling on a hot plate, start by choose... . then, turn the heat to choose... to start. if necessary, choose... after waiting about ten minutes without seeing boiling.
when we heating a solution to boiling on a hot plate, start by starting and stabilizing the stir function then, turn the heat to a medium heat to start. If necessary, turn up the heat setting after waiting about a ten minutes without seeing the boiling.
A chemical reaction can be defined as a chemical process which typically involves the transformation or the rearrangement of the atomic, ionic or molecular structure of an element through the breakdown and the formation of chemical bonds to produce a new compound or substance.
Some of the laboratory apparatus (equipment) which are used for conducting a chemical reaction are conical flask, beaker, Bunsen burner, crucible, round bottom flask etc.
When heating a solution to boiling on a hot plate, start by starting and to stabilizing the stir function. Then, turn up the heat to a medium heat to start it.
The safety precautions which be taken when heating a solution to boiling on a hot plate: A proper inspection of the round bottom flask for cracks, irregularities or any kind of imperfection.
Be ensure you avoid heating the flask while it is closed.
When we suspending the flask on a hot plate, you should ensure that you use a clamp for the stability.
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given equal masses of each added to 100 ml of water which of the following will produce the largest cahnge in free energy?A. KClB. CaClC. CaD. K
Compounds are more stable than elements, so they have less energy in them. Alkali metals are very reactive and can release a lot of energy when they react with water. So K is the correct answer.
Alkali metals react violently with water to produce alkaline solutions and hydrogen gas. This reaction is exothermic (releasing a certain amount of energy) so that it can produce an explosion and even an explosion (if the amount of potassium metal is greater).
Alkali metals react with water to form bases and hydrogen gas. Reacted rather slowly; Na reacts violently with sparks; K, Rb, and Cs explode when placed in water.
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In a laboratory experiment, a chemist prepared different concentrations of solution with a light absorbing solute and measured the absorbance of each solution. In the absorbance measurements, the solutions were placed in sample holders where light propagates through 5.00 cm of sample. So, the length, I, equals 5.00 cm in all these measurements. The following data is collected:
Concentration: 0, Absorbance : 0: Concentration: 0,102; Abs: 0,0089
Concentration : 0.249 Abs: 0.0205
Concentration: 0.502 Abs: 0.0463
Concentration: 0.748 Abs: 0.0641
Concentration: 1.052 Abs: 0.0903
Concentration: 1.485 Abs: 0.1335
a- Which variable is the independent variable?
b- Which variable is the dependent variable?
c- Using Excel, make a plot of the data with the appropriate variables as x and y. Using the linear regression analysis of the plotting program, determine the best-fit slope and y-intercept of the data. Be sure to include units!
a- The independent variable is the concentration of the solution, b- The dependent variable is the absorbance of the solution.
c- In Excel, the concentration data can be entered in one column and the absorbance data in another column. The concentration data would be plotted on the x-axis and the absorbance data would be plotted on the y-axis. By selecting the option for linear regression b, the best-fit slope and y-intercept can be determined.
For example, if the best-fit slope is 0.2 L/mol and the y-intercept is 0.05, the equation for the best-fit line would be y = 0.2x + 0.05, where y is the absorbance and x is the concentration in mol/L. The units for the slope would be absorbance per concentration (L/mol) and the units for the y-intercept would be absorbance (L). These values represent the relationship between the concentration of the solution and its absorbance, with the slope indicating how absorbance changes with increasing concentration.
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The density of water is 1.00 g/mL. If your swimming pool holds 208,000 gallons of water, what is the weight of the water in a filled swimming pool in tons?
Describing How to Convert Between Moles, Liters, and
Mass
When hot lava reaches seawater, the salts in the
water react with steam to form gaseous
hydrochloric acid. You are given an unbalanced
chemical equation for one such reaction and the
volume of HCI(g) produced. To the right are the
steps to explain how you would find the mass of
solid sea salt needed to produce the given gas
volume. Choose the correct order of the steps by
selecting the correct step number in the drop-
down.
Balance the chemical equation.
Multiply by the molar mass of the salt and convert
moles to mass.
Use the balanced equation to find out how many
moles of the salt are needed to produce the moles
of HCI.
Convert the volume of HCI to mol HCI by dividing
by the molar volume.
DONE
Moles can be converted to liters by the use of the stoichiometry of the reaction and the gas laws.
How can you convert moles to liters?To convert moles to liters, you need to use the Ideal Gas Law. The Ideal Gas Law states that the number of moles of a gas is proportional to its volume at a given temperature and pressure. The equation is:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.
By rearranging the equation, you can find the volume of a gas in liters when the number of moles is known:
V = nRT / P
Since the volume is in liters, the number of moles can be converted to liters by multiplying it by the volume.
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Which of the following reactions will have the largest heat of combustion? The combustion reaction for three C9H20 isomers is shown. In reaction A, the substrate nonane with SMILES string CCCCCCCCC reacts with 14 moles of oxygen 02 to yield 9 moles of carbon dioxide CO2 and 10 moles of water H20. In reaction B, the substrate 2,3-dimethylheptane with SMILES string CC(C)CC)CCCC reacts with 14 moles of oxygen O2 to yield 9 moles of carbon dioxide CO2 and 10 moles of water H20. In reaction C, the substrate 2,3,3,4-tetramethylpentane with SMILES string CC(C)C(C)(C)CC)Creacts with 14 moles of oxygen 02 to yield 9 moles of carbon dioxide CO2 and 10 moles of water H20. O Reaction B O Reaction Reaction A
Reaction B (2,3-dimethylheptane) will have the largest heat of combustion. This is because the larger alkyl group of the 2,3-dimethylheptane (3 methyl groups vs 2 methyl groups in the other two isomers) will require more energy to break, resulting in a higher heat of combustion.
It is also important to note that the larger alkyl group of the 2,3-dimethylheptane means that there will be more carbon-carbon (C-C) and carbon-hydrogen (C-H) bonds to break in order to oxidize the molecule. This means that more energy is required to break these bonds and therefore the heat of combustion will be higher.
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When a metal was exposed to photons at a frequency of 1.40×1015 s−1, electrons were emitted with a maximum kinetic energy of 3.20×10−19 J.
Calculate the work function, Φ, of this metal.
What is the maximum number of electrons that could be ejected from this metal by a burst of photons (at some other frequency) with a total energy of 7.36×10−7 J?
The work function of metal was 6.08 * 10⁻¹⁹ J
The maximum number of electrons ejected are 1.21 * 10¹²electrons
What is the work function of a metal?The work function of a metal is the minimum amount of energy required to remove an electron from an atom of the element.
The work function of metal can be written as: φ = h f - E
where:
φ represents the work function of a metal,
hf represents the photon energy,
E is the kinetic energy.
For the given metal:
Work function = 6.63 * 10⁻³⁴ * 1.40 * 10¹⁵ - 3.20 × 10⁻¹⁹
Work function = 6.08 * 10⁻¹⁹ J
The maximum number of electrons ejected: total energy/work function
The maximum number of electrons ejected = 7.36 * 10⁻⁷/6.08 * 10⁻¹⁹
The maximum number of electrons ejected = 1.21 * 10¹²electrons
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suppose a student conducted the synthesis of an alkyl ether and obtained 270 mg 270 mg of the crude product. the student then used water/ethanol to recrystallize the product. after recrystallization, the mass of the alkyl ether product was 280 mg. What would be a possible explanation for the problem and what would be a suggestion to the student to solve the problem? a. Water was a poor choice for recrystallization. Recrystallize the sample using hexane b. The salicylic acid was not completely dried after the recrystallization. Dry it and reweigh. c. The chemical reaction between the salicylic acid and hot water produced a product with the molar mass greater than that of salicylic acid Dispose of the product and repeat the synthesis d. The synthesis procedure was not followed correctly. Repeat the synthesis this time paying more attention to the details of the procedure.
Option B After recrystallization, the salicylic acid was not completely dried. Reweigh it after it has dried would be a possible explanation for the problem
To address the issue, the student could repeat the recrystallization process with proper care and attention to detail, making sure to measure the mass of the product accurately and to dry the product completely before weighing it.
They could also consider using a different recrystallization solvent or a different technique to purify the product. However, without more information about the specific circumstances, it's difficult to say for sure what the best solution would be.
An alkyl ether is an organic compound that contains an oxygen atom bonded to two carbon atoms, one of which is bonded to an alkyl group. Alkyl groups are chains of carbon atoms that are bonded together and may contain one or more carbon atoms.
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The diagram below shows many of the processes involved in the nitrogen cycle. Which of these processes can be performed by bacteria?
I got the answer to the question just trying to give the right answers to everyone
The conversion of atmospheric nitrogen to ammonium.
The conversion of ammonium to nitrites.
The conversion of nitrates to atmospheric nitrogen.
these are the right answers
The consumption of assimilated nitrogen stored in plant tissue.
this one is the wrong answer
In an ecosystem, all the given options are the processes that can be performed by bacteria.
What is an ecosystem?
Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .
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how many moles are in 120g of Mg(No3)2
First, find the molecular weight of Mg(NO3)2.
The molecular weight of Mg is 24.3 g/mol and the molecular weight of NO3 (nitrate ion) is 62 g/mol.
So, the molecular weight of Mg(NO3)2 is 24.3 + (2 x 62) = 150 g/mol.
Next, we can find the number of moles in 120 g of Mg(NO3)2:
120 g / 150 g/mol = 0.8 mol
So, there are 0.8 moles of Mg(NO3)2 in 120 g.
What is molecular weight?The mass of a mole of a material is its molecular weight. Typically, grams per mole are used as the unit of measurement. In this video, we demonstrate how to determine a substance's molecular weight using the periodic table's listed atomic weights. On a different page, we perform a conversion between the macroscopic scale (represented by grams of a substance) and the microscopic scale using the molecular weight (number of molecules of that substance). The molecular weight of a material is the weight, in atomic mass units, of each atom in a specific formula. One atomic mass unit is equal to one-twelfth of the weight of carbon-12. The most accurate sign is u, while the previous one was amu (a lowercase letter u).
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An iceberg has a volume of 7605 cubic feet.
The density of ice is 0.917 g/cm3 .
1ft=30.48cm
Whats the mass in Kg?
Based on the volume and the density of the iceberg, the mass of the iceberg is 197475.603 kg.
What is the volume of the iceberg in cm³?The volume of the iceberg in cm³ is determined as follows:
1 ft = 30.48 cm
1 ft³= 30.48 cm * 30.48 cm * 30.48 cm
1 ft³= 28316.847 cm³
The volume of the iceberg in cm³ = 7605 * 28316.847 cm³
The volume of the iceberg in cm³ = 215349621.4 cm³
The mass of the iceberg is then determined as follows:
Mass = density * volume
The mass of the iceberg = 215349621.4 cm³ * 0.917 g/m³
The mass of the iceberg = 197475602.9 g 197475.603 kg
The mass of the iceberg = 197475.603 kg
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Which of the following statements correctly reflect Le Chatelier's principle? Select all that apply.A. Changing the volume of the containerAdding an inert gasAdding or removing a reactant or productB. When a system at equilibrium is disturbed, the system reacts to minimize the effect of the disturbance.When a system at equilibrium is disturbed, Q ≠ K.C. A catalyst does not change the value of K.Equilibrium is unaffected.D. Add N2 and H2Remove NH3Decrease the volume
Le Chatelier's principle states that when a system at equilibrium is disturbed, the system will react in such a way as to minimize the effect of the disturbance. For example, if the pressure or temperature of the system is changed, the system may shift to a new equilibrium in order to restore balance. Likewise, if a reactant or product is added/removed, the system may shift again in order to counteract the change.
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The absorbances of a series of solutions containing C were measured at a fixed wavelength and a pathlength of 1.1 cm, and the following data was recorded.
The absorbance of a solution containing C can be calculated using the Beer-Lambert Law, which states that absorbance (A) is equal to the product of the molar absorptivity coefficient (ε), the pathlength (l) of the light through the cuvette, and the concentration (c) of the solution.
Thus, given that the wavelength and pathlength are known, the concentration of the solution can be calculated using the equation A = εlC.
The Beer-Lambert Law is an important equation used in spectroscopy to measure the concentration of a solution based on its absorbance at a certain wavelength. The equation is based on the fact that the amount of light absorbed by a solution is proportional to the concentration of the solution and the pathlength of the light through the sample.
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Rate laws are determined experimentally by varying the concentrations of the reactants and observing the effect on the initial rate.
Concentration and rate data are provided in the table below for the reaction shown.
2NO(g) + Cl2(g) --› 2NOCI(g)
The rate law of the reaction can be obtained from the concentration of the reactants.
What is the rate law?The rate law is an equation that describes the relationship between the rate of a chemical reaction and the concentrations of its reactants. It typically takes the form of rate = k[A]^m[B]^n, where k is the rate constant, [A] and [B] are the concentrations of the reactants, and m and n are the reaction orders with respect to each reactant.
The rate law can be determined experimentally by measuring the rate of the reaction at different concentrations of the reactants.
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One of the hydrates of CoCl2 is cobalt(II) chloride dihydrate .
A 56.2 gram sample of CoCl2 2 H2O was heated thoroughly in a porcelain crucible, until its weight remained constant. After heating, how many grams of the anhydrous compound remained?
Answer:
The molar mass of CoCl2 2H2O is 165.87 g/mol.
This can be calculated by adding the molar masses of each component:
Co: 58.93 g/mol2
Cl: 2 x 35.45 g/mol = 70.90 g/mol
2H2O: 2 x 18.02 g/mol = 36.04 g/mol
To find the mass of the anhydrous compound, we need to subtract the mass of the water that was driven off during heating. The difference in weight between the original sample and the final, heated sample is equal to the weight of the water that was lost.
determine the element symbol, mass number, and charge for an atom or ion that has a 49 neutrons, 38 protons, and 36 electrons. element symbol:
The element symbol, mass number, and charge of this ion would be:
Element symbol: Sr
Mass number: 87
Charge: +2
Given :
Protons = 38
Neutrons = 49
Electrons = 36
Mass number = protons + neutrons
Mass number = 48+49 = 87
In this case, the number of protons is 38 and the number of electrons is 36, so the charge of the ion would be 38 - 36 = +2, meaning that it is a positively charged ion (cation).
Is the mass number the number of protons and neutrons?
The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).
What is the charge of an ion?
An ion is an atom or group of atoms that has an electric charge. Ions with a positive charge are called cations. Ions with a negative charge are called anions. Many normal substances exist in the body as ions.
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which of the following represents a rate law for the overall reaction that is consistent with the proposed mechanism? responses rate Rate= k[H2][ICl]2Rate= k[H2][ICl] Rate= k[H2][HI][ICl]2
The proposed mechanism indicates that the overall reaction is a two-step process. In the first step, H2 reacts with ICl to form HCl and I2. In the second step, HCl and HI react to form H2 and ICl.
Therefore, the rate law for the overall reaction should be expressed as:
Rate= k[H2][HI][ICl]2 where k is the rate constant of the reaction and [H2], [HI], and [ICl] represent the concentrations of the reactants. The rate law indicates that the rate of the overall reaction is directly proportional to the concentration of the three reactants and is proportional to the square of the concentration of ICl. This is because, in the second step, two molecules of ICl are consumed to form H2 and HI.
Therefore, the rate law for the overall reaction is Rate= k[H2][HI][ICl]2, which is consistent with the proposed mechanism.
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How many milligrams are in 850 nanograms?
According to unit conversion, there are 0.00085 miligrams in 850 nanograms .
What is unit conversion?
Unit conversion is defined as a multi-step process which involves multiplication or a division operation by a numerical factor.The process of unit conversion requires selection of appropriate number of significant figures and the rounding off procedure.
It involves a conversion factor which is an expression for expressing the relationship between the two units.A conversion ratio always has value which equals to one which indicates that numerator and denominator have values which are expressed in different units.
As 1 nanogram = 1×10[tex]^-6[/tex] mg , thus, 850 nanograms = 850×10[tex]^-6[/tex]= 0.00085 mg.
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The chemical reaction in which ammonium sulfate and potassium hydroxide are mixed together is called
a) combustion reaction
b) single displacement
c) decomposition
d) double displacement
e) synthesis
The chemical reaction in which ammonium sulfate and potassium hydroxide are mixed together is called double displacement (Option D)
What is double displacement?Double displacement is a type of chemical reaction where two reactants exchange parts to form two new products. For example, when an acid and a base are combined, they produce salt and water. This reaction is known as double displacement because the ions from both reactants have exchanged places. Double displacement reactions typically involve the exchange of ions between aqueous solutions, but can also occur with solid reactants.
The chemical reaction in which ammonium sulfate and potassium hydroxide are mixed together is a double displacement reaction. In this type of reaction, the positive and negative ions of two ionic compounds switch places to form two new ionic compounds.
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Tell how many protons, neutrons, and electrons 1H35Cl
contains.
There are 18 electrons in total for the compound HCl. The compound contains 18 protons also. The total number of neutrons is 18 as well.
What is HCl?Hydrogen chloride is a covalent compound formed by the sharing of electrons between hydrogen atom and Cl atom. Hydrogen is 1st element in periodic table and Cl is the 17th element.
Hydrogen contains only one electron and chlorine contain 17 electrons. Among the 17 electrons 7 are valence electrons in Cl. The number of protons in them is equal to the number of electrons.
H has no neutrons and Cl have 18 neutrons. The total number of electrons is then 1+ 17 = 18 this jus the number of protons also. Hence the compound HCl contains 18 of electrons, protons and neutrons as well.
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The following set of molecules each show a singlet. The chemical shifts (ppm) are 0.232, 3.052, 5.297 and 7.256. Match the shift to each molecule below CH2Cl_2 CHCl3 CH3Cl CH4
In nuclear magnetic resonance (NMR) spectroscopy, the chemical shift is the resonant frequency of an atomic nucleus relative to a trendy in a magnetic field.
Often the placement and range of chemical shifts are diagnostic of the shape of a molecule. The chemical shift in absolute phrases is described via way of means of the frequency of the resonance expressed close to a trendy compound that is described to be at zero ppm. The scale is made greater workable via way of means of expressing it in elements in keeping with million (ppm) and is indepedent of the spectrometer frequency.
1) electronegativity of atoms increases chemical shift value also increases.
2) number of electronegative atoms increases chemical shift value is also more
3) CH4 has no Cl atoms . so it has least chemical shift
4) CHCl3 has 3 higher electronegative atoms . so it has higher chemical shift.
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which of the following compounds has the greatest number of constitutional isomers? hexane butane propane octane
The compound that has the greatest number of constitutional isomers is octane (C₈H₁₈).
Constitutional isomers are different compounds with the same molecular formula, but with different arrangements of atoms in the molecule.
Molecules with fewer carbon atoms have fewer opportunities for different arrangements, resulting in fewer constitutional isomers.
Hexane, with molecular formula C₆H₁₄, has a total of 5 constitutional isomers.
Butane, with molecular formula C₄H₁₀, has 2 constitutional isomers.
Propane, with molecular formula C₃H₈, has only 1 constitutional isomer.
Octane, with molecular formula C₈H₁₈, has 9 constitutional isomers.
Hence, octane, having 9 constitutional isomers, is the compound with the greatest number of constitutional isomers.
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