The boiling point of a substance depends on the intermolecular forces of attraction between its molecules. Generally, the stronger the intermolecular forces, the higher the boiling point.
For each pair of compounds listed, the one with the higher boiling point is:
Ne (neon) and Ar (argon): Ar has a higher boiling point.CH₄ (methane) and CH₃CH₃ (ethylene): CH₃CH₃ has a higher boiling point.CH₃CH₃ (ethylene) and CH₂=CH₂ (ethene): CH₃CH₃ (ethylene) has a higher boiling point.GeCl₄ (germanium tetrachloride) and SnCl₄ (tin tetrachloride): SnCl₄ (tin tetrachloride) has a higher boiling point.Learn more about a compound boiling point here: https://brainly.com/question/14058698
#SPJ4
Which of the following is/are logical assumption(s) that can be derived from analysis of this pathway alone? In other words, disregard any side-pathways that may or may not stem from these two steps.Choose one or more:A. Ineffective argininosuccinase activity will cause a cellular accumulation of arginine.B. Ineffective argininosuccinate synthetase activity will cause a cellular accumulation of fumarate.C. Ineffective argininosuccinate synthetase activity will cause a cellular accumulation of citrulline.D. Ineffective argininosuccinase activity will cause a cellular accumulation of argininosuccinate.
The results of research on this particular pathway logically support the following statement: The inefficient activity of argininosuccinase causes cellular argininosuccinate to accumulate.
The enzymes argininosuccinase synthetase and argininosuccinase control the urea cycle, a metabolic process that helps the body get rid of excess nitrogen. Cells build up argininosuccinate because dormant argininosuccinase activity prevents the final step in the conversion of argininosuccinate to arginine and fumarate.
The urea cycle breaks down waste nitrogen into urea, which the body excretes. The enzymes argininosuccinate synthetase and argininosuccinase are necessary for this cycle. There is an accumulation of argininosuccinate inside the cell because argininosuccinase is unable to convert it to arginine and fumarate.
Learn more about argininosuccinate:
https://brainly.com/question/29870174
#SPJ4
Hydrogen bonds account for which of the following observation?
01:05.
Hydrogen naturally exists as a diatomic molecule.
Hydrogen is easily combustible with oxygen. Spon
Water molecules are bent or "V-shaped".
Air is more dense than hydrogen gas.
For its molar mass, water has a high boiling point.
QAFAraGhe
A.
B.
C.
D.
E.
de slo zuibstedT
..
E) Water's high boiling temperature and molar mass are accounted for by hydrogen bonding.
What three different intermolecular forces of attraction are there?The London dispersion force, the dipole-dipole interaction, and the ion-dipole interaction are the three main categories of intermolecular forces.
What do the forces of attraction between molecules mean?A force that attracts the protons or positive parts of one molecule to the electrons or negative parts of another molecule is known as an intermolecular force. A substance's various physical and chemical properties are influenced by this force.
The forces that attract opposing positive and negative charges when two interacting molecules come into contact are known as intermolecular forces of attraction, or IMFA. These include the London dispersion force, hydrogen bonding, dipole-dipole, and ion-dipole forces.
To learn more about intermolecular forces of attraction here:
https://brainly.com/question/10941007
#SPJ1
Full Question = Hydrogen bonds account for which of the following observation? a) hydrogen naturally exists as a diatomic molecule b) it is easily combustible with oxygen c) water molecules are bent or "v-shaped" d) air is more dense than hydrogen bonds e) for its molar mass, water has a high boiling point
Answer:
E) Water's high boiling temperature and molar mass are accounted for by hydrogen bonding.
do both members of the following pairs have the same number of protons? neutrons? electrons? (a) 3 h 1 and 3 he 2 (b) 14 c 6 and 15 n 7
For ³₁H and ³₂He, Protons are NOT equal, Electrons are not equal, Neutrons are not equal and for ¹⁴₇N and ¹⁵₇N, Protons are Not equal, Electrons are Not equal, Neutrons are equal.
Atomic isotopes are frequently represented by the nuclear symbol. Isotopes are different versions of an element's atoms. In comparison to other atom types, isotopes contain a varied number of neutrons.
Three components make up the nuclear symbol: the element's symbol, the atomic number, and the mass number. The usual notation for an element's nuclear symbol is anX, where an is the element's mass number and n (or frequently z) is the atomic number.
The total number of protons and neutrons in the atom's nucleus is represented by the mass number, or a.
The quantity of protons in an atom's nucleus, or "atomic number," is known.The amount of neutrons in the isotope determines the difference between the mass number and the atomic number.
The hyphen notation is another symbol used to signify isotopes. The element's name, a hyphen, and the isotope's mass number are used in this notation. For instance, the isotope 126C can alternatively be written as carbon - 12 when employing the hyphen notation.
Learn more about Neutrons here:
https://brainly.com/question/5084702
#SPJ4
calculate the mass in g of agarose required to make 200 ml of a 1.2% agarose gel. record the answer to one decimal place
The mass in g of agarose required to make 200 ml of a 1.2% agarose gel is 2.4 g.
Agarose gel is defined as a three-dimensional matrix which is formed from helical agarose molecules in supercoiled bundles that are aggregated into three-dimensional structures with channels and pores through which biomolecules can pass.
Agarose gel electrophoresis is the main use of agarose gel which has proven to be an efficient and effective way of separating nucleic acids.
1.2% refers that 1.2 g of agarose is required to make 100 ml of agarose gel.
So, 200 ml of agarose gel will require 2.4 g of agarose.
Learn more about agarose gel from the link given below.
https://brainly.com/question/5661562
#SPJ4
carboxylic acids are typically prepared using oxidation reactions. which of the functional groups below can be oxidized to give a carboxylic acid product? select all that apply.A) Primary alcohols
B) Phenols
C) Secondary alcohols
D) Alkynes
Primary alcohols and alkynes can be oxidized to give carboxylic acid products.
Addition of an oxidizing agent such as potassium permanganate (KMnO4) to acidic, alkaline, or neutral media shows the oxidation of primary alcohols to carboxylic acids. Aldehydes can be converted to carboxylic acids by using mild oxidizing agents. Oxidation of primary alcohols is a common method for the synthesis of carboxylic acids.
RCH2OH → RCOOH. This requires strong oxidants, most commonly chromic acid (H2CrO4), potassium permanganate (KMnO4), and nitric acid (HNO3). Primary alcohols and aldehydes are typically oxidized to carboxylic acids with potassium dichromate(VI) solution in the presence of dilute sulfuric acid.
Learn more about oxidizing
brainly.com/question/29458295
#SPJ4
Predict the major organic product when trans-1-chloro-2-methylcyclohexane is heated with concentrated sodium ethoxide [dissolved in ethanol/dimethyl sulfoxide (DMSO) as the solvent]. Cl
+CH 3
CH 2
−OΘ /Na
( in EtOH/DMSO
3.0MCH 3
CH 2
ONa/Δ
Oc D. E.
The major organic product when trans-1-chloro-2-methylcyclohexane is heated with concentrated sodium ethoxide in ethanol/dimethyl sulfoxide (DMSO) as the solvent is expected to be 2-methylcyclohexanol.
This reaction is a nucleophilic substitution reaction where the sodium ethoxide acts as a nucleophile and attacks the chlorine atom, replacing it with an ethoxide ion and forming an intermediate alkoxide. The intermediate alkoxide can then undergo an elimination reaction, leading to the formation of the alcohol product. The reaction is expected to occur with Markovnikov's rule, meaning that the hydrogen from the alkoxide will add to the less substituted carbon in the intermediate, leading to the formation of 2-methylcyclohexanol. the major organic product when trans-1-chloro-2-methylcyclohexane is heated with concentrated sodium ethoxide [dissolved in ethanol/dimethyl sulfoxide (DMSO) as the solvent]. Cl
Learn more about 2-methylcyclohexanol. here:
https://brainly.com/question/28921179
#SPJ4
May you show your work on the Balancing Chemical Equations ^USA TESTPREP ....PLEASE!
Gaseous ammonia chemically reacts with oxygen (O₂) gas to produce nitrogen monoxide gas and water vapor. Calculate the moles of water produced by the
reaction of 0.095 mol of oxygen. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits
Answer:
The balanced chemical equation for the reaction between gaseous ammonia and oxygen gas is:
4NH3 + 5O2 -> 4NO + 6H2O
From this equation, we can see that for every 4 moles of ammonia, 6 moles of water are produced. Thus, with 0.095 moles of oxygen, we can calculate the number of moles of water produced using the stoichiometric ratio of the reactants:
0.095 moles of O2 x (6 moles H2O/5 moles O2) = 0.114 moles H2O
Therefore, 0.114 moles of water are produced by the reaction of 0.095 moles of oxygen.
A homogenous mixture varies from a heterogenous mixture in that a homogenous mixture has properties that:A) do not vary in the mixtureB) vary in the mixtureC) suspend in a liquidD) dissolve a solute
A homogenous mixture varies from a heterogenous mixture in that a homogenous mixture has properties that do not vary in the mixture. The correct answer is A.
A homogeneous mixture is a mixture in which the properties and composition are uniform throughout the mixture. This means that if you took a sample from any part of the mixture, you would find the same properties and composition in that sample as you would find in the entire mixture.
In contrast, a heterogeneous mixture is a mixture in which the properties and composition vary throughout the mixture. For example, a salad is a heterogeneous mixture because you can see different ingredients such as lettuce, tomatoes, and croutons, each with different properties and composition.
So, in a homogeneous mixture, the properties do not vary, while in a heterogeneous mixture, the properties vary throughout the mixture.
Learn more about homogenous mixture here: https://brainly.com/question/1307383
#SPJ4
Select the mechanism(s) where the concentration of the nucleophile has no effect on the reaction rate. SN1 SN2 E1 E2
The mechanisms where the concentration of the nucleophile has no effect on the reaction rate are SN1, SN2, E1, and E2.
SN1 and E1 reactions do not depend on the concentration of the nucleophile, as they use carbocations as intermediates. SN2 and E2 reactions are bimolecular processes, in which the nucleophile and substrate must collide in order for the reaction to occur, so the rate of the reaction depends on the concentration of both the nucleophile and the substrate.
The concentration of the nucleophile is a measure of the amount of nucleophile molecules in a given solution. In a nucleophilic substitution reaction, the nucleophile reacts with the substrate molecule (e.g. an alkyl halide) to form a new covalent bond.
Learn more about the concentration of the nucleophile:
https://brainly.com/question/9528254
#SPJ4
Write the rate laws for the following elementary reactions. (Rate expressions take the general form: rate = k . [H2] . [Cl2].)(a) N2O4(g) ? 2 NO2(g)(b) NO2(g) + SO2(g) ? NO(g) + SO3(g)(c) Cl(g) + ICl(g) ? I(g) + Cl2(g)(d) CH2(g) + Cl2(g) ? CH2Cl2(g)
The rate laws of the following elementary reactions are:
(a) The rate law for the decomposition of N₂O₄ is: Rate = k[N₂O₄].(b) The rate law for the reaction of NO₂ and SO₂ is: Rate = k[NO₂][SO₂]. (c) The rate law for the reaction of Cl and ICl is: Rate = k[Cl][ICl]. (d) The rate law for the reaction of CH₂ and Cl₂ is: Rate = k[CH₂][Cl₂].
The rate of a chemical reaction is a measure of how quickly a reaction occurs. It is usually expressed as the change in concentration of a reactant or product per unit time. The rate of a reaction is affected by a number of factors, including temperature, concentration of the reactants, surface area of the reactants, and the presence of catalysts.
Learn more about elementary reactions:
https://brainly.com/question/14234763
#SPJ4
How many atoms are in 3.25 moles of Na?
Answer:20
Explanation:
One mole of sodium contains 6.02 × 10²³ Na atoms. Therefore, 3.25 moles of sodium contains 1.95 × 10²⁴ Na atoms.
What is one mole ?One mole of a substance is its amount containing 6.02 × 10²³ atoms or molecules. This number is called Avogadro number. One mole of every elements contains Avogadro number of atoms.
Similarly one mole of every compound contains 6.02 × 10²³ molecules. Mass of one mole of an element is called its atomic mass. The mass of one mole of compound is called its molar mass.
No.of atoms in 3.25 moles of Na = 3.25 × 6.02 × 10²³ = 1.95 × 10²⁴
Hence, there will be 1.95 × 10²⁴ Na atoms in 3.25 moles of Na.
Find more on Avogadro number:
brainly.com/question/11907018
#SPJ1
Using the data in the Reagents and Properties table, calculate the theoretical yield of methoxybenzaldehyde in grams, assuming you start with 1.50 g of the alcohol. (Assume the alcohol is the limiting reactant). Be sure to show your work: you will NOT receive credit if work is not shown. You may wish to make a copy of this calculation to assist you with your post-lab questions
The theoretical yield of methoxy benzaldehyde is 1.47 g.
We must determine the quantity of p-methoxybenzyl alcohol consumed in the process in order to compute the theoretical yield of methoxy benzaldehyde.
The amount of methoxy benzaldehyde produced will be equal to the amount of p-methoxybenzyl alcohol consumed in the reaction because it is the limiting reactant.
Because the molar mass of 1.5 g of p-methoxybenzyl alcohol is 138.15 g/mol, its moles can be computed as follows:
moles of p-methoxybenzyl alcohol = 1.5 g / 138.15 g/mol = 0.0108 mol
Methoxy benzaldehyde's theoretical yield can be computed as follows:
Theoretical yield (g) = p-methoxybenzyl alcohol moles × the methoxy benzaldehyde molar mass (g/mol) = 0.0108 mol x 136.15 g/mol, or 1.47 g.
To Learn More About methoxy benzaldehyde click
brainly.com/question/14414155
#SPJ4
Label a data table so that the experimenter can record observations for the sand and water temperatures at various points.
the collum table 5 length x 3 width
science
Answer:
Explanation:
Here is a labeled data table for recording sand and water temperatures at various points:
Point Sand Temperature (°C) Water Temperature (°C)
1
2
3
4
5
The table is 5 columns wide and 3 rows long, with the first column labeled "Point" to indicate the location being observed, and the second and third columns labeled "Sand Temperature (°C)" and "Water Temperature (°C)" respectively to indicate the type of temperature being measured. The cells under the "Sand Temperature (°C)" and "Water Temperature (°C)" columns are left blank to allow the experimenter to record the corresponding temperature readings for each point.
How many electrons in an atom could have these sets of quantum numbers? =4,ℓ=3
14 electrons in an atom could have these sets of quantum numbers ℓ=3. Quantum numbers are eigenvalues of operator
What is quantum numbers?Quantum numbers are used in quantum chemistry and physics to explain the values of state maintains in the dynamic of either a quantum system. Quantum numbers are eigenvalues of operator that commute with Harmonic oscillator that may be known with accuracy while also knowing time as the program's energy as well as eigenspaces.
A description of every one of the quantum numbers of such a quantum system, when combined, completely characterizes the system's basic state and may, in theory, be measured collectively. ,ℓ=3 represents f subshell, which can occupy total 14 electrons.
Therefore, ,ℓ=3 represents f subshell, which can occupy total 14 electrons.
To learn more about quantum numbers, here:
https://brainly.com/question/2193783
#SPJ1
A piece of metal was heated and then
put it into 100.0 mL of water, initially at
23.7 °C. The metal and water were
allowed to come to an equilibrium
temperature, determined to be 27.8 °C.
How much energy did the water absorb?
CH₂0 = 4.18 j/g•C
qH₂0 = [?] J
The energy absorbed by the water is qH₂0 is 1690.8 J.
What is energy?Energy is the capacity to do work or produce heat. It can be found in many different forms, such as chemical, kinetic, gravitational, electrical, nuclear, and thermal energy. Chemical energy is stored in the bonds of atoms and molecules, which can be released through chemical reactions. Kinetic energy is the energy of motion, and is generated by moving objects.
The energy absorbed by the water can be calculated using the equation q = m * c * ∆T, where m is the mass of the water, c is the specific heat capacity of water, and ∆T is the change in temperature.
m = 100.0 mL * (1.00 g/mL) = 100.0 g
c = 4.18 j/g•C
∆T = 27.8 °C - 23.7 °C = 4.1 °C
Therefore, the energy absorbed by the water is qH₂0 = 100.0 g * 4.18 j/g•C * 4.1 °C = 1690.8 J.
To learn more about energy
https://brainly.com/question/874116
#SPJ1
The average mass of an M&M candy is 0.625 g. What is the mass of 12 M&Ms? The answer should
be reported to three (3) significant figures. Why are there no sig figs associated with 12 M&Ms?
Answer:The mass of 12 M&Ms can be calculated by multiplying the average mass of an M&M (0.625 g) by the number of M&Ms (12):
0.625 g * 12 = 7.5 g
The answer should be reported to three significant figures, so it would be 7.5 g.
There are no significant figures associated with 12 M&Ms because it is a whole number and does not have any uncertainty. Significant figures are used to indicate the degree of accuracy or precision of a measurement, and whole numbers are considered to be exact values without any uncertainty.
Explanation:
fill the blank density is--property
a. an extensive.
b. an intensive.
c. a chemical.
d. a chemical.
show the equations you will use to calculate %protein, %phosphate, and %fat in milk
%Protein = (Protein content in Milk / Total Weight of Milk) x 100
%Phosphate = (Phosphate content in Milk / Total Weight of Milk) x 100
%Fat = (Fat content in Milk / Total Weight of Milk) x 100
Define weight?
Weight is a measure of the force of gravity on an object. It is the amount of mass an object has and is usually measured in kilograms (kg) or pounds (lbs). Weight is related to mass, but not the same; mass is the amount of matter in an object, while weight is a measure of the strength of gravity on that object. Weight is a vector quantity, which means it has both magnitude and direction. Weight is an important factor to consider when designing objects and structures, as it affects how much a material can support and the amount of stress it can withstand.
To learn more about weight
Here: https://brainly.com/question/229459
#SPJ1
A bacterium such as Pseudomonas uses nitrate as a final electron acceptor in an electron transport system. All of the statements below are true, EXCEPT?
a. The process require an electron donor
b. The process produces nitrite ion
c. They can respire without O2
d. The process does not yield as much ATP
e. The require light
When pseudomonas uses nitrate as a final electron acceptor in anaerobic respiration. Here the statement which is wrong is they require light. Option e is the correct answer.
Pseudomonas can survive both in aerobic and anaerobic conditions as it is capable of both aerobic and anaerobic respiration. The process require an electron donor. Nitrate ion acts as the donor. Nitrite ions are produced during anaerobic respiration. Nitrate reductase convert nitrates to nitrites.
This process does not require oxygen because nitrate acts as the electron donor. This process yield less ATP compared to aerobic respiration.
So the statement which is not true is option e. They require light.
For more information regarding anaerobic respiration, kindly refer
https://brainly.com/question/12605249
#SPJ4
12. If a gas canister contains 1.45 L of fuel, and the fuel density is 0.710 g/cm³. What is the mass of the fuel contained in the gas canister? (1cm³ = 1mL)
The number of kilograms of fuel that are contained in one canister is 1.03 Kilograms
Given:
mass = density x volume
Density= 0.710 g/cm³
volume = 1.45 L
To ensure consistency, convert 1.45 l into cm³
1.45 L= 1450 cm³
mass = 0.710g/cm³ x 1450 cm³ = 1029.5 grams
convert grams to Kg
(1 kg x 1029.5 grams) /1000 grams = 1.0295 Kg ≅1.03 kg
What is mass volume density?
A material substance's mass per cubic centimetre. D is density, M is mass, and V is volume, and the formula for density is d = M/V. In terms of grammes per cubic centimetre, density is frequently expressed.
Definition of density
It is a material substance's mass expressed as a percentage of its volume. Additionally, density is expressed in terms of kilograms per cubic metres of space. One kilogram per cubic metre is the density of air, for instance.
To know more about density:
https://brainly.com/question/16693125
#SPJ1
When taking a measurement with a pH meter, keep the instrument in the storage solution until it is needed. Rinse the pH meter with deionized water and gently pat dry. Place the meter in the sample solution, and record the measurement when the pH stabilizes.
The ph meter should be settled down, after that only it can able analyse it.
What is ph ?
A determination of how acidic or basic a substance or solution is. Calculating pH involves using a scale from 0 to 14. On this scale, a pH of 7 indicates neutrality, which means it is neither acidic nor basic. More acidic chemicals have pH values below 7, while more basic substances have pH values above 7.
What is temperature ?
Temperature is a unit used to represent how hot or cold something is. It can be stated using the Celsius or Fahrenheit scales, among others. Temperature shows which way heat energy will naturally flow, i.e., from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature).
Therefore, ph meter should be settled down, after that only it can able analyse it.
Learn more about ph from the given link.
https://brainly.com/question/26424076
#SPJ4
A sample of heptane always contains 84% carbon and 16% hydrogen. Which of these best explains this phenomena?a.Law of Constant Composition b.Law of Conservation of Mass c.Dalton's Atomic Theory d.Law of Mass Actione.Lavoisier's Law
The law of definite proportion best explains this phenomenon.
Heptane has been reported to constantly contain 84% carbon and 16% hydrogen. This indicates that heptane will always contain 84% carbon and 16% hydrogen, regardless of where it was produced or how it was produced. This accords with the law of definite proportion, which stipulates that regardless of the compound's origin or the chemical reaction that created it, a given compound will always contain its constituents in an unaltered mass ratio.
The law of definite proportions, commonly referred to as Proust's law or the rule of constant composition, holds that a chemical compound's constituents are always present in a predetermined ratio regardless of the source or method of synthesis (by mass).
The law of definite proportion serves as an example of this.
To know more about atomic theory
https://brainly.com/question/25176189
#SPJ4
Iron has four naturally occuring isotopes: iron-54, iron-56, iron-57, and iron-58. The natural abundance of each of these isotopes
is shown in the table.
Isotope:
iron-54
iron-56
iron-57
iron-58
Natural Abundance (%):
5.80
91.72
2,20
0.28
-
Identify the isotope that is least abundant on Earth.
iron-54
iron-56
iron-57
-
Identify the isotope that is most abundant on Earth.
iron-57
iron-56
iron-58
iron-54
Iron has four naturally occurring isotopes: iron-54, iron-56, iron-57, and iron-58 are mentioned below.
What is isotope ?
The element's isotopes, though they belong to the same family of elements, differ in the number of neutrons they contain. According to the Periodic Table, an element's atomic number is based on how many protons it has.
What is iron ?
Several processes in our bodies require iron. Hemoglobin, a protein formed in part of iron, is one that carries oxygen from the lungs to every cell in the body. It helps our muscles retain and use oxygen. Iron is also found in a wide variety of other proteins and enzymes. Your body needs the recommended dosage of iron.
Least abundance means having least percentage , So iron-58 is 0.28% hence iron-58 is least abundant isotope of iron.
Most abundant means having highest percentage, so iron-56 is 91.72% ,hence most abundant isotope.
Therefore, Iron has four naturally occurring isotopes: iron-54, iron-56, iron-57, and iron-58 are mentioned above.
Learn more about isotope from the given link.
https://brainly.com/question/364529
#SPJ1
Which of these molecules exhibit hydrogen bonding? Select all that apply. a) chloromethane. b) methanol. c) methane
Chloromethane and methanol are both capable of exhibiting hydrogen bonding, while methane does not. The correct answer A and B.
Chloromethane and methanol both contain hydrogen atoms that are covalently bound to a more electronegative atom (chlorine and oxygen, respectively), which creates a partial positive charge on the hydrogen atom. This partial positive charge can interact with a partial negative charge on a nearby molecule, forming a hydrogen bond.
When hydrogen bonding occurs, the hydrogen atom acts as a bridge between two molecules, allowing them to interact and creating a strong bond. The hydrogen bond is formed when the partial positive charge on the hydrogen atom interacts with a partial negative charge on an electronegative atom of a nearby molecule.
Learn more about hydrogen bonding:
https://brainly.com/question/1420470
#SPJ4
these are some events occurring at chemical synapses during paracrine signaling. place them in order:1. opening of ligandgated ion channels2. releasemof neurotransmitter by exocytosis3. opening of voltage gated calcium channels in presynaptic neuron4. binding of neurotransmitter to postsynaptic receptor5. action potential generation in presynaptic neuron
The order of events occurring at chemical synapses during paracrine signaling is as follows:
Action potential generation in presynaptic neuron.Opening of voltage gated calcium channels in presynaptic neuron.Release of neurotransmitter by exocytosis.Binding of neurotransmitter to postsynaptic receptor. Opening of ligand-gated ion channels.A chemical synopsis is an overview of a particular type of chemical reaction, such as a synthesis or a degradation. It describes the reactants, products, and any other relevant information about the reaction, such as the energy required for it to occur and any catalysts that can be used to speed it up.
Learn more about chemical synapses:
https://brainly.com/question/30390678
#SPJ4
Which of the following statements is correct with respect to the photosynthetic pathway of grass or a cactus?
A.
In a cactus, carbon is fixed only during the day.
B.
In grass, carbon is fixed only during the night.
C.
In a cactus, carbon is fixed only during the night.
Answer: A
Explanation:. In a cactus, carbon is fixed only during the day
If you have 0.0102 moles of CaCl2, how many moles of Na2CO3 are necessary to reach stoichiometric quantities. From that calculation, determine how many grams of Na2CO3 are necessary to reach stoichiometric quantities.
If you have 0.0102 moles of CaCl2, how many moles of Na2CO3 are necessary to reach stoichiometric quantities. 1.08g of Na₂CO₃ are necessary to reach stoichiometric quantities.
What is stoichiometry quantity ?The term stoichiometric quantity is defined as the amount of product or reactant specified by the coefficients in a balanced chemical equation.
The balanced chemical reaction is as follows:
CaCl₂ + Na₂CO₃ → 2NaCl + CaCO₃
1 mole of CaCl₂ reacts per mole of Na₂CO₃
For calculate how many moles of CaCl2•2H2O are present in 1.50 g.
To solve this question we must find the moles of CaCl2•2H2O using its molar mass (147.0146g/mol).
These moles = Moles CaCl₂ = Moles of Na₂CO₃ necessaries to reach stoichiometric quantities.
To find then the mass we must use molar mass of Na₂CO₃ (105.99g/mol):
Moles CaCl₂.2H₂O:
1.50g × (1mol / 147.0146g)
= 0.0102 moles CaCl₂.2H₂O
= 0.0102moles CaCl₂
Moles Na₂CO₃:
0.0102 moles Na₂CO₃
Mass Na₂CO₃:
0.0102 moles × (105.99g / mol)
= 1.08g of Na₂CO₃ are present
Thus, 1.08g of Na₂CO₃ are necessary to reach stoichiometric quantities.
To learn more about the stoichiometry quantity, follow the link;
https://brainly.com/question/9743981
#SPJ1
What is a unit for distance?
There are several units for distance, but the most commonly used unit in the International System of Units (SI) is the meter (m). The meter is defined as the distance traveled by light in a vacuum during a time interval of 1/299,792,458 of a second.
What is Distance?
Distance is a measure of the amount of space between two points. It is the length of the path taken by an object or person moving from one point to another, regardless of the direction taken. Distance is a scalar quantity, meaning it has magnitude but not direction.
Distance can be measured using a variety of units, such as meters, kilometers, miles, or feet, depending on the context and the scale of the distance being measured. For example, we might measure the distance between two cities in kilometers, the distance between two buildings in meters, or the distance between two points on a map in miles.
Other units for distance include:
Kilometer (km): 1,000 meters
Centimeter (cm): 1/100th of a meter
Millimeter (mm): 1/1,000th of a meter
Micrometer (µm): 1/1,000,000th of a meter
Nanometer (nm): 1/1,000,000,000th of a meter
There are also larger units for distance, such as the astronomical unit (AU) which is used to measure distances within the solar system.
Learn more about Distance from given link
https://brainly.com/question/26550516
#SPJ1
True Or False : dentify the mass law that is demonstrated by the following observation: an old fashioned flashbulb contains magnesium and oxygen before use and magnesium oxide afterward, but the total mass of the bulb does not change.
The given statement is true about mass law that is demonstrated by observations.
This observation demonstrates the Law of Conservation of Mass, which states that in a chemical reaction, the total mass of the reactants is equal to the total mass of the products. This means that the total amount of matter in a closed system remains constant, and that the mass of substances can neither be created nor destroyed.
In the case of the flashbulb, the magnesium and oxygen react to form magnesium oxide, but the total mass of the bulb remains unchanged. This law is one of the fundamental principles of chemistry, and is widely used to explain the behavior of matter and energy in chemical reactions.
You can learn more about law of conservation of mass at
https://brainly.com/question/1992248
#SPJ4