The mole of oxygen are formed from KMNO3 is 0.724 mol.
calculation:-
Given the mass of KNO3 KNO3 is 82.5g
The molar mass is 101.11 g/mol.
Mole of KNO3 = 82.5g/ 101.11 g.
0.724 mol
From the balanced equation, it is clear that for every 1 mole of KNO3 K N O 3 = 54 moles of oxygen are required.
Therefore, 0.724 mol of oxygen is required for forming 82.5 g of KNO3 KNO 3.
The formula mass of a substance is defined as the sum of the atomic masses of the atoms that make up the ionic compound. It is generally used for ionic compounds that do not contain individual molecules but contain ions as building blocks. Mass can be defined as a measure of the amount of matter in the body. Weight is a measure of weight acting on the mass. The SI unit of mass is the kilogram.
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how many coefficients need to be changed to make this chemical equation balanced? Zn + HNO3 --> Zn (No3)2 + H2
Coefficient 2 should be placed in the equation before the nitric acid in the reactant so that the chemical reaction becomes balanced.
The given chemical reaction is,
Zn + HNO3 --------> Zn (No3)2 + H2
Here, the elements Hydrogen, Nitrogen, and Oxygen are unbalanced.
These elements are altogether found in HNO₃ on the reactant side and are found as nitrate and hydrogen gas on the product side.
To balance the equation, the coefficient 2 is to be added in the reactant side so that 2 moles of Hydrogen, Nitrogen, and Oxygen would be balanced with 2 moles of Nitrate and two moles of Nitrogen.
On adding 2 on reactant side, we get
Zn + 2HNO3 -----------> Zn(NO3)₂ + H₂
This gives us a balanced equation and thus the equation could be balanced this way.
Therefore, coefficient 2 is to be added to make the equation to be balanced.
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select the single best answer. halogens are not the only atoms or groups that can be replaced by nucleophilic aromatic substitution as the following reaction shows. h512p601 what is the leaving group in this reaction? (formal charges have been intentionally omitted.) h512p60c h512p60b h512p60a
NO2 is in the form of O=N+-O, As a nucleophilic leaving group it should be in form of O=N-O¯. So the correct option is first one.
What is nucleophilic aromatic substitution?
It is a classical reaction in which a nucleophile displaces a leaving group on an aromatic ring.The presence of electron-withdrawing group increases the rate of nucleophilic aromatic substitutionNucleophilic aromatic substitution does not follow SN2 reaction mechanism, as the substitution takes place at trigonal carbon atom having sp3 hybridisation.It does not follow the SN2 reaction mechanism because of the steric hindrance of the benzene ring.Nucleophilic aromatic substitution may follow SN1 reaction mechanism in presence of an excellent leaving group.SN1 reaction would involve elimination of leaving group and formation of aryl carbocation.Generally, Nucleophilic aromatic substitution follows elimination addition or addition elimination pathway.NO2 is in the form of O=N+-O, As a nucleophilic leaving group it should be in form of O=N-O¯. So the correct option is first one.
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note: complete question is attached
A sample of oxygen at a temperature of 20 °c occupies a volume of 335 ml. How many moles of gas are present if the pressure is 0. 998 atm?.
Us the PV=nRT formula!
Element X is an element in period 5. Identify X given that in the molecule XF2, it exhibits hybridization sp3. Indicate the symbol and not the name of the element. Explain.
Group 5 Element X in the molecule XF2 is Sb.
Periodic table is the arrangement of the row and columns of the chemical elements. In the periodic table, period 5 contain 18 elements. These are Rb, sr, Y, Zr, Nb, Mo, Tc,Ru,Rh,Pd,Ag,Cd,In,Sn,Sb,Te,I,Xe.
The Sb atoms are hybridizes with sp3 to form a stable hexagon ring structure. Sb can act as a central atom in SbF2. In this structure it is bonded with 3 F molecule. This has no lone pair of electrons. Sb is a toxic chemical element. Its atomic number is 51.this is the additives for chlorine and bromine found in many commercial and domestic products.it improves the properties of the alloy.
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The characteristics of two unknown intermolecular forces, C and D, are compared in the table.
Intermolecular Forces
C D
Occurs between polar asymmetrical molecules Occurs between non-polar or polar symmetric molecules
Which of the following conclusions about the two intermolecular forces is correct?
a
C represents ion-dipole forces, and D represents dipole-dipole forces
b
C represents dipole-dipole forces, and D represents London dispersion forces
c
C represents London dispersion forces, and D represents ion-dipole forces
d
C represents hydrogen bonding, and D represents London dispersion forces
Answer: represents London dispersion force and B represents hydrogen bonding
Explanation:
What does a molecule structurally have to have in order to be able to form condensation polymers vs only being able to form a single ester?.
The ester can polymerize if both the acid and the alcohol have different functional groups.
What is a molecule, for instance?A molecule is the smallest unit of any material that is composed of one or more elements and is capable of existing independently while maintaining all of the substance's physical and chemical properties. Further atom division occurs within molecules. For instance, the symbols for the oxygen atom and molecule are O and O2, respectively.
What is a molecule, exactly?The smallest component of a substance which possesses both its chemical and physical characteristics. One or even more atoms make up molecules.
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explain why cf4 and xef4 are nonpolar compounds (have no net dipole moments) while sf4 is polar (has a net dipole moment)
CF₄ and XeF₄ are nonpolar compounds (have no net dipole moments) while SF₄ is polar (has a net dipole moment)
The Lewis structure for CF₄ and XeF₄ Both of them have symmetrical shapes and arrangements of polar bonds. This results in the cancellation of all polar vectors and a net dipole moment of zero. These are non-polar.
CF₄ is a tetrahedron with carbon at the center and fluorine at the four points. The dipole moments of the individual bonds cancel each other out.
Each of the other molecules is also a tetrahedron. Fluorine is more electronegative than chlorine, which is more electronegative than hydrogen. The dipole vector for each bond is the difference between the polarities of the two atoms. The dipole moment of the entire molecule is the vector sum of all of the individual bond dipole moments.
CF₄ and XeF₄ cancels itself out and has no dipole.
SF₄ on the other hand have The lone pair of electrons causes this compound to have a net dipole moment. It has no opposite pair of electrons that could cancel its pull, this results in it being polar.
therefore, CF₄ and XeF₄ are nonpolar compounds (have no net dipole moments) while SF₄ is polar (has a net dipole moment)
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Convert 6.7 x 10^24 atoms of sulfur into moles of sulfur
Answer:
1.1142614300909401e-23
Explanation:
1.1142614300909401e-23
I only need 2,5,6,7,8,9,10,11 this is honors chem
A 0. 1326 g sample of magnesium was burned in an oxygen bomb calorimeter. The total heat capacity of the calorimeter plus water was 5,760 j/°c. If the temperature rise of the calorimeter with water was 0. 570°c, calculate the enthalpy of combustion of magnesium. Mg(s) + 1/2o2(g) →mgo(s).
The enthalpy of combustion of magnesium is -602KJ/mol
A combustion reaction is a reaction in which a substance reacts with the oxygen gas, releasing energy in the form of light and heat. Combustion reactions generally involves O2 as one reactant.
Heat capacity is defined as the amount of heat required to raise the temperature of the substance by one degree Celsius. Whereas the specific heat capacity of a substance is defined as the heat capacity per unit mass and it is measured in joules per kilogram per degree.
To calculate the heat absorbed by the calorimeter we use;
q = C × ΔT
q = 5760 × 0.570
q = 3283.2 J
So, 0.1326 grams of Magnesium releases energy q = 3283.2 J
Then 1 gram of Magnesium releases = 3283.2 ÷ 0.1326 = 24760 J/g
1 mol Mg = 24.31 grams
Hence, 1 mol Mg releases energy = 24.31 × 24760 = 601916 J/mol
⇒ 601.92 KJ/mol ≈ 602KJ/mol
Heat of combustion is always negative so, q = -602KJ/mol.
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write out the cations and anions
Options A and B are anions whereas options C, D, and F are cations.
What are cations and anions?Cations are the ions that have a positive charge while the other hand, anions are the ions that are negatively charged. Ions are charged atoms or molecules. If a neutral atom loses one or more electrons, it will attain a positively charged cation whereas if a neutral atom gains one or more electrons, it will have a negatively charged anion.
Cations are positive ions. They are positively charged because they have lost one or more number of electrons and that's why it has more protons than electrons. Anions are negative ions. They are negatively charged because they gain one or more electrons so that's why have more electrons as compared to protons.
So we can conclude that A and B are anions whereas C, D, and F are cations.
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Which of the following ionic compounds has the highest (most negative) lattice energy? SrF2 MgF2 SrI2 KCl NaF LiF CaCl2
Highest lattice energy present in MgF₂.
Ionic compounds having following properties has highest lattice energy.
(i) Ions having small radii
(ii) Compound having high charge
KCl, NaF and LiF all are +1 and -1 charges respectively
But in SrF₂, MgF₂ and CaCl₂ , each cation is dipositive
But size order of cations is:
Mg < Ca< Sr
Thus, Answer is MgF₂.
In chemistry, the lattice energy is the energy exchange upon formation of one mole of a crystalline ionic compound from its constituent ions, which can be assumed to initially be within the gaseous kingdom. It's far a measure of the cohesive forces that bind ionic solids.
Lattice energy may be described because the energy required to transform one mole of an ionic stable into gaseous ionic parts. Alternatively, it may be described as the power that ought to be provided to one mole of an ionic crystal with a purpose to separate it into gaseous ions in a vacuum thru an endothermic system.
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how many grams of water would you need to make an 89% plutonium aqueous solution by mass. the total solution is 3500 grams.
325 g of water would be need to make an 89% plutonium aqueous solution by mass, if the total solution is 3500 grams.
This problem is solved by using the concept of total mass percentage
Total mass percentage can be given as
Mass percentage = sum of mass percentage of elements in solution.
100% = 89% of plutonium aqueous solution by mass+ x V of water solution by mass
(100 - 89)% = x% of water solution by mass
11 % = x% of water solution by mass
mass percentage of water =( mass of water / mass of total solution) × 100
11 / 100 = mass of water / mass of total solution
mass of water =( 11/ 100) × 3500
= 325 g.
Thus, we concluded that 325 g of water would be need to make an 89% plutonium aqueous solution by mass, if the total solution is 3500 grams.
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the elements phosphorous and oxygen have their percentage composition to be 43.64% and 56.36% calculate the empirical formula
The empirical formula of the compound would be [tex]P_2O_5[/tex].
What is the empirical formula?The empirical formula of a compound is the chemical formula of the compound based on the simplest whole-number ratio of its component atoms.
The compound in question contains phosphorus, P, and oxygen, O.
P = 43.64
O = 56.36
First, let's find the moles of each atom by dividing their percentage composition by their respective molar weights.
P = 43.64/30.97
= 1.4
O = 56.36/16
= 3.5
Next would be to divide the moles by the smallest mole.
P = 1.4/1.4
= 1
O = 3.5/1.4
= 2.5
Thus, the smallest, whole-number ratio of the two atoms would be 2:5. In other words, the empirical formula of the compound is [tex]P_2O_5[/tex].
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Cyclohexanol, CeH₁1OH, is an organic chemical used i the production of nylon. How many hydrogen atoms are in 2.25 moles of cyclohexanol? Give your answer in
scientific notation.
The number of atom of hydrogen present in 2.25 moles of cyclohexanol C₆H₁₂O is 1.63×10²⁵ atom
Cyclohexanol is a colorless thick liquid or sticky solid with a faint mothball odor
Here we shall determine the number of moles of hydrogen present in 2.25 moles of cyclohexanol C₆H₁₂O then
1 mole of cyclohexanol C₆H₁₂O contain 12 mole of hydrogen
Therefore 2.25 mole of cyclohexanol C₆H₁₂O will contain = 2.25×12 = 27 moles of hydrogen H
Then we shall determine the number of atom of hydrogen present 2.25 moles of cyclohexanol C₆H₁₂O then
Then from Avogadro hypothesis
1 mole of hydrogen = 6.02×10²³ atom
Then 27 mole of hydrogen = 27 moles ×6.02×10²³ atom
27 mole of hydrogen = 1.63×10²⁵atom
Thus we can conclude that the number of atom of hydrogen present is 1.63×10²⁵atom
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molality is defined as the number of moles of solute per kilogram of solvent. in dilute aqueous solutions of electrolytes, the greater the number of particles produced by the electrolyte per kilogram of water, the lower the freezing point of the solution. the freezing points of dilute aqueous solutions of equal molality of the two electrolytes in which of the following pairs would be most different from each other?
The freezing points of dilute aqueous solutions of equal molality of the two electrolytes then pairs would be most different from each other are LiBr and Al₂(SO₄)₃
Molality is defined as the number of moles of solute per kilogram of solvent freezing point is the temprature at which liquid become a solid called as freezing point and the freezing point of solution are all lower than that of the pure solvent and is directly proportional to the molality of the solute then the pairs would be most different from each other are LiBr and Al₂(SO₄)₃
The given question is incomplete so the complete question is
Molality is defined as the number of moles of solute per kilogram of solvent. In dilute aqueous solutions of electrolytes, the greater the number of particles produced by the electrolyte per kilogram of water, the lower the freezing point of the solution. The freezing points of dilute aqueous solutions of equal molality of the two electrolytes in which of the following pairs would be most different from each other?
A. K2SO4 and CoI2
B. AgClO4 and Ni(NO3)2
C. LiBr and Al2(SO4)3
D. MgCl2 and ZnSO4
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suppose one could keep the rate of growth of new grains constant and increase the rate of nucleation. would the recrystallized grain size increase or decrease? motivate your answer
the recrystallized grain size will decreases on in the recrystallization reaction.
Recrystallization is a technique used to purify chemicals. This is done by dissolving a mixture of a compound and impurities in an appropriate solvent, the desired compound or impurities can be removed from the solution, leaving the other behind.
Recrystallization does not involve a chemical reaction. In this process the crude product is simply taken into solution, and then the conditions are changed in order to allow crystals to re-form. Recrystallization produces a much purer, final product at the end.
As in the above case given if rate of Nucleation increases keeping the rate of new grains growth constant, the ratio will increase and grain size will decrease.
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Determine the Unknown Mixture
Gas A
Gas B
Gas C
Gas D
Unknown
mixture
Here spectra of four
different gases.
What gas/gases does the
unknown gas mixture
have?
The unknown gas is the mixture of gas A and gas D as interpreted by the spectra.
What is Emission spectra of gases?The pattern of lines created when light is split into its many frequencies by a prism is known as an emission spectrum. Only specific light wavelengths are emitted when gases are heated (an emission spectrum). Each gas has different wavelength. In a spectrum, an emission line can be seen if a source emits radiation at a particular wavelength. This emission happens when an excited atom, element, or molecule switches to a lower-energy form. Some of the light that passes through a cold item (gas or solid) can be absorbed. The amount of energy that an object's atoms possess is determined by the object's temperature.
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A certain cation has five atoms and an overall charge of +1. Which of the following combinations of tformal charges on the five atoms is indicative of the "best" Lewis
structure?
O-1, +1, 0, 0, +1
O 0, 0, 0, +1,0
O 0, 0, 0, +2, -1
O 0, 0, 0, 0, 0
FCC unit cell consist of O,0,0,0,+1,0 atom.
What is atom?
Each atom is made up of a nucleus one and or more electrons that are bound to it. One or even more protons and a significant number of neutrons make up the nucleus. Only the most prevalent type of hydrogen is neutron-free. Atoms that are neutral or ionised make up every solid, liquid, gas, as well as form of plasma. Atoms are incredibly tiny, measuring typically 100 picometers across. Due to quantum effects, they are so small that it is impossible to predict their behaviour with sufficient accuracy using classical physics, as would be the case, for example, if they were tennis balls.
FCC stand as a face centred cubic unit cell structure
Consists of atom arrange in a cube where is corner of the cube has a friction of an atom with 6 additional fool at terms situated at the middle of every cube.
cube has 8 corners and 6 faces
Each atom at the corner contributes 1/8 of itself to a particular cubic crystal lattice.
A 8 atoms × 1/8 = 1 Atom ( at corners)
Each atom at a face centre contributes 1/2 of itself to a particular cubic crystal lattice.
6 atom × 1/2 = 3 atoms
Total atoms in a fcc lattice is 4 atoms.
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How many grams of copper are in
3.42 moles of copper? The molar
mass of copper is 63.55 g/mol.
Explanation:
Answer : The mass of copper is 217.3 grams.
Explanation : Given,
Moles of copper = 3.42 mole
Molar mass of copper = 63.55 g/mole
Formula used :
Now put all the given values in this formula, we get:
Therefore, the mass of copper is 217.3 grams.
Based on the balanced chemical equation for reaction 5 what compounds were being removed when the recovered copper product was washed repeatedly with water?.
Based on the balanced chemical equation for reaction 5 aluminum III ion and copper II sulphate compounds were being removed when the recovered copper product was washed repeatedly with water
A chemical equation consist of reactant product and an arrow showing the direction of reaction and the equation in which number of atom of all the molecules is equal on both side of the equation is known as balanced chemical equation and when recovered copper product was washed repeatedly with water the compound removed during those washes were aluminum II ion and copper II sulphate
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Two bowling balls are rolling down a hill. It is determined that they each have the same amount of kinetic energy. However, one ball weighs twice as much as the other. What can you conclude about the speed of each ball based on this information? Explain.
If two bowling balls are rolling down a hill. It is determined that they each have the same amount of kinetic energy. However, one ball weighs twice as much as the other. Then the body with lighter mass have greater speed than the heavier body.
What is Kinetic motion?Kinetic energy is defined as the half of the product of massof the object and square of the velocity by which body move.
Mathematically, it may be defined as the
K. E = 1/2 × mv²
v² = 2K. E / m
Since, we noticed that velocity is inversely proportional to the mass of the body. Therefore, light body move with greater kinetic energy than the heavier body.
Thus, we concluded that two bowling balls are rolling down a hill. It is determined that they each have the same amount of kinetic energy. However, one ball weighs twice as much as the other. Then the body with lighter mass have greater speed than the heavier body.
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In the introductory week 1 experiment, the developing solvents were 5% sodium chloride aqueous solution and 5% isopropanol aqueous solution. Draw separate molecular diagrams of how sodium chloride and isopropanol would interact in water. Identify the types of intermolecular attractions within each diagram. Based on the diagrams and intermolecular attractions identified in Question 2, predict and compare the nature of intermolecular interactions experienced by the FD&C Red No. 40, Blue No. 1, and Yellow No. 5 dyes with the two solvents. Chromatography paper, and paper in general, is highly hydrophilic. Paper is made from a natural polymer called cellulose, which is a long chain of glucose molecules. Glucose is a cyclic structure with a number of –OH groups around the ring. Predict and explain the types of intermolecular forces that would occur between paper and water. How do these interactions account for the hydrophilic nature of paper? Explain the types of intermolecular interactions that would occur between the FD&C Red No. 40, Blue No.1, and Yellow No. 5 food dyes and the paper.
2. When NaCl is dissolved in water it forms Nat and CL-ions which interact with water with ion-dipole forces of attraction. There exists a sphere of water molecules around respective ions.
Whereas in isopropyl alcohol there exists H- Bonds as well as Ion-dipole forces in these dyes in comparison to those there will
3.) There will exist H bonding in all these dyes along with ion-dipole forces of attraction as well as repulsive forces as well because of nonpolar groups in dyes and polar water molecules but attractiveness will be more than that of repulsive ones.
4. Chromatography papers are generally made up of cellulose which is again a polymer of glucose. Now there exist H bonds between hydroxyl groups of paper that are hydrophilic which means water-loving. polymer and water molecules. Because of this H binds chromatography.
B. There will exist again hydrogen bonds among dye and chromatogram more will be the attractions between dye and paper lesser will be retention factor it will adsorb more or lesser will go with solvent.
In chromatography, there are also intermolecular forces such as hydrogen bonding and dipole-dipole interactions that help keep the analytes on the stationary phase of the column. The stronger the intermolecular forces, the stronger and longer the compound will be retained on the column. It is a type of planar chromatography that uses cellulose filter paper to act as the stationary phase for the separation of compounds.
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a clear, yellow-colored solution is mixed with a clear colorless solution in a glass container. immediately upon mixing, a red-colored solid is formed that sinks to the bottom of the container. has a chemical reaction occurred? explain how you made your decision.
Yes there will a chemical reaction.
What is chemical reaction ?
Chemical reaction, the process by which one or more substances (reactants) are transformed into one or more other substances (products). Substances are either chemical elements or compounds. Chemical reactions rearrange the constituent atoms of reactants to produce different substances as products.
Chemical reactions are an integral part of technology, culture, and even life itself. Fuel combustion, iron smelting, glass and pottery making, beer brewing, and wine and cheese making are just a few examples. Activities involving chemical reactions that have been around for thousands of years. Chemical reactions are abundant in a variety of complex processes that occur in Earth's geology, atmosphere and oceans, and in all biological systems.
Assume the solution A was acid and solution B was a base. When we'll mix both of them with each other, acid base reaction will occur. It'll lead to the formation of salt , which will get precipitated. So in this reaction, same thing happened . Any one of the solution is acid and other one is base. And when we mix them it undergo acid base reaction and formation of salt occurred which is red precipitation.
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a large beaker of water is placed on a scale, and the scale reads 40 n. a block of wood with a weight of 10 n is then placed in the beaker. it floats with exactly half of its volume submerged. assuming that none of the water spilled out of the beaker when the block was added, what does the scale read now?
Assuming that none of the water spilled out of the beaker when the block was added, then the scale reads 50 N.
What is buoyancy?Buoyancy is also called as upthrust. It is an upward force exerted by a fluid that opposes the weight of a partially/ fully immersed object. In column of fluid, pressure increases with depth due to the weight of the overlying fluid.
Given that scale reads 40 N
A block of wood of weight 10 N is placed in beaker,
Now, the scale will read 50 N as it has the weight of both water and wood. No water is spilled out of beaker when block was added and wood is also present .
Now, total reading on scale is 40+10 =50 N
Although effective weight of wood is less as buoyancy is acting on it.
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Strontium-90 has a half-life of 28 years. If a 8.00 mg sample were stored for 112 years, what mass of 90Sr would remain?
The mass of Strontium-90 left after 112 years with an half-life of 28 years is 0.5 mg.
What is mass?Mass can be defined as the quantity of matter a body contains.
To calculate the mass of Strontium-90 left, we use the formula below.
Formula:
R' = R/([tex]2^{n/t}[/tex])............... Equation 1Where:
R' = Mass of Strontium-90 leftR = Original mass of Strontium-90n = Total time t = Half-life of Strontium-90From the question,
Given:
R = 8.00 mgt = 28 yearsn = 112 yearsSubstitute these values into equation 1
R = 8/([tex]2^{112/28}[/tex])R = 8/2⁴R = 8/16R = 0.5 mgHence, the mass of Strontium-90 left is 0.5 mg.
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What is the mass of a billiard ball that has a volume of 100 cm³ and a density of 2. 5 g/cm³?.
the mass of a billiard ball that has a volume of 100 cm³ and a density of 2. 5 g/cm³ is 250 g
mass can be determined by the density of an object and volume.
The mass of a substance can be calculate by using the formula
From the question
mass = density * volume
mass = 2. 5 g/cm³ * 100 cm³
mass = 250 g
therefore,the mass of a billiard ball that has a volume of 100 cm³ and a density of 2. 5 g/cm³ is 250 g
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Temperature is a measure of the _______ energy of the molecules within a substance.
Temperature is a measure of the kinetic energy of the molecules within a substance.
Temperature measures the average kinetic electricity of the particles in a substance. Thermal power measures the whole kinetic energy of the debris in a substance. The greater the motion of debris, the better a substance's temperature and thermal energy.
All molecules have electricity and are in steady motion, they vibrate. This vibration is the energy of the problem and can be measured as temperature. most matter expands when heated, and whilst cooled it contracts. The greater electricity something has, the better its temperature and the greater its molecules are vibrating.
The time period is commonly used for the electricity levels of electrons in atoms, ions, or molecules- which might be sure via the electric subject of the nucleus. Also can seek advice from energy tiers of nuclei or vibrational or rotational energy tiers in molecules.
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which criteria are important in determining the lewis structure for a molecule that is the greatest contributor to the resonance hybrid? select all that apply. g
The greatest contributor to the resonance hybrid is the resonance form with the smallest formal charges. The main resonance contributor is the one with the lowest energy. The question was incomplete, this is a general answer.
Resonance contributorsWe can write some Lewis structure for a molecule, differing only in the positions of the electrons. The most stable structure contributes the most to the resonance hybrid. Any of a set of Lewis structures that differ only in the distribution of electrons in covalent bonds and single pairs. the weighted average of the resonance contributors gives the hybrid resonance. It often occurs in structures when the double bond lies opposite the single bond and forms two identical Lewis structures. The point of this is that double bonds and single bonds from one molecular structure can move or exchange positions so as to form a structure that is identical to the previous molecular structure. For example on O₃ (ozone).
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What is the mole fraction of NaCI in
a mixture of 0.564 g NaCl,
1.52 g KCI, and 0.857 g LiCI?
Molar Mass
NaCl: 58.44 g/mol
KCI: 74.55 g/mol
L LICI: 42.39 g/mol
0.402 is the mole fraction of NaCl in a mixture of 0.564 g of NaCl, 1.52 g of KCl and 0.857 g of LiCl.
What is Mole Fraction ?Mole fraction is defined as the given amount of moles divided by the total amount of the component in a mixture.
The formula for finding the mole fraction is
Mole Fraction = Moles of Component / Mole of total components
First we have to find the mole of NaCl
Moles of NaCl = Given Mass of NaCl/ Molar Mass of NaCl
= 0.564 gram/58.4 gram/mole
= 0.00965 mole
Now we have to find the mole of KCl
Moles of KCl = Given Mass of KCl/ Molar Mass of KCl
= 1.52 gram/74.55 gram/mole
= 0.0204 mole
Now we have to find the mole of LiCl
Moles of LiCl = Given Mass of LiCl / Molar Mass of LiCl
= 0.857 gram/42.39 gram/mole
= 0.0202 mole
Mole Fraction of the NaCl = Moles of NaCl/ Mole of NaCl + LiCl + KCl
= 0.00965/0.00965 + 0.0204 + 0.0202
= 0.192
Thus, from the above conclusion we can say that 0.402 is the mole fraction of NaCl in a mixture.
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