Equations

Question 1

Equation for mol

Answer 1

Mol = Mass/Mr

Question 2

Equation for mol (2)

Answer 2

Mol = volume/24

Question 3

Equation for concentration

Answer 3

Concentration = mol/vol

Question 4

Ideal Gas Equation

Answer 4

Pressure x Volume = no. Of mol x gas constant x temperature

Question 5

Equation for relative atomic mass

Answer 5

((% x relative isotopic abundance) + etc)/100

Question 6

Equation for relative atomic mass (2)

Answer 6

Relative atomic mass = (average mass of an atom x 12)/mass of one atom of carbon-12

Question 7

Equation for volume occupied

Answer 7

Volume occupied = no of mol x molar volume

Question 8

Equation for new concentration

Answer 8

New concentration = (original volume/new volume) x original concentration

Question 9

Equation for percentage mass

Answer 9

Percentage mass = (mass of element Ar/Mr of compound) x 100

Question 10

Equation for percentage yield

Answer 10

Percentage yield = (actual yield/theoretical yield) x 100

Question 11

Equation for atom economy

Answer 11

Atom economy = (Mr of desired products/total Mr of reactants) x 100

Question 12

Equation of Number of particles

Answer 12

Number of particles = no. Of mol x Avogadro’s constant

Question 13

Equation of energy

Answer 13

Energy (or how much energy lost/gained) = mass of water x shc of water x change in temperature of water or solution

Question 14

Equation for percentage uncertainty

Answer 14

Percentage uncertainty = (±Error/measurement taken) x 100