Equations

Question 1

What is the equation that combines mass, relative formula mass (Mr), and moles?

Answer 1

Mass / relative formula mass = moles

Question 2

What is Avogadro’s number?

Answer 2

6.02x10^23

Question 3

What equation combines concentration, volume, and mass?

Answer 3

Mass(g) / volume (dm^3) = concentration

Question 4

What equation combines concentration, moles, and volume?

Answer 4

Moles (mol) / volume (dm^3) = concentration

Question 5

How do you calculate a gas volume?

Answer 5

Moles x 24dm^3 = gas volume

Question 6

How do you convert cm^3 into dm^3?

Answer 6

1dm^3 = 1000cm^3

Question 7

How do you calculate percentage yield?

Answer 7

Mass of product made l maximum theoretical mass of product X 100 = percentage yield

Question 8

How do you calculate atom economy?

Answer 8

Relative formula mass of desired product / sum of relative formula masses of all reactants x 100 = atom economy

Question 9

How do you calculate the mean rate of reaction?

Answer 9

Quantity of reactant used OR product formed / time taken = mean rate of reaction

Question 10

What is the calculation for chromatography?

Answer 10

Rr = distance moved by a substance / distance moved by solvent