Quantitative Chemistry (C4)

Question 1

What’s the equation for gas volumes?

Answer 1

Moles = Volume / 24

Question 2

What’s the equation for concentration?

Answer 2

Concentration = Mass / Volume

Question 3

What is relative formula mass?

Answer 3

The sum of the relative atomic masses of the atoms in the formula

Question 4

What is relative formula mass?

Answer 4

The sum of all the relative atomic masses of the atoms in a formula

Question 5

How do you calculate moles?

Answer 5

Mass / Mr

Question 6

What is a limiting reactant?

Answer 6

The reactant that is fully used up, the other reactant is in excess to ensure this

Question 7

What’s the equation for percentage yield?

Answer 7

Actual mass / Theoretical mass

Question 8

What’s the equation for atom economy?

Answer 8

Mr of desired product / Mr of total reactants

Question 9

Convert 1 dm^3 to cm^3

Answer 9

1000 cm^3

Question 10

Convert cm^3 to dm^3

Answer 10

1000cm^3 = 1 dm^3

Question 11

How do you calculate moles from concentration?

Answer 11

Moles = Volume x Concentration

Question 13

How do you calculate moles from concentration?

Answer 13

Moles = Concentration x Volume

Question 14

What is the order for concentration questions?

Answer 14

Ratio:
Moles:
Volume:
Concentration:

Question 15

What is the order for mass questions?

Answer 15

Mass:
Mr:
Moles:
Ratio: