Stoichiometry and the Mole Concept quiz (Singapore O-Level Chemistry, SEAB 6092) quiz

Mass multiplied by molar mass

Molar mass divided by mass

Mass divided by molar mass

Mass multiplied by the Avogadro constant

28

56

32

44

4 mol

2 mol

0.25 mol

23 mol

The big numbers (coefficients) in front of formulae

The small numbers (subscripts) inside a correct formula

The state symbols

The order of the reactants

$\text{H}_2 + \text{O}_2 \rightarrow \text{H}_2\text{O}$

$2\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O}$

$\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O}$

$2\text{H}_2 + 2\text{O}_2 \rightarrow 2\text{H}_2\text{O}$

1 dm3

12 dm3

24 dm3

1000 dm3

4.0 g

40 g

16 g

8.0 g

The reactant completely used up first, which limits the amount of product

The reactant left over at the end

The product formed in the smallest amount

The catalyst

Amount in moles multiplied by volume in dm3

Amount in moles divided by volume in dm3

Volume in dm3 divided by amount in moles

Mass divided by volume in cm3

Multiply by 1000

Multiply by 100

Divide by 1000

Divide by 10

$0.125\ \text{mol dm}^{-3}$

$0.200\ \text{mol dm}^{-3}$

$0.100\ \text{mol dm}^{-3}$

$0.0800\ \text{mol dm}^{-3}$

The number of particles in one mole (about $6.02 \times 10^{23}$)

The mass of one atom

The volume of one mole of gas

The charge on one electron

12 dm3

24 dm3

48 dm3

0.50 dm3