Mole Concept (use of 4 formulae)

11

17

23

35.5

64 + 32 + 16 + 1 + 16

64 + (1 × 32) + (4 × 16) + 5(2 + 16)

64 + (1 × 32) + (4 × 16) × 5(2 + 16)

4(64 + 32 + 16) + 5(2 + 16)

8 g

16 g

24 g

32 g

0.1

0.3

1.4

1.7

0.25 mol of magnesium oxide

0.5 mol of magnesium oxide

the same number of moles as 10 g of zinc oxide

5 g of magnesium atoms and 5 g of oxygen atoms

0.5 dm³ of argon (Ar)

200 cm³ of ammonia (NH₃)

5 dm³ of hydrogen (H₂)

1000 cm³ of water vapour (H₂O)

3 × 10²³

9 × 10²³

1.2 × 10²⁴

2.4 × 10²⁴

The mole is a unit of measurement for very small particles.

A mole of any gas occupies 24 dm³ at room temperature and pressure.

Equal volumes of any gas have the same mass.

The mass of 1 mole of a compound is equal to its M_r in grams.

0.02 mol/dm³

0.08 mol/dm³

0.04 mol/dm³

0.80 mol/dm³

0.10 mol of HCl in 0.10 dm³ of solution

0.10 mol of HCl in 1.00 dm³ of solution

36.5 g of HCl in 0.10 dm³ of solution

36.5 g of HCl in 1.00 dm³ of solution