1.20 understand the term molar volume of a gas and use its values (24 dm3 and 24,000 cm3) at room temperature and pressure (rtp) in calculations.

1 dm³ = 1000cm³

The best way to do these calculations is by using this triangle:

Molar Volume = 24dm³

Volume = moles x 24

moles = volume ÷ 24

24 = volume ÷moles