One litre of air contains about 1 x 10^-2 moles of O₂.What is the mass of O₂ contained in a room 10 m long by 5 m wide by 3 m high?

Question

Quizplus · Accepted Answer

The volume of the room is 10 m x 5 m x 3 m = 150 m³, which is 150,000 litres. Since 1 litre contains 1 x 10⁻² moles of O₂, 150,000 litres contain 1500 moles. The molar mass of O₂ is 32 g/mol, so the mass is 1500 moles x 32 g/mol = 48,000 g = 48 kg.

One Litre of Air Contains About 1 X 10-2 Moles

One Litre of Air Contains About 1 X 10^-2 Moles