Question

Samples of the gases O₂, N₂, CO₂ and CO under the same conditions of temperature and pressure contain the same number of molecules represented by X. The molecules of Oxygen, occupy V litres and have a mass of 8 g. Under the same conditions of temperature and pressure :
What is the mass of CO₂ in g?

Answer 1

X molecules of O₂ = 8/32 = 1/4 mole of O₂
So, X molecules of CO₂ = 1/4 molecule of CO₂
So, Mass of CO₂ present in the sample = 1/4 x gram molecular mass of CO₂
= 1/4 x 44 = 11g