Samples of gases O2 , N2 , CO and CO2 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 volume occupied by :
1. X molecules of N2 .
2. 3X molecules of CO.
3. What is the mass of CO2 in grams.
4. In answering the above questions, whose law has been used.
(C = 12, N = 14, O = 16)