The mass of oxygen gas (in Kilo grams) occupying a volume of 11.2 litre at a temperature 270C and a pressure of 76cm of mercury is :
(Molecular weight of oxygen = 32)
2 grams of monoatomic gas occupies a volume of 2 litres at a pressure of 8.3×105Pa and 1270C . Find the molecular weight of the gas. (R=8.3 joule/mole/K)