The density of a gas at S.T.P. is 1.40 grams per litre. The molecular weight of the gas is
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)
If a certain quantity of electricity liberates 11.2 litres of oxygen at S.T.P. If same quantity of electricity liberates 60 grams of a tetravalent element, the atomic weight of the element is: