22.4 litres of a gas weighs 70 g at S.T.P. Calculate the weight of the gas if it occupies a volume of 20 litres at 27∘C and 700 mm Hg of pressure.
Certain amount of a gas occupies a volume of 0.4 litre at 17∘C . to What temperature should it be heated so that its volume gets (a) doubled (b) reduced to half, pressure remaining c onnstant?