100 mL of any gas weighs 0.144g at STP. What is the vapour density of the gas?

If 300 ml of a gas weigh 0.368 g at STP, what is its molecular weight ?

If 300 ml of a gas weigh 0.368 g at STP, what is its molecular weight ?

The relative density of a gas A with respect to another gas B is 2. The vapour density of the gas B is 20, the vapour density of the gas A is:

5*6 L of a gas at S.T.P. weights equal to 8 g. The vapour density of gas is

0.24 g of a volatile liquid on vapourisation gives 45 ml of vapours at STP. What will be the vapour density of the substance? (Density of H_(2)=0.089gL^(-1) )