In a Regnault's experiment, the mass of a definite volume of a gas was found to be 4.6420 g, whereas the mass of the same volume of hydrogen at the same temperature and pressure was found to be 0.2902 g. Calculate the vapour density and molecular mass of the gas.

In a Regnault's experiment, the mass of a definite volume of a gas was

1.	In a Regnault's experiment, the mass of a definite volume of a gas was found to be 4.6420 g, whereas the mass of the same volume of hydrogen at the same temperature and pressure was found to be 0.2902 g. Calculate the vapour density and molecular mass of the gas.
Answer» SOLUTION :Mass of the GAS =4.6420 g Mass of the same volume of `H_(2) = 0.2902` `therefore V.D = ("Mass of the gas")/("Mass of the same volume of HYDROGEN")` `=4.6420/0.2902 = 15.9959` `therefore` MOLECULAR mass `=2 xx V.D. = 2 xx 15.9959` = 31.99