The molecular weight of 2.6 gm of a gas which occupies 2.24 litres at $0^{o}C$ & 760 mm pressure is :

Q. $22.4$ litres of a gas weighs $70$g at S.T.P. Calculate the weight (gm) of the gas if it occupies a volume of $20$ litres at ${27}^o$C and $700$mm Hg of pressure.

Q. 16 gm of oxygen and 3 gm of hydrogen are mixed and kept in 760 mm pressure at $0^{o}C$. The total volume occupied by the mixture will be nearly:

Q. The total weight of a gas mixture which contains $11.2$ litres of $C{O}_2$, $5.6$ litres of $O_2$, $22.4$ litres of $N_2$, $44.8$ litres of $He$ at $0^{o}C$ and $760$ $mm$ of $Hg$ pressure is:

Q. The volume occupied by $3.5$ g of $O_2$ gas at ${27}^{o}C$ & $760$ mm pressure is: