Calculate the molar mass of oxygen. If 6.4 gram of oxygen occupies volume of 4.8 dm${}^3$.

Q. $3.49$g of ammonia at STP occupies volume of $4.48$ $d{m}^3$ calculate molar mass of ammonia.

Q. Gram molecular mass of Oxygen is $32g$. The density of Oxygen is $1.429g/litre$. Find the gram molar volume of Oxygen.

Q. Calculate the maximum work done in expanding $16g$ of oxygen at $30K$ and occupying a volume of $5{dm}^3$ isothermally until the volume becomes $25{dm}^3$.

Q. A sample of oxygen occupies a volume of $160d{m}^3$ at ${91}^{\circ }C$. What will be volume of oxygen when the temperature drops to ${0.00}^{\circ }C$.? (Pressure remains constant)

Q. Calculate the maximum work done in (in $kJ$) expanding $16g$ of oxygen gas at $300K$ and occupying a volume of $5d{m}^3$ isothermally until the volume becomes $25d{m}^3$.