At 0°C the density of a certain oxide of a gas at 2 bar is same as th

1.	At 0°C the density of a certain oxide of a gas at 2 bar is same as that of dinitrogen at 5 bar. What is the molecular mass of the oxide?
Answer» P = ρ{RT}/{M} If M is the molar mass of the gaseous oxide, we can write 2 bar = ρ{RT}/{M} and for nitrogen 5 bar = ρ{RT}/{28 g/mol} From these equation, we can write {5 bar}/{2 bar} = {M}/{28 g.mol} or, M = {5 bar}/{2 bar} x 28 g mol^-1 = 70 g mol^-1

At 0°C the density of a certain oxide of a gas at 2 bar is same as that of dinitrogen at 5 bar. What is the molecular mass of the oxide?

Answer»

P = ρ{RT}/{M}

If M is the molar mass of the gaseous oxide, we can write

2 bar = ρ{RT}/{M}

and for nitrogen

5 bar = ρ{RT}/{28 g/mol}

From these equation, we can write

{5 bar}/{2 bar} = {M}/{28 g.mol}

or, M = {5 bar}/{2 bar} x 28 g mol^-1

= 70 g mol^-1