Question

A sample of gas has a mass of 0.555 g. Its volume is 117 mL at a temperature of 85 degrees C and a pressure of 753 mmHg. What is the molar mass of the gas?

Answer 1

We solve the Ideal Gas equation......and we know that `1*atm` will support a column of mercury that is `760*mm` high.....

i.e. `1*atm-=760*mm*Hg`

Explanation:

`n=(PV)/(RT)="Mass"/"Molar mass"`

And thus `"Molar mass"=(RT)/(PV)xx"mass"`

`(0.0821*(L*atm)/(K*mol)xx358.1*Kxx0.555*g)/((753*mm*Hg)/(760*mm*Hg*atm^-1)xx0.117*L)=??*g*mol^-1`....