A $0.5090g$ mass of gas exerts a pressure of $746mmHg$ , and occupies a volume of $0.1294L$ at a temperature of $364*K$ ? What is its molecular mass?

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Answer 1 · 2017-04-17T20:38:40

$"Molecular mass"<=120*g*mol^-1$

From the Ideal Gas Equation:

$n=(PV)/(RT)$

i.e. $"mass"/"molar mass"=(PV)/(RT)$

i.e. $"molar mass"=("mass"xxRT)/(PV)$

$=(0.5090*gxx0.0821*L*atm*K^-1*mol^-1xx364*K)/((746*mm*Hg)/(760*mm*Hg*atm^-1)xx0.1294*L)$

$??*g*mol^-1$

A 0.5090*g0.5090*g mass of gas exerts a pressure of 746*mm*Hg746*mm*Hg, and occupies a volume of 0.1294*L0.1294*L at a temperature of 364*K364*K? What is its molecular mass?