Question

What is the density of methane at 28.5°C and 755.2 mmHg?

Answer 1

We solve the Ideal Gas equation for a `1*L` volume.....

Explanation:

`PV=nRT`....thus `PV="mass"/"molar mass"*RT`

And `P/(RT)xx"molar mass"="mass"/V=rho_(Cl_2)`

`((755.2cancel(*mm*Hg))/(760cancel(*mm*Hg*atm^-1))xx70.9*g*cancel(mol^-1))/(0.0821*(L*cancel(atm))/(cancel(K*mol^-1))xx301.7*cancelK)`

`~=2.8*g*L^-1.`