Question

What is the volume of 4.00 mol `Ar` gas at 8.25 torr and 27°C?

Answer 1

Large, approx. `9*m^3`.

Explanation:

We use the Ideal Gas Equation, and should also know that `1*atm` pressure will support a column of mercury `760*mm` high. The Ideal Gas Equation requires a temperature in `"degrees Kelvin"` `=` `""^@C+273.15`.

`V=(nRT)/P`

`=` `(4.00*molxx0.0821*L*atm*K^-1mol^-1xx300*K)/((8.25*mm*Hg)/(760*mm*Hg*atm^-1))`

The units of pressure and temperature all cancel out to give an answer in `"litres"`.