Question

A sample of nitrogen gas stored in 4.0L container at 32°C exerts a pressure of 5.0 atm. What is the number of moles of nitrogen gas in the container?

Answer 1

Approx. `0.8` `mol`.

Explanation:

`n=(PV)/(RT)` `=` `(5.0*cancel(atm)xx4.0*cancel(L))/(0.0821*cancel(L)*cancel(atm)*cancel(K^-1)*mol^-1xx305*cancel(K))` `=` `??*mol`

The only real difficulty with this question is the selection of a gas constant `R`. I think in most examinations, values of `R` will be given as supplementary problem.