Answer –
We are given , moles of N2 = 0.423 mole, moles of
CO2 = 5.73 mol
Total pressure = 777 torr
We know the relationship between total pressure and partial
pressure, Dalton’s law
Mole fraction = partial pressure / total
pressure
So, first we need to calculate mole fraction of
N2
We know,
Mole fraction of N2 = moles of N2 / total
moles
Total moles = 0.423 + 5.73
                 Â
= 6.153 moles
Mole fraction of N2 = 0.423 / 6.153
                              Â
= 0.0687
So, partial pressure of N2 = mole fraction of
N2 * total pressure
                                      Â
= 0.0687 * 777 torr
                                       Â
= 53.4 torr
