A gas mixture contains 82% (w/w) methane, CH4, and 18% (w/w) ethane, CH. If a 15.50 g sample of the gas mixture is placed in a 15-L container at
20.0°C, calculate
(1)
the total moles of gases,
(ii) the total pressure (atm) and
(iii)
the partial pressure of each gas in the container.
[7 marks