P. 4459. A certain amount of ideal gas contains Helium atoms and Oxygen molecules. The mass of the mixture is 20 gram, its volume is 18.63 litres at a temperature of 27 oC and at a pressure of 200 kPa.
How many moles of Helium and how many moles of Oxygen are there in the gas?
Deadline expired on 10 October 2012.