Problem P. 4459. (September 2012)
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 ^{o}C and at a pressure of 200 kPa.
How many moles of Helium and how many moles of Oxygen are there in the gas?
(4 pont)
Deadline expired on 10 October 2012.
Sorry, the solution is available only in Hungarian. Google translation
Megoldásvázlat. 1 mol hélium és 0,5 mol oxigén.
Statistics:
230 students sent a solution.  
4 points:  158 students. 
3 points:  11 students. 
2 points:  26 students. 
1 point:  23 students. 
0 point:  8 students. 
Unfair, not evaluated:  4 solutions. 
