A 21.6 L cylinder contains nitrogen gas at 20.6 °C and 777 torr. How many moles of nitrogen are in the cylinder?

Question

The answer is not 0.916, nor is it 0.915. Please show steps when solving - I am very confused about this problem.

Answer 1

It makes sense looking at the conditions that we have nearly 1 mol gas. Your calculation using the Ideal Gas Law is correct. The only thing I can think of why that answer is not right would be that perhaps it is asking about mol of elemental nitrogen rather than nitrogen gas which is N₂. Therefore, for every 1 mol N₂, we have 2 mol N,

0.916 mol N₂ x 2 mol N / 1 mol N₂ = 1.832 mol N

Hopefully that is what the question is looking for but it is confusing!