A 64.0 g sample of oxygen contains the same number of molecules as

Question

Quizplus · Accepted Answer

The number of molecules in a sample is directly proportional to the number of moles of the sample. The molar mass of oxygen is 32.00 g/mol, and the molar mass of nitrogen is 28.02 g/mol. Therefore, 64.0 g of oxygen contains the same number of moles as 64.0 g / 32.00 g/mol = 2.00 mol of oxygen. 2.00 mol of nitrogen has a mass of 2.00 mol * 28.02 g/mol = 56.04 g. Therefore, the correct answer is A) 44.8 L of nitrogen.

A 640 G Sample of Oxygen Contains the Same Number of of Molecules