A sample of nitrogen gas, N2, contains 1.33 x 10^24 total atoms of nitrogen, N. How many moles of nitrogen molecules are present?

Question

Can you please describe how you get your answer? I want to learn what the answer is and how to figure it out so I can know how to do similar problems in the future. Thank you for your help!

Answer 1

First you'll want to divide the number of atoms by 2, since each molecule of nitrogen contains 2 atoms. This will give you 6.6e+23 molecules. Next you'll divide by Avogadro's number, 6.022e+23, since this is the number of any item (in this case, N2 molecules) in a mole. You'll end up with 1.1 moles, taking significant figures into account.