Won't do your work for you. Site rules.

If you want to get from moles to molecules, all you need is to focus on using avogadro's number. Your textbook should have a few ex in the chapter dealing with avogadros number...

Post a guess. Even a bad one. Tell us why you choose this. We can work with guesses, but we are not to tell you how to do the answer step by step or to provide you with the answer.

How many molecules are in 1 mole of CO2? I'll bet that 2.1 moles have 2.1 times more.

don't you multiply 2.01 by 6.02 x 10^23??