If you have 4.5 x 1020 molecules of SnO2, how many moles of O do you have?
The Attempt at a Solution
I'm really getting the hang of moles lately but what is bothering me in this question is 4.5 x 1020 molecules of SnO2.
If it was one molecule, you would have 2 moles of O yes?
Therefore in 4.5 x 1020 molecules, you have 4.5 x 1020 multiplied by 2? But that doesn't give me the correct answer.