Question

A sample of toluene, C7H8 has a mass of 74.5 g. How many moles of benzene does it contain? How many molecules does the sample contain? How many carbon atoms does it contain?

Answer 1

Look at your post under Sam. These are worked almost the same way but if you don't understand please show what you know and tell me exactly what you don't understand about the question. As for mols of benzene, the answer is none although your teacher may count that wrong. It's a poorly worded question in my opinion.

Answer 2

I don't understand.. under Sam

Answer 3

I answered under Sam. Re-post with a follow up if the "mole" isn't clear.