I need help with mole conversions like Mass, Molecules, and Atoms.Also finding # of formula units.?

Molecules ex: 0.116 mol NO2
Mass ex: 1.62 mol CaCO3
Oh and how would you find the number of moles for something like 3.25*10^23 formula units of FeSO4 and 8.17*10^24 molecules of NH3
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