How many moles of aspirin (C9H8O4) are in 2.00 g of aspirin?

Aspirin : 180.157 g/mol (according to Wikipedia - props)

(0.325g)/(180.157g/mol) = 0.0018mols

Unit logic :

(g )/ (g/mol) {multiply by reciprocate} = (g) x (mol/g) {"(g/g)= 1} = 1mol = mol