examples (mass to mol)
•calculate molar mass of juglone (C10H6O3)
what is the mol of 1.56 g of this stuff?
•molar mass C10H6O3 = 174.1 g/mol
1.56 g C10H6O3
174.1 g C10H6O3
1 mol C10H6O3
=
0.00896 mol C10H6O3
mol  formaldehyde (H2CO) in 7.55-g sample?
mol tetraphosphorus decoxide in a 250.0-g sample?
0.251 mol
0.8805 mol