How many moles of aspirin C9H8O4 are in a bottle containing 450 g by weight??

Question

How many moles of aspirin C9H8O4 are in a bottle containing 450 g by weight??

Answer 1

Answer 2.5 moles

Aspirin C9H8O4

Mol Wt = 180 gm/mol

No. of Moles = weight/Mol wt = 450 gm/180gm/mol = 2.5 moles

or Alternatively

Weight of 1 mole is given by the molecular weight or 1 mole weighs 180 gms

1 mole      ------  180 gm

x moles    ------   450 gm

x = 450/180 = 2.5 moles