If phosphorus is considered to contain P4 molecules, then calculate the number of moles in 100 g of phosphorus?
Mass of 1 mole of P4 = 4P = 4 x 31 = 124 g
124 g of phosphorus (P4) = 1 mole
∴ 100 g of phosphorus (P4) = 1124\dfrac{1}{124}1241 x 100 = 0.806 moles
