how many grams of phosphorus is contained in 450g of P2S5 A

how many grams of phosphorus is contained in 45.0g of P2S5? A. 90.0. B. 6.27. C. 12.5

mass of P2S5 = 45.0 g

molar mass of P2S5 = 222.27 g /mol

mass of P = 61.95 g

222.27 g P2S5 --------> 61.95 g P

45.0 g P2S5 ---------------> ??

mass of P = 45 x 61.95 / 222.27

= 12.54 g

grams of phosphorus = 12.5 g