In a certain​ chemical, the ratio of zinc to copper is 4 to 15. A jar of the chemical contains 300 grams of copper. How many grams of zinc does it​ contain? It contains nothing grams of zinc.

Answer 1

Moles Cu = 300 g x 1 mol Cu/63.55 g = 4.72 moles Cu

Moles Zn = 4/15(4.72) = 1.26 moles

mass Zn = 1.26 moles x 65.38 g/mol = 82.3 g