Question

in a certain chemical the ratio of zinc to Copper is for 4 to 11 a jar of the chemical contains 385 grams of copper how many grams of zinc does it contain.

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