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.

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 · 0 votes
Moles Cu = 300 g x 1 mol Cu/63.55 g = 4.72 moles CuMoles Zn = 4/15(4.72) = 1.26 molesmass Zn = 1.26 moles x 65.38 g/mol = 82.3 g
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7 hundreds blocks = 700

5 tens blocks = 50

8 ones blocks = 8
  add them

700 + 50 + 8 = 758