chemistry/ stioichiometry

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Cu2S + O2- 2Cu +SO2

when 10.2 mol Cu2S react with oxygen, how many moles of Cu are formed?
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• chemistry/ stioichiometry -

Look at the equation. The coefficients are not there because they look pretty.
1 mol Cu2S yields 2 mols Cu;
2 mol Cu2S yields 4 mols Cu;
5 mol Cu2S yields 10 mols Cu;
10 mol Cu2S yields 20 mols Cu.
Get the picture?
So 10.2 mol Cu2S yields ...... mols Cu.

• chemistry/ stioichiometry -

so it is 20.4 mols cu???

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