Question

How many moles of copper are in the original 0.825 g of copper oxide?

Answer 1

Answer:

Copper oxide is a compound of copper and oxygen. Four copper oxide can be formed. These are--A.Copper(I) oxide (cuprous oxide, Cu2O) B.Copper(II) oxide (cupric oxide, CuO) C.Copper peroxide (CuO2) and D.Copper(III) oxide (Cu2O3).

Let, in this question copper oxide is CuO.

Moles of CuO = massmolar mass = 0.825g79.545g/mol = 0.0104molmassmolar mass = 0.825g79.545g/mol = 0.0104mol

The ratio of Cu and O is 1:1.

So, moles of Copper present = moles of copper oxide = 0.0104mol

Therefore,0.0104mol of copper are in the original 0.825 g of copper oxide.

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