The moles of Cu reacted in excess oxygen is: mass / atomic mass of Cu = 0.01 mol.

The moles of copper oxide formed will be some fraction (half, third, quarter, etc.) of 0.01 mol, depending on how the formula balances. Let’s call the big stochiometric coefficient in front of copper oxide ‘n’.

The moles of copper oxide is therefore 0.01 x n, and the formula mass of copper oxide must be: mass / mol... more

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Calem Curreen
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