Sample of impure cuprite contains 66.6 percent cu percentage of pure cu in sample
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Assume you have 100g of sample. That means you have 66.6 g of Cu.
The number of moles is: 66.6g /63.6 g/mol = 1.05 moles.
Since you have 1 mole of oxygen per 2 moles of Cu, you then have 0.53 moles of oxygen.
The weight of the oxygen is then 0.53 mol X 16 g/mol = 8.42 g.
Add that to the wieght of the copper and you have 75.02 g of Cu2O in 100 g of sample.
That means your sample is 75.02% pure Cu2O
The number of moles is: 66.6g /63.6 g/mol = 1.05 moles.
Since you have 1 mole of oxygen per 2 moles of Cu, you then have 0.53 moles of oxygen.
The weight of the oxygen is then 0.53 mol X 16 g/mol = 8.42 g.
Add that to the wieght of the copper and you have 75.02 g of Cu2O in 100 g of sample.
That means your sample is 75.02% pure Cu2O
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