Question

Sample of impure cuprite Cu2O contains 66.6% copper what is the percent of CU2O in the sample

Answer 1

Hi friend,

#75.02 g

You want to percentage of CU2O in the sample.

Solution :-

Let , you have 100 of sample which means you have 66.6 g of Cu.

The number of mole is :-

66.6 g / 63.6 g mol/ = 1.05 moles

You have 1 mole of oxigen per 2 moles of Cu. Then you have 0.53 moles of oxigen .

The weight of the oxigen mole is :-

0.53 mol × 16g/mol = 8.42 g

Add this weight to the copper that you have.
So , it will be ( 66.6 + 8.42 ) g = 75.02g

Thus, your sample is 75.02 % pure Cu2O...i hope it helps you

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Answer 2

hope this explaination would be helpfull to u

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