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natta225 [31]
3 years ago
9

Choose the formula for calculating percent composition.

Chemistry
1 answer:
kondor19780726 [428]3 years ago
6 0

Answer:

The equation for percent composition is (mass of element/molecular mass) x 100.

please mark me as a brainlist

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Answer : 0.8663 Kg of chalcopyrite must be mined to obtained 300 g of pure Cu.

Solution : Given,

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  • First we have to calculate the moles of Cu.

\text{ Moles of Cu}=\frac{\text{ Given mass of Cu}}{\text{ Molar mass of Cu}}= \frac{300g}{63.546g/mole}=4.7209moles

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Therefore, 0.8663 Kg of chalcopyrite must be mined to obtained 300 g of pure Cu.


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