How much copper is present in $50 g$ of $C u S O_{4}$ ?

19.90 g

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39.81 g

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63.5 g

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31.71 g

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Solution

The correct option is A $19.90 g$
Molar mass of $C u S O_{4} = 63.5 + 32 + 4 \times 16 = 159.5$ g

159.5 g $C u S O_{4}$ contains 63.5 g Cu

50 g $C u S O_{4}$ will have $= \frac{63.5}{159.5} \times 50 = 19.90 g C u$

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