Zinc sulphate contains $22.65$ % of zinc and $43.9$ % of the water of crystallization. If the law of constant proportions is true, then the weight of zinc required to produce $20$ g of the zinc sulphate crystals will be:

45.3

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4.53

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0.453

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453

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Solution

The correct option is D $4.53$ g
Since zinc sulphate contains $22.65$ zinc, hence
Weight of zinc required to produce $100 g$ of zinc sulphate crystals = $22.65 g$
$\Rightarrow$ Weight of zinc required to produce $20 g$ of zinc sulphate crystals= $\frac{22.65}{100} \times 20 = 4.53 g$

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Zinc sulphate contains 22.65% of zinc and 43.9% of the water of crystallization. If the law of constant proportions is true, then the weight of zinc required to produce 20 g of the zinc sulphate crystals will be:

The correct option is D 4.53 gSince zinc sulphate contains 22.65 zinc, henceWeight of zinc required to produce 100 g of zinc sulphate crystals =22.65 g⇒ Weight of zinc required to produce 20 g of zinc sulphate crystals=22.65100×20=4.53 g

Zinc sulphate contains $22.65$ % of zinc and $43.9$ % of the water of crystallization. If the law of constant proportions is true, then the weight of zinc required to produce $20$ g of the zinc sulphate crystals will be:

The correct option is D $4.53$ g
Since zinc sulphate contains $22.65$ zinc, hence
Weight of zinc required to produce $100 g$ of zinc sulphate crystals = $22.65 g$
$\Rightarrow$ Weight of zinc required to produce $20 g$ of zinc sulphate crystals= $\frac{22.65}{100} \times 20 = 4.53 g$