1.31 g of zinc on heating, that are the area of white zinc oxide. 2,65 g of zinc oxide on reduction with hydrogen gave 2.12 g of zinc. show that these figures are in accordance with the law of constant proportions.
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>>Zinc sulphate contains 22.65 | Chemistry
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Zinc sulphate contains 22.65% Zn and 43.9% H
2
O. If the law of constant proportions is true, then the mass of zinc required to give 40 g crystals will be:
Medium
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Correct option is B)
ZnSO
4
−22.65%Zn 43.9%H
2
O
100g crystal has 22.65 Zn
40g crystal has x Zn
x=
100
40×22.65
=
100
906
=9.06g
Hence, mass of Zinc required is 9.06g.
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