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5g of crystalline salt rendered anhydrou...

5g of crystalline salt rendered anhydrous lost 1.89g of water. The formula weight of the anhydrous salts is 160. The number os water molecules of crystallisation is

A

1

B

2

C

3

D

5

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The correct Answer is:
D
(5-1.89 grams of salt require 1.89 grams of water 160 grams of salt requires ? Grams of water.
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