Correct Answer: Option B

Explanation

molar mass of water [7H\(_2\)O] = 7[ 2 * 1 + 16] → 7 * 18 = 126g/mol

molar mass of ZnSO\(_4\).7H\(_2\)O = [65 * 1] + [32 * 1] + [16 * 4] + 7[ 2 * 1 + 16] 

→ 65 + 32 + 64 + 126 = 287g/mol

percentage of water of crystallization = \(\frac{mass of water of crystallization}{mass of hydrated compound} * 100%\)

→ \(\frac{126}{287} * 100\) = 43.9

≈ 44%

There is an explanation video available below.

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