1×10^22 molecules of Cuso4.5H2o was added to water and 100g solution was obtained % by weight of Cuso4.5H2O in the solution is (Atomic weight of Cu = 63.5)

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Solution

moles of CuSO4.5H2O=10^22/6.02310^23 MASS OF CuSO4.5H20=10^22249.5/6.02310^23 =4.14g ( molar mass of CuSO4.5H2O=249.5) w/w%=4.14100/100=4.14%

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1 \times 10^{22}

C u {S O}_{4} .5 H_{2} O

(C u = 63.5, S = 32)

10^{22}

C u S O_{4} .5 H_{2} O

Z n

3.175

20

Δ H

Z n (s) + C u S O_{4} (a q) ⟶ Z n S O_{4} (a q) + C u (s)

Z n = 65.3

C u = 63.5

[C u S O_{4} .5 H_{2} O]

C u S O_{4} .5 H_{2} O \to C u S O_{4} + 5 H_{2} O

C u = 64, S = 32, O = 16, H = 1

The total weight of $10^{22}$ molecular units of $C u S O_{4} .5 H_{2} O$ is nearly

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