Which of the following compound has formula mass of 322 u?
$(H = 1, C = 12, 0 = 16, N a = 23, S = 32, C u = 63.5)$

N a_{2} C O_{3} .10 H_{2} O

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

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N a_{2} C O_{3} .9 H_{2} O

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N a_{2} S O_{4} .10 H_{2} O

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Solution

The correct option is D $N a_{2} S O_{4} .10 H_{2} O$
${N a}_{2} {C O}_{3} .10 H_{2} O = 286 u {C u S O}_{4} . {5 H}_{2} O = 249.5 u {N a}_{2} {C O}_{3} . {9 H}_{2} O = 268 u {N a}_{2} {S O}_{4} .10 H_{2} O = 322 u$

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Similar questions

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

C u

=

H

=

O

=

S

=

1 \times 10^{22}

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

(C u = 63.5, S = 32)

Find the percentage of water of crystallisation in $C u S O_{4} .5 H_{2} O .$ (At. Mass $C u - 64, H = 1, O = 16, S = 32$ )

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

Na—14.31 %	S—9.97 %
H—6.22 %	O—69.5 %.

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