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Question

The percentage of P2O5 in diammonium hydrogen phosphate, [(NH4)2HPO4] is:

A
23.48
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B
46.96
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C
53.78
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D
71
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Solution

The correct option is D 53.78
Molar mass of P2O5 is given by =
= 62 + 80
= 142g

So, percentage of P2O5 is

=142×1002×132

=142×100264
= 53.78%

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