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Question

Mass of calcium oxide required when it completely reacts with 852 g of P4O10 is:

A
100 g
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B
1008 g
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C
108 g
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D
1050 g
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Solution

The correct option is B 1008 g
The reaction is as follows :
6CaO+P4O102Ca3(PO4)2

1 mole of P4O10 requires 6 moles CaO.

852284 moles of P4O10 require 6×852284 moles CaO =6×852284×56 g CaO.

Therefore, mass of CaO required =1008 g

Hence, the correct option is B

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