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Question

The number of oxygen atoms in 6.4 g of oxygen are :

A
6.023×1023
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B
6.023×1022
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C
1.2046×1023
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D
1.2046×1022
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Solution

The correct option is B 1.2046×1023
Number of moles of O2=6.432=0.1 mole
Number of O2 atoms =0.2×6.023×1023=1.2046×1023

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