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Question

The number of gram-molecule of oxygen which contain 6.02×1024 CO molecules is

A
10 g molecule
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B
5 g molecule
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C
1 g molecule
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D
0.5 g molecule
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Solution

The correct option is B 5 g molecule
Number of oxygen atoms = Number of CO molecules =6.022×1024
Number of oxygen molecule
=12×number of oxygen atoms=12×6.022×1024=3.011×1024
Number of gram molecule of O2 molecules
=3.011×10246.022×1023=5 g molecule

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