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