Q.
The weight of a molecule of the compound C60H122 is
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a
1.4 × 10−21 g
b
1.09 × 10−21 g
c
5.025 × 1023 g
d
16.023 × 1023 g
answer is A.
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Detailed Solution
Molecular weight of C60H122=12 × 60+122×1 =720+122=842∵ 6 × 1023 molecules of C60H122 has mass = 842 g∴ 1 molecule of C60H122 has mass 8426 × 1023 =140.333 × 10−23 g =1.4 × 10−21 g.
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