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Question

How much sugar (C12H22O11) will be required if each person on earth is given 100 molecules of sugar? The population of the earth is 3×1010.

A
170.43×1010g
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B
170.43×1011g
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C
340.86×1011g
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D
340.86×1010g
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Solution

The correct option is B 170.43×1011g
The sugar given to the entire population on earth is 3×1010×102=3×1012 molecules.
One mole (6×1023) molecules of sugar corresponds to 342 g.
Hence, 3×1012 molecules of sugar corresponds to 3×10126×1023×342=170.43×1011 g.
Therefore, sugar required is 170.43×1011 g.

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