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Question

An enzyme contains 5.6% Fe, Calculate the number of Fe atoms present in 1g of the enzyme.

A
12.044×1020
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B
6.022×1020
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C
6.022×1021
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D
none of these
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Solution

The correct option is B
6.022×1020

5.6% Fe 1g enzyme 1×5.6100=56×103g
atomic mass of Fe=56u
56g1 mole atoms
56×103g103 mole atoms
103×6.022×1023=6.022×1020 atoms

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