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Question

A person adds 1.71 gram of sugar (C12H22O11) in order to sweeten his tea. The number of carbon atoms added are (mol. mass of sugar =342)

A
3.6×1022
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B
7.2×1021
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C
0.05
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D
6.6×1022
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Solution

The correct option is B 3.6×1022
Answer:
Sugar is sucrose, which has a formula of C12H22O11 and a molecular weight of 342.

Number of moles of sucrose in 1.71 grams = 0.005

The number of molecules is the product of the number of moles and Avogadro's number

Number of molecules =0.005×6.02×1023

Number of carbon atoms =12×0.005×6.02×1023
=3.6×1022

Option A is the correct answer

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