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Question

How many atoms of carbon would a young man be giving to his bride-to-be if the engagement ring contains 0.5 carat diamond? (1 carat = 200 mg of C-12)


Correct Answer
A
5.02×1021
Your Answer
B
5.02×1023
Your Answer
C
Avogadro number
Your Answer
D
4.06×1021

Solution

The correct option is A 5.02×1021
Mass of diamond (C)=0.5×200 mg 
=100 mg=100×103 g=0.1 g
Number of moles of C=0.1 g12 g mol1
=1120 mole
Number of C atoms =1120×6.023×1023
=5.02×1021

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