Q.

A number of carbon atoms in 1 g of CaCO3  is

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a

6.023×1023

b

3.0125×1022

c

1.204×1023

d

6.023×1021

answer is B.

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Detailed Solution

100g of CaCO3  contains 6.023×1023  Carbon atoms

1 g of CaCO3  contains  x atoms

x=6.023×1023100=6.023×1021  Carbon atoms.

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A number of carbon atoms in 1 g of CaCO3  is