The number of gram atoms present in $10$ g of $C a C O_{3}$ is:

5.0

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0.5

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0.0

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0.02

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Solution

The correct option is B $0.5$
The molar weight of calcium carbonate is $100$ g/mol.
Therefore, $10$ g is equal to $0.1$ mole.
$1$ mole of calcium carbonate contains $5$ moles of atoms.
Hence, $10$ g of calcium carbonate contains $0.5$ gram atoms.

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