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A sample of CaCO(3) has Ca=40%,C=12% and...

A sample of `CaCO_(3)` has `Ca=40%,C=12%` and O=48% . If the law of constant proportions is true, then the mass of Ca in 5g of `CaCO_(3)` from another source will be:

A

2.0g

B

0.2g

C

0.02g

D

20.0g

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The correct Answer is:
A
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