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From 200 mg of CO(2) when x molecules ar...

From 200 mg of `CO_(2)` when x molecules are removed, `2.89 xx 10^(-3)` moles of `CO_(2)` are left. x will be

A

`10^(20)` molecules

B

`10^(10)` molecules

C

21 molecules

D

`10^(21)` molecules

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The correct Answer is:
D
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