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A sample containing only CaCo(3) and MgC...

A sample containing only `CaCo_(3)` and `MgCo_(3)` is ignited to CaO and MgO. The mixture of oxides produced weight exactly half as much as the original sample. Calculate the percentages of `CaCO_(3)` and `MgCO_(3)` (by mass) in the sample.

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The correct Answer is:
`CaCO_(3)=28.4%;MgCO_(3)=71.6%`
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