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[20.0g" of a magnesium carbonate "],[" s...

[20.0g" of a magnesium carbonate "],[" sample decomposes on hearting to "],[" give carbon dioxide and "8.0g],[" magnesium oxide.What will be the "],[" percentage purity of magnesium "],[" carbonate in the sample? (Atomic "],[" weight of "Mg=24)^(***)]

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