Percentage of Magnesium and Oxygen in samples of MgO obtained by different methods were found to be the same. This proves the law of

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Percentage of Magnesium and Oxygen in samples of MgO obtained by different methods were found to be the same. This proves the law of

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Constant proportions

Reciprocal proportions

Multiple Proportions

Conservation of mass

answer is A.

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Detailed Solution

According to law of constant proportions, the percentage of a given element in a compound is same irrespective of the source from which it is prepared

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