Six grams each of magnesium and oxygen were allowed to react. Assuming that the reaction is complete, the mass of MgO formed in the reaction is

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42 grams

28 grams

21 grams

10 grams

answer is D.

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Detailed Solution

2gm excess of O2 is givenMg ....limiting reagentO2 ....Excess reagent(2 x 24g) of Mg given (2 x 40g) of MgO6g of Mg given 'X' gram of MgO

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