In 2Mg + O2 -> 2MgO, 4.8 g of Mg is heated with 1.6 g of O2. The mass of MgO formed is (Mg = 24, O = 16)

NEET levelSingle correct optionDifficulty 1 of 3mc185

In $2 Mg + O X_{2} 2 MgO$ , $4.8 g$ of Mg is heated with $1.6 g$ of $O X_{2}$ . The mass of MgO formed is (Mg = 24, O = 16)

n(Mg) = 0.20 mol; n(O2) = 0.05 mol which can oxidise 0.10 mol Mg only. O2 is limiting. MgO = 0.10 mol x 40 = 4.0 g.

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