Essential Chemistry for IGCSE - Chemical Calculations (Section 1 - No. 48)
If 24.0 g of magnesium reacts with 16.0 g of oxygen to produce magnesium oxide (MgO), and only 35.0 g of MgO are actually formed, what is the percentage yield of the reaction?
100%
87.5%
75%
60%
Explanation
The theoretical yield is calculated from the limiting reactant, but the reaction gives 35.0 g of MgO, so the yield is (35.0 / 40.0) * 100 = 87.5%
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