103. Solving a chemistry problem
60. A weighed sample of 0.1535 g of magnesium oxide was dissolved in 40.00 ml of hydrochloric acid with a titer of 0.003646 g/ml. For titration of excess acid, 7.50 ml of NaOH with a titer of 0.004040 g/ml were used. Calculate the percentage of MgO in the sample.
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