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1(a) sodium and water react to give sodium hydroxide and hydrogen gas, H2 and 1.15 grams of sodium were added to excess oxygen and produced 1.6grams of sodium hydroxide. What was the percentage yield? [7 marks] (b) Copper (II) oxide reacts with sulfuric acid, H2SO4, to give copper (II) sulfate and water and 16grams of copper (II) oxide were added to excess H2SO4 and produced 30grams of copper (II) sulfate. What was the percentage yield? [7marks]
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