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4. 5. In a hydrogen fuel cell, hydrogen and oxygen gases react to produce water vapour. What volume of hydrogen at 40°C and 150 kPa can be burned in a fuel cell using 300 L of oxygen gas measured under the same conditions? (5 marks) Ammonium sulfate fertilizer is manufactured by having sulfuric acid react with ammonia. In the laboratory, a reaction was done using 50.0 mL of sulfuric acid with 24.4 mL of a 2.20 mol/L ammonia solution. What was the concentration of the sulfuric acid solution? (5 marks)
6. 1.63 g of precipitate is collected from a reaction of a silver nitrate solution with 10.0 mL of hydrochloric acid. Calculate the concentration of a hydrochloric acid solution. (5 marks) A 5.95 g sample of AgNO,(s) is reacted with a solution of BaCl,(aq). 4.00 g of precipitate were collected. Calculate the percentage yield for the reaction. (5 marks) 2 AgNO,(s) + BaCl(aq) Ba(NO₂),(aq) + 2 AgCl(s) 1
6.32 g of potassium chlorate reacts according to the reaction given below. Determine the quantity of oxygen produced by the reaction as a mass and as a volume at a 105 kPa and 300 K. (6 marks) KCIO,(s)→ _KCI(s) + O₂(g)