In the electrolysis experiment, a current of 19.3 A was passed through the cell for 1 minute 40 seconds. (1 faraday = 96 500 coulombs; 1 mole of gas = 24 dm³ at r.t.p.)

1. aHow many coulombs were passed? [2]
2. bCalculate the number of faradays passed. [1]
3. cCalculate the number of moles of nickel produced. [2]
4. dThe number of moles of oxygen produced at the same time is half the answer above. Calculate the volume of oxygen produced at room temperature and pressure. [2]

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