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in the electrolysis of acidified water using platinum electrode,560cm^3 of hydrogen at stp are collected...

in the electrolysis of acidified water using platinum electrode,560cm^3 of hydrogen at stp are collected in 30mins. a)calculate the current required for the evolution of this quantity of hydrogen and if in this experiment 5.5 ampere were passed to liberate 4700cm^3 of oxygen at 740torr at 45°c. b)calculate the time required to set this amount of gas free?
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