1.

A lead storage battery consists of a lead anode and a grid of lead packed with lead dioxide as the cathode. The electrolyte taken is 39% H_(2)SO_(4) by mass having a density of 1.294 g mL^(-1). The battery holds 3.5 L of the acid. During the discharge of the battery, the density H_(2)SO_(4) falls from 1.294 g mL^(-1) to 1.139 g mL^(-1) which is 20% H_(2)SO_(4) by mass Q. The number of ampere-hour for which the battery must have been used is

Answer»

2650.5
265.05
26.505
2.6505

Solution :Ampere-hour`=("COULOMBS")/(3600s)=(964178)/(3600)=262.05`


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