A particular fully charged battery can deliver 
coulombs of charge.
Known quantities:
qBattery = 
Find:
a) The current capacity of the battery in ampere-hours
b) The number of electrons that can be delivered.
a) There are 3600 seconds in one hour. Amperage is defined as 1 Coulomb per second and is directly proportional to ampere-hours.
b) The charge of a single electron is 
The negative sign indicates that the particle delivered will be an electron. Simple division gives the solution:
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