Physics battery voltage question

A 8.5 V battery supplies a 2.0 mA current to a circuit for 2.2 hr
How much charge has been transferred from the negative to the positive terminal?
(answer should be in C)
How much work has been done on the charges that passed through the battery?
(answer should be in J)

THANKS!

Since there's 2E-3 A of current, you can multiply by time (in seconds) to get the total charge. This is because

I = q/t

Or current is the amount of charge per unit time, so

q = It

= (0.002)(7920) = 15.840 C

Also, since work is the same as the amount of energy transferred, we can just find that instead. Power is the amount of energy per unit time, or

P = E/t

To find power we can use

P = IV

= (0.002)(8.5) = 0.017 W

and

E = Pt

= (0.017)(7920) = 134.64 J

Q = I(t) = (2.0E-3)(2.2)(3600) = 15840E-3 amp-sec = 15.84C ANS-1
Power = VI = (8.5)(2.0E-3) = 17E-3 J/s
Energy = P(t) = (17E-3)(2.2)(3600) = 134600E-3 = 135 J ANS-2