Answer
a. $360000 \text{ C}$
b. $ 2.247 \times 10^{24} \text{ electrons}$
Work Step by Step
a.
Coulomb ($C$) = Ampere.second ($A.s$)
To convert from Ampere.hour ($Ah$) to ($As$)
$$Ah \times 60 \times 60 = As$$
$\therefore 100 Ah = 100 \times 60 \times 60 \, As = 360000 \, As$
$100 Ah = \boxed{360000 \, C}$
b.
Charge of electron $=q = 1.60217 \times 10^{-19} \, C$
Number of electrons $(n) = \dfrac{360000}{q}=\boxed{ 2.247 \times 10^{24} \text{ electrons}}$