Answer
$1.7\times10^5C$
Work Step by Step
See equation 17-2. The battery’s stored energy equals the charge it delivers multiplied by its voltage. A watt is a joule per second, so a kWh is a unit of energy.
$$PE=QV$$
$$Q=\frac{PE}{V}=\frac{(16000 W\cdot hr)(3600s/hr)}{340V}=1.7\times10^5C$$