Answer
The mass of the fuel is $201\times10^{3}g$
Work Step by Step
1. The density equation is $D=\frac{m}{v}$
2.$Density of Fuel = 0.821 g/cm^{3}$
3. $V= 245 L = \frac{1000 ml}{1 L} = 245,000 ml$
4. Rearrange the density equation for mass. $m=VXD$
5. $m= 245,000 ml \times 0.821 \frac{g}{ml}$
6. The mass of the fuel is equal to $201,145 g$ or $201\times10^{3}g$