Answer
40.58 kg
Procedure
According to data retrieved from the EPA, the average density of gasoline is 6.17 lb/gal.
Using this data we obtain the kilograms as follows:
[tex]14.5\text{ gal}\frac{6.17\text{ lb}}{1\text{ gal}}\frac{1\text{ kg}}{2.2046\text{ lb}}=40.58\text{ kg}[/tex]