Please include the process
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1 gallon = 3.78541 L
14.0 gal times (3.78541 L / gal) = 52.99574 L = 52995.74 mL
From Wikipedia, gasoline density ranges from 0.71–0.77 g/mL. Let's use 0.75 g/mL.
52995.74 mL times 0.75 g/mL = 39746.805 g = 39.746805 kg
to three sig figs, 39.7 kg
14.0 gal times (3.78541 L / gal) = 52.99574 L = 52995.74 mL
From Wikipedia, gasoline density ranges from 0.71–0.77 g/mL. Let's use 0.75 g/mL.
52995.74 mL times 0.75 g/mL = 39746.805 g = 39.746805 kg
to three sig figs, 39.7 kg