Determine the mass in grams of 0.248 gal of hexane. The density of hexane is 0.659 g/mL.

Answer 1

Use the density to find the mass. Use dimensional analysis and the conversion factors that 1 gallon = 3.785 liters and 1 liter = 1000 mls

0.248 gal x 3.785 L / gal x 1000 mls / L = 938.68 mls

938.68 mls x 0.659 g / ml = 618.59 g = 619 g (3 sig. figs.)