What is the mass of gasoline (roe=0.680g/cm^3) in a 94.6Liter gasoline tank??

Answer 1

1 liter = 1,000 cc; therefore mass = rho V = .68 g/cc * 1,000 cc/L * 94.6 L = 680 * 94.6 g = mass. You can do the math.

The important lesson is that mass density (rho = mass/volume) is just a measure of mass per volume. So to find mass, just multiply the density by volume.