What is the mass, in kilograms, of 14.0 L of gasoline? (Assume that the density of gasoline is 0.680 g/cm^3)

The answer is 9.52 kg.

The density (D) of is quotient of mass (m) and volume (V):

D = m/V

It is given:

m = ?

D = 0.680 g/cm³

V = 14 L = 14 d m³ (1 L = 1 dm³) = 14000 cm³

Since D = m/V, then m = D*V

m = 0.680 * 14000

= 9520 g

= 9.52 kg