A container holds 5 liters of water. What is the mass of the water in kilograms the density of water is 1.0gcm3?

m = dV (d for density (even though greek letter rho should be used))

therefore m = (1.0 g/cm3)(5 L)
m = (1.0 g/cm3)(5 dm3) (since 1 L = 1 dm3)
m = (1.0 g/cm3)(5000 cm3) (since 1 dm3 = 1000 cm3)
m = 5000 g
m = 5 kg

2,000 cm³