In a laboratory, you determine that the density of a certain solid is 5.23× 10 −6 kg/m m 3 . convert this density into kilograms per cubic meter. notice that the units you are trying to eliminate are now in the denominator. the same principle from the previous parts applies: pick the conversion factor so that the units cancel. the only change is that now the units you wish to cancel must appear in the numerator of the conversion factor.