What will be the mass of a substance with a volume of 5 liters, if its density is 1000 times less than that of water?

1) The density of water is 1000 kg / m3. Therefore, if the density of a given substance is 1000 times less than the density of water, then its density is 1 kg / m3 (typical for gases).

2) The volume of the substance is 5 liters. For the convenience of calculations, we will translate the set value into m3: 1 l = 1 dm3 = 10-3 m3; 5 l = 5 * 10-3 m3.

3) Calculate the mass of the substance:

m = ρ * V = 1 * 5 * 10-3 = 5 * 10-3 kg = 5 g.

Answer: The mass of 5 liters of substance is 5 grams.