5000 ml in how many kg?

Answer 1

This question cannot be answered sensibly. A millilitre is a measure of volume, with dimensions [L3]. A kilogram is a measure of mass, with dimensions [M]. Basic dimensional analysis teaches that you cannot convert between measures with different dimensions such as these without additional information.

It takes only a little mental effort to compare a ml of air and a ml of Mercury to see that the two will have very different masses.

Answer 2

The conversion from milliliters (mL) to kilograms (kg) depends on the density of the substance being measured. If you are measuring water, 5000 mL would be equivalent to 5 kg, as 1 mL of water weighs 1 gram.

Answer 3

Kg are units of mass, and ml are units of volume. If you are trying to find out how many grams of a solid are dissolved in 500 ml of a solution, then you need the molarity of the solution.