Quite sure it's still being debated as water can change in density. Water at around 4 degrees Celsius is said to be almost exactly 1KG.
1 litre of water is 1 kilogram
This cannot be sensibly answered. A liter is a measure of volume, kilograms is a measure of weight or mass.
1 liter of H2O at 4 degrees C has a mass of exactly 1000 grams 1 liter of H2O at 4 degrees C has a mass of exactly 1 kilogram
That depends on what the liter has in it. -- If the liter of space has air in it, there's roughly 0.0012 kilogram of mass there, but the exact number depends on the temperature and pressure. -- If the liter of space has water in it, there's roughly 1 kilogram of mass there. -- If the liter of space has gold, stones, or lead in it, there are several kilograms of mass there. -- If the liter of space is empty, there's no mass there at all. Units of mass (kilograms) are incompatible with units of volume (litres).
Liters can't be converted to kilograms. Liters measure volume, while kilograms measure mass.
The mass of 1 liter of water is approximately 1 kilogram. To convert this to newtons, you would multiply the mass in kilograms by the acceleration due to gravity, which is about 9.81 m/s^2. So, the weight of 1 liter of water is approximately 9.81 newtons.
Mercury has a density of 13,6 grams per cubic centimeter. One liter has 1000 cubic centimeters One kilogram has 1000 grams 13,6 * 1000 / 1000 = 13,6 kilograms per liter One liter of mercury has a mass of 13,6 kilograms
A liter is a unit of volume, not of weight or mass. You can convert a liter to mass units (kilograms) for a specific substance, if you know its density.
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Kilograms and liters really measure different things (mass, versus volume), so there is no general conversion between the two.
The idea is to divide the mass by the volume. If, for example, the mass is in kilograms and the volume is in liters, then the density will have the units kilogram/liter.
Kilogram is a unit of mass, second is a unit of time, litre is a unit of volume !