Because the standard unit for measurement of mass is a kilogram.
1 Kilogram
Half a kilogram is the mass in this case.Half a kilogram is the mass in this case.Half a kilogram is the mass in this case.Half a kilogram is the mass in this case.
A liter of water has approximately a mass of one kilogram.
A kilogram is a measure of mass therefore a kilogram of lead and a kilogram of feathers have the same mass: one kilogram. They would, however, have different volumes and densities.
The kg (kilogram) is the unit of mass in SI.The kg (kilogram) is the unit of mass in SI.The kg (kilogram) is the unit of mass in SI.The kg (kilogram) is the unit of mass in SI.
Weight or mass.
The SI unit for expressing mass is the kilogram (kg).
The SI unit which is used to measure mass is the kilogram.
They both have the same mass. A kilogram measure mass regardless of the material, volume etc.
The mass of a kilogram of snow is 1 kilogram.
The metric standard unit of mass is the kilogram (Kg).
The SI base unit for mass is the kilogram