Think about solving problems:
A cube is a unit of volume and a kilogram is a unit of weight. They cannot be directly converted. To know the density of an article, one side usually refers to one cubic meter.
For example:
1 and 1 m3 of water are equal to 1000 kg, 1 kg is 1 kg, 1000 kg is 1000 kg, which is 1 ton.
2. 1 standard cubic meter of natural gas weighs about 0.0.7 kg.
Cubic meter, pronounced as lì fāng mǐ, is the unit of volume, with the symbol m? ((Unicode encoding of this character is 33A5)), which is equal to the volume of a cube with one meter on one side and one cubic meter.
Kilogram (symbol kg) is the basic unit to measure quality in the international system of units, and it is also one of the most commonly used basic units in daily life. One kilogram is defined as the mass of the international kilogram original device, which is almost as heavy as one liter of water. The kilogram is the only basic unit prefixed by the international system of units, and it is also the only international unit still defined by artificial products (other units are defined by basic physical characteristics, which is convenient for different laboratories to copy).
References:
Baidu Encyclopedia-cubic meters? Baidu encyclopedia -kg