197 1 the 14th international metrology conference stipulated: "Molar is the quantity of a system, and the number of basic units contained in this system is equal to the number of atoms in 0.0 12kg carbon-12. When using moles, you should specify the basic unit, which can be atoms, molecules, ions, electrons and other particles, or a specific combination of these particles. "
Moore is like a bridge, connecting a single particle invisible to the naked eye with a large number of particles that can be weighed. It is very convenient to apply moles in chemical calculation. Mole is the unit to express the amount of matter, and each mole of matter contains Avon Gadereau constant particles. Mole is one of the basic units in the international system of units, which is used to express the amount of matter ... When using mole, you should specify the basic unit, which can be atoms, molecules, ions, electrons and other particles, or a specific combination of these particles. "