Mole
1 mol of any chemical substance (atoms, molecules, etc.) contains a number of basic particles equal to the number of atoms contained in 12 g of C_{12}, with the exact value being 1 mol = 6.02214076 \times 10^{23}.
- For example, the number of O atoms contained in 1 mol of O is equal to the number of C atoms contained in 12 g of C_{12}.
- For example, 1 L of H_2O weighs 1000 g, and the relative molecular mass of H_2O is approximately 18, so the mass of 1 mol of H_2O is 18 g. Therefore, 1 L of H_2O contains 1000/18 = 55.56 mol of water molecules.
Osmolality (mOsm)
mOsm is a unit used to express osmotic pressure, representing the millimole amount of non-electrolytes or electrolytes contained in one liter of solution. Specifically, 1 mOsm corresponds to the millimole amount of non-electrolytes or electrolytes in one liter of solution.
For details, see 豪渗摩尔
References
How many particles are in 1 mole? From relative atomic mass to Avogadro’s constant_哔哩哔哩_bilibili