Question

define one mole in terms of mass and number

Answer 1

The mole (symbol: mol) is the base unit of amount of substance in the International System of Units (SI). Thus, for example, one mole of water (H2O) contains 6.02214076×1023 molecules, whose total mass is about 18.015 grams and the mean mass of one molecule of water is about 18.015 daltons.

Answer 2

Mole is the ratio of mass to molecular mass.

• The amount of substance that contains the same number of entities like molecules, mass etc is called a mole.
• Mole is the ratio of the mass of an atom to the molecular mass of that species.
• One mole can be given in terms of the Avagrado number.
• One mole is equal to $6.023×10^{23}$ number of molecules.