Question

what is mole concept ?​

Answer 1

Answer:

mole is defined as the amount of substance containing the same number of discrete entities (atoms, molecules, ions, etc.) ... The molar mass of an element (or compound) is the mass in grams of 1 mole of that substance, a property expressed in units of grams per mole (g/mol)

Answer 2

Answer:

The mole concept is a convenient method of expressing the amount of a substance. It primarily focuses on the unit known as a ‘mole’.

Explanation:

A mole is the basic unit of amount of substance. The amount of substance containing Avogadro number of atoms/molecules is called 1 mole. Avogadro number is $6.022 *10^{23}$.

1 mole = $6.022*10^{23}$ entities

Example: 1 mole of carbon-12 has a mass of 12 g and contains $6.022*10^{23}$ carbon-12 atoms.

Number of moles n = $\frac{N}{N_{A} }$

where $N$ = total number of elementary entities in the sample

           $N_{A}$ = Avogadro number

Number of moles can also be defined as:

Number of moles = given mass of the sample/molar mass of the compound