Question

Define mole and give the
formula for number of moles
of a substance.
Your answer​

Answer 1

Answer :-

1) Mole :

• It is a measuring unit for the amount of substance which contains as many entities as contained in 1/12th part of C -12 Isotope .

We can find number of moles as ,

1) When weight of substance is given .

→ Number of moles = Given weight / Molecular weight .

2) When number of particles is given .

→ Number of moles = Number of particles / Avogrado's Number .

3) When volume of gas is given .

→ Number of moles = Volume of gas / 22.4 L .

Answer 2

A mole is that quantity of a substance whose mass in grams is equal in magnitude to the molecular mass of that substance in Dalton's.

The formula to determine the number of moles of a substance is as given below.

Number of moles of a substance (n)= Mass of substance in grams/ Molecular mass of substance.