Question

How Many Particles are present in 1mole of a substance? ​

Answer 1

6.022×10^23 - this is your answer

Answer 2

in science, we have a name for this, called Avogadro's number, and it describes the number of representative particles in one mole of a substance.

Avogadro's number is

6.022×1023 l mol−1

−−−−−−−−−−−−−−−−−

The inverse mole unit tells us there are

6.022×1023

particles of something *per mole*.

The official definition of the mole is the quantity that describes the number of elementary entities as there are atoms in

12

g

of isotopically pure carbon-12.

From this definition, we see that

1

mol of pure

12 C

has a mass of exactly 12

g

. The mass of a substance in one mole of that substance is called the molar mass of that substance.

To find the number of moles of a substance present, we divide the mass of the substance by its molar mass, which we see from the definition of molar mass:

molar mass=mass mol

mol=mass molar mass