Answer:
2.41 x 10²³ particles
Explanation:
Data Given:
no. of moles of KCl = 0.4 mol
no. of particles = ?
Solution:
To find number of particles we use following formula
number of moles = number of particles / Avogadro's number
as we have to find number of particles so rearrange the above equation
no. of particles = no. of moles x Avogadro's number . . . . . . . (1)
Where
Avogadro's number = 6.022 x 10²³ particles per mol
6.022 x 10²³ are number of particles in one mole of a substance. and this quantity is known as Avogadro's number
So,
put values in above equation 1
no. of particles = 0.4 mol x 6.022 x 10²³ (particles/mol)
no. of particles = 2.41 x 10²³ particles
So, 0.4 mol KCl contains 2.41 x 10²³ representative particles
