Question

You have 0.21 moles of Al how many atoms do you have

Answer 1

Number of atoms : 1.26 x 10²³

Further explanation

The mole is the number of particles(molecules, atoms, ions) contained in a substance

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

0.21 moles of Al, so n = 0.21

Number of atoms :

`\tt N=0.21* 6.02* 10^(23)\\\\N=1.26* 10^(23)`