Question

Calculate the number of atoms in 0.2 mole of sodium (Na).

Answer 1

We know that 1 mole of atoms contains 6.022 x 10²³ atoms.

Now,

1 mole of sodium atoms = 6.022 x 10²³ atoms. So,

0.2 mole of sodium atoms = 6.022 x 10²³ x 0.2 atoms

= 12.044 x 10²² atoms

Thus, 0.2 mole of Sodium element has 12.044 × 10²² Atoms in it.