Answer:
Number of atoms = 1.20 * 10^23
Explanation:
To calculate the atoms
Let's find the number of mole
n = m/Mm
n = 6.40/32.065
n = 0.1996mole
The number of mole multiples by avogadros number
Avogadros number = 6.02 * 10^23
Number of atom = 0.1996 * 6.02 * 10^23
= 1.20 * 10^23 atoms
