Question

How many moles of chlorine (Cl) atoms are in a sample of 1.72 x 1022 atoms?

Answer 1

to convert atoms to moles, we need Avogadro's number.

1 mol= 6.02 x 10^23 atoms

1.72 x 10^22 atoms (1 mol/ 6.02 x 10^23)= 0.0286 moles

Answer 2

Answer: 0.027 moles of Chlorine atoms are present in a sample of
`1.72* 10^(22)` atoms.

Explanation: According to the mole concept,

1 mole has
`6.022* 10^(23)` number of atoms.

So,
`1.72* 10^(22)` atoms will have
`=(1mol)/(6.022* 10^(23)atoms)* 1.72* 10^(22)atoms=0.027moles`

Hence, 0.027 moles of Chlorine atoms will be present.