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

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

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