How many moles of chlorine (cl) atoms are in a sample of 1.72 × 1022 atoms? 0.0286 mol cl 35.0 mol cl 1.03 × 1023 mol cl 1.04 × 1046 mol cl

Given information : Sample of

We need to find the moles of Chlorine in the given sample.

We can say that we need to find moles from the given atoms.

Relation between mole and atom is given by :

Where is Avogadro number.

On solving the above equation , atoms(unit) gets cancelled out and we get 0.0286 mol.

In the given sample the moles of Chlorine (Cl) is 0.0286 mol , so option A is correct.