Calculate the number of atoms in 0.134 g cl?

= 2.227 × 10^21 atoms

0.134 g of Cl

1 mole of Cl atom = 35.5 g

Moles of Cl = 0.134 g/35.5 g

                   = 0.003775 Moles

But; 1 mole = 6.02 × 10^23 atoms

Number of Cl atoms;

= 6.02 × 10^23 × 0.003775

= 2.227 × 10^21 atoms

since electrons are negative the answer is neagtaive