Question

what is the molar mass of cl₂? 71.0 g/mol 17 g/mol 89 g/mol 35.5 g/mol

Explanation:

Step1: Find molar mass of Cl atom

The molar mass of a chlorine (Cl) atom is approximately $35.5\ \text{g/mol}$.

Step2: Calculate molar mass of $\ce{Cl_{2}}$

Since $\ce{Cl_{2}}$ has 2 chlorine atoms, we multiply the molar mass of one Cl atom by 2: $2\times35.5\ \text{g/mol} = 71.0\ \text{g/mol}$.

Answer:

A. 71.0 g/mol