Question

what is the molar mass of chlorine (cl₂) gas?
○ 159.808 g/mol
○ 37.996 g/mol
○ 70.906 g/mol
○ 35.453 g/mol

Explanation:

Step1: Recall atomic mass of Cl

The atomic mass of a single chlorine (Cl) atom is approximately 35.453 g/mol.

Step2: Calculate molar mass of Cl₂

Since chlorine gas is diatomic (\(Cl_2\)), we need to multiply the atomic mass of Cl by 2. So, molar mass of \(Cl_2 = 2\times35.453\space g/mol\).
Calculating \(2\times35.453 = 70.906\space g/mol\).

Answer:

70.906 g/mol