The molar mass of HCl is the sum of the atomic masses of hydrogen (H) and chlorine (Cl).
\[
\text{Molar mass of HCl} = \text{Atomic mass of H} + \text{Atomic mass of Cl} = 1.01 \, \text{g/mol} + 35.45 \, \text{g/mol} = 36.46 \, \text{g/mol}
\]
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