Can molecular mass be fractional

Fractional atomic mass is the weighted average of all the naturally occurring isotopes of that element.
e.g., fractional atomic mass of chlorine is 35.5.
So, molecular mass of a compound can also be in fraction, when an element which have fractional atomic mass is present in that compound,
e.g., molecular mass of NaCl = 23+35.5 = 58.5

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