High School

The molar mass of Cl to the nearest 0.01 g/mol is __________ g/mol.

A. 35
B. 35.5
C. 35.45
D. 71.0

Answer :

Final answer:

The molar mass of Chlorine (Cl) is approximately 35.5 g/mol. This is calculated as the weighted average molar mass of its two natural isotopes, 35Cl and 37Cl.

Explanation:

The molar mass of Chlorine (Cl) can be determined from the periodic table. The atomic mass is given as 35.5 u (atomic mass units), which equates to 35.5 g/mol in terms of molar mass. While different isotopes of Chlorine exist - 35Cl and 37Cl - natural chlorine is a mixture of both, with about 75.76% being 35Cl and 24.24% being 37Cl. The weighted average of these isotopes gives us a molar mass of approximately 35.5 g/mol.

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