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Calculate the atomic mass (average) of chlorine using the following data:

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Calculate the atomic mass (average) of chlorine using the following data:

Cl % Natural
Abundance		 Molar mass
35Cl 75.77 34.9689
37Cl 24.23 36.9659
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Average atomic mass of chlorine

= (0.7577)(34.9689 u) + (0.2423)(36.9659 u)

= (26.49 + 8.96 u) = 35.45 u

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