Chlorine has isotopes of 34.98 u (75.4%) and 36.98 u (24.6%). What is its average atomic mass?
A35.98 u
B35.47 u
C36.47 u
D35.00 u
Answer & Solution
Correct answer: B. 35.47 u
The weighted average (75.4 x 34.98 + 24.6 x 36.98)/100 comes to 35.47 u.
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