Question

what is the weighted average mass?

Answer 1

To calculate the average mass, first convert the percentages into fractions (divide them by 100). Then, calculate the mass numbers. The chlorine isotope with 18 neutrons has an abundance of 0.7577 and a mass number of 35 amu.

Answer 2

Answer:

HERE YOUR ANSWER IS

Explanation:

An element's atomic mass is the weighted average of the masses of the isotopes of an element. An element's atomic mass can be calculated provided the relative abundances of the element's naturally occurring isotopes and the masses of those isotopes are known.

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