Question

The element chlorine has two naturally occurring isotopes. About 75% of chlorine isotopes are Cl-35 and about 25% are Cl-37.

Answer 1

ur answer i would beileve is a

Answer 2

Answer:

A) 35.45 amu

Explanation:

Average molar mass is given as

$M_{avg} = \frac{n_1M_1 + n_2M_2}{n_1 + n_2}$

here we know that

$n_1 = 0.75$

$M_1 = 35$

$n_2 = 0.25$

$M_2 = 37$

now we have

$M_{avg} = \frac{0.75(35) + 0.25(37)}{0.75 + 0.25}$

$M_{avg} = 35.5$