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Atomic Mass and Atomic Mass Unit

Chlorine cons...

Question

Chlorine consists of 75% chlorine-35 and 25% chlorine-37. Calculate the average atomic mass.

A

35.9

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B

35.5

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C

35.2

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D

36.1

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Solution

The correct option is B 35.5
Average atomic mass is given by:

$M_{a v} = \frac{35 \times 0.75 + 37 \times 0.25}{0.75 + 0.25} = 35.5 g m / m o l$

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Similar questions

Q. Natural chlorine contains chlorine in the form of the isotope

^{35} C l (75.5

^{37} C l

(24.5%). Calculate the average atomic mass of natural chlorine.

Q. Chlorine occurs in nature in two isotopic forms, with masses 35 u and 37 u in the percentage occurance of 75% and 25% respectively. What is the average atomic mass of chlorine atom?

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

	% Natural Abundance	Molar Mass
$^{35} C l$	75.77	34.9689
$^{37} C l$	24.23	36.9659

Q. Natural chlorine consists of

^{35}

^{37}

Cl . Their atomic masses are

34.97

36.97

amu, respectively. If the average atomic mass of chlorine is

35.5

amu , the abundance of

^{35}

Q. Chlorine has two stable isotopes: Cl-35 and Cl-37 with atomic masses 34.96 and 36.95, respectively. If the average mass of chlorine is 35.43, calculate the percentage abundance.

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