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klemol [59]
3 years ago
14

2. An element is a mixture of two isotopes. One isotope has an atomic mass of 34.969 amu and an

Physics
2 answers:
yKpoI14uk [10]3 years ago
7 0

Answer:

0.3567

Explanation:

aliina [53]3 years ago
4 0

Answer: The average atomic mass of an element is 35.67 amu and the unknown element will be chlorine.

Explanation:

Mass of isotope 1 = 34.969 amu

% abundance of isotope 1 = 64.88% = \frac{64.88}{100}=0.6488

Mass of isotope 2 =  36.966 amu

% abundance of isotope 2 = (100-64.88)% = \frac{100-64.88}{100}=0.3512

Formula used for average atomic mass of an element :

\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})

A=\sum[34.969\times 0.6488)+(36.966 \times 0.3512]]

A=35.67amu

Therefore, the average atomic mass of an element is 35.67 amu and the unknown element will be chlorine.

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