Question

if an element m has 2 isotopes m40,m42 the average atom is 41.2 calculate percentage of abundance of both the isotopes​

Answer 1

Answer:

Average Atomic weight = F

1

M

1

+F

2

M

2

+...F

n

M

n

F

1

,F

2

,F

3

...F

n

are percentage fraction.

M

1

,M

2

,M

3

...M

n

are molecular weight of isotope.

51.7=x×(50)+(1−x)52

51.7=50x+52−52x

−2x=−0.3

x=

2

0.3

x=0.15

Abundance of M

50

in nature is 15%

and Abundance of M

52

in nature is 85%

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