Science, asked by aryan37114, 5 months ago

The percentage of occurance in a sample of 10y5 and 11y5 are 20% and 80% respectively. Find the atomic mass of the element​

Answers

Answered by ItzSecretBoy01
5

Answer:

Refers to above attachment.......

Attachments:
Answered by devroy26780
2

Explanation:

ANSWER

Let the percentage abundance of first isotope be

5

10

B=x

Hence the percentage abundance of second isotope is

5

11

B=100−x.

Avg atomic mass =

100

x×10+(100−x)×11

1080=10x+1100−11x

or, x=20.

Hence the %abundance of the two isotopes are 20 & 80 %.

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