Question

he average atomic mass of a sample of an element X is 16.2 .u what are the percentage of isotopes 8X16 and 8X18 in the sample​

Answer 1

Explanation:

Let the percentage of 16/8 X be A %. Then the percentage of 18/8X be (100−A) %.

∴ 16× A/100 +18× 100-A/100 =16.2

⟹1800−2A=1620

⟹A=90

So the answer is 90% 16 X and 10% 18X

8. 8

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