the value the relative abundance of two rubidium isotopes of atomic weight 85 and 87 are 75 and 25% respectively the average weight of rubidium is
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Answered by
41
Answer:
85.50
Explanation:
There are two isotopes...
Let's us consider these two isotopes as
M1& M2 respectively.
M1=85, X1=75% (X denotes relative abundance)
M2=87, X2=25%
We know that,
Average Atomic Mass=M1X1+M2X2/X1+X2
(85×75)+(87×25) /75+25
=(6375) + (2125) /100
=8550/100
=85.50
Hence, the average weight of Rubidium is 85.50
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