The atomic masses of Cl and I are 35.5 and 12 | vedclass

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(C) According to Dobereiner's law of triads,the atomic mass of the middle element is approximately the arithmetic mean of the atomic masses of the oth

Vedclass · Accepted Answer

$81.25$

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(C) According to Dobereiner's law of triads,the atomic mass of the middle element is approximately the arithmetic mean of the atomic masses of the other two elements in the triad.For the triad $(Cl, Br, I)$:Atomic mass of $Br = \frac{	ext{Atomic mass of } Cl + 	ext{Atomic mass of } I}{2}$Atomic mass of $Br = \frac{35.5 + 127}{2}$Atomic mass of $Br = \frac{162.5}{2} = 81.25$

The atomic masses of $Cl$ and $I$ are $35.5$ and $127$ respectively. According to Dobereiner's law of triads,the atomic mass of $Br$ will be ............ .

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