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Q. In the unbalanced chemical equation below $x,y$ and $z$ are coefficient to be determined.
$Fe^{2 +}+xBr_{2} \rightarrow yFe^{3 +}+zBr^{-}$
When the equation is properly balanced what is value of $z$ ?

NTA AbhyasNTA Abhyas 2020

Solution:

$Fe^{2 +}+\frac{1}{2}Br_{2} \rightarrow Fe^{3 +}+Br^{-}$