$A l (s) + H C l (aq) \to A l C l_{3} (s) + H_{2} (g)$

The sum of the stoichiometric coefficients of the reactants and the products in the balanced reaction is:

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Solution

The correct option is C 13
The balanced equation is:
$2 A l (s) + 6 H C l (aq) \to 2 A l C l_{3} (s) + 3 H_{2} (g)$
Therefore, the sum of the stoichiometric coefficients in the balanced reaction $= 2 + 6 + 2 + 3 = 13$

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