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Question

Al(s)+HCl(aq)AlCl3(s)+H2(g)

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

A
15
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B
14
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C
13
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D
12
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Solution

The correct option is C 13
The balanced equation is:
2Al(s)+6HCl(aq)2AlCl3(s)+3H2(g)
Therefore, the sum of the stoichiometric coefficients in the balanced reaction =2+6+2+3=13

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