SAT II Chemistry : Balancing Equations

Study concepts, example questions & explanations for SAT II Chemistry

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Example Questions

Example Question #5 : Stoichiometry

When the equation for the reaction shown below is balanced with the lowest whole-number coefficients, what is the sum of the coefficients of the reactants?

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Possible Answers:

Correct answer:


The coefficients of the equation, when balanced, should be 2, 13, 10, and 8. This problem wants to know the sum of the reactants, so only the coefficients on the left side of the reactants should be added. The sum of 2 and 13 is 15, so 15 is the correct answer.

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