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In balancing chemical equations, why is it often useful to balance an element that appears in only one compound on each side before balancing elements that appear in several compounds?
ABecause such elements do not affect the reaction rate
BBecause they are always metals
CBecause changing their coefficients is less likely to disturb several parts of the equation
DBecause they must always have coefficient 1
Answer & Solution
Correct answer: C. Because changing their coefficients is less likely to disturb several parts of the equation
When an element appears in only one reactant and one product, adjusting coefficients for it is simpler and causes fewer knock-on changes. Elements present in several compounds are usually handled later because balancing them first can disturb multiple atom counts.
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