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Why are coefficients changed instead of chemical formulae while balancing equations?

Answer and explanation

Correct answer: Because changing formulae changes the substance

Balancing follows the law of conservation of mass: the number of atoms of every element must be equal on both sides. A chemical formula represents the fixed composition and identity of a substance, so changing its subscripts would create a different substance. Coefficients change only the number of molecules or formula units. Therefore option A is correct; the other statements misunderstand formulae or coefficients.

Related tags

ScienceClass-10Balancing-EquationsChemical-FormulaeChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourClass 10 Mcq

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