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What are coefficients used for in a chemical equation?

Answer and explanation

Correct answer: To make the number of atoms of each element equal on both sides of the equation

Coefficients are written before chemical formulae and indicate the number of units of each substance involved. They are adjusted to make the number of atoms of every element equal on both sides of an equation, in accordance with the law of conservation of mass. In contrast, changing a subscript within a chemical formula changes the identity of the substance, so option B is incorrect.

Related tags

Chemical EquationsBalancing EquationsStoichiometric CoefficientsConservation Of MassClass 10 Science

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