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In the balanced chemical equation for burning magnesium, \(2\mathrm{Mg}+\mathrm{O}_2\rightarrow2\mathrm{MgO}\), how many magnesium atoms are on the reactant side?

Answer and explanation

Correct answer: Two

In the balanced equation \(2\mathrm{Mg}+\mathrm{O}_2\rightarrow2\mathrm{MgO}\), the coefficient of \(\mathrm{Mg}\) is 2, so there are 2 magnesium atoms on the reactant side. Since \(\mathrm{O}_2\) contains 2 oxygen atoms, \(2\mathrm{MgO}\) is required on the product side; therefore, 1 magnesium atom would not balance the equation.

Related tags

ScienceClass 10Chemical ReactionsBalancing EquationsMagnesium Combustion

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