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Step 4: Substitute Coefficients and Verify Result. Count the number of atoms of each element on each side of the equation and verify that all elements and electrons (if there are charges/ions) are balanced. Since there is an equal number of each element in the reactants and products of Mg + 2HNO3 = Mg (NO3)2 + H2, the equation is balanced. glimepiride 5 mg