Balance this reaction: underline ( )NH_(3)+underline ( )H_(2)SO_(4)arrow underline ( )(NH_(4))_(2)SO_(4)? 211 1,22 21,2

To balance the chemical equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.Given equation: Step 1: Balance the nitrogen atoms.There is 1 nitrogen atom on the left side and 2 nitrogen atoms on the right side. To balance the nitrogen atoms, we need to put a coefficient of 2 in front of NH3. Step 2: Balance the hydrogen atoms.There are 6 hydrogen atoms on the left side and 8 hydrogen atoms on the right side. To balance the hydrogen atoms, we need to put a coefficient of 1 in front of H2SO4. Step 3: Balance the sulfur atoms.There is 1 sulfur atom on the left side and 1 sulfur atom on the right side. The sulfur atoms are already balanced. The balanced chemical equation is: Therefore, the correct answer is: 2, 1, 1.