Which of the following is a balanced equation? PbO_(2)+underline (2)H_(2)arrow underline (2)Pb+H_(2)O underline (2)Na+underline (2)H_(2)Oarrow underline (3)NaOH+H_(2) CaCO_(3)arrow CaO+CO_(2) CS_(2)+underline (2)O_(2)arrow CO_(2)+underline (2)SO_(2)

The balanced equation is:<br />$CS_{2}+\underline {2}O_{2}\rightarrow CO_{2}+\underline {2}SO_{2}$<br /><br />Explanation:<br />A balanced chemical equation is one in which the number of atoms of each element is the same on both sides of the equation. In the given options, the equation $CS_{2}+\underline {2}O_{2}\rightarrow CO_{2}+\underline {2}SO_{2}$ is balanced because the number of atoms of each element (carbon, sulfur, and oxygen) is the same on both sides of the equation.