Butene, C4H8\text{C}_4\text{H}_8C4H8, reacts with chlorine, Cl2\text{Cl}_2Cl2, in an addition reaction.
Which is the balanced symbol equation for this reaction?
C4H8+Cl2→C4H7Cl+HCl\text{C}_4\text{H}_8 + \text{Cl}_2 \rightarrow \text{C}_4\text{H}_7\text{Cl} + \text{HCl}C4H8+Cl2→C4H7Cl+HCl
C4H8+2Cl2→C4H8Cl4\text{C}_4\text{H}_8 + 2\text{Cl}_2 \rightarrow \text{C}_4\text{H}_8\text{Cl}_4C4H8+2Cl2→C4H8Cl4
C4H8+Cl2→C4H8Cl2\text{C}_4\text{H}_8 + \text{Cl}_2 \rightarrow \text{C}_4\text{H}_8\text{Cl}_2C4H8+Cl2→C4H8Cl2
C4H8+2Cl2→C4Cl8+4H2\text{C}_4\text{H}_8 + 2\text{Cl}_2 \rightarrow \text{C}_4\text{Cl}_8 + 4\text{H}_2C4H8+2Cl2→C4Cl8+4H2