The free-radical substitution of ethane with chlorine produces chloroethane.
Which equation represents a propagation step in the mechanism for this reaction?
C2H6+⋅Cl→⋅C2H5Cl+⋅H\text{C}_2\text{H}_6 + \cdot\text{Cl} \rightarrow \cdot\text{C}_2\text{H}_5\text{Cl} + \cdot\text{H}C2H6+⋅Cl→⋅C2H5Cl+⋅H
⋅C2H5+⋅Cl→C2H5Cl\cdot\text{C}_2\text{H}_5 + \cdot\text{Cl} \rightarrow \text{C}_2\text{H}_5\text{Cl}⋅C2H5+⋅Cl→C2H5Cl
⋅C2H5+Cl2→C2H5Cl+⋅Cl\cdot\text{C}_2\text{H}_5 + \text{Cl}_2 \rightarrow \text{C}_2\text{H}_5\text{Cl} + \cdot\text{Cl}⋅C2H5+Cl2→C2H5Cl+⋅Cl
C2H6+Cl2→C2H5Cl+HCl\text{C}_2\text{H}_6 + \text{Cl}_2 \rightarrow \text{C}_2\text{H}_5\text{Cl} + \text{HCl}C2H6+Cl2→C2H5Cl+HCl
