The reaction of ethene with steam to produce ethanol is represented by the following chemical equation:
C2H4(g)+H2O(g)⇌C2H5OH(g)\text{C}_2\text{H}_4(\text{g}) + \text{H}_2\text{O}(\text{g}) \rightleftharpoons \text{C}_2\text{H}_5\text{OH}(\text{g})C2H4(g)+H2O(g)⇌C2H5OH(g)
How does this equation show that the atom economy for the forward reaction is 100%100\%100%?