Look at the four chemical reactions.
reaction 1: nh4oh - nh3 + h20
reaction 2: 2naci 2na + cl2
reaction 3: cao + h20 - ca(oh)2
reaction 4: 2kcio33 - 2kci + 302
which statement identifies the reaction that is different from the rest and explains correctly why it is different?
reaction 3, because a single ion is replaced in a compound
reaction 3, because a single product is synthesized
reaction 4. because two products are synthesized
reaction 4. because two ions are interchanged