Which response includes all of the following that are combination reactions, and none that are not combination reactions? LiO2 + CO2 → Li2CO3 Cl2 +2NaBr→Br2 +2NaCl HNO3 + KOH → KNO3 + H2O SO3 + H2O → H2SO4
1. Z1, Z2 and Z4 only
2. Z1 and Z4 only
3. Z1, Z3 and Z4 only
4. Z1 and Z2 only
5. Another reaction or another combination
the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.
i believe it is a.) released into