.Answer:
2kclo3 --> 2kcl + 3o2 is a decomposition reaction because it is breaking apart (thinks decompose- to break apart/down)
H2 + I2 --> 2HI is a synthesis reaction because synthesis is like creation/ building
think DNA synthesis or the book of genesis in the bible about creation
2 Na + 2 H20 --> NaOH + H2 --- not balanced at all
other one is a balanced equation- the Zn + 2HCl one
Explanation:
