decompozition

Question 1

what is decomposition

Answer 1

reacts to a substance and breaks it down to simpler elements or compounds

Question 2

choose the reactions bellow that are decomposition

a) calcium + oxygen -> calcium oxide
b) zinc carbonate -> zinc + carbon dioxide
c) hydrogen peroxide -> water + oxygen
d) aluminium +iodine -> aluminium iodine

Answer 2

b

c