Answer:
1.) Cannot be separated
2.) Separates to 2 Hydrogen atoms and an Oxygen atom by Electrolysis
3.) Cannot be separated
4.) Separates to a Carbon atom and 2 Oxygen atoms by Electrolysis
5.) Cannot be separated
Explanation:
2, 3 and 5 cannot be separated into other types of matter because they are ELEMENTS, therefore, pure substances.
