PLEASE HELP!! CHEMISTRY!!
Only 2&4!

2. When heated, calcium carbonate (CaCO3) decomposes to form calcium oxide and carbon dioxide.

4. Acetaldehyde (CH3CHO) decomposes to form methane (CH4) and carbon monoxide.

Help please and thank you!

PLEASE HELP CHEMISTRY Only 2amp4 2 When heated calcium carbonate CaCO3 decomposes to form calcium oxide and carbon dioxide 4 Acetaldehyde CH3CHO decomposes to f class=