3.) underline ( )CH_(4)+underline ( )O_(2)arrow underline ( )H_(2)O+underline ( )CO_(2) 4.) Label the top three reactions using the following word bank based on what type of reaction is shown. Synthesis Decomposition Single Replacement Double Replacement Combustion

3.) The given chemical equation is a combustion reaction. In a combustion reaction, a hydrocarbon (in this case, methane, CH4) reacts with oxygen (O2) to produce water (H2O) and carbon dioxide (CO2). This is a type of chemical reaction where a substance combines with oxygen and releases energy, usually in the form of heat and light.<br />4.) The top three reactions are labeled as follows:<br />- Synthesis: This is a type of reaction where two or more simple substances combine to form a more complex substance. The is A + B → AB.<br />- Decomposition: This is a type of reaction where a complex substance breaks down into its more simple parts. The general form of a decomposition reaction is AB → A + B.<br />- Combustion: This is a type of reaction where a hydrocarbon reacts with oxygen to produce carbon dioxide and water. The general form of a combustion reaction is Hydrocarbon + Oxygen → Carbon Dioxide + Water.