6. Which one of these is a balanced equation for the reaction between methane (CH4) and Oxygen (02)
CH4+ 2(O2) =Co2 + 2(H2O)
4(CH2)+ 02= CO2 + 4(H2O)
2(CH4) + O2 = 2 (CO2) + H2
CH4 + O2 = CO2 + H2O
7. What two useful things are created by combustion?
Sugar and oxygen
Heat and light
Carbon dioxide and energy
Hydrogen and carbon
8. A combustion reaction is when a substance reacts with…
Carbon dioxide
Methane
Oxygen
Hydrogen
9. On heating copper carbonate ( a green crystal) a black powder ( copper oxide) is formed. This equation is copper carbonate’= copper oxide +carbon dioxide. This is ana example of
