4. (5 points) Methane (CH4) is the main component of natural gas or biogas and combusts in air as follows, CH4(g)+2O2(g)CO2(g)+2H2O(l)H=819.5kJ A. How does the burning of methane cause NO to form? B. How much energy (in kJ ) is associated with the reaction of burning 5.00g of CH4 with 9.00g O2 ? (Hint: this is a limiting reactant problem)