Propane is burned to provide the heat in many cooking grills. the chemical reaction for this process is shown in the equation below. c3h8 + 5o2 3 co2 + 4h2o + energy what are the products in this chemical reaction?

Propane is a linear alkane of formula C3H8. It is mainly used as fuel (this is the main component of liquefied petroleum gas) in cooking and chemical industry reactions. 
The reaction of its complete combustion by the presence of oxygen is:
C3H8 (gas) + 5O2  ==> 3 CO2 + 4H2O + energy (2220⋅kJ)
As we can see, propane can release carbon dioxide and water as every combustion reaction, and a lot of energy in the form of heat.

Covalent bond is the correct answer