please solve A&B&C

a) Write a balanced stoichiometric equation for the complete combustion of n- pentane gas (chemical formula of n-C,H.2). b) In a complete combustion reaction, calculate the mass of carbon dioxide (g) produced if we assume that 72 g of n-pentane was burned. c) Calculate the gross or higher heating value for the oxidation or combustion of n-pentane in kJ/mol. The standard enthalpy of pentane (@ 25C) is around -146.34 kl/mol