Propane $($C$3$H$8)$ is burned with air. For each case, obtain the balanced reaction

equation for complete combustion

a$.$ with the theoretical amount of air. $(1,5,3,4,18\mathrm{.}8)$

b$.$ with $20\%$ excess air. $(1,6,3,4,1,22\mathrm{.}56)$

c$.$ with $20\%$ excess air, but only $90\%$ of the propane being consumed in the reaction.

$(1,6,0\mathrm{.}1,2\mathrm{.}7,3\mathrm{.}6,1\mathrm{.}5,22\mathrm{.}56$