1 and 2 please

1. Consider methane-oxygen system. (a) Determine the stoichiometric reaction (b) If the O2 mole fraction in the product is 0.03 determine the equivalence ratio . (c) Would your result change if it was a methane-air system? Explain 2. Answer these questions using only physical concepts. Brief explanations are fine but if you need equations or figures you can identify them in the book (a) Explain the physical (chemical) reason why the maximum specific impulse is achieved only for a particular mixture of oxidizer to fuel (b) Explain why in Table 5-8 of the book the proportion of H and O changes with different combustion (chamber) and exit pressures (c) In Fig. 5.1 for a mixture ratio of 2 of RP1- O2 with =1.24 what are the estimated mixture molecular weight and the specific impulse for frozen case? (d) Using Fig 5.2 of the book verify that these results are correct (requires calculation)