(a) Consider the combustion of ethylene, C2H41g2 + 3 O21g2 ¡ 2 CO21g2 + 2 H2O1g2. If the concentration of C2H4 is decreasing at the rate of 0.036 M>s, what are the rates of change in the...

(a) Consider the combustion of ethylene, C2H41g2 + 3 O21g2 ¡ 2 CO21g2 + 2 H2O1g2. If the concentration of C2H4 is decreasing at the rate of 0.036 M>s, what are the rates of change in the concentrations of CO2 and H2O? (b) The rate of decrease in N2H4 partial pressure in a closed reaction vessel from the reaction N2H41g2 + H21g2 ¡ 2 NH31g2 is 74 torr per hour. What are the rates of change of NH3 partial pressure and total pressure in the vessel?