(a) Consider the combustion of butane, given below:

2 C₄H₁₀(g) + 13 O₂(g) 8 CO₂(g) + 10 H₂O(g)

If C₄H₁₀(g) is decreasing at the rate of 0.740 mol/s, what are the rates of change of O₂(g), CO₂(g), and H₂O(g)? O₂(g)/t = mol/s CO₂(g)/t = mol/s H₂O(g)/t = mol/s (b) The decomposition reaction given below:

2 NOCl(g) 2 NO(g) + 1 Cl₂(g)

is carried out in a closed reaction vessel. If the partial pressure of NOCl(g) is decreasing at the rate of 299 torr/min, what is the rate of change of the total pressure in the vessel? P_tot /t = torr/min