(a) Consider the reaction of hydrogen sulfide with methane, given below:

1 CH₄(g) + 2 H₂S(g) 1 CS₂(g) + 4 H₂(g)

If CH₄(g) is decreasing at the rate of 0.440 mol/s, what are the rates of change of H₂S(g), CS₂(g), and H₂(g)?



H₂S(g)/t = mol/s

CS₂(g)/t = mol/s

H₂(g)/t = mol/s




(b) The decomposition reaction given below:

3 NO(g) 1 N₂O(g) + 1 NO₂(g)

is carried out in a closed reaction vessel. If the partial pressure of NO(g) is decreasing at the rate of 798 torr/min, what is the rate of change of the total pressure in the vessel?



P_tot /t = torr/min