(6 points) The rate of formation of ammonia is 0.345 M/s, what is the rate of disappearance of H₂? N2(g) + 3H2(g) → 2NH3(g) 0.173 M/s 0.345 M/s ○ 0.690 M/s 245 M/s 0.518 M/s

The label on a bottle of 3% (by volume) hydrogen peroxide, H2O2, purchased at a grocery store, states that the solution should be stored in a cool, dark place. H2O2decomposes slowly over time, and the rate of decomposition increases with an increase in temperature and in the presence of light. However, the rate of decomposition increases dramatically if a small amount of powdered MnO- is added to the solution. The decomposition products are H2O and O2. MnO2 is not consumed in the reaction. Write the equation for the decomposition of H2O2. What role does MnO2 play? In the chemistry lab, a student substituted a chunk of MnO2 for the powdered compound. The reaction rate was not appreciably increased. WTiat is one possible explanation for this observation? Is MnO2 part of the stoichiometry of the decomposition of H2O2?

(Q84) The photochemical reaction (i.e., the reaction of hydrogen gas and chlorine gas to produce hydrochloric acid is a zero order reaction. If the concentration of Cl2 gas is 0.016 M at 50.5 seconds, and the rate constant at a certain temperature is 0.00562 M/s, what was the initial concentration of Cl2 gas? (2 sf)

(Q81) Hydrogen peroxide decomposes to water and oxygen gas is a first order reaction: 2 H2O2 (aq) --> 2 H2O (1) + O2 (g) If the rate constant at a certain temperature is 0.170 s1 and the initial concentration is 0.763 M, what will the concentration of hydrogen peroxide be after 11.4 seconds? (3 sf)