a. If Δ[NO3] / Δt is -21.51 x 104 mM/min in the following reaction, what is the rate of appearance of NO2?
NO3(g) + NO(g) → 2NO(g)
b. What is the rate of change in [NO2] in the following reaction if Δ[NO3] / Δt is -23.36 x 10-1 mM/min?
2N3(g) → 2NO2(g) + O2(g)