23. What is the rate of change of the concentration of N2O (that is, Δ[N2O]/Δt)? 2 N2O(g) → 2 N2(g) + O2(g)

Question

Dinitrogen monoxide decomposes into nitrogen and oxygen when heated. The initial rate of the reaction is 0.030 M/s.

Answer 1

2N₂O(g) ==> 2N₂(g) + O₂(g)

The rate of change for the [N2O] = ∆[N₂O]/2t = -0.015 M/s (note minus sign)

-∆[N2O]/2t = ∆[N2]/2t = ∆[O2]/t

Question is a little ambiguous because it doesn't state how the rate is measured. Is it 0.030 M/s N2 being formed? Is it 0.03 M/s O2 being formed?