(A) The rate constant for a zero order reaction A → P is 0.0030 mol L^-1 s^-1. How long will it take for the initial concentration of A to fall from…

Rate = −𝟏 ∆[𝑵𝑯𝟑] 𝟐 ∆𝒕 = ∆[𝑵𝟐] ∆𝒕 = +$\displaystyle 1$ ∆[𝑯𝟐] 𝟑 ∆𝒕 −𝟏 ∆[𝑵𝑯𝟑] 𝟐 ∆𝒕 = ∆[𝑵𝟐] ∆𝒕 = + 𝟏 ∆[𝑯𝟐] 𝟑 ∆𝒕 = k ∆[𝑵𝟐] ∆𝒕 = $\displaystyle 2.5$ x $\displaystyle 10$-$\displaystyle 4$ mol L-$\displaystyle 1$ s-$\displaystyle 1$ ∆[𝑯𝟐] ∆𝒕 = $\displaystyle 3$ x $\displaystyle 2.5$ x $\displaystyle 10$-$\displaystyle 4$ = $\displaystyle 7.5$ x $\displaystyle 10$-$\displaystyle 4$ mol L-$\displaystyle 1$ s-$\displaystyle 1$