The decomposition of ammonia on a tungsten surface at 1100 °C NH3 1/2 N2 +3/2 H2 is zero order in NH3. In one experiment, when the initial concentration of NH, was 1.38x102 M, the concentration of NH, dropped to 3.20x103 M after 2.26x10 seconds had passed. Based on these data, the rate constant for the reaction is Ms

A reaction is found to be second-order with a rate constant of 3.45 × 10–5 M–1 s–1. The reaction initially began with 4.354 M reactant. How much reactant remains (in M to two decimal places) after 1 hour?

The decomposition of dinitrogen pentoxide in carbon tetrachloride solution at 30 °C N₂O5 → 2 NO2+ ½2 02 -1 is first order in N₂O5 with a rate constant of 4.10 x 10-3 min If the initial concentration of N₂O5 is 0.921 M, the concentration of N₂O5 will be 0.227 M after min have passed.

For the zero-order decomposition of ammonia on tungsten NH3(g)-->1/2N2(g)+3/2H2(g) the rate constant is 2.08 x 10^-4 mol/L x s. How long will it take for the concentration of ammonia to drop from 1.44 M  to 0.244 M, in hours?