Question

A Review Constants Periodic Table The rate constant for a certain reaction is k = 2.90 X 108-1. If the initial reactant concentration was 0.550 M, what will the concentration be after 16.0 minutes? Express your answer with the appropriate units. View Available Hints) I HÅR O 2 ? Value Units Submit Part B A zero-order reaction has a constant rate of 2.50 X 10-4 M/s. If after 30.0 seconds the concentration has dropped to 2.00 X 10-2M, what was the initial concentration? Express your answer with the appropriate units. ► View Available Hints) LÅ ?

Answer 1

& As the reaction unit is of k is see , the of one-order. Rate law - [A] [A] = [AC] e ka [0.550] 90x -2.90x10 x 16X60 SAJ = 0.550 0.067 [A] = 0.0368 m for zero-Order Reaction Ratelawa [A] { Ao] - kt Texio 2] - [Ar] -2.80 x 10 x 30 Lx102] . Ac] - 7.50x ? 4x152 + 4.50 x 153 - [A]

0.02 & 0.00075 = .02075 - oletto 2075x100 = [A]