Answer:
the reaction constant will be k = 45 mg/(L*h)
Explanation:
if the reaction follows a zero order kinetics , then the reaction rate is independent of the concentration and remains constant = k. Then we can take any changes in the concentration to calculate the reaction constant k
k = (final concentration - initial concentration)/ Time = (100 mg/L- 10 mg/L)/ 2 hours = 45 mg/(L*h)
k = 45 mg/(L*h)