A substance, A, decomposes according to zero-order kinetics from an initial concentration of 1.90 M to 0.420 M in 85.2 seconds. What is the value of rate constant, k?

0.0174 mols-1

Explanation:

In a zero order reaction, the rate of reaction is independent of the concentration of species. This implies that reaction rate does not change with increase or decrease of reactant concentration. This also means that the rate of reaction is equal to the rate constant. The integrated rate law of a zero order reaction gives the formula stated in the answer attached which also was applied to obtain the rate constant

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

-4 on