A first order reaction has t1/2 = 13.0 s. How long, in s, does it take...
A first order reaction has t1/2 = 13.0 s. How long, in s, does it take for the reactant concentration to decrease to 1.30 % of its initial value ?
- A.
26
- B.
66
- C.
39
-
D. 81
- E.
53
Homework Answers
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A first order reaction has t1/2 = 13.0 s. How long,
in s, does it take...
A first-order reaction has a half-life of 20.8 s . How long does it take for...
A first-order reaction has a half-life of 20.8 s . How long does it take for the concentration of the reactant in the reaction to fall to one-fourth of its initial value?
Half-life equation for first-order reactions: t1/2=0.693k where t1/2 is the half-life in seconds (s), and k...
Half-life equation for first-order reactions: t1/2=0.693k where t1/2 is the half-life in seconds (s), and k is the rate constant in inverse seconds (s−1). a) What is the half-life of a first-order reaction with a rate constant of 4.80×10−4 s−1? b) What is the rate constant of a first-order reaction that takes 188 seconds for the reactant concentration to drop to half of its initial value? Express your answer with the appropriate units. c)A certain first-order reaction has a rate constant...
1. A certain first order reaction has a rate constant of 0.036 min-1. How much of the reactant will remain if the reacti...
1. A certain first order reaction has a rate constant of 0.036 min-1. How much of the reactant will remain if the reaction is run for 2.5 hours and the initial concentration of the reactant is 0.31 M? 2. A certain first order reaction has a rate constant of 0.036 min-1. How much of the reactant will remain if the reaction is run for 2.5 hours and the initial concentration of the reactant is 0.31 M? 3. The rate constant...
A C If the above reaction follows first order rate, how long does it take for...
A
C
If the above reaction follows first order rate, how long does it
take for 70% of the initial concentration of A to transform to C?
First order rate constant k = 0.0325 s-1.
D Question 7 2 pts How long (in hours) does it take for a first order...
D Question 7 2 pts How long (in hours) does it take for a first order reaction to go from 0.050 M to 0.010 M? Answer to three decimal places. k=2.42 (1/hr) Question 8 2 pts A second order reaction at 443°C has a k-30. with the units appropriate for a second order reaction. How much time (in minutes) does it take for the concentration of the reactant to drop from 0.010M to 0.0050 M? Answer to 1 decimal place.
Referen The initial concentration of the reactant in a first-order reaction A → products is 0.528...
Referen The initial concentration of the reactant in a first-order reaction A → products is 0.528 mol/L and the half-life is 27.0 s. (a) Calculate the concentration of the reactant (in mol/L) 54.0 s after initiation of the reaction. moll (b) How long (in s) would it take for the concentration of the reactant to drop to one eighth its initial value? (e) How long (ins) would it take for the concentration of the reactant to drop to 0.0330 mol/L?...
The half-life of a reaction, t1/2, is the time it takes for the reactant concentration [A]...
The half-life of a reaction,
t1/2, is the time it takes for the reactant concentration [A] to
decrease by half. For example, after one half-life the
concentration falls from the initial concentration [A]0 to [A]0/2,
after a second half-life to [A]0/4, after a third half-life to
[A]0/8, and so on. on. For a first-order reaction, the half-life is
constant. It depends only on the rate constant k and not on the
reactant concentration. It is expressed as t1/2=0.693k For a...
A certain reactant disappears by a first order reaction that has a rate constant K= 3.5x10^-3...
A
certain reactant disappears by a first order reaction that has a
rate constant K= 3.5x10^-3 s-1. If the initial concentration of the
reactant is 0.500 M , how long will it take for the concentration
to drop to
0.200 M ?
4. A certain reactant disappears by a first-order reaction that has a rate constant k=3.5 x 10 s. If the initial concentration of the reactant is 0.500 M, how long will it take for the concentration to drop...
The reaction, aA products, is a first order reaction with a rate constant of 1.248...
The reaction, aA products, is a first order reaction with a rate constant of 1.248 x 10-4 s-1 . a. How long (in seconds) does it take for the initial amount of A to decrease by 30%? b. What fraction of reactant remains after 30 minutes? c. What is the half-life for the reaction? d. How long does it take for the initial amount of reactant to decrease by 87.5%?
For a zero order reaction, the initial reactant concentration is 0.84 M and after 26 s...
For a zero order reaction, the initial reactant concentration is 0.84 M and after 26 s the concentration is 0.68M. Approximately how many seconds after the start of the reaction does it take for the reactant concentration to decrease to 0.21 M? a. 40s b. 603s c. 102s d. 80s e. 120s Please explain what concept/equation used to get the answer.
A
C
If the above reaction follows first order rate, how long does it
take for 70% of the initial concentration of A to transform to C?
First order rate constant k = 0.0325 s-1.
D Question 7 2 pts How long (in hours) does it take for a first order reaction to go from 0.050 M to 0.010 M? Answer to three decimal places. k=2.42 (1/hr) Question 8 2 pts A second order reaction at 443°C has a k-30. with the units appropriate for a second order reaction. How much time (in minutes) does it take for the concentration of the reactant to drop from 0.010M to 0.0050 M? Answer to 1 decimal place.
Referen The initial concentration of the reactant in a first-order reaction A → products is 0.528 mol/L and the half-life is 27.0 s. (a) Calculate the concentration of the reactant (in mol/L) 54.0 s after initiation of the reaction. moll (b) How long (in s) would it take for the concentration of the reactant to drop to one eighth its initial value? (e) How long (ins) would it take for the concentration of the reactant to drop to 0.0330 mol/L?...
The half-life of a reaction,
t1/2, is the time it takes for the reactant concentration [A] to
decrease by half. For example, after one half-life the
concentration falls from the initial concentration [A]0 to [A]0/2,
after a second half-life to [A]0/4, after a third half-life to
[A]0/8, and so on. on. For a first-order reaction, the half-life is
constant. It depends only on the rate constant k and not on the
reactant concentration. It is expressed as t1/2=0.693k For a...
A
certain reactant disappears by a first order reaction that has a
rate constant K= 3.5x10^-3 s-1. If the initial concentration of the
reactant is 0.500 M , how long will it take for the concentration
to drop to
0.200 M ?
4. A certain reactant disappears by a first-order reaction that has a rate constant k=3.5 x 10 s. If the initial concentration of the reactant is 0.500 M, how long will it take for the concentration to drop...
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