At 25°C the half-life for the first-order decomposition of a pesticide solution is 15.0 hrs. (a)...
At 25°C the half-life for the first-order decomposition of a pesticide solution is 15.0 hrs.
(a) Calculate the rate constant for the reaction.
(b) If the starting concentration of pesticide is 0.500 M, what concentration will remain after 120 min at 25°C?
neat handwriting, please!
Homework Answers
Add Answer to:
At 25°C the half-life for the first-order decomposition of a
pesticide solution is 15.0 hrs.
(a)...
at 25 degrees celsius the rate constant for the first order decomposition of a pesticide solution...
at 25 degrees celsius the rate constant for the first order decomposition of a pesticide solution is 6.40x10^-3 min^-1. If the starting concentration of pesticide is 0.0314 M, what concentration will remain after 62.0 min @ 25 degrees celsius? Correct answer is 2.11X10^-2M Can someone please explain how to get this answer?
At 25deg C, the rate constant for the first-order decomposition of a pesticide solution is 6.4...
At 25deg C, the rate constant for the first-order decomposition of a pesticide solution is 6.4 x 10^-3min^-1. If the starting concentration of the pesticide is 0.0314 M, what concentration will remain after 62.0 min at 25deg C?
The decomposition of N2O to N2 and O2 is a first-order reaction. At 730°C the half-life...
The decomposition of N2O to N2 and O2 is a first-order reaction. At 730°C the half-life of the reaction is 3.58 ×103 min. If the initial pressure of N2O is 4.30 atm at 730°C, calculate the total gas pressure after one half-life. Assume that the volume remains constant. ___ atm
2. Answer the following questions by connecting the half-life of each first-order reaction to the rate...
2. Answer the following questions by connecting the half-life of each first-order reaction to the rate constant. a. The rate constant of a first-order reaction is 2.43 × 10–2 min–1. What is the half-life of the reaction? (2 points) b. A first-order reaction has a rate constant of 0.547 min-1. How long will it take a reactant concentration 0.14 M to decrease to 0.07 M? (2 points) c. The half-life of a first-order reaction is 5.47 min. What is the...
The decomposition of A to B is a first-order reaction with a half-life of 29.9 min:...
The decomposition of A to B is a first-order reaction with a half-life of 29.9 min: A → 2B If the initial concentration of A is 0.463 M, how long will it take for the concentration of A to decrease by 21.3 %? 10.3 min 11.4 min 9.58 min 66.7 min 8.84 min
8.) A common garden pesticide decomposes following first-order reaction kinetics. If the half-life of the pesticide...
8.) A common garden pesticide decomposes following first-order reaction kinetics. If the half-life of the pesticide is 12 years, what is the rate constant k for the decomposition reaction? (5 pts) (do NOT forget proper units) In 1/2 0.693 112 1/2 k k k[A]o Answer: k=
In a study of the decomposition of nitrosyl bromide at 10 °C NOBr—+NO+ Br2 the concentration...
In a study of the decomposition of nitrosyl bromide at 10 °C NOBr—+NO+ Br2 the concentration of NOBr was followed as a function of time. It was found that a graph of 1/[NOBr] versus time in seconds gave a straight line with a slope of 1.27 m?s and a y-intercept of 3.98 M? Based on this plot, the reaction is order in NOBr and the rate constant for the reaction is M?? In a study of the decomposition of hydrogen...
The first-order decomposition of hydrogen peroxide has a half-life of 10.7 h at 20°C. a. What...
The first-order decomposition of hydrogen peroxide has a half-life of 10.7 h at 20°C. a. What is the rate constant (expressed in hr−1) for this reaction? _____________ Write answer to three significant figures and NO UNITS in answer. b. If you started with a solution that was 7.5 × 10−3 M H2O2, what would be the concentration of H2O2 after 3.3 h? __________
The decomposition of nitramide in aqueous solution at 25°C NH2NO2(aq) N2O(g) + H2O(1) is first order...
The decomposition of nitramide in aqueous solution at 25°C NH2NO2(aq) N2O(g) + H2O(1) is first order in NH NO2 with a rate constant of 4.70x10-55-1 If the initial concentration of NH_NO2 is 0.902 M, the concentration of NH2NO2 will be M after 45290s have passed In a study of the gas phase decomposition of dinitrogen pentoxide at 335 K N205(8) +2 NO2(g) + O2(g) the concentration of N2O5 was followed as a function of time It was found that a...
6. Consider the reaction 3A C. If the reaction is second order with a half-life of 20.0) hrs. Starting the reaction...
6. Consider the reaction 3A C. If the reaction is second order with a half-life of 20.0) hrs. Starting the reaction with an initial concentration of A as 0.75M, calculate the time required for the concentration to decrease to 0.25M (8 points)
8.) A common garden pesticide decomposes following first-order reaction kinetics. If the half-life of the pesticide is 12 years, what is the rate constant k for the decomposition reaction? (5 pts) (do NOT forget proper units) In 1/2 0.693 112 1/2 k k k[A]o Answer: k=
In a study of the decomposition of nitrosyl bromide at 10 °C NOBr—+NO+ Br2 the concentration of NOBr was followed as a function of time. It was found that a graph of 1/[NOBr] versus time in seconds gave a straight line with a slope of 1.27 m?s and a y-intercept of 3.98 M? Based on this plot, the reaction is order in NOBr and the rate constant for the reaction is M?? In a study of the decomposition of hydrogen...
The decomposition of nitramide in aqueous solution at 25°C NH2NO2(aq) N2O(g) + H2O(1) is first order in NH NO2 with a rate constant of 4.70x10-55-1 If the initial concentration of NH_NO2 is 0.902 M, the concentration of NH2NO2 will be M after 45290s have passed In a study of the gas phase decomposition of dinitrogen pentoxide at 335 K N205(8) +2 NO2(g) + O2(g) the concentration of N2O5 was followed as a function of time It was found that a...
6. Consider the reaction 3A C. If the reaction is second order with a half-life of 20.0) hrs. Starting the reaction with an initial concentration of A as 0.75M, calculate the time required for the concentration to decrease to 0.25M (8 points)
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago