Search: A zero-order reaction has a constant rate of 1.70×10&#8722;4 . If after 80.0 seconds the concentration has dropped to 6.00×10&#8722;2 , what was the initial concentration?

Number of results: 55,443

Chem2
A reaction in which A, B, and C react to form products is zero order in A, one-half order in B, and second order in C. If the concentration of C is increased by a factor of 4.95 (and all other concentrations are held constant), how much will the rate of reaction increase?
Monday, May 2, 2011 at 10:11pm by Ryan

Chemistry
The rate constant, k, for each reaction order is equal to _____ from the linear plot. Reaction Order Answer zero ______ first ______ second ______ a. slope (m) b. y-intercept c. x-intercept d. negative of the slope (-m) e. 0 i think zero order is maybe d? not sure
Saturday, November 14, 2009 at 8:04pm by Yo

Chemistry11
1 and 2; C is same, B is same, A doubles and rate stays same; therefore, the reaction is zero order for A. 2 and 3. C is same. A doesn't matter since it is zero order. B doubles and rate doubles; therefore, the reaction is 1st order with in B. 1 and 4. A same. B same. C ...
Sunday, February 17, 2013 at 4:55am by DrBob222

chemistry
In the initial first order reaction, rate = k[substrate concentration] As time passes the enzyme becomes bound with substrate into an enzyme-substrate complex. At this point the rate of product formation depends on the rate of decomposition of the complex and independent of ...
Sunday, September 21, 2008 at 6:14pm by GK

chemistry
The units of a rate constant for zero, first and second order reactions are given in the textbook. If the time units are minutes, what would you expect the units to be for a third order reaction? a. 1/min3 b. mol2/L2-min c. L/mol-min2 d. L2/mol2-min e. L2/mol2-min2 help help! ...
Saturday, February 18, 2012 at 9:19pm by elvis

Chemistry
Well, if the concentration of OH- were near zero, the rate would b...... I agree b is the general answer. ************************* a+b=c rate is =k[a][b] ******************************* However, warning: if a+b=c and b is in great concentration, and remains so during the ...
Sunday, July 3, 2011 at 4:11am by bobpursley

chemistry
how do you solve this problem? consider the reaction A->B the rate of the reaction is 1.6 x 10^-2 M/s when the concentration of A is 0.35 M. Calculate the rate constant if the reaction is a) first order in A and b) second order in A.
Thursday, July 15, 2010 at 1:10am by Jin

Concentration and Reaction
The rate of the following reaction: Radioactive decay of 90Sr, is characterized by the rate constant k = 0.024 year-1. What is the half-life (in years) for this reaction at the same conditions when the initial concentrations are 0.0356 M? (Round your answer to 3 significant ...
Saturday, November 20, 2010 at 10:36pm by Confused

chemistry ASAP please!!
The reaction of CO(g) + NO(g) is second-order in NO2 and zero-order in CO at temperatures less than 500K. (a) Write the rate law for the reaction. (b) How will the reaction rate change if the NO2 concentration is halved? (c) How will the reaction rate change is the ...
Tuesday, March 15, 2011 at 12:39pm by Maria

CHEM- KINETICS
The rate constant for a reaction is 4.65 L mol-1s-1. The overall order of the reaction is: zero first second third I am having trouble with the order of reactions. I dont understand this question. this is an assignment question but i have no idea how to do it.
Saturday, September 25, 2010 at 9:53pm by lucylu

college chemistry
The rate of the following reaction: 2 NO2 2 NO + O2, is characterized by the rate constant k = 0.775 L·mol-1s-1. What is the half-life for this reaction at the same conditions when the initial concentrations are 0.0115 M? (Round your answer to 3 significant figures.) ...
Wednesday, November 10, 2010 at 4:38pm by sparkle

Chemistry
The units for rate of reaction are (M/s). For a first order reaction, rate=(rate constant)*(concentration) Unit analysis: (M/s)=(?)*(M) => Units of a first order rate constant are 1/s.
Friday, February 22, 2008 at 10:51am by Kat

Chemistry
A second order reaction has a rate constant of 8.7x10^-4/(M*s) at 30 degrees C. At 40 degrees C the rate constant is 1.8x10^-3/(M*s). What are the activation energy and frequency factor for this reaction? Predict the value of the rate constant at 4 degrees C
Friday, February 29, 2008 at 11:20pm by Lauren

Chemistry
The reaction 2B--->C + 2D is found to be zero order when run at 990 degrees C. If it takes 3.3X110^2 s for an initial concentration of B to go from 0.50 M to .20 M what is the rate constant for the reaction? what is the half life of the reaction under these conditions?
Friday, February 29, 2008 at 11:18pm by Lauren

chemistry
1) The activation energy of a certain reaction is 35.3 kJ/mol. At 20 degrees C, the rate constant is 0.0130 s^-1. At what temperature would this reaction go twice as fast? Answer in units of degrees Celsius. i think the answer is around 34, but i keep in getting it screwed up...
Tuesday, January 29, 2008 at 4:32pm by Evets

Chemistry - enthalpy and rate constant (check)
22. The rate of a chemical reaction is dependent on its ΔH. Do you agree or disagree with this statement? Briefly justify your answer. I agree with the above statement, enthalpy is defined as the internal energy of the reactants and products therefore the chemical ...
Wednesday, June 8, 2011 at 2:36pm by Farah

chemistry
The rate constant, k, for each reaction order is equal to _____ from the linear plot. Reaction Order Answer zero:___ first: ___ second: ___ a. slope (m) b. y-intercept c. x-intercept d. negative of the slope (-m) e. 0
Thursday, May 10, 2012 at 8:14pm by jen

Chemistry
In a reversible reaction, chemical equilibrium is attained when ? 1. Rate of the forward reaction is greater than the rate of the reverse reaction. 2. Rate of the reverse reaction is greater than the rate of the forward reaction, 3. Concentration of the reactants reaches zero ...
Wednesday, March 9, 2011 at 4:49pm by Jazmin F.

Chemistry
1) The rate expression for the reaction 2 SO2 + O --> 2 SO3 is given by rate = k [SO2]2[O2]. The overall order of this reaction is: first order 2)The rate reaction between A and B is expressed as rate = k [A][B]. To produce the greatest increase in the reaction rate: ...
Sunday, December 23, 2007 at 8:42am by Anonymous

chemistry
The reaction Cl(g)+ O3(g) --> ClO(g)+ O2(g) is the first-order in both reactants. Determine the pseudo-first-order and second-order rate constants for the reaction from the data in the table below if the initial ozone concentration was ..0000000000825 M or 8.25*10^-11 M...
Monday, October 15, 2012 at 9:35pm by Brun

chem
The reaction A + B „³ C + D is second order in A and zero order in B. The value of k is 0.012 M-1 min-1. What is the rate of this reaction when [A] = 0.125 M and [B] = 0.435 M?
Monday, February 11, 2008 at 1:55am by Sarah

chemistry
The reaction A + B --> C + D is second order in A and zero order in B. The value of k is 0.012 M-1 min-1. What is the rate of this reaction when [A] = 0.125 M and [B] = 0.435 M?
Monday, February 11, 2008 at 9:06am by Anonymous

chem
The reaction A + B -> C + D is second order in A and zero order in B. The value of k is 0.012 M-1 min-1. What is the rate of this reaction when [A] = 0.125 M and [B] = 0.435 M?
Monday, February 11, 2008 at 1:55am by Sarah

chemistry
The rate law of the overall reaction. A + B -> C is rate = k[ A ]^2 Which of the following not increase the rate of a chemical reaction? a) increasing the temperature of the reaction b)increasing the concentration of reaction A c)adding a catalyst for the reaction d)...
Thursday, November 18, 2010 at 1:23pm by ben

Chemistry
At a given Temperature, the elementary reaction A<--->B in the forward direction is first order in A with a rate constant of 3.90*10^-2s^-1. The reverse reaction is first order in B and the rate constant is 8.20*10^-2s^-1. What is the value at equillibrium for ...
Monday, March 18, 2013 at 11:06pm by Christina

chemistry
When the reaction is run in a buffer solution, however, it is pseudo-first-order in CH3I. rate = k[CH3] What is the half-life of this reaction in a pH 10.00 buffer if the pseudo-first-order rate constant for this reaction is 7.3 x10-9 s-1?
Friday, June 5, 2009 at 3:00am by anglo

Chemistry
A reaction is first order and it takes 324 minutes for the reaction to be 50.0% complete. How long will it take for the reaction to be 85.0% complete at the same temperature? 2. N2O5 decomposes to N2O4 and O2 and the reaction is first order in N2O5 with a specific rate ...
Saturday, July 17, 2010 at 8:31pm by Lin

Chem
Given the following hypothetical reaction: 2 E(g) + F(g) + G(g) products. If the rate law is: Rate = k[E]2[F]-1, what is the overall order of reaction? 1. a. zero 2. b. first 3. c. second 4. d. third
Saturday, April 24, 2010 at 6:40pm by Mark

Chemistry
Here is a site that gives them. http://en.wikipedia.org/wiki/Reaction_rate_constant#Units Here is how you can do, say zero order and first order. Remember rate of the reaction is measured in M/s. zero order: Rate = k = M/s = (moles/L*s) first order: Rate = k(A) k = rate/(A) k...
Friday, February 15, 2013 at 12:34am by DrBob222

chemistry
A 50-mL Mohr buret is connected to a 1-ft length of capillary tubing. The buret is then filled with water and the volume of water versus time is monitored as the water gradually flows through the capillary tubing. This process is found to be first-order with a rate constant of...
Sunday, May 16, 2010 at 10:36pm by eng

MATH
what is a constant rate of change? That means the velocity changes over time in the same manner. 4,800 +3,700 =4,500 Rate of Change Is Constant You can increase or decrease the amount or concentration of a species by a constant value using a zero order rule. For example, the ...
Tuesday, January 9, 2007 at 4:52pm by Austin

Chemistry
What is the value of the rate constant for a reaction in which 75.0 percent of the compound in a given sample decomposes in 80.0 min? Assume first order kinetics. Use the integrated rate law for a first order reaction. Remember at 75 percent reaction, 25 percent of the ...
Wednesday, September 19, 2012 at 8:22pm by Bryan

chemistry, chemical kinetics
I keep getting these questions wrong, could someone please help. Thanks so much. Question 1 For the following overall reaction, the rate constant is 3.4x10^-2. A(g)+ 2B -> 2C + D What may be the rate reaction? Question 2 The rate law for this reaction is R=k[NO][Cl2] ...
Friday, July 2, 2010 at 8:33pm by student

chemistry
The reaction A + B to C + D is second order in A and zero order in B. The value of k is 1.10×10−2 M^{-1}\;min^{-1}. What is the rate of this reaction when A}]=0.124 M and B}]=3.89 M?
Sunday, February 28, 2010 at 5:34pm by joe

rate constant
A reaction has a rate constant of 1.25×10−4 at 28 and 0.227 at 77. Determine activation barrier for reaction What is the value of the rate constant at 18?
Sunday, February 10, 2013 at 11:55pm by charlie

Rate Laws
If the initial concentration of AB is 0.210 M, and the reaction mixture initially contains no products, what are the concentrations of A and B after 75 s? The reaction is in the second order: rate=k[AB]^2 The rate constant is k=5.4*10^2 M*s I don't understand how to find A...
Saturday, February 20, 2010 at 3:13pm by Kyle

Chem II
The equilibrium constant of a reaction is 12.6. If the rate constant of the reverse reaction is 5.1 x 10 -2 the rate constant for the forward reaction is _____ 0.32 0.16 0.64 0.08 I don't even know where to start on this question. Any direction will help
Monday, June 16, 2008 at 9:57pm by Ken

Chemistry
A first order chemical reaction has a rate constant of 8.7×103 s-1 at 30 °C and a rate constant of 5.8×104 s-1 at 64 °C. Calculate the activation energy, Ea, for the reaction. I keep getting 5.25e-6 kJ/mol but apparently thats not the correct answer. ln(5....
Wednesday, September 29, 2010 at 4:43pm by Anonymous

Chemistry Lab
What would happen to the reaction rate of a solution if 10 mL or more of water is added? Will the reaction rate increase or decrease? The following reaction occurs without a change in the color 2A (g) + B2(g) --- 2AB (g) a) How could you monitor the concentration of the ...
Monday, July 20, 2009 at 11:08pm by Sunshine

chemistry
What is the rate of the following reaction (M/s) if the rate constant for the reaction is 0.500 L•mol-1•s-1 and the concentration of each reactant is 0.0628 M. (The units for the rate constant depend upon the rate law). CO + NO2 --> CO2 + NO
Saturday, November 20, 2010 at 10:35pm by Confused

chem class
rate = k[A]x[B]y Label the experiments above 1,2, and 3. Substitute 2 data and divide by 1 data. You should have the following. 2) 2.83 = k*[0.273]x[1.526]y ---------------------------------------- 1) 2.83 = k*[0.273]x[0.763]y So 2.83/2.83 = 1. k cancels. [0.273]x cancels and ...
Sunday, October 24, 2010 at 4:35pm by DrBob222

chemistry
The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that a. the reaction is zero order b. the reaction is first order c. the reaction is second order d. the reaction starts out first order and changes ...
Saturday, February 18, 2012 at 9:28pm by elvis

Chemistry
A 50-mL Mohr buret is connected to a 1-ft length of capillary tubing. The buret is then filled with water and the volume of water versus time is monitored as the water gradually flows through the capillary tubing. This process is found to be first-order with a rate constant of...
Tuesday, May 18, 2010 at 11:20am by anonymous

chem
The rate data from a chemical reaction shows that doubling the concentration of A with the concentration of B remaining constant causes the rate to increase by a factor of four. What is the reaction order for [A]? a. 0 b. 0.5 c. 1 d. 2 e. 3
Sunday, February 10, 2008 at 8:06pm by Anonymous

chemistry
x + 2y ---> products is first order in c and 2nd order in y. what are the units of K, the specific rate constant, if the reaction rate is expressed in units of moles per liter per sec. I know the answer is M.s^-1^ but I don't understand this concept. could you ...
Sunday, December 12, 2010 at 5:41pm by Audrey

chem class
The data in the table below were obtained for the reaction: A + B → P 3 Experiments 1 (A) (M): 0.273 (B) (M): 0.763 Initial Rate (M/s): 2.83 2 (A) (M): 0.273 (B) (M): 1.526 Initial Rate (M/s): 2.83 3 (A) (M): 0.819 (B) (M): 0.763 Initial Rate (M/s): 25.47 1) The ...
Sunday, October 24, 2010 at 4:35pm by jack ross

chemistry
Given this data in a study on how the rate of a reaction was affected by the concentration of the reactants Initial Rate, RUN #(A, M) (B, M) (C, M) (mol L-1 s-1 1 0.200 0.100 0.600 5.00 2 0.200 0.400 0.400 80.0 3 0.600 0.100 0.200 15.0 4 0.200 0.100 0.200 5.00 5 0.200 0.200 0....
Saturday, February 18, 2012 at 9:18pm by elvis

Chemistry
The following reaction is first order and the rate constant is 2.35 x 10^-4 s^-1 at 20 degress C. 2 N2O5 -----> 2 N2O4 + O2 A.) What is the rate of reaction if the [N2O5]=.25 M? rate = k[N2O5] B. What would the [N2O5] be after 100 s given that the initial [N2O5] was 0....
Tuesday, November 20, 2012 at 11:54am by DrBob222

Chemistry
At a given temperature, the elementary reaction A <=> B in the forward direction is first order in A with a rate constant of 2.60 x 10^-2 s^-1. The reverse reaction is first order in B and the rate constant is 8.50 x 10^-2 s^-1. What is the value of the ...
Monday, March 5, 2012 at 11:37pm by Jessica

Chemistry
1. Generally, the rate is doubled IF the reaction is a first order in that constituent but the problem doesn't state that. About the only thing you can say, and that isn't certain, is that the rate is increased. It will be doubled if the reaction is first order in that...
Sunday, November 18, 2007 at 3:05pm by DrBob222

Chemistry
a certain first order decomposition reaction has a half-life of 15.0 minutes. What is the rate constant for this reaction? what is the time it will take for the reaction to reach the 10% completion point?
Wednesday, October 24, 2012 at 9:02pm by Josh

chemistry-rate of reaction
The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 3.591×10−3 M−1s−1. What is the initial rate of reaction in a...
Sunday, December 2, 2012 at 12:07am by Ron

chemistry
Determine the overall orders of the reactions to which the following rate laws apply: a. rate = k[NO2]^2 b. rate = k c. rate = k[H2][Br2]^1/2 d. rate = k[NO]^2[O2] I think the answers are: a. Second Order b. Zero Order c. First Order for H2 and One-half order for Br2 d. Second...
Sunday, July 18, 2010 at 9:58pm by Sara

chemistry
Choose the correct integrated rate law for each reaction order.? Choose the correct integrated rate law for each reaction order. Reaction Order Answer zero ____ first _____ second _____ a. l/[A]t = kt + l[A]0 b. log[A]t = kt +log[A]0 c. ln[A]t = ï¿½kt + ln[A...
Thursday, May 15, 2008 at 6:57pm by Amy

chemistry
Choose the correct integrated rate law for each reaction order.? Choose the correct integrated rate law for each reaction order. Reaction Order Answer zero ____ first _____ second _____ a. l/[A]t = kt + l[A]0 b. log[A]t = kt +log[A]0 c. ln[A]t = –kt + ln[A]0 d. [A]t = &#...
Thursday, May 15, 2008 at 2:15pm by amy

chemistry
The rate constant, k, for each reaction order is equal to _____ from the linear plot. zero ---d first----d second-----a a. slope (m) b. y-intercept c. x-intercept d. negative of the slope (-m) e. 0
Friday, May 16, 2008 at 7:19pm by Amy

Reaction rates
The reaction, C2H5Br --> C2H4 + HBr, has a rate constant k = 0.0000100 s-1 at 363 °C and k = 0.000479 s-1 at 427 °C. What is the rate constant for the reaction at 725 K? Round your answer to 3 significant figures.
Saturday, November 20, 2010 at 10:37pm by Confused

Chemistry
For the reversible, one-step reaction A + B ARROW C + D, the forward rate constant is 35.9 1/(M·h) and the rate constant for the reverse reaction is 25.4 1/(M·h). The activation energy was found to be 33.0 kJ/mol for the forward reaction and 45.6 kJ/mol for the ...
Wednesday, June 13, 2012 at 9:50pm by parker

Chem1
The reaction N2O5 --> NO3 + NO2 is first-order in N2O5 and has a rate constant of 0.058/s. Calculate the rate of reaction when the concentration of N2O5 is 0.065.
Monday, May 2, 2011 at 10:10pm by Ryan

Chemistry (kinetics)
None of the orders in this reaction were 0 order; however, reactions can be 0 order. Using the idea of a reaction mechanism and rate limiting step, explain how a reaction can be 0 order for a substance.
Wednesday, December 5, 2012 at 9:44pm by Shruti

Chem Class
The data in the table below were obtained for the reaction: A + B → P 3 Experiments 1 (A) (M): 0.273 (B) (M): 0.763 Initial Rate (M/s): 2.83 2 (A) (M): 0.273 (B) (M): 1.526 Initial Rate (M/s): 2.83 3 (A) (M): 0.819 (B) (M): 0.763 Initial Rate (M/s): 25.47 1) The ...
Sunday, October 24, 2010 at 4:20pm by jack ross

chemistry
a first order reaction has a rate constant of 7.5 x 10^-3/s. The time required for th reaction to be 60% complete is
Tuesday, June 17, 2008 at 2:28pm by Angel

Chemistry
A zero-order reaction has a constant rate of 3.20×10^−4 M/s. If after 35.0 seconds the concentration has dropped to 9.00×10^2M , what was the initial concentration?
Friday, April 30, 2010 at 11:28pm by D.Walker

Chemistry
what is the rate of a first-order reaction that has a reactant concentration of 1.1M and a rate constant of 0.14/s?
Wednesday, May 1, 2013 at 1:59pm by George

Chem II
A first-order reaction is 35.5% complete in 4.90 minutes. The rate constant of the reaction is _____
Friday, June 13, 2008 at 5:05pm by Ken

Chemistry
The rate law of a reaction, A-> B+C is given by the expression: Rate=k, where k=0.0113 mol/L min. If the initial concentration of the reactant is 0.225 mol/L, how long does it take for the concentration to decrease to 0.180 mol/L? I know i have to find the order of the ...
Tuesday, September 14, 2010 at 10:39pm by James

chemistry
Nitrogen monoxide reacts with hydrogen gas to form nitrogen gas and water (vapor). Write a balanced equation for this reaction. the reaction is experimentally found to be (approximately) first-order in H2 and second-order in NO. Write down the form of the experimentally-...
Wednesday, April 11, 2012 at 4:59pm by Kenzie

chemistry
3) The reactant concentration in a zero-order reaction was 0.100 M after 125 s and 1.50×10−2 M after 385 s. What is the rate constant for this reaction? What was the initial reactant concentration for the reaction? I found the rate constant to be 3.27 x 10^-4 M...
Tuesday, January 29, 2008 at 4:32pm by DrBob222

Chemistry(Please check)
8. The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that a. the reaction is zero order b.the reaction is first order c.the reaction is second order d. the reaction starts out first order and changes...
Monday, February 20, 2012 at 3:07pm by Hannah

Chemistry
If rate = k, isn't that a zero order reaction?
Tuesday, September 14, 2010 at 10:39pm by DrBob222

enviromental
Completely mixed flow ractor CSTR and plug flow reactor (PFR) may have significantly different efficiencies depending on the reaction order. This problem asks you to compare the relative reactor sizes required to ensure 99.0 % removal of wastewatwer pathogens. Wastewater from ...
Sunday, October 14, 2012 at 11:44am by don

chemistry
A first-order reaction is 40% complete at the end of 50 minutes. What is the value of the rate constant (in min^-1)? A. 1.8 x 10^-2 B. 1.0 x 10^-2 C. 1.2 x 10^-2 D. 8.0 x 10^-3 E. none of these how would i approach this problem? i know that to find the rate constant, i could ...
Monday, May 26, 2008 at 7:42pm by jesse may

Chemistry
Nitrogen Monoxide reacts with hydrogen gas to form nitrogen gas and water (vapor). (i). write a balanced equation for this reaction. (ii). The reaction is experimentally found to be (approx) first-order in H2 and second order in in NO. Write the form if the experimentally-...
Saturday, April 14, 2012 at 6:53pm by Crystal

Chemistry
Your Open Question Show me another » Chemistry help needed... Confused? The following reaction is first order and the rate constant is 2.35 x 10^-4 s^-1 at 20 degress C. 2 N2O5 -----> 2 N2O4 + O2 A.) What is the rate of reaction if the [N2O5]=.25 M? B. What would...
Tuesday, November 20, 2012 at 11:54am by Krissy

Chemistry
The fictitious compound, arrhenium fluoride ( ), reacts with itself to form a dimer with the formula Ah2F2 . The reaction is second order in AhF. The value of the rate constant is 8.591x10-3 M-1s-1. What is the initial rate of reaction in a reactor filled with AhF to a ...
Thursday, December 6, 2012 at 12:47pm by T

chemistry.
The thermodynamic equilibrium constant for the following reaction is 0.15 at 1227°C. 2 SO2(g) + O2(g) 2 SO3(g) Which is true? Can be more than one answer. a. The reaction is product-favored. b. The reaction is reactant-favored. c. G°is less than zero. d. G° is ...
Friday, November 19, 2010 at 6:56pm by carla

CHEMISTRY!
A zero-order reaction has a constant rate of 3.40×10−4 M/s. If after 80.0 seconds the concentration has dropped to 6.00×10−2 M, what was the initial concentration?
Wednesday, February 25, 2009 at 5:25pm by Reese

CHEm. help please
The thermodynamic equilibrium constant for the following reaction is 0.15 at 1227°C. 2 SO2(g) + O2(g) 2 SO3(g) Which is true? Can be more than one answer. a. The reaction is product-favored. b. The reaction is reactant-favored. c. G°is less than zero. d. G° is ...
Friday, November 19, 2010 at 8:30pm by carla

chemistry ASAP please!!
One reaction that destroys O3 molecules in the stratosphere is NO + O3  NO2 + O2 When this reaction was studied in the laboratory, it was found to be first order with respect to both NO and O3 with a rate constant of 1.9 x 104 mol L-1S-1. If [NO] = 1.2 x 10-5 mol L...
Sunday, March 20, 2011 at 6:48pm by Massiel

science
the unit of zero order rate constant is what?
Friday, September 3, 2010 at 10:25am by devi

Chem II
The rate constant for a reaction at 305.0 K is two times the rate constant at 295.0 K. The activation energy of the reaction is ______ kJ mol
Friday, June 13, 2008 at 5:02pm by Ken

chemistry
The reaction A + B + C = products has a rate law rate = kA]C]2. Which of the following will result in an increase in the rate constant for the reaction? #1 - increasing the temperature #2 - adding a catalyst #3 - doubling the concentration of reactant C a. only one of these (...
Friday, February 17, 2012 at 9:35pm by elvis

Chemistry
A reaction is said to be diffusion controlled when it occurs as fast as the reactants diffuse through the solution. The following is an example of a diffusion controlled reaction. The rate constant for this reaction is 1.4x1011 M-1s-1 at 25oC and the reaction obeys the ...
Tuesday, May 19, 2009 at 11:59pm by Kevin

Chemistry(Please check)
The units of a rate constant for zero, first, and second order reactions are given in the textbook. If the time units are minutes, what would you expect the units to be for a third order reaction? 1) 1/min^3 2) mol^2/L^2-min 3) L/mol-min^2 4) L^2/mol^2-min 5) L^2/mol^2-min^2 I...
Sunday, February 19, 2012 at 5:43pm by Hannah

Chemistry
The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2 . The reaction is second order in AhF. The value of the rate constant is 8.591x10-3 M-1s-1. What is the initial rate of reaction in a reactor filled with AhF to a ...
Thursday, December 6, 2012 at 11:55pm by Please Help Me

Chemistry
If a catalyst is added to a system at equilibrium and the temperature and pressure remain constant there will be no effect on the: (1) rate of the forward reaction (2) rate of the reverse reaction (3) activation energy of the reaction (4) heat of reaction 4, am i right ?
Wednesday, March 9, 2011 at 3:53pm by Jazmin F.

Kinetics Problem II
The data below were collected for the following reaction: 2NO2 (g) + F2 (g) ->2NO2F(g) A: Calculate the value of the rate constant, k. B: What is the overall order of the reaction?
Wednesday, January 30, 2013 at 12:51am by Amy

rate laws and concentrations :: Chemistry.
A student studied the kinetics of the reaction of sodium hypochlorite and a vegetable dye by the method of pseudo order. He mixed 5 mL of a 0.67 M solution of NaOCl with 15 mL of a vegetable dye, he took a portion of the mixture and absorbance was measured at intervals of 20 ...
Wednesday, June 16, 2010 at 1:56pm by JACOBY

chemistry
The units of a rate constant for zero, first and second order reactions are given in the textbook. If the time units are minutes, what would you expect the units to be for a third order reaction? a. 1/min3 b. mol2/L2-min c. L/mol-min2 d. L2/mol2-min e. L2/mol2-min2 help help!
Friday, February 17, 2012 at 9:20pm by senior pup

Chemistry
The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 8.591x10-3 M-1s-1. What is the initial rate of reaction in a reactor filled with AhF to a ...
Monday, December 10, 2012 at 1:31am by Please Help Me!!!!!!!!

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Search: A zero-order reaction has a constant rate of 1.70&times;10&amp;#8722;4 . If after 80.0 seconds the concentration has dropped to 6.00&times;10&amp;#8722;2 , what was the initial concentration?

Search: A zero-order reaction has a constant rate of 1.70×10−4 . If after 80.0 seconds the concentration has dropped to 6.00×10−2 , what was the initial concentration?