Search: chemistry-rate of reaction

Number of results: 109,989

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
I am trying to figure out how to calculate the reaction rate. In my question the reaction rate is: 1/2x molarity of sodium thiosulfate/reaction time Then I have to compare the rates of runs 1-3 and determine the orders of the reaction. Do I only find the reaction rate based ...
Monday, October 1, 2012 at 6:25pm by Zach

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
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
The rate of a reaction A ---> B is expressed by the rate expression rate=k(A)2. If the molar concentration of A is tripled, the rate of the reaction should increase by a factor of some many?
Saturday, February 9, 2013 at 5:49pm by Marcus

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.

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 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
The equation A + 2 B = C + D describes an elementary reaction, which takes place in a single step. Thus, the rate law must be a. rate = k(A]2 b. rate = k(B]2 c. rate = k(A][B] d. rate = k(A][B]2 e. none of the above represents the rate law for this elementary reaction. help
Saturday, February 25, 2012 at 10:09am by bob

chemistry
The following reaction is a single-step, bimolecular reaction: CH3Br + NaOH --> CH3OH + NaBr When the concentrations of CH3Br and NaOH are both 0.135 M, the rate of the reaction is 0.0070 M/s. (a) What is the rate of the reaction if the concentration of CH3Br is doubled...
Saturday, March 24, 2012 at 2:18pm by katie

chemistry
The rate constant for this reaction was found to be 0.00550 s-1. What is the instantaneous rate of reaction when the concentration of dinitrogen pentoxide is 0.100 M? Rate = k[N2O5].
Thursday, April 26, 2012 at 5:15pm by Anonymous

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

chemistry
1. Isn't there a rule somewhere in kinetics that says something about "doubling the rate of reaction for every 10 degrees change in T?" So what percent would that be? 2. I don't like any of the choices. Doubling the pressure is the same as doubling the ...
Monday, January 18, 2010 at 1:20pm by DrBob222

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 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

chemistry
What is the rate of disappearance of dinitrogen pentoxide between 100 s and 200 s? Is this rate higher or lower than the rate from 0 s to 100 s that you calculated in part c? As the reaction takes place, what happens to [N2O5]? In general, does a higher concentration of ...
Thursday, April 26, 2012 at 5:14pm by Anonymous

Chemistry 2
An industrial chemical reaction has a rate law: rate = k [C]. The activation energy for the reaction is 3.0000 x 10^4 J/mol and A = 2.000 x 10^-3. What must be the reaction temperature if a rate of 1.000 x 10^-9 M/s is required and [C] must be kept at 0.03000M. Hint: What must...
Monday, March 12, 2012 at 1:18pm by Jessica

chemistry
The reaction described by this equation O3(g) + NO(g) -- O2(g) + NO2(g) has the following rate law at 310 K. rate of reaction = 3.0x10^6 M^-1 s^-1)[O3][NO] Given that [O3]=2.0× 10–4 M and [NO]=2.0× 10–5 M at t=0, calculate the rate of the reaction at t=0.
Friday, March 23, 2012 at 1:34pm by Katie

Chemistry
Organic chemists state that the rate of a chemical reaction can be doubled by increasing the reaction temperature by ten degrees Celsius. Explain this drastic increase in reaction rate using the concept of reactins and kinetic molecular theory
Wednesday, March 31, 2010 at 7:06pm by Celia

Chemistry
using kinetics explain: a.the increasing of concentration of reactants increases the rate of reaction. b.the addition of a catalyst increases the rate at which a reaction will take place. c.and increase in temperature increases reaction rate. d.a catalyst grounded into powder ...
Monday, March 3, 2008 at 8:58pm by Chuck

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

Chemistry
During rate of reverse step... A. A catalyst decreases the reverse rate of reaction. B. A catalyst does not change the reverse rate of reaction. C. A catalyst increases the reverse rate of reaction. A catalyst hastens the time for equilibrium to be attained. A A
Sunday, January 28, 2007 at 6:21pm by Question

Chemistry
For the reaction: 5A + 3B -> 6C + D, the following data is found: Time________A 0.00s .775 M 5.00s .200 M Find the rate of disappearance of A, the overall rate of reaction, and the reates of disapperance and appearance of B, C, and D. The answers I got were: Rate of ...
Wednesday, February 21, 2007 at 11:18am by Aletha

Chemistry
Given the reaction system; 2 NO (g) + O2 (g) -> 2 NO2 (g) Write a brief explanation for each of the following statements in terms of the collision model and/or reactions mechanisms. (1)Increasing the concentration of NO (g)makes the reaction go faster. (2)Increasing the...
Thursday, January 27, 2011 at 2:26pm by Michael

Chemistry
The chemical reaction N2(g)+ 3H2(g)<--> 2NH3(g) is at equilibrium. An expirimenter increases the volume of the reaction chamber by 10%. Explain what happens to bith the forward and reverse reaction rates from the moment the volume is changed until equilibrium is ...
Thursday, April 12, 2007 at 7:51pm by Chrissy

Chemistry
The overall rate of any chemical reaction is most closely related to a) the number of steps in the reaction mechanism b)the overall reaction c) the fastest step in the reaction mechanism d)the slowest step in the reaction mechanism e) the average rate of all the steps in the ...
Wednesday, July 21, 2010 at 6:17pm by Bobby

Chemistry
For a given reaction 2A + B --> C, if the concentration of A doubles then the reaction rate doubles. If the concentration of both A and B doubles then the reaction rate increases by factor of 8. What is the order of the reaction with respect to B?
Saturday, October 2, 2010 at 3:44pm by Anonymous

chemistry
When the concentration of CH3Br and NaOH are both 0.150M, the rate of the reaction is 0.0020M/S. (a) What is the rate of the reaction if the concetration of CH3Br is doubled? _______________M/s (b) What is the rate of the reaction if the concentration of NaOH is halved? ...
Wednesday, February 27, 2013 at 1:49pm by dj

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
1. How is the rate affected by doubling the concentratino? 2. Explain the effect of concentration on the rate of a reaction in terms of the "Collision Theory" of chemical reactions. 3. Considering that 1/Time is proportional to the rate of the reaction how is the ...
Sunday, November 18, 2007 at 3:05pm by Dick Rogers

Chemistry
For the reaction, 2 XO + O2 = 2 X02, some data obtained from measurement of the initial rate of reaction at varying concentrations are given below. run # [XO] [O2] rate, mol L-ls-l 1 0.010 0.010 2.5 2 0.010 0.020 5.0 3 0.030 0.020 45.0 The rate law is therefore a. rate = k[XO]...
Monday, February 20, 2012 at 4:29pm by Hannah

Chemistry
The rate of the following reaction is 0.480 M/s. What is the relative rate of change of each species in the reaction? A+3B=2C
Saturday, July 16, 2011 at 2:09pm by Josh

Chemistry
For the reaction, 2 XO + O2 = 2 X02, some data obtained from measurement of the initial rate of reaction at varying concentrations are given below. run # [XO] [O2] rate, mol L-ls-l 1 0.010 0.010 2.5 2 0.010 0.020 5.0 3 0.030 0.020 45.0 The rate law is therefore a. rate = k[XO...
Monday, February 20, 2012 at 3:10pm by Hannah

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
the rate of the following reaction is 0.72 M/s. what is the relative rate of change of each species in the reaction? A+4B -> 2C
Thursday, February 28, 2013 at 8:05pm by Anonymous

chemistry
In a chemical reaction, substance A combines with substance B to form substance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a> and <img src=. At time t seconds after the start of the ...
Monday, March 14, 2011 at 2:50am by mike

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 (urgent)
Suppose a reaction involved a finely ground powder reacting with a concentrated acid. Suggest three methods of decreasing the reaction rate. 1. By placing the reactants in cold water. 2. ? 3. ? Can someone please help? I can't think of what else I can do to slow down the ...
Tuesday, March 2, 2010 at 11:07am by John

Chemistry (URGENT)
Suppose a reaction involved a finely ground powder reacting with a concentrated acid. Suggest three methods of decreasing the reaction rate. 1. By placing the reactants in cold water. 2. ? 3. ? Can someone please help? I can't think of what else I can do to slow down the ...
Tuesday, March 2, 2010 at 3:25am by John

chemistry
When N2 is injected the forward reaction increases because N2 is larger. The reverse direction also increases since products are forming at a greater rate. At the end when equilibrium is re-established the forward reaction rate = reverse reaction rate.
Friday, April 20, 2012 at 4:16pm by DrBob222

Chemistry
A + 2 B = C + D describes an elementary reaction, which takes place in a single step. Thus, the rate law must be a) rate = k (A)^2 b) rate = k (B)^2 c) rate = k (A) (B) d) rate = k (A) (B)^2 I think its D because there are 2 moles of B and 1 mole of A. Do you agree with my ...
Friday, February 24, 2012 at 2:34am by Mohamed

Chemistry
A 1.0-mL volume of 0.010 M H2SO3 is added to a mixture of 12 drops of 0.010 M HIO3, 8 drops of deionized water, and 1 drop of starch solution. a color change occured after 40 seconds. the rate of reaction is measured by the disappearance of HIO3. got the reaction mixture in ...
Thursday, February 21, 2013 at 7:05pm by Anonymous

chemistry
H2C=CH2(g) + H2(g) C2H6(g) Adding a small amount of platinum powder greatly increases the rate of the reaction above. How might the platinum be affecting the rate of the reaction? (Select all that apply.) 1) It increases the concentration of the reactants. 2) It increases the ...
Thursday, November 18, 2010 at 2:42pm by nick

chemistry
A reaction has a rate law, rate = kA]B]^2 What is the overall order of the reaction? a. 2 b. 3 c. 0 d. 1 e. 4
Friday, February 17, 2012 at 9:14pm by steve

chemistry
For the reaction, 2 XO + O2 = 2 X02, some data obtained from measurement of the initial rate of reaction at varying concentrations are given below. run # [XO] [O2] rate, mol L-l s-l 1 0.010 0.010 2.5 2 0.010 0.020 5.0 3 0.030 0.020 45.0 The rate law is therefore a. rate = k[XO...
Friday, February 17, 2012 at 9:18pm by steve

Chemistry
For the reaction, 2 XO + O2 = 2 X02, some data obtained from measurement of the initial rate of reaction at varying concentrations are given below. run # [XO] [O2] rate,mol L-l s-1 1 0.010 0.010 2.5 2 0.010 0.020 5.0 3 0.030 0.020 45.0 The rate law is therefore a. rate = k[XO]...
Tuesday, February 21, 2012 at 5:18pm by Kay

chemistry
A reaction has a rate law, rate = kA]B]^2 What is the overall order of the reaction? a. 2 b. 3 c. 0 d. 1 e. 4 chemistry - DrBob222, Friday, February 17, 2012 at 10:53pm The overall is the sum of the orders of each component. still dont get it but guessing A
Saturday, February 18, 2012 at 9:13pm by elvis

Chemistry
Explain the following observation in terms of the collision theory, restricting each to about 25 words. NO(g) + O3(g)--> NO2(g) + O2(g) (a) An increase in temperature increases the reaction rate. (b) Compressing the gases into a smaller volume increases the reaction ...
Thursday, January 20, 2011 at 10:53am by Patrick

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
1. The following data was collected for the reaction between hydrogen and nitrogen monoxide. The time recorded corresponds to a N2 concentration change of 5.3 x 10-4 M. 2H2(g) + 2NO(g)  2H2O(g) + N2(g) Trial [H2], M [NO], M Time, s 1 0.01 0.02 74 2 0.02 0.02 37 3 0...
Tuesday, June 4, 2013 at 9:58pm by Jason

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

Chemistry
The reaction X + Y --> Z the reaction rate is for to depend only upon the concentration of X. A plot of 1/X versus time gives a straight line. What is the rate law for this reation?
Monday, February 25, 2008 at 8:35pm by Lauren

chemistry
I have two questions that I really don't understand. The first one is: A reaction proceeds with delta H=-10kJ/mol. The energy of activation of the uncatalyzed reaction is 150kJ/mol, whereas it is 100kJ/mol for the uncatalyzed reaction. How many times faster is the ...
Monday, March 5, 2012 at 2:41pm by kathryn

chemistry
State whether each of the following will increase,decrease or unchange when catalyst is added to the reaction and give an explanation for your answer please a) rate of reaction b)activation energy c)reaction enthalpy d)equilibrium of reaction
Saturday, July 9, 2011 at 1:00pm by Gift

Chemistry
When 442 mg of NO2 is confined to a 150. mL reaction vessel and heated to 300°C, it decomposes by a second-order process. In the rate law for the decomposition of NO2, k = 0.54 1/(M·s). A) what is the initial reaction rate? B) what is the reaction rate if the mass ...
Wednesday, March 31, 2010 at 8:00pm by Val

Chemistry
A chemist does a reaction rate analysis on the following reaction: 2CO (g) + O2 (g) → 2CO2 (g) She collects the following data: Trial Initial Concentration of CO (M) Initial Concentration of O2 (M) Instantaneous Reaction Rate (M/s) 1 0.150 0.150 0.113 2 0.300 0.150 0...
Thursday, June 30, 2011 at 11:11pm by Violet

chemistry
The chemical reaction N2(g) + 3 H2(g) ↔ 2 NH3(g) is at equilibrium. An experimenter injects a small amount of N2 into the reaction chamber. What happens to the forward reaction rate right after the injection of the N2? What happens to the reverse reaction rate right ...
Friday, May 4, 2012 at 4:11pm by Anonymous

chemistry
The chemical reaction N2(g) + 3 H2(g) ↔ 2 NH3(g) is at equilibrium. An experimenter injects a small amount of N2 into the reaction chamber. What happens to the forward reaction rate right after the injection of the N2?What happens to the reverse reaction rate right ...
Friday, April 20, 2012 at 4:16pm by Anonymous

reaction rate help
r = k*2^n. k = initial reaction rate. r = reaction rate after temperature change. 40deg. / 10deg. = 4. r = k*2^4 = 16k = 16 times initial temp.
Sunday, January 9, 2011 at 8:41pm by Henry

Chemistry(Please check)
1) The reaction A + B + C = products has a rate law rate = k times A times C squared. 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 I...
Sunday, February 19, 2012 at 6:07pm by Hannah

Chemistry
Write rate law expressions? 2NOCl(g) --> 2NO(g) + Cl2(g) S2O3^2-(aq) + H^+(aq) --> HSO3^-(aq) + S(s) (Sulfur initially forms a colloid solution so it can be treated as aqueous.) (1) Write the rate law expression for the above reactions, assuming these are ...
Wednesday, May 21, 2008 at 12:47am by Donna

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

Physical Chemistry
The presence of a catalyst provides a reaction pathway in which the activation energy of a certain reaction is reduced from 192 kJ·mol-1 to 72 kJ·mol-1. (a) By what factor does the rate of the reaction increase at 281 K, all other factors being equal? (b) By what...
Thursday, April 1, 2010 at 8:30pm by Mark

Chemistry help please!!!
Experimental Procedure, Part F. A 1.0- mL volume of 0.010 M H2SO3 is added to a mixture of 12 drops of 0.01 M HIO3, 8 drops of deionized water, and 1 drop of starch solution. A color change in the reaction mixture occured in 40 seconds. a. Assuming 25 drops per milliliter, ...
Thursday, January 27, 2011 at 2:38pm by john

Chemistry
You can change the rate of the reaction by increasing OH or CH3Br (will increase rate) or decreasing OH or CH3Br (will decrease rate). Cooling the reaction mixture will decrease the rate; increasing T will increase rate.
Monday, April 16, 2012 at 2:05pm by DrBob222

Organic Chem
The following reaction is a single-step, bimolecular reaction: CH3Br + NaOH ---> CH3OH + NaBr When the concentrations of CH3Br and NaOH are both 0.150 M, the rate of the reaction is 0.0090 M/s. a) what is the rate of the reaction if the concentration of CH3Br is doubled...
Wednesday, November 9, 2011 at 2:50am by Bryan

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
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.. kinetics
Initial rate Average rate instanteneous rate Which of these would have the highest value? Explain Please? Which one of these is typically used to determine the rate law for a reaction?
Tuesday, July 21, 2009 at 5:39pm by Sunshine

Chemistry
For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a greater extent than the activation ...
Thursday, March 1, 2012 at 11:02am by Mohamed

chemistry
For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a greater extent than the activation ...
Saturday, February 25, 2012 at 9:56am by bob

Chemistry
Name four factors that can affect the rate of a chemical reaction. How does the rate of a chemical reaction change in response to a change in each factor? My answer: Four factors that can affect the rate of a chemical reaction are concentration, surface area, temperature, and ...
Monday, October 11, 2010 at 6:16pm by Anonymous

Chemistry - Concentration and Time
1. How is the rate affected by doubling the concentratino? 2. Explain the effect of concentration on the rate of a reaction in terms of the "Collision Theory" of chemical reactions. 3. Considering that 1/Time is proportional to the rate of the reaction how is the ...
Saturday, November 17, 2007 at 8:59pm by Dick Rogers

chemistry reaction rate
2NO(g) + O2(g) → 2NO2(g) + 112 kJ what do you do to increase the reaction rate? decrease in pressure or increase in concentration of NO? HELP!
Sunday, January 9, 2011 at 8:52pm by mikki

chemistry
the activation energy is 31.7kj/mol. if the reaction rate is 7.4E-2 at 35.0 degrees c, what is the reaction rate constant at -55.0 degrees c.
Wednesday, December 15, 2010 at 3:15pm by Tara

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
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

CHEMISTRY PLEASE HELP
For the reaction A + 2B + C ----> 2 D + E the following initial concentration and initial reaction rates are found: [A]null (M) [B]null (M) [C]null (M) 0.150 0.150 0.150 0.275 0.150 0.150 0.275 0.564 0.150 0.150 0.314 0.253 0.193 0.314 0.217 initial rate wrt E (Ms^-1) 0...
Monday, February 25, 2008 at 11:32pm by Gabe

Chemistry
X + Y --> Q The reaction above has the rate law: rate = k[X]³. When [X] is doubled the rate increases by a factor of ?
Wednesday, March 9, 2011 at 2:16pm by Anthony

Chemistry
35. In a calorimeter, the energy content of a substance is calculated from a measure of the temperature change in a known mass of a. iron b. air c. water d. steel C? 36. A decrease in the reactant concentration, per unit time, in a reaction is a measure of the a. heterogenous ...
Friday, October 29, 2010 at 3:21pm by mysterychicken

help help help chemistry
why will no one answer this question? For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a ...
Monday, February 27, 2012 at 6:15pm by john117

chemistry
disappearance of NO in ...- Help!!!? The following data were collected for the rate of disappearance of NO in the reaction 2 NO(g) + O2(g) ¨ 2 NO2(g). Run: [NO](M) [O2](M) Initail Rate (M/s) 1 .0126 .0125 1.41 X 10^-2 2 .0252 .0125 5.64 X 10^-2 3 .0252 .0250 1.13 X ...
Wednesday, January 30, 2013 at 5:55pm by Hannah

chemistry
The rate of formation of C in the reaction 2 A + B ----> 3 C + 2 D is 2.2 mol/L.s. Calculate the rates of reaction of A and B, and the rate of formation of D.
Wednesday, March 11, 2009 at 9:51am by donna

Chemistry
The following reaction was studied at −10°C. 2 NO(g) + Cl2(g) → 2 NOCl(g) The following results were obtained where the rate of the reaction is given below. [NO]o [Cl2]o INITIAL RATE 0.10 0.10 0.18 0.10 0.20 0.36 0.20 0.20 1.45 What is the rate law? ...
Tuesday, March 20, 2012 at 12:22am by Kaleen

chemistry
If we expect the rate to be nonnegative, we must have 0 ≤ y ≤ a and 0 ≤ y ≤ b. Since we assume a < b, we restrict y to 0 ≤ y ≤ a. In fact, the expression for the rate is nonnegative for y greater than b, but ...
Monday, March 14, 2011 at 2:50am by helplessHelper

chemistry-rate of reaction
rection rate=rate constant * conc^2
Sunday, December 2, 2012 at 12:07am by qwerty

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
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
The reaction between NO (nitric oxide) and oxygen is a key step in the formation of acid rain. O2(g) + 2NO(g) → 2NO2(g) A series of experiments were run, each of which starts with a different set of reactant concentrations. From each experiment an initial rate of ...
Tuesday, March 27, 2012 at 5:16am by Roman

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

Chem
Consider the following reaction: 6A + 2B 5C + 4D Determine the following rates at a time when the rate of consumption of B is 2.5E-05 M/s. a) rate of consumption of A M/s b) rate of formation of C M/s c) rate of formation of D M/s d) rate of reaction M/s
Monday, November 14, 2011 at 10:12pm by Rachel

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 (again)
I need help with this question: Suppose you bake two cakes and the the one with twice as much baking powder raises twice as much. Is this proof of the relation between concentration and reaction rate? See I know concentration has an affect on reaction rate but I am not sure if...
Monday, April 23, 2007 at 2:36pm by Chrissy

Chemistry
In the reaction PCl3 + Cl2 ---> PCl5. If the rate doesn't increase when the concentration of PCl3 is doubled and the rate increases by a factor of four when the concentration of Cl2 is doubled, how would I write the rate law for the reaction?
Wednesday, February 27, 2008 at 5:33pm by Raj

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