Search: Rate Constant - My Work is Incorrect

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Rate Constant - My Work is Incorrect
Hi! I am stuck with this question and I would like to know what I did wrong: Given that the initial rate constant is 0.0160 s-1 at an initial temperature of 25 degrees C, what would the rate constant be at a temperature of 130 degrees C for the same reaction described in Part ...
Sunday, February 3, 2013 at 3:26pm by Amy

Chemistry
1) Gases are not included in the equilibrium constant expression.They are included so this is incorrect. 2) Equilibrium constant can be increased by adding a catalyst.They can not be changed by adding a catalyst so this is incorrect 3) Large equilibrium constant favors ...
Saturday, March 17, 2012 at 7:01pm by DrBob222

physics14
In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.2 multiplied by 10-17 N during the first 2.2 cm of the tube's length; then they move at essentially constant velocity another 43 cm before hitting the screen. (a) Find ...
Thursday, February 16, 2012 at 8:07pm by jm

physics6
In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.2 multiplied by 10-17 N during the first 2.2 cm of the tube's length; then they move at essentially constant velocity another 43 cm before hitting the screen. (a) Find ...
Thursday, February 16, 2012 at 3:53pm by Anonymous

music PLZ HELP CHECK MY ANSWERS
-------------------------------------------------------------------------------- Question Number Your Answer Answer Reference...
Tuesday, August 9, 2011 at 8:08pm by Anonymous

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

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

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
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

calculus
Maximize p = 2x + 2y subject to 4x + 8y 24 8x + 4y 32 x 0 , y 0 (Round all answers to the nearest 0.1.) p = Incorrect: Your answer is incorrect. x = Incorrect: Your answer is incorrect. y = Incorrect: Your answer is incorrect.
Sunday, November 13, 2011 at 9:38pm by LC

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

Math
Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x)) (my answer was 100.9...
Wednesday, May 29, 2013 at 10:52pm by DeeDee

ALGEBRA
If the principal P = $500, the rate r = 5 1 2 %, and time t = 1 year, find the following. (a) What is the amount of interest? $ Incorrect: Your answer is incorrect. (b) What is the future value?
Wednesday, April 25, 2012 at 8:51pm by Randy

physics
Vector V1 is 8.58 units long and points along the -x axis. Vector V2 is 4.45 units long and points at +40.0° to the +x axis. (a) What are the x and y components of each vector? V1x = Incorrect: Your answer is incorrect. V1y = Incorrect: Your answer is incorrect. V2x = ...
Tuesday, September 25, 2012 at 6:35pm by royaa

physics
The speed of a point on a rotating turntable, which is 0.264 m from the center, changes at a constant rate from rest to 0.902 m/s in 1.94 s. At t1 = 0.64 s, find the magnitude of the tangential acceleration. Answer in units of m/s2 I assumed the velocity was constant so i ...
Monday, September 12, 2011 at 10:21pm by squires

basic dressmaking processes
1.A Correct 2.D Incorrect PAGES 1-2 3.B Incorrect PAGE 5 4.C Incorrect PAGE 8 5.A Correct 6.D Correct 7.C Incorrect PAGE 18 8.B Incorrect PAGE 32 9.C Incorrect PAGE 37 10.D Correct 11.C Incorrect PAGE 39 12.C Incorrect PAGE 44 13.A Correct 14.B Correct 15.D Correct 16.C ...
Tuesday, August 30, 2011 at 3:22pm by Jasmine

Chemitry
The reaction rate is assumed to be of the form Rate = Constant * e^(-Ea/RT) where T must be in Kelvin Rate(75C)/Rate(45C) = e^-[Ea/348R - Ea/318R] where R = molar gas constant = 8.317 J/(mol*K) and Ea = 4860 J/mol is the activation anergy Rate(75C)/Rate(45C) = e^[(Ea/k)(1/318...
Saturday, December 25, 2010 at 1:13pm by drwls

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
Which of the following will be affected by the addition of a catalyst to a chemical reaction? Choose all that apply. thanks A)the magnitude of the equilibrium constant B) the value of the ratio kf/kr C) ÄHo D) ÄSo E) the value of the forward rate F) the value of the ...
Saturday, May 29, 2010 at 12:11pm by Adam

Chemistry
Which of the following will be affected by the addition of a catalyst to a chemical reaction? a. ÄGo b. the value of the reverse rate constant, kr c. the value of the reverse rate d. the value of the ratio kf/kr e. the value of the forward rate f. the value of the forward...
Sunday, May 30, 2010 at 12:18am by John

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

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

7th grade Science
rate*wavelength=constant and the constant is the velocity of propagation. if rate is increased, then wavelenght will decrease.
Tuesday, November 11, 2008 at 7:35pm by bobpursley

calculus
Boyle's law states that if the temperature of a gas remains constant, then PV = c. Where P is the pressure, V is the volume, and c is a constant. Given a quantity of gas at constant temperature, if V is decreasing at a rate of 13 in.^3/s, at what rate is P increasing when ...
Sunday, May 2, 2010 at 11:38pm by Hussain

Chemistry
calculate the rate constant at 225C for a reaction that has a rate constant of 8.1X10^-4 at 95c and an activation enegry of 93.0 kj/mol
Saturday, June 8, 2013 at 7:39am by Jason

chemistry
What is the rate? You don't list the rate or rate constant and I don't see any way to calculate the rate.
Sunday, February 21, 2010 at 9:42pm by DrBob222

chemistry(check my answer)
Which of the following will be affected by the addition of a catalyst to a chemical reaction? a)the value of the reverse rate constant, kr b)the magnitude of the equilibrium constant c)the value of the forward rate d)ΔHo e)the value of the forward rate constant, kf f...
Friday, May 14, 2010 at 2:32am by eng

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
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

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

Algebra 1
using a constant rate, you can saw a log into 3 pieces in 12 minutes. At the sam constant rate, how long will it take you to cut a siliar log (if the same size) into 6 pieces? would you do a rate formula or what? I'm really stuck on this one!
Tuesday, May 20, 2008 at 5:59pm by Libby

Chemistry
2A-->B+C given that the initial concentration of A is .022M and that at 69 s, the concentration of B increases to .0095M, what is the rate constant? i know I need to find the new concentration of A at 69s, but I am having trouble with findthing this. I thought it might ...
Wednesday, March 31, 2010 at 9:52pm by Val

chemistry(check my answer)
the value of the forward rate constant (kf), the value of the reverse rate constant (kr), the value of the forward rate, and the value of the reverse rate
Friday, May 14, 2010 at 2:32am by uci student

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
You mix together in the proper manner the following VOLUMES: 0.0100 M Potassium iodide...9.2 mL 0.0010 M Sodium thiosulfate...6.5 mL Distilled water...16.8 mL 0.0400 M Potassium Bromate...13.9 mL 0.100 M Hydrochloric acid...6.1 mL Using the rate constant and rate equation ...
Saturday, March 2, 2013 at 10:01pm by Cassie

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
A second-order reaction has a rate constant of 1.65 M–1 s–1. If the initial reactant concentration is 1.0 M, calculate the time (in seconds) required for the reaction to become 90% complete. i got 0.06734 seconds but thats incorrect i have no idea what i am doing ...
Wednesday, March 28, 2012 at 9:02pm by Maya

Grammar question
1. incorrect 2. correct 3. correct 4. correct 5. correct 6. incorrect 7. incorrect 8. I would say "careers" since the reference is to "employees' careers" - but there's no pronoun error here. 9. incorrect 10. incorrect 11. correct
Tuesday, August 12, 2008 at 7:28pm by Writeacher

Physics
All answers should be in degrees. (a) Using the result of Lecture 31 Question 3, and Snell's law, derive and evaluate for the secondary rainbow for the following values of the incidence angle and index of refraction . 1 , 1.4 incorrect 45 , 1.3 incorrect 87 , 1.55 ...
Wednesday, June 5, 2013 at 6:02am by P

chemistry
For a certain chemical reaction, the rate constant at 250.0 °C is 0.00383 s-1 and the activation energy is 22.40 kilojoules. Calculate the value of the rate constant at 335.0 °C. a. 0.00513 s-1 b. 0.00946 s-1 c. 0.00787 s-1 d. 0.0224 s-1 e. 0.000640 s-1 b or c
Friday, February 24, 2012 at 7:54pm by bob

business
You have recently learned that the company where you work is being sold for $275,000. The company’s income statement indicates current profits of $10,000 which have yet to be paid out as dividends. Assuming the company will remain a “growing concern” into the ...
Saturday, January 7, 2012 at 7:44pm by john

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
2 and 3 are correct. 1 is correct if you are discussing the reaction rate at constant pressure, but at constant volume the collision rate does increase slowly with temperature (in proportion to sqrt T)
Thursday, December 20, 2007 at 4:01am by drwls

Physics
A 5.50-kg ball, moving to the right at a velocity of +2.35 m/s on a frictionless table, collides head-on with a stationary 7.60-kg ball. Find the final velocities of the balls if the collision meet the following conditions. (a) elastic 5.5-kg ball = Incorrect: Your answer is ...
Tuesday, March 26, 2013 at 10:20am by Anonymous

math(need to know if i worked this right)
Your lack of brackets make the order of operation incorrect. Here is probably what you meant (x-3)/3 - (x-2)/5 =(5(x-3) - 3(x-2))/15 = (5x-15 - 3x+6)/15 = (2x - 9)/15 notice your constant in the last line is incorrect
Wednesday, April 9, 2008 at 10:45am by Reiny

Chemistry
1) Three factors control the rate of evaporation of a liquid: surface area, temperature, and strengths of intermolecular forces. More than one of the statements given described a correct effect. The statements are (1) the larger the surface area, the faster the rate of ...
Monday, January 30, 2012 at 3:44pm by Hannah

chemistry
The reaction 2NOCl(g) ¨ 2NO(g) + Cl2 (g) has an activation energy of 100.0 kJ/mol and a rate constant at 350.0 K of 8.5 x 10-6 mol-1 L s-1. Determine the rate constant at 400 K.
Tuesday, February 9, 2010 at 11:04pm by G-Unit 32

physics
The half life of C=14 is 5730 years. A living organism has a decay rate of 15.2 decays per minute per gram. You have a 55 gram sample; therefore, 55 g x 15.2 d/min*g = 836 d/min for the 55 g sample. That's the initial rate or Ro. ln(Ro/R) = kt So Ro is the intial rate from...
Monday, May 5, 2008 at 9:13pm by DrBob222

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

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
calculate the rate of a constant reaction at 293 kelvin when the energy of activation is 103 kilo joules per mole and the rate constant at 273 kelvin is 7.87*10 to the power -7...
Thursday, January 24, 2013 at 3:14am by Emeldah

Chemistry
the activation energy for the decomposition of HI(g) to H2(g) and I2(g) is 186kj/mol. the rate constant at 555k is 3.42 x 10^-7 L/mol*s. What is the rate constant at 645K? Please Show all Steps! thank you!
Tuesday, October 26, 2010 at 7:03pm by Jack

chemistry
The rate CONSTANT changes with T but it does not change with the addition of a catalyst or changing concn. Adding a catalyst WILL change the rate (but not the constant) and changing the concn of C WILL change the rate but not the constant.
Friday, February 17, 2012 at 9:35pm by DrBob222

Economics
“Many countries peg their own currencies to the greenback; these countries import U.S. inflation when the Fed makes a mistake.” Why would these countries “import” inflation. A. this is incorrect because countries only import goods or services B. this is ...
Sunday, March 27, 2011 at 10:10am by CLA

Chemistry(Please check)
there is a difference between the rate constant, and the rate. Changing concentration affects rate.
Sunday, February 19, 2012 at 6:07pm by bobpursley

Math
What can be added is the rate of work. This is how much work each finishes in an hour. Ben's rate + Ted's rate = 1/6+1/11 = 17/66 Together they do 17/66 of the work in an hour. So time it takes to get the work done = 1/(17/66) = 66/17 = 3 15/17 hours
Sunday, June 12, 2011 at 7:40pm by MathMate

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

Chemistry
A will work IF the reactants are gases. B will work because it gives the molecules more energy. C will work to increase the rate of reaction because the activation energy is lowered. D generally decreases the rate.
Wednesday, February 9, 2011 at 9:13am by DrBob222

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

chem
We can treat the equilibrium constant as the ratio of the forward rate constant, kfwd, with respect to the reverse rate constant, krev. That is: Keq = kfwd / krev. Which statement is true? a) kfwd > krev b) kfwd < krev The answer is A but how would you explain ...
Wednesday, April 27, 2011 at 9:07pm by Adam

Chemistry
Decomp. of H2O2 with Catalase.I am trying to use the Arrhenius equation in my coursework, but i am struggling to get it to work. I have substituted most of the information in, such as activation energy(23000J), and gas constant(8.314x10-3) etc. The issue is "A" which...
Sunday, February 27, 2011 at 11:36am by Suriya

8th grade
constant rate of change. constant speed is constant change of distance/time so if you are going 25mph, your distance is changing at a constant 25miles each hour.
Wednesday, December 1, 2010 at 7:50pm by bobpursley

chemistry
the rate constant for the reaction is 0.152 s_-1 at 27 degree the rate constant increases to 0.304 s _-1 at 37 degree whta is the value of energy of activiation for the reaction?
Monday, March 28, 2011 at 12:12pm by dea

CHM 152
The activation energy for a reaction is 37.6 kJ/mole. The rate constant for the reaction is 5.4 x 10-3 s-1 at 45 oC, Calculate the rate constant at 145 oC.
Thursday, June 10, 2010 at 9:40pm by Car

chemistry
The rate constant of the reaction between CO2 and OH - in aqueous solution to give the HCO3- ion is 1.5 1010 1/(M·s) at 25°C. Determine the rate constant at blood temperature (37°C), given that the activation energy for the reaction is 38 kJ/mol. units 1/(M&...
Tuesday, June 12, 2012 at 6:50pm by parker

algebra
A principal of $5000 was invested in a savings account for 4 years. If the interest earned for the period was $400, what was the interest rate? i know this is 1.5 % or at least I think it is but how do i write it out? Use the equation I=Prt, where I=interest earned, P=...
Wednesday, May 30, 2007 at 12:04am by confused

Chemistry
An atmospheric scientist interested in how NO is converted into NO2 in urban atmospheres carries out two experiments to measure the rate of this reaction. The data are tabulated below. A: [NO]0 = 9.63 × 10-3 M, [O2]0 = 4.1 × 10-4 M t(s) 0/3.0/6.0/9.0/12.0 [O2] 4.1/...
Thursday, February 23, 2012 at 1:05pm by help

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

calc
2- The earth’s atmospheric pressure p is often modeled by assuming that the rate dpdhat Which p changes with the altitude above sea level is proportional to hp. Suppose that the pressure at sea level is 1013 millibars (about 14.7 pounds per square inch) and that the ...
Tuesday, April 10, 2007 at 11:52pm by barb

Kinetics Problem I
A reaction has a rate constant of 1.23×10-4 s at 28 degrees C and 0.235 s at 79 degrees C. A: Determine the activation barrier for the reaction. B: What is the value of the rate constant at 15 degrees C?
Wednesday, January 30, 2013 at 12:51am by Amy

physics
A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.845 m/s encounters a rough horizontal surface of length scripted l = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.357 and he exerts a constant ...
Monday, June 3, 2013 at 12:51pm by Melissa

Chemistry
the activation energy for the decomposition of HI(g) to H2(g) and I2(g) is 186kj/mol. the rate constant at 555k is 3.42 x 10^-7 L/mol*s. What is the rate constant at 645K? Please show all steps USING THE ARRHENIUS EQUATION. Here is my work so far: K = A e^(-Ea/RT) 3.52 x 10^-...
Tuesday, October 26, 2010 at 9:00pm by Jim

English
1. incorrect 2. correct 3. incorrect 4. correct 5. probably correct; I'd also call it a dangling modifier!! 6. incorrect 7. incorrect 8. correct
Tuesday, April 12, 2011 at 2:53pm by Writeacher

Statistics
Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x)) Incorrect: Your ...
Sunday, May 26, 2013 at 12:06pm by Tom

statistics
Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x)) Incorrect: Your ...
Sunday, May 26, 2013 at 10:58am by Tom

Arrhenius Reaction
The activation energy of a certain reaction is 32.9 kJ/mol At 25 degrees C the rate constant is 0.0160 units s-1 units. At what temperature in degrees Celsius would this reaction go twice as fast? Given that the initial rate constant is 0.0160 s-1 at an initial temperature of ...
Wednesday, January 30, 2013 at 12:29am by Amy

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

computers
Problem Solving INCORRECT PAY RATE: Recently you received a promotion that indicated a pay raise. You log into your company portal and verify that your rate of pay has increased. After receiving your next paycheck, however, you realize that you were paid at the previous rate ...
Friday, April 26, 2013 at 4:56pm by Anonymous

Chemistry
Think about this. Then let us know what you think and why! The answer should be obvious if you think about it. A liquid in a stoppered flask is allowed to stand at constant temperature entil the liquid level in the flask remains constant. which condition then exists in the ...
Monday, March 26, 2007 at 9:39pm by DrBob222

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

Temperature Problem
Q: A reaction rate has a constant of 1.23 x 10-4/s at 28 degrees C and 0.235 at 79 degrees C. Determine the activation barrier for the reaction. A: My work thus far: ln(1.23 x 10-4/0.235)=(Ea/8.314)(1/301.15-1/352.15) -7.551=(Ea/8.314)(0.0048090535) -7.551=(Ea/8.314)(0....
Saturday, February 2, 2013 at 10:16am by Amy

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

English
1. correct 2. correct 3. incorrect 4. incorrect 5. correct 6. incorrect 7. incorrect Some of these are deliberately tricky!
Tuesday, July 27, 2010 at 11:55am by Writeacher

calculus
a 20 ft ladder is leaning against a wall. The bottom is being pulled out at a constant rate of 2.5 ft/sec. Will the top of the ladder clide sown thr wall at a constant rate? What will the rate be? In relation to time? It is not constant. Use pythagorus: x^2 + y^2 = l^2, where ...
Thursday, October 12, 2006 at 6:45pm by Suzy

physics
a car accelerates from rest at a constant rate 'a' for some time. after which it decelerates at a constant rate'b' and comes to rest. if the total time elapsed is t second, evaluate 1) the maximum velocity reached and 2) the total distance travelled.
Wednesday, July 13, 2011 at 10:41am by pavatharani

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

Math
Another approach might be to work work the problem backwards. For a third degree polynomial, Q''' is just a constant. Set that to 12. Inegrate to get Q'' =12x + C Adjust the constant for the desired result. Repeat for Q' and Q.
Friday, February 29, 2008 at 11:29am by Quidditch

Literature-Poetry
1. correct 2. correct 3. correct 4. incorrect 5. (can't tell without the whole work) 6. correct 7. correct 8. correct 9. incorrect - Count the syllables and then look up these terms at http://www.answers.com 10. incorrect 11. ?? 12. correct 13. incorrect http://www.answers...
Wednesday, May 28, 2008 at 3:56pm by Writeacher

mechanical engineering
If you provide the acceleration rate (a) in m/s^2 units, the force is F = M a. F is the force in Newtons and M is the mass in kg. 5 min/sec is not an acceleration rate. It is an incorrect time conversion factor. 5 meters/sec^2 IS an accleration rate. These are things you ...
Saturday, December 18, 2010 at 6:10am by drwls

PHYSICS
p V = n R T is state equation before and after Now work done at constant temp dW = -p dV but p = (n R T)/V and here n R T is constant given so dW = -(nRT) dV/V so work done = (nRT) ln(V1/V2) by the way, that is also the heat out since internal energy depends only on T which is...
Sunday, March 2, 2008 at 5:42pm by Damon

physics-speed
i need help with this one thanks A particle starts from rest and is acted on by a net force that does work at a rate that is proportional to the time t. The speed of the particle is proportional to: a. sq. root t b. t c. t^2 d.1/sq. root t e. 1/t Work done is proportional to ...
Tuesday, August 7, 2007 at 12:05am by Damon

chemistry
Values of the rate constant for the decomposition of N2O5 at four different temperatures are as follows: T(K) k(s^-1) 658....2.14*10^5 673....3.23*10^5 688....4.81*10^5 703....7.03*10^5 The activation energy is 1.02*10^2 kJ/mol. Calculate the value of the rate constant at 300 K
Sunday, October 14, 2012 at 10:42pm by Brunette

math formulas needed
Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = + x (ii) Graph this equation on a scatter diagram. (Do this on paper. Your ...
Tuesday, June 18, 2013 at 12:36pm by Tom 12

Algebra
Close...your constant 3 is incorrect
Thursday, September 24, 2009 at 3:34pm by Marth

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