Wednesday

April 23, 2014

April 23, 2014

Number of results: 17,470

**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*

**che,istry**

Isn't the rate for a first order reaction rate = k[A]?. rate = 0.5 Make A anything and solve for k. Then use rate = k[A]. you know k and [A] now is 1/2. Then 1/4. solve for rate for each. Check my thinking.
*Sunday, July 6, 2008 at 11:12pm by DrBob222*

**AP Chem**

RATES: If you double the concentration of reactant A in the reaction A + 2B C, what happens to the rate based on the rate law, rate = [A]2 [B]3? The rate would ___ by a factor of ___. increase, 2 increase, 4 decrease, 2 decrease, 4 I can't read some of the signs; however, ...
*Tuesday, January 23, 2007 at 9:43pm by Chemwiz*

**chemistry**

(B) is not in the rate expression; therefore, changing (B) will not affect the rate. If the rate order for A is 1, the answers are the same. If the rate order of A is 0, the rate doesn't depend on A or B.
*Thursday, November 18, 2010 at 1:23pm by DrBob222*

**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.
*Friday, February 24, 2012 at 8:19pm by bob*

**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*

**Math interest rate**

Please explian how to figure out the the initial interest rate of the ARM ? Given th these facts thanks :) Ben bought a home with an adjustable-rate mortgage. The margin on the loan is 2.7% and the rate cap is 7.2% The current index rate is 4.3%
*Wednesday, November 14, 2007 at 2:21pm by Anonymous*

**arts high enviromental science**

birth rate death rate immigration rate emigration rate
*Tuesday, March 9, 2010 at 7:27pm by Ms. Sue*

**Chemistry**

rate 1 = k*(PCl3)^0(Cl2)^y rate 2 = k*(PCl3)^0(Cl2)^y The problem says rate increases by 4 when we double Cl2. So let's do that. Let's call rate 1 = 1 to make things simple; also, since (PCl3)^0 = 1 we can dispense with that, too. Then we will call (Cl2)= 1 with rate 1, again...
*Wednesday, February 27, 2008 at 5:33pm by DrBob222*

**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**

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.. 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 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*

**math rate**

15 chapters in 5 days - I already know the unit rate is 3 - I have to give the rate and unit rate. I don't know how to figure out the rate. Can someone please help me? rate is 15 chapters/5 days unit rate is 3 chapters/day
*Sunday, March 4, 2007 at 8:52pm by brandon*

**chemistry **

Nitric oxide (NO) can be removed from gas-fired power-plant emissions by reaction with methane as follows: CH4(g) + 4NO(g) --> 2N2(g) + CO2(g) + 2H2O(g) Complete the equation relating the rates for each of the following: a) the rate of appearance of N2 to the rate of ...
*Monday, October 15, 2012 at 6:56pm by Brun*

**Chemistry- rate laws**

rate for second order rxn = k(A)^2 0.1 = k(0.01)^2 Solve for k. Then substitute k into rate = k(A)^2 with A = 0.5 and solve for rate. The answer is 250 which i 2.5E2.
*Tuesday, September 18, 2012 at 10:18am by DrBob222*

**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**

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**

I did 3 Experiments and got 3 rate as the following: Exp1: (S2O8)2-:0.05M; I-:0.05M rate:1.7x10^-5 M/s Exp2: (S2O8)2-:0.10M; I-:0.05M rate:3.4x10^-5 M/s Exp3:(S2O8)2-:0.05M; I-:0.10M rate:3.6x10^-5 M/s what effect does doubling [(S208)2-] have on the rate? By what factor does ...
*Friday, October 1, 2010 at 1:07pm by Kimberly*

**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*

**Finance**

Calculate die after-tax cost of debt under each of the following conditions: a. Interest rate of 13%, tax rate of 0% b. Interest rate of 13%, tax rate of 20% c. Interest rate of 13%, tax rate of 35%
*Sunday, December 5, 2010 at 4:17pm by Anonymo*

**physics**

Bernoulli's equation: mgh=1/2 m v^2 v=1.6g flow rate: I assume you mean mass flow rate, not volume rate. flow rate=density*velocity*areahole
*Sunday, January 6, 2013 at 1:15pm by bobpursley*

**math **

You want to explain to your friend that your banks interest rate has gone down from 1.2% to 0.3%. Which sentence below has the correct meaning? A)My interest rate has decreased 25%. B)My interest rate has decreased 0.9 percentage points. C)My interest rate is 0.9% of what it ...
*Thursday, May 9, 2013 at 5:32pm by jordan*

**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**

The reaction X + Y --> products was studied using the method of initial rates. The initial rate of consumption of X was measured in three different experiments. What is the value of the rate constant, k? *concentrations are in mol/L and initial rates are in molL-1s-1 Exp 1...
*Wednesday, February 23, 2011 at 10:51am by Jamie*

**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: double...
*Sunday, December 23, 2007 at 8:42am by Anonymous*

**chemistry**

What is the rate of the following reaction (M/s) if the rate constant for the reaction is 0.500 Lmol-1s-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*

**help**

The interest rate on a second mortgage was5 7/8 % last month. This month the interest rate is 7 3/2 %. How many percentage points has the interest rate increased? Are you sure you mean 7 3/2% ? No lender would write an intereest rate that way. Perhaps you typed a numerator or ...
*Monday, March 26, 2007 at 1:19am by carmen*

**chemistry**

rate F2 = 3.632L/2.040 min = ? (?/rate UF4) = sqrt(molar mass UF4/2*19) Solve for rate UF4 gas, then rate = 3.632 L/min. You have rate and L, solve for min.
*Tuesday, March 5, 2013 at 8:42pm by DrBob222*

**Dr.Bob222 Chem**

Yes and no. What I said, or should have said, is that changing the temperature by 10 C (approximately) doubles the rate. The question asked for the temperature at which the rate was doubled. So yes, the reaction rate is constant but ONLY for that particular temperature. At any...
*Friday, February 1, 2013 at 10:15pm by DrBob222*

**mba**

The payments are $95 in year 1, 2 and 3 and $150 in year 3.5. The purchase price is $500. 500 = 95/(1+rate) + 95/(1+rate)^2 + 95/(1+rate)^3 + 150/(1+rate)^3.5 Solving for rate, the rate comes to -4.98%.
*Sunday, September 27, 2009 at 2:28pm by jay*

**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**

The rate is the percent. So, if all you have to know is the definition of rate as given in your statement, then the rate is 15%.
*Thursday, October 23, 2008 at 11:25am by Feliz*

**Physical Science**

distance = rate x time 400 km = rate x 4.5 hours Solve for rate.
*Saturday, March 6, 2010 at 6:08pm by DrBob222*

**Chemistry**

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

**Geography**

What will the rate of natural increase be like if the birth rate is high and the mortality rate is low?
*Wednesday, September 4, 2013 at 5:53pm by Anonymous*

**Math**

If the Risk Free Rate is 2% and the expected inflation rate is 3%, what is the nominal interest rate? Please show formula.
*Wednesday, June 8, 2011 at 1:50pm by Susan*

**chem.**

the rate limiting step is unimolecular with A as the sole reactant. A+B-----C+D If A and B are both 0.200M, then the rate reaction is 0.0050M/s A. What is the rate of the reaction if A is doubled? B. starting with original concentrations what is the rate reaction id B is ...
*Friday, March 14, 2014 at 10:00pm by Anonymous*

**chemistry**

Wouldn't the rate of disappearance for H2O2 be the same as the rate of appearance of I2? And the rate of disappearance of I^- would be 1/2 rate of I2? Check my thinking.
*Friday, November 27, 2009 at 6:13pm by DrBob222*

**Math**

Tiffany can run 12 miles in the same time it takes her to bicycle 72 miles. If her bicycling rate is 20mi/hr faster than her running rate, find each rate. Let X = running rate, so X +20 = cycling rate. Since rate = miles/time, then time = miles/rate. Since the time for both is...
*Sunday, June 17, 2007 at 3:12pm by Audrey*

**Social Studies**

If I have birth rate, death rate, rate of increase in percent, how can I calculate the population doubling time?
*Saturday, November 17, 2007 at 4:09pm by Karen*

**Chemistry.. kinetics**

Typically, initial rate is the highest. Instaneneous rate is the unit in the differential equation that solves the rate law.
*Tuesday, July 21, 2009 at 5:39pm by bobpursley*

**chemistry**

O2 effuses at a rate that is _____ times that of Xe under the same conditions. rate 02/rate x2 = ?
*Friday, June 21, 2013 at 4:11pm by Annie*

**geography**

To maintain the current population density, which of the following must occur? a. The death rate must be higher than the birth rate. b. The birth rate must be higher than the death rate. c. The birth rate and death rate must stay the same with migration at 0. d. The birth rate...
*Saturday, November 5, 2011 at 1:27pm by lola*

**Math**

please check my answer thanks :) Juan bought a home with an adjustable-rate mortgage. The margin on the loan is 2.7% and the rate cap is 7.2% over the life of the loan. If the current index rate is 4.3%, what isthe initial rate of the ARM ? A. 7% B 9.9% C 14.32% My answer is I...
*Thursday, November 29, 2007 at 6:28am by Grace*

**chemistry**

Determine the overall orders of the reactions to which the following rate laws apply: a) rate= k[NO2]^2 b) rate = k c) k [H2][Br2]^1/2 d) k [NO]^2[O2] is it.. a. 2 b. 0 c. 1 1/2 d. 3
*Thursday, July 15, 2010 at 1:03am by Jin*

**Chemistry **

The rate equation is rate = k(CO)^x(O2)^y. Divide rate 2 by rate 1. 0.226/0.113 = 2 and 2 = (0.300)x(0.150)y/(0.150)x(0.150)y Note that 0.150y cancels with 0.150y and leaves just 2= (2)x and x must be 1. Do the same thing for rate 3 divided by rate 2 and determine y. You ...
*Thursday, June 30, 2011 at 11:11pm by DrBob222*

**Economics**

What rate does the FOMC set? Is the the Federal Funds Rate or the Discount Rate?
*Friday, September 25, 2009 at 5:05pm by Andy*

**Economics**

Risk rate is 2%, expected inflation rate is 3%, what is the nominal interest rate?
*Wednesday, June 8, 2011 at 6:51pm by Susan*

**math**

The difference in our two answers is explained this way: my answer of 16.18 % is the effective annual rate compounded once annually Ms Sue's rate of 15% is the annual rate compounded daily. Notice the significant difference in the stated rate. Although both answers are correct...
*Monday, November 26, 2012 at 5:08pm by Reiny*

**Math**

laura's rate --- 1/4 lucky's rate ---- 1/2 combined rate = 1/4 + 1/2 = 3/4 time at combined rate = 1/(3/4) = 4/3 hours (painting a house in 2 hours ??? , WOW)
*Monday, August 5, 2013 at 10:15pm by Reiny*

**MATH**

Jack's rate alone = 1/3 Marilyn's rate = 1/5 combined rate = 1/3 + 1/5 = 8/15 time at combined rate = 1/(8/15) = 15/8 = 1.875 hrs or 1 hour and appr 53 minutes
*Tuesday, April 2, 2013 at 9:51pm by Reiny*

**Chemistry**

What is the correct rate law for the following reaction? 2 NO2(g) + F2(g) → 2 NO2F(g) rate = kf(NO)2 rate = -kf(NO2)2(F2) rate = kf(NO2)2(F2) rate = -kf(F2) Not enough information is available to determine the rate law.
*Monday, May 16, 2011 at 9:52pm by dude*

**math**

What don't you understand about Diana's solution? Here is another way to look at it: Consider the equation: job = rate x time , or rate = job/time or time = job/rate sally" rate = job/4 john's rare = job/6 combined rate = job/4 + job/6 = 5job/12 time at that rate = job/(5job/...
*Wednesday, January 26, 2011 at 8:35am by Reiny*

**9th algebra**

jeff's rate = 1/4 wife's rate = 1/4 combined rate = 1/4 + 1/4 = 1/2 job done after 1 hr = (1/2)(1 hr) = 1/2 let son's rate be 1/x , (who is Rory ? ) combined rate = 1/4 + 1/4 + 1/x = 1/2 + 1/x = (x+1)/(2x) time for rest of job = (1/2)/combined rate) (1/2)/((x+1)/(2x)) = (1/2)(...
*Thursday, November 7, 2013 at 7:23pm by Reiny*

**Chemistry**

Graham's Law predicts that the ratio of the rate of effusion of gas X to the rate of gas Y equals the square root of the INVERTED ratio of their molar masses: Rate of X/Rate of Y = SQRT(My/Mx) What is the ratio of rate of effusion of Helium to Nitrogen gas? Enter your answer ...
*Sunday, October 28, 2012 at 8:20pm by Anonymous *

**MATH**

Rate Problem: Mr. Stewart rode a distance of 12miles out into the country on a bicycle and returned on foot. His rate on the bicycle was 4 times his rate on foot. He spent 5 hours on the entire trip. Find the rate of walking and on the bicycle.
*Tuesday, October 23, 2007 at 7:03pm by Michi*

**Econ**

e) i believe i is the domestic interest rate and ([1/E]-1) is the expected depreciation and 0.10 is the foreign interest rate. E i think is the spot exchange rate. I don't get why its asking for foreign interest rate again?
*Monday, July 21, 2008 at 6:56pm by Bo*

**Math**

Joey's rate = 1/4 Luigi's rate = 1/5 combined rate = 1/4 + 1/5 = 9/20 time at combined rate = 1/(9/20) = 20/9 = 2.2222.. hrs = 2 hours and appr. 13 minutes
*Friday, February 17, 2012 at 9:46am by Reiny*

**correction - math**

Brooke's answer makes no sense Frank's rate = 1/4 James rate = 1/6 combined rate = 1/4 + 1/6 = 5/12 time at combined rate = 1/(5/12) = 12/5 = 2.4 hours
*Monday, July 23, 2012 at 12:11am by Reiny*

**math**

well, vanessa worked for four days, so she did 4/12 of the job (1/3). So in the two-thirds left time=jobleft/rate where jobleft is 2/3 job and rate=vanessarate + susan rate or jobleft/2days=job/12days + susanrate or 2/3 job/ 2= job/12 + susan rate or susan rate= 2/6-1/12= 3/12...
*Thursday, September 25, 2008 at 6:11pm by bobpursley*

**Chemistry - Rate Determining Step**

According to the Liebig law of "Minimum" and the Blackman law of limiting factors, the rate of a multi-step reaction is determined by the step which has the lowest rate or velocity. This step is called the Rate-Determining or Rate-limiting Step.
*Tuesday, February 6, 2007 at 10:35pm by Hadi Farazdaghi*

**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 10^-1 (a) ...
*Wednesday, January 30, 2013 at 5:55pm by Hannah*

**Economics M/C**

Please help: If the rate of separation is 0.02 and the rate of job finding is 0.08 but the current unemployment rate is 0.10, then the current unemployment rate is __ the equilibrium rate, and in the next period it will move __ the equilibrium rate. a) above; toward b) above; ...
*Tuesday, October 25, 2011 at 1:06am by Anonymous*

**Math**

(1+ nominal rate)= =(1+ inflation rate)(1+ risk free rate)
*Wednesday, June 8, 2011 at 1:50pm by Mgraph*

**chemistry-rate of reaction**

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

**math**

the inteterst rate on an auto loan im may was 12 3/8%. by september the rate was up to 14 1/4%. how many percentage points did the interest rate increase over the period?
*Saturday, March 21, 2009 at 9:16pm by sara*

**calculus**

There is a right triangle with x and y legs labeled B and A, respectively. B is increasing at a rate of 1 m/s and A is decreasing at a rate of 2 m/s. At what rate is the angle theta (located on the leg B) changing when A is 10m and B is 20m?
*Wednesday, December 15, 2010 at 10:07pm by Nimra*

**interest rate**

let the monthly rate be i (1+i)^180 = 2 1 + i = 2^(1/180) = 1.003858.. so the monthly rate is .3858% giving us a rate of 4.623 % per annum, compounded monthly
*Saturday, November 13, 2010 at 10:27am by Reiny*

**AP Macroeconomics**

3. You buy a certificate of deposit (CD) that pays a nominal rate of 12% annually. You have a tax rate of 25%, so if the interest on this CD is taxable (which it may not be) your after-tax nominal rate is (1 25%) 12% = 9%. Since 10% equals .1, we can rewrite the equation ...
*Monday, October 21, 2013 at 4:11pm by Emily*

**calculus**

Most of the cells are on the edge,so A'=k(sqrt(A)) which implies that growth rate is proportional to diameter. growth rate= k(sqrt(A) * (9-A) growth rate ' = -ksqrtA+ k/2sqrtA * (9-A) set growth rate '=0 2A=(9-A) or A=3cm^3
*Wednesday, March 24, 2010 at 4:51pm by bobpursley*

**mathh (unit rate)**

$3/4lb unit rate 861 bagels/3d unit rate 850/1.25 unit rate
*Tuesday, August 22, 2006 at 11:03pm by Anonymous*

**Chemistry**

-rate A = -1/3 B = 1/2 C. Is that what you mean by "relative"? That means if A is disappearing at the rate of 0.480 M, then B is disappearing at the rate of 3*0.480M and C is appearing at the rate of 2*0.480M.
*Saturday, July 16, 2011 at 2:09pm by DrBob222*

**Chemistry - Rate Law**

The following example is given in my textbook: If a chemical equation is: NO2 (g) + CO (g) -> NO (g) + CO2 (g) The rate law is: Rate = k[NO2]^2 Usually you put in the reactants in their own sets of brackets, so why isn't the reactant CO involved in the rate law? I get it ...
*Wednesday, January 31, 2007 at 4:44pm by Belinda*

**Physics**

I do not understand your {\rm m} symbol. Compute the required angular rotation rate w, in radians per second. Then convert that w rate to rpm. I assume you know how to d that. The rate is given by R w^2 = g w = sqrt(r/R)
*Friday, June 10, 2011 at 11:36pm by drwls*

**math/unit rate**

please help me find the definition for unit rate. It depends upon what kind of unit. Go to www.google.com and type in unit rate. There is one source there for hotel unit rates, another for unit rates for the medical field, etc. You may also go to www.dictionary.com and type in...
*Tuesday, September 26, 2006 at 5:58pm by hannah*

**Math**

rate of 1st tap = 1/4 rate of 2nd tap = 1/6 rate of both taps = 1/4 + 1/6 = 5/12 time at combined rate = 1/(5/12) = 12/5 or 2.4 minutes
*Monday, February 4, 2013 at 5:27pm by Reiny*

**math**

I disagree with angela's answer When they ask for the effective rate, they are asking for the annual rate which is equivalent to the given compounded rate . This effective rate is often called APR 7% compounded dails i = .07/365 = .00019178 let the effective rate be r 1+r = 1....
*Tuesday, November 27, 2012 at 3:35pm by Reiny*

**7th Grade Math**

whenever there are not two distinct units, it would not be a rate, since there is no "per" involved 6m/3 = 2m, a length, not a rate 3/7 is a number, not a rate C/d = pi, a number, not a rate, since both top and bottom have the same unit (length)
*Thursday, September 20, 2012 at 9:18am by Steve*

**math**

janet rate: 1task/9hrs jancie rate: 1task/10hrs combinded rate=1task/hr (1/9+1/10) timecombined=1task/combinded rate careful with the fractions.
*Tuesday, November 18, 2008 at 10:09pm by bobpursley*

**Math**

How do I expres a rate as a unit rate Usually it is rate/unit said as "rate per unit." Examples are "miles per gallon" and "price per pound." I hope this helps. Thanks for asking.
*Tuesday, April 17, 2007 at 5:36pm by Adam*

**math help plz!**

DigiCom wants to drop the effective rate of interest on its credit card by 2%. If it currently charges a nominal rate of 8% compounded daily, at what value should it set the new nominal rate? Note: Please make sure your final answer(s) are in percentage form and are accurate ...
*Saturday, March 27, 2010 at 8:51pm by Amy*

**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 II**

rate = k(A)(B)^2 rate = k(4)(7)^2 rate = k*4*49 you finish
*Wednesday, September 30, 2009 at 1:35am by DrBob222*

**Foundations Math 12**

option A: semiannual rate --- i 15000(1+i)^10 = 20000 (1+i)^10 = 4/3 1+i = 1.029186 semi-annual rate is 2.9186 % annual rate is 5.8372 % option B, monthly rate is .004864.. 15000(1 + .004864..)^60 = 20069.53 so option B Since the annual rate is the same, clearly the more ...
*Sunday, February 16, 2014 at 7:39pm by Reiny*

**maths**

rate=amount/time rate combined=sum of rates=1tank/3.5hr+1tank/4.2hrs rate combined=(4.2+3.5)/(3.5*4.2) tanks/hr work this out. time= 1tank/(above rate)
*Friday, October 21, 2011 at 9:09am by bobpursley*

**chemistry**

3 CH3NH2 + 11 HNO3 ---> 3 CO2 + 13 H2O + 14 NO RATE OF DISAPPEARANCE OF NITRIC ACID IS 20M/min. what is the rate of reaction? at what rate is the concentration of carbon dioxide changing?
*Sunday, December 5, 2010 at 1:17pm by candace*

**Algebra 2**

The excursion boat on the river takes 2 hours to make the trip to a point 12 miles upstream and to return. If the rate at which the boat travels in still water is 5 times the rate of the river current, what is the rate of the current? Which of the following equations can be ...
*Saturday, October 13, 2012 at 2:09pm by Casey*

**Finance**

Find the future value of $10,000 invested now after five years if the annual interest rate is 8 percent. a. What would be the future value if the interest rate is a simple interest rate? b. What would be the future value if the interest rate is a compound interest rate?
*Wednesday, August 22, 2012 at 1:09am by tisha*

**math**

julie's rate = 1/4 pat's rate = 1/+ combined rate = 1/4+1/6 = 5/12 time at combined rate = 1/(5/12) = 12/5 12/5 = 2 hours and 24 minutes take it from there
*Monday, October 25, 2010 at 6:49pm by Reiny*

**Chemistry**

Choose a convenient volume such as 1 L. Then rate CO2 = 1L/200 s = ? rate unknown = 1L/280 s = (rate CO2/rate unk) = sqrt(MMunk/MMCO2) MM = molar mass. Solve for MM unk.l
*Monday, February 18, 2013 at 11:56am by DrBob222*

**VBS 2010**

Write a Web program to calculate the discount rate and interest rate for a bond. If a bond is purchased for n dollars and sold one year later for m dollars, then the discount rate is m-2/m and the interest rate is m-n/n, where each is expressed as a percent.
*Sunday, May 5, 2013 at 12:22pm by David*

**MATH**

THE INTEREST RATE ON AN AUTO LOAN IN MAY WAS 12 3/8 BY SEPTEMPER THE RATE WAS UP 14 1/4 % HOW MANY PERCENTAGE POINTDID THE INTEREST RATE INCREASE
*Sunday, January 17, 2010 at 12:55am by SHIRLEY*

**Chemistry(Please check)**

I don't think so. rate = k(A)^3 so k = rate/(A)^3 Plug in mol/L*min for rate and plug in moles^3/L^3 for A^3 and go through the algebra.
*Sunday, February 19, 2012 at 5:43pm by DrBob222*

**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*

**Math**

1. An assessment rate is 47%. The property tax is $39.94 per $1,000. What is the effective tax rate? Round to the nearest tenth of percent. 2. A property tax rate is $7.79 per $100 of assessed value. what is the tax rate as a decimal? Please help.
*Monday, April 14, 2014 at 1:55pm by Mer*

**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 rate of the ...
*Sunday, November 18, 2007 at 3:05pm by Dick Rogers*

**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*

**math**

The interest rate on an auto loan in May was 12 3/8%. By September the rate was up to 14 %. How many percentage points did the interest rate increase over the period?
*Friday, August 13, 2010 at 11:06pm by Anonymous*

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