Thursday
April 17, 2014

Search: Chemistry - Concentration and Time

Number of results: 142,226

Chemistry
Question: the rate constant for the second order decomposition of NOBr(g) is .800 1 divided by MS at 10 degree's C. Suppose a 2.50 L beaker contains NOBr at a concentration at .0680 moles per liter. How much time does it take for 75.0 percent of the sample to decompose. I know...
Monday, February 23, 2009 at 9:54pm by Eliz

Chemistry
a compound decomposes with half life of 8seconds and is independent of concentration.how much time is consumed to convert the concentration of one sixteenth of its initial concentration?
Tuesday, October 23, 2012 at 1:31pm by Maria

chemistry
In a reaction A to products, ,4.40 min after the reaction is started concentration of A is 0.588M. The rate of reaction at this point is rate= -change in concentration of A/change in time=2.2x10^-2Mmin^-1. Assume that this rate remains constant for a short period of time. A. ...
Saturday, January 18, 2014 at 2:07am by Temmi

chemistry
The initial concentration of the a substance was 1.95 M. After 27.72 hours the concentration was 0.9750 M. After anothers 55.44 hours the concentration was 0.4875 M (total time = 83.16 hours). If another experiment were conducted in which the initial concentration was 0.427 M...
Saturday, February 18, 2012 at 11:47pm by Derren

Chemistry
calculate the natural logarithm and reciprocal concentration at 0 seconds and NO2 concentration (M) of .8333 and at time 20 (seconds) and .4617 NO2 concentration (M)
Monday, July 22, 2013 at 5:42am by Alyssa

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 rate of the ...
Saturday, November 17, 2007 at 8:59pm by Dick Rogers

chemistry
ok i have a question. if i take the average of NaOh concentration then thats the concentration i was looking for right and then i use the same concentration oh NaOH with unknown concentration of H2SO4 to find its concentration ?
Saturday, December 22, 2012 at 3:10pm by Riana

calculus
c(t) = t^3 * 2^(-t/2) Find the initial concentration c(0) at time t=0 min. Finds the maximum concentration of the dye sand the time when this occurs.
Tuesday, April 20, 2010 at 5:02pm by Anonymous

chemistry
The first-order rate constant for photodissociation of A is 5.97 1/h. Calculate the time needed for the concentration of A to decrease to the following quantities. a. 5% of its original value h b. one-third of its initial concentration h
Tuesday, June 12, 2012 at 2:15pm by mel

Chemistry/Math
Write a differential equation describing a second order reaction – a reaction in which the rate of depletion of the concentration of the reactants depends on the square of reactants’ concentration. Solve this differential equation and hence find an expression for the ...
Monday, November 10, 2008 at 2:09pm by Alice

Math
A mathematical model for concentration of administered cortisone in humans over a 24-hour period uses the function C= [(D x a) / V(a-b)] (e^(-bt)-e^(-at) where C is the concentration, D is the dose given at time t=0, V is the volume of distribution (volume divided by ...
Thursday, February 13, 2014 at 4:00pm by Meli

Chemistry
I did this same experiment a couple weeks ago. We are measuring the amount of time it takes for the thiosulfate to run out. So to calculate the concentration of the thiosulfate ion. You can multiply the milliliters of thiosulfate in whatever trail you are calculating it for by...
Saturday, February 25, 2012 at 3:30pm by L.Bianchessi

chemistry
A) Calculate the hydrogen-ion concentration of a 5.45*10^-4 M H2CO3, solution, noting that Ka is bigger than Kb. B)What is the concentration of CO3^2-? after finding the concentration to A), do i use that concentration (M) as the initial M for CO3^2-? thanks in advnace
Monday, August 8, 2011 at 5:20pm by Henry

Chemistry
1.80*(59/268)=concentration concentration*(134/171)= concentration 2
Tuesday, March 19, 2013 at 9:49pm by Devron

Chemistry
The half-life for the second-order reaction of a substance A is 55.8 s when concentration of initial A = 0.69 M. Calculate the time needed for the concentration of A to decrease to the following values. (a) 1/8 of its original value (b) 1/9 of its original value
Wednesday, March 31, 2010 at 9:25pm by Val

polynomials & rational function
A drug is administered to a patient and the concentration of the drug in the bloodstream is monitored. At time t >= 0(in hours since giving the drug) the concentration is given by(in mg/L) c(t) = 5t / (t^2+1) Graph the function. From the graph, how do I find a)the highest ...
Friday, February 2, 2007 at 10:32am by Jen

chemistry
I - initial concentration C - change in concentration E - Equilibrium concentration
Wednesday, April 9, 2008 at 5:30pm by thatoneguy

Ap Chemistry
I have no idea where to start with this problem: A certain reaction has the following general form: aA -> bB At a particular temperature and (A)o = 2.00(10^-2)M, concentration versus time data were collected for this reaction, and a plot of In(A) versus time resulted in a ...
Tuesday, December 8, 2009 at 7:16pm by Shawn

AP Chemistry
I have no idea where to start with this problem: A certain reaction has the following general form: aA -> bB At a particular temperature and (A)o = 2.00(10^-2)M, concentration versus time data were collected for this reaction, and a plot of In(A) versus time resulted in a ...
Tuesday, December 8, 2009 at 9:04pm by Shawn

Chemistry
A sample of ammonia gas was allowed to come to equilibrium at 400 K. 2NH3(g) --> N2(g) + 3H2(g) At equilibrium, it was found that the concentration of H2 was 0.0584 M, the concentration of N2 was 0.0195 M, and the concentration of NH3 was 0.430 M. What was the initial ...
Monday, July 16, 2012 at 5:44pm by Blake

Chemistry
first dilution: you diluted it to 10/19 of .1M, so it is 10/190 M. Then you diluted it 10/100 of its concentration, new concentration 10/1900 M the statement <The student diluted the sample as above 1 time(s).>> makes no sense to me, it it means my first paragraph, ...
Monday, April 7, 2014 at 5:13pm by bobpursley

more chemistry this time concentration
Some of the problems. I honestly have no clue how to do these/where to look for answers. What is the concentration of 5.28*10^14 Carbon Tetrachloride molecules dissolved in 149 mL of water? How many grams of Carbon Dioxide will there be in a 16.43 mL of a .03M solution.
Tuesday, January 1, 2008 at 2:05pm by Justin

Chemistry
A solution with pH = 4 has 1. relatively high concentration of OH- 2. relatively low concentration of H3O+ 3. relatively high concentration of H3O+ 4. zero concentration of OH- Some of the answers people are giving me are confusing. I just need to know if it 1,2,3 or 4?
Saturday, October 22, 2011 at 7:26pm by nan

Chemistry
Aniline is a weak base, so I would tackle the problem this way. 14-pH=pOH pOH=-log[OH] Solving for OH concentration, 10^(-pOH)=OH concentration. B + H2O----> BH + OH Where B=aniline and BH= conjugate acid of aniline So, Kb=[BH][OH]/B The reaction shows that the ...
Wednesday, March 20, 2013 at 12:44am by Devron

Biotech
The dynamic method is used to measure kLa in a fermentor operated at 30degC. Data for dissolved-oxygen concentration as a function of time during the re-oxygenation step is given (table with time (s) and CAL (% air saturation)). The equilibrium concentration of oxygen in the ...
Tuesday, October 30, 2012 at 6:06pm by MGob

Chemistry
I have discovered a new chemical compound with the formula A2B. If a saturated solution of A2B has a concentration of 4.35x10-4M. a) What is the concentration of B2- ions? b. What is the concentration of A1+ ions? c. What is the solubility product constant for A2B? Can you ...
Sunday, March 16, 2014 at 8:31pm by Serena

Chemistry
1. In an equilibrium, A + B ---> C + D; "A" & "B" are mixed in a vessel at temperature "T". The initial concentration of "A" was twice the initial concentration of "B", & after the equilibrium has reached, concentration of "C" was twice the equilibrium concentration of "B...
Thursday, October 13, 2011 at 1:42am by Atul

Chemistry
How would you get the concentration(ppm) of a sample from absorbance? Absorbance of standard = 2.55 Absorbance of sample = 2.31 Wavelength of machine 345nm slit lenght = 1cm time = 2s The metal being tested is Copper and the concentration of the standard is 8ppm.
Wednesday, March 7, 2012 at 1:50pm by Lora

chemistry
the concentration of a chemical degrades in water according to order kinetics. the degradation constant is 0.2 day^-1. if the initial concentration is 100.0 mg/L, how may days are required for the concentration to reach 0.14 mg/L?
Saturday, January 15, 2011 at 4:34pm by Maria

chemistry
The concentration of a chemical degrades in water according to order kinetics. the degradation constant is 0.2 day^-1. if the initial concentration is 100.0 mg/L, how many days are required for the concentration to reach 0.14 mg/L?
Saturday, January 15, 2011 at 4:34pm by Maria

Chemistry
FIRST U should find whether there is reaction when they are mixed,and then what is the concentration of the mixture.next,find the concentration of H+ ion,finally,use this formular to solve your problem pH =-log[concentration of H+ ]
Sunday, February 26, 2012 at 2:27am by kate

Chemistry
I need help with a concentration question. I need to know how to calculate the product with the higher concentration. $6.50 for 185 mL and the concentration of the active ingredient is 0.005% OR $7.00 for 165mL and the concentration of the active ingredient is 0.700%. I need ...
Monday, August 30, 2010 at 5:17pm by Angie

chemistry
Can someone explain this to me? In the reaction: --> AgCl(s)<_______ Ag+(aq) + Cl-(aq) the shorter arrow pointing to the right shows that the qe. mixture consists mostly of ______. ---> In the reaction HC2h302 + H20<_______ H30+ + C2h302-, when the concentration of...
Sunday, July 20, 2008 at 4:24pm by Xi

chemistry 30 concentration of a product
calculate the concentration of the products of the following equilibrium when the equilibrium constant is 12.3 and the equilibrium concentration of nobr2 is 2.17 mol/l
Tuesday, November 6, 2012 at 9:18pm by Tara

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 be ...
Wednesday, March 31, 2010 at 9:52pm by Val

Chemistry
What would be the concentration of dinitrogen pentoxide after 6.00 X 10(2) seconds and how long would it take for the concentration of N2O2 to decrease to 10.0% of its initial value in the following equation... N2O5 to NO2 and O2 initial concentration is 1.65 X 10-2mol/L rate ...
Sunday, January 20, 2013 at 8:54pm by Chris

College Chemistry
For my homework I got this problem that my professor never went over in class how to do it and I don't know how to interpret it. A chemist runs a second order reaction of A->B starting at 10mili moles/L concentration of A (and no B). After one hour the concentration of the ...
Monday, May 24, 2010 at 8:54pm by Sarah

College Chemistry
For my homework I got this problem that my professor never went over in class how to do it and I don't know how to interpret it. A chemist runs a second order reaction of A->B starting at 10mili moles/L concentration of A (and no B). After one hour the concentration of the ...
Monday, May 24, 2010 at 11:19pm by Sarah

College Chemistry
For my homework I got this problem that my professor never went over in class how to do it and I don't know how to interpret it. A chemist runs a second order reaction of A->B starting at 10mili moles/L concentration of A (and no B). After one hour the concentration of the ...
Tuesday, May 25, 2010 at 3:02pm by Michelle

chemistry
A(g)+ B(g) <---> C(g) + D(g) Kc= 144. If .4 mol of A and B are placed in a 2 Liter container, what will be the concentration of C at equilibrium? I said the concentration of A= .2 because (.4/2=.2) and because 1 mol of A = 1 mol of C, the concentration of C also = .2 But...
Tuesday, November 23, 2010 at 11:48am by Audrey

chemistry
A(g)+ B(g) <---> C(g) + D(g) Kc= 144. If .4 mol of A and B are placed in a 2 Liter container, what will be the concentration of C at equilibrium? I said the concentration of A= .2 because (.4/2=.2) and because 1 mol of A = 1 mol of C, the concentration of C also = .2 But...
Tuesday, November 23, 2010 at 12:02pm by Audrey

chemistry
At equilibrium for the reaction A + 2B --> C + D <-- the concentration of A is 0.579 mol/L, the concentration of B is 0.598 mol/L, the concentration of C is 0.465 mol/L, and the concentration of D is 0.608 mol/L. What is the equilibrium constant for this reaction?
Tuesday, December 3, 2013 at 8:47pm by dakota

Chemistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 235.0 ppm and is initially uniform through the thickness of the steel. The atmosphere of...
Saturday, December 15, 2012 at 8:40am by Anonymous

Chemistry
M(OH)2---> M^+ + 2OH 14-pH=pOH 14-10.49=3.51 pOH=-log[OH] 10^(-3.51)=OH concentration OH concentration is twice as much as M from the reaction. Ksp=products/reactants=[OH Concentration]^2[OH concentration/2] I calculate 1.48 x 10^-11
Sunday, March 17, 2013 at 9:51pm by Devron

chem
H2o2+3i+2h -----> I3+2H2o In the first 10.0 second of the reaction the concentration of I dropped from 1.000M to 0.868M a) calculate the average rate of reaction for iodine in this time interval. b) Determine the rate of change in the concentration of H during this time ...
Tuesday, October 15, 2013 at 4:08pm by niki

chemistry
What would be the concentration of dinitrogen pentoxide after 6.00 X 10(2) seconds and how long would it take for the concentration of N2O2 to decrease to 10.0% of its initial value in the following equation... N2O5 to NO2 and O2 initial concentration is 1.65 X 10-2mol/L rate ...
Monday, January 21, 2013 at 11:57am by Chris

Chemistry
What happens to the hydroxide ion concentration in aqueous solutions when we increase the hydrogen ion concentration by adding an acid? Would it be good enough to answer by stating that the OH- ion concentration decreases, lowering the pH?
Tuesday, October 18, 2011 at 12:20am by Kevin

Chemistry
pH 4 is a weak acid, so there will be a relatively high concentration of H20 and H+ which makes H3O+. Therefore, there can't be a high concentration of OH-, but that concentration IS NOT 0, because the pH is not very low.
Saturday, October 22, 2011 at 7:26pm by Aaron

Chemistry
You are given a compound with an unknown concentration and you have five samples with known concentration of the compound. List 3 pieces of information you need to determine in order to calculate the unknown concentration spectrophotometrically.
Monday, March 4, 2013 at 4:05pm by Anonymous

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
Need some help. have the A part of the question but do not know how to set B or C. Butadiene (C4H6) reacts with itself to form a dimer with the formula C8H12. The reaction is second order in butadiene. If the rate constant at a particular temp is 0.04/(M s) and the initial ...
Thursday, April 22, 2010 at 8:10pm by Anna

chemistry
The H3o+ concentration of a solution is found to e 3.40*10^-6. What is the pH of the solution? what is the H3O+ concentration? what is the OH- concentration? is this and acidor a base?
Thursday, June 6, 2013 at 11:42am by Miranda

Chemistry
consider the equation for the following reaction at equilibrium. X+Y<-->2Z+heat the concentration of the product could be increased by 1.adding a catalyst 2.adding more heat to the system 3.increasing the concentration of Y 4.decreasing the concentration of X
Wednesday, March 9, 2011 at 5:40pm by Jazmin F.

Chemistry(Please check)
The initial concentration of a reactant in a first order reaction is 0.620 molar. What will be its concentration after 3 half-lives? I did 0.620 -> 0.31 ->0.155 0.155M will be the concentration. Is this correct?
Sunday, February 19, 2012 at 11:21pm by Hannah

Chemistry
A solution with pH = 4 has 1. relatively high concentration of OH- 2. relatively low concentration of H3O+ 3. relatively high concentration of H3O+ 4. zero concentration of OH-
Saturday, October 22, 2011 at 7:03pm by nan

chemistry
Q: Calculate the unknown molar concentration of CH3NH2 in MeOH titrated against a known molar concentration of HCl ? Could you please answer this, there are lots of examples around calculation PH of two known's but not so much of unknown concentration. thankyou.
Friday, August 24, 2012 at 8:05pm by jeffrey

College Chemistry
For my homework I got this problem that my professor never went over in class how to do it and I don't know how to interpret it. A chemist runs a second order reaction of A->B starting at 10mili moles/L concentration of A (and no B). After one hour the concentration of the ...
Tuesday, May 25, 2010 at 1:21am by Sarah

chemistry
Consider the following equation: N2O4(g)+ 2NO2(g) Kc= 5.8 x 10^-3 If the initial concentration of N2O4(g)= 0.040 M and the initial concentration of NO2(g) is 0 M, what is the equilibrium of concentration of N2O4(g)?
Saturday, July 3, 2010 at 3:00pm by Jim

Chemistry
Yes, exactly! Since we are diluting we can use M1V1=M2V2. So Concentration of thiosulfate X Amt.(volume) of added thiosulfate = (75ml)total volume X the Concentration of the new concentration of thiosulfate in the flask(what you are trying to find) The thiosulfate ...
Saturday, February 25, 2012 at 3:30pm by L.Bianchessi

chemistry
The carbon concentration in the steel before carburization is 366.5 ppm and is initially uniform through the thickness of the steel. The atmosphere of the carburizing furnace maintains a carbon concentration of 8040.0 ppm at the surface of the steel. Calculate the time ...
Sunday, December 16, 2012 at 9:13am by opppp

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
A solution of H2SO4(aq) with a molal concentration of 1.94m has a density of 1.119g/mL. What is the molar concentration of this solution? I got an answer of 2.17 M and it is incorrect..please help. My work: So Molar concentration = molal concentration * density = 1.94 mol/kg...
Saturday, February 18, 2012 at 9:26pm by Akle

Chemistry
What additional information would be needed to calculate the rate in units of concentration per time?
Thursday, February 9, 2012 at 4:38pm by Katie

chemistry
If a saline solution has a concentration of 0.25 g per mL, calculate the following. a) The concentration of this solution in %w/v. b) The concentration of this solution in grams per litre (g/L). c) The concentration of this solution in milligrams per mL (mg/mL).
Wednesday, November 7, 2012 at 6:10pm by Hannah

Chemistry
Recall that all aqueoous solutions contain_____. Water can also undergo ____. This process is called the ______of water. The reaction can be written as: Notice the double arrow in the reaction. This indicates that the reaction is_____. However, only a tiny fraction of water ...
Thursday, March 7, 2013 at 9:53pm by Kristien

Chemistry(Please respond)
.15M initial concentration of what? Or is it final concentration?
Wednesday, April 18, 2012 at 5:21pm by bobpursley

chemistry
In adsorption, what is bulk concentration? How does that differ from initial concentration? Thanks in advance.
Wednesday, July 11, 2012 at 10:38am by Namie

Chemistry
What is ΔG at body temperature (37.0° C) if the concentration of A is 1.7 M and the concentration of B is 0.50 M?
Saturday, September 8, 2012 at 1:29pm by amanda1012

chemistry
What do you have? %T and concentration, absorbance and concentration? something different?
Tuesday, November 6, 2007 at 4:50pm by DrBob222

chem
What relationship exists between H^+ ion concentration and OH^- ion concentration? Waht is the OH^- concentration of an aqueous solution with the H^+ concentration of 10^-4M. Calculate the pOH? Need help with this pls. thank you.
Wednesday, November 28, 2012 at 9:13am by chemdummy

chemistry
You have thrice the concentration of nitrate ions for the basic concentration value.
Tuesday, September 7, 2010 at 10:46pm by bobpursley

Chemistry
NO2 + NO = N2O3 Inital concentration 2.0, 2.0, 0 Change concentration , ,2.5 Equilibrium concent. , ,2.5
Sunday, September 25, 2011 at 11:15am by Sara

College Algebra
The concentration C of a certain drug in a patient's bloodstream t minutes after injection is given by C(t)=50t/t^2+25. Determine the time at which the concentration is highest. Round your answer to the nearest tenth of a minute.
Monday, October 22, 2012 at 3:18pm by Rene

Chemistry
After taking a medication its concentration in the bloodstream behaves as shown in the graph 650t/(t^3+200), where the x values are hours since first taking the medication and y is the concentration of the medication (mg/cc) in the blood stream after the given number of hours...
Monday, March 5, 2012 at 11:36am by Fatih

Chemistry
After taking a medication its concentration in the bloodstream behaves as shown in the graph 650x/(x^3+200), where the x values are hours since first taking the medication and y is the concentration of the medication (mg/cc) in the blood stream after the given number of hours...
Monday, March 5, 2012 at 5:08pm by Fatih

Chemistry
you are given the equation S2O3 + 2H --> S + SO2 + H2O you mix 25 ml of HCl with a concentration of 2 mol/L with 5 mL of Na2S2O3 with a concentration of 0.3 mol/L. what is the concentration of S2O3 and H?
Thursday, October 14, 2010 at 6:28pm by Samantha

chemistry
A 965 solution is diluted to a volume of 1.10 and a concentration of 8.00 . What was the initial concentration?
Sunday, July 22, 2012 at 9:50pm by Anonymous

Chemistry
In a given 1st order reaction A ---> products, the initial concentration of A is 0.40 M. What will be the concentration of A after 15 seconds if the half-life of the reaction is 3 seconds? I found the concentration to be 1.25 x 10-2 M But then how do I find the rate ...
Monday, February 18, 2013 at 7:37am by Marcus

chemistry
i have difficulties in this question.any help would be appreciated. 1) 2No(g)-> N2(g)+O2(g) at 1800K,K is 8.36*10^3.what concentration of NO(g) is in equilibrium with N2(g) at a concentration of 0.0500mol/liter and O2(g) at a concentration of 0.500 mol/liter?
Sunday, January 3, 2010 at 6:47pm by hrithik

chemistry
what is the relationship between reaction rate and shape of equilibrium graph in terms of concentration versus time?
Saturday, April 17, 2010 at 10:42pm by sarah

chemistry
what is the relationship between reaction rate and shape of equilibrium graph in relation to concentration vs time?
Sunday, April 18, 2010 at 6:38am by sarah

chemistry
Hmmm. I suspect you mean concentration of the iodate vs reaction time. Take your data, and plot it.
Wednesday, May 9, 2012 at 11:36am by bobpursley

Chemistry
A solution of H2SO4 with a modal concentration 6.25m has a density of 1.300 g/ml. What is the molar concentration?
Tuesday, July 12, 2011 at 4:06pm by Josh

Chemistry
A sample of Hydrochloric Acid (HCl) has a concentration of 5.00 %(m/v). Determine the molar concentration of the solution.
Wednesday, May 23, 2012 at 4:02pm by Josh

Chemistry
Dinitrogen pentoxide, N2O5, decomposes by first-order kinetics with a rate constant of 0.15 s-1 at 353 K. (a) What is the half-life (in seconds) for the decomposition of N2O5 at 353 K? (b) If [N2O5]0 = 0.0579 mol·L-1, what will be the concentration of N2O5 after 4.0 s? (c) How...
Friday, June 28, 2013 at 4:39pm by Sara

Chemistry
Dinitrogen pentoxide, N2O5, decomposes by first-order kinetics with a rate constant of 0.15 s-1 at 353 K. (a) What is the half-life (in seconds) for the decomposition of N2O5 at 353 K? (b) If [N2O5]0 = 0.0579 mol·L-1, what will be the concentration of N2O5 after 4.0 s? (c) How...
Friday, June 28, 2013 at 9:00pm by Sara

chemistry
Was the purpose of the experiment to find the concentration of vinegar or the concentration of NaOH? To make any sense out of all this we must know the concentration (molarity) in moles/liter of either the acid (vinegar) or the basic (NaOH) solution. I can't find it in the ...
Friday, June 12, 2009 at 1:51pm by GK

Chemistry -
If a solution is 0.25 M KOH...how can i figure out the hydronium concentration and hydroxide concentration? i'm confused..because isn't this a salt?
Sunday, May 17, 2009 at 1:24am by Lisa

chemistry
. What is the mass concentration (titer) is a solution of sulfuric acid with the molar concentration equivalent 0.5 mol/dm3?
Thursday, November 15, 2012 at 1:11pm by michelle

chemistry
determine the concentration of the salt water Express the concentration in both molarity in grams per liter
Monday, April 15, 2013 at 8:02pm by Elihu

Chemistry-Please help!
In a concentration cell, what would be the potential if we studied two solutions that had the same concentration?
Monday, August 12, 2013 at 8:29pm by Kelly

Chemistry
If the concentration of H3O+ is 3.5 X 10^-3 M. What is the concentration of OH-
Wednesday, April 28, 2010 at 9:05pm by John

Chemistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 359.5 ppm and is initially uniform through the thickness of the steel. The atmosphere of...
Sunday, December 16, 2012 at 11:27pm by Please Help Me!!!!!!!!

Chemistry
The question asks for the ksp, so don't I try to find the final concentration first? How do you take 100mL of each molar concentration?
Sunday, March 7, 2010 at 3:25pm by sh

Chemistry
Consider the HF solution with the concentration 5%(w/v). Calculate its concentration in the molarity. Use four significant figures in the answer.
Sunday, March 25, 2012 at 12:28pm by Lisa

chemistry
Consider the HF solution with the concentration of 5% (w/v). Calculate its concentration in the molarity. Use four significant figures in your answer
Friday, October 25, 2013 at 4:44am by Anonymous

CHEMISTRY
HOW CAN I WRITE UNCERTAINTY FOR CONCENTRATION? EXAMPLE: 0.0001 M +/- ? PLEASE EXPLAIN WHY....AND IS IT DIFFERENT FOR EACH CONCENTRATION? THAT IS WHAT ABOUT 0.00001 M? 0.01M?
Monday, January 13, 2014 at 11:34pm by Anonymous

Chemistry
Oh okay yeah I didn't add the 5.77x10^-3 to the weaker acid. So I determine concentration of stronger acid then put that H concentration into the weaker acid then I determine the concentration of the H of CH3COOH and get 7.02x10^-4 and add the H+ concentration of 5.77x10^-3 ...
Sunday, February 26, 2012 at 10:02pm by L.Bianchessi

chemistry help asap???
Why is boiling-point elevation a colligative property? a.It does not depend on the concentration of particles. b. is inversely proportional to the concentration of particles in a solution. c. It is directly proportional to the concentration of particles in a solution. d. It is...
Thursday, May 21, 2009 at 6:36pm by tim

Chemistry
The following reaction was monitored as a function of time: AB--->A+B A plot of 1/[AB] versus time yields a straight line with slope 5.2×10−2 . If the initial concentration of is 0.240M , and the reaction mixture initially contains no products, what are the ...
Sunday, July 18, 2010 at 5:30pm by Ellen

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