Search: Final-Chemistry

Number of results: 98,567

chemistry
You omitted some of the problem. initial T = 16 C p = 11.7 atm final pressure = ??, the unknown. final T = 16 (apparently doesn't change). initial volume = ? final volume = 1/4 the original volume. What I usually do is to assume a value for V1 (a convenient number of 4), ...
Sunday, October 17, 2010 at 8:20pm by DrBob222

Chemistry
a solution is prepared using .015 L of 1.0 M HCl and .020 L of .50 M HNO3. the final volume of the solution is 1.25 L. Answer th following questions. a)what are the [H3O+] and [OH-] in the final solution? b)What is the pH of the final solution?
Tuesday, May 4, 2010 at 7:18pm by Alexa

Engineering
use fomular P*v=n*R*T cause temperature and volumn not change: n(initial)=(P(initial)*V)/(R*T) n(final)=(P(final)*V)/(R*T) we want the final n, therefore: n(final)=P(final)*n(initial)/P(initial) =5.3*1.2/28.5=0.223
Friday, November 5, 2010 at 7:16pm by Calypso

Chemistry
How can I tell you the final volume without knowing the initial volume? You dilute it 60, meaning one part original,59parts solvent. so the final volume is sixty times the original. The final concentration is .2percentmilliosmoles
Saturday, May 18, 2013 at 5:39pm by bobpursley

Chemistry
A solution is prepared using 15.0 mL of 1.0 M HCl and 20.0 mL of 0.5 M HNO3. The final volume of the solution is 1.25 L. What are the [H3O+] and [OH-] in the final solution? What is the pH of the final solution?
Saturday, May 22, 2010 at 12:31pm by Heather

chemistry
if 200mg of HCl is added to water to achieve a final volume of 1.00 L, what is the final pH?
Saturday, January 15, 2011 at 12:39pm by Maria

working with data
josephs final averages in science class are shown in the table below. homework % toward final grade-20% average-93 quizzes % toward final grade-20% average-92 tests % toward final grade-40% average-85 final exam % toward final grade-20% average-? what is the minimum score ...
Sunday, February 24, 2008 at 4:45pm by mike

Chemistry
If you had shown your work we could find your error. And you MUST convert temperature of 65 C to Kelvin (273+65 = 338 K), solve for the new T, then subtract 273 from the final T to arrive at final C. I suspect you may not be converting the final K temperature back to C.
Sunday, February 20, 2011 at 10:30pm by DrBob222

chemistry
A solution of 0.178 M KOH(28.3 ml) is mixed with 28.9ml of 0.133 M HCl. Assuming that the final solution is the sum of the initial volumes, caculate: a)the molarity of the K+ cation b)the molatiry of the Cl- anion c)the pH of the final solution d)the pOH of the final solution
Wednesday, February 8, 2012 at 1:07pm by helen

sociology
Michael the final is in combination with the eth class, which is also a hard final, that's the final I need help with. The com 215 final is a power point presentation. I can't wait to get to an accounting class.
Thursday, July 20, 2006 at 7:06am by chrislm

Chemistry
"Something like" isn't enough for me to know. q = mass Al x specific heat Al x (Tfinal-Tinitial) If you used H2O to cool the Al you would need the mas of the H2O and the initial T of the H2O, then you could do the final T. Of course the final T of the water will ...
Thursday, February 21, 2013 at 5:16pm by DrBob222

Chemistry
If argon has a volume of 5.0 dm3 and the pressure is .92 atm and the final temperature is 30 degrees celcius and the final volume is 5.7 L and the final pressure is 800 mm Hg, what was the initial temperature of the argon?
Monday, November 19, 2012 at 7:28pm by Kaitlyn

chemistry
A 115 mL sample of a 10.0 M ethylene glycol (C2H6O2) solution is diluted to 1.30 L. What is the freezing point of the final solution? (Assume a density of 1.06 g/mL for the final solution.) What is the boiling point of the final solution? How would I go about setting this up? ...
Sunday, April 29, 2012 at 1:09am by Jen

Chemistry
Under constamt-pressure conditions a sample of hydrogen gas initially at 93 degress celcius and 8.1 L is cooled until its final volume is 1.7 L. What is the final temperature?
Saturday, June 19, 2010 at 8:46pm by Amanda

Chemistry
Please help! Thanks. An ammonia solution is made by diluting 0.105L of the concentrated commercial reagent until the final volume reaches 1.00L. What is the final molar concentration?
Sunday, July 19, 2009 at 2:36pm by Sydney

Chemistry
I have another question about this problem. I know that dT is (T(final)-T(initial)). is the T(final)=23C or is it 48C? since it's from "48C to 23C", shouldn't the final be 23C? and the initial 48C?
Thursday, September 8, 2011 at 1:16pm by Sam

Chemistry
If you dilute 45.5 mL of 9.0 M Na3PO4 to a final volume of 200 mL, what is the final concentration in units of molarity?
Monday, December 13, 2010 at 10:04pm by Stevi

Physics please check
Three moles of an ideal monatomic gas are at a temperature of 345 K. Then, 2531 J of heat are added to the gas, and 1101 J of work are done on it. What is the final temperature of the gas? delta U= 3/2nR(T final -T initial) (2531J - 1101J) = 3/2(3.0mol)(8.31)(T final - 345K) ...
Sunday, April 15, 2007 at 10:19pm by Mary

Chemistry
A 50 mL sample of 8% (m/v) NaOH is diluted with water so that the final volume is 200 mL...what is the final concentration and how did you figure it out?
Monday, May 9, 2011 at 4:55pm by Curlyqty

chemistry
A 60.0-g sample of NaOH is dissolved in water, and the solution is diluted to give a final volume of 1.50 L. The molarity of the final solution is ?
Thursday, December 10, 2009 at 2:16pm by Anonymous

Physics please check repost
Three moles of an ideal monatomic gas are at a temperature of 345 K. Then, 2531 J of heat are added to the gas, and 1101 J of work are done on it. What is the final temperature of the gas? delta U= 3/2nR(T final -T initial) (2531J - 1101J) = 3/2(3.0mol)(8.31)(T final - 345K) ...
Sunday, April 15, 2007 at 2:04pm by Mary

physics
Final K.E. = (spring potential energy) + (gravitational P.E. loss) - (friction work done) Get the final velocity from the final K.E.
Tuesday, June 12, 2012 at 2:53pm by drwls

Chemistry
A 5 mL sample of 50% (m/v) acetic acid (Hc2H3O2) solution is added to water to give a final volume of 25 mL....what is the final concentration?
Monday, May 9, 2011 at 5:41pm by Curlyqty

chem
You shouldn't have any trouble. Final molarity = final moles/final liters of solution. Post your work or detailed questions if you get stuck.
Sunday, April 26, 2009 at 4:05pm by DrBob222

Chemistry
Determine the final end (final) value of n in a hydrogen atom transition, if electron starts in n = 1 and the atom absorbs a photon of light with an energy of 2.044 X 10^-18J? A) 3 B) 4 C) 2 D) 6 E) 5
Monday, November 28, 2011 at 12:37pm by Nancy

chemistry
1/wavelength = R(1/n^2initial - 1/n^2final) R is the Rydberg constant. n final is the upper state n initial is the lower state, in this case 3. Plug in the numbers and solve for n final. Post your work if you get stuck.
Saturday, January 22, 2011 at 11:39am by DrBob222

Chemistry
you diluted it by a factor of 11, with one part original, ten parts water. Then, if the final concentration is.04M, the initial must have been .44M (11 times the final) Want to do it with Math? final solute= initial solute .04M*4.4L=?*.4L ?= .44M
Sunday, May 13, 2012 at 1:21pm by bobpursley

Physics
a) Work(total)= Final KE = (50*4+20*2) J = 240J b)Ek = 1/2 mv(final)^2 - 1/2 mv(initial)^2 v(final)^2 = Ek / 1/2 x 2 = 240 J / 1 = 240 V(final)= 15.5 m/s
Thursday, December 3, 2009 at 3:10pm by Madhawa

Physics
I have just recently had to answer a very similar question. My prof. has given me the two general eqns to use: Y(final)=Y(initial)+V(initial)((T(final)-T(initial))+1/2a(T(final)-T(initial))^2 and V(final)=V(initial)+a(T(final)-T(initial)) From there, write down your knowns and...
Monday, September 13, 2010 at 11:33pm by Alura

chemistry
No, the final volume will be the final volume. You STARTED with 4000 mL and the final volume is xxx; therefore, xxx - 4000 will be the mL that must be added. Technically, that isn't exactly right because the volumes usually are not additive but I think the intent of this ...
Tuesday, September 14, 2010 at 8:36pm by DrBob222

Chemistry
use mmoles as mmoles at end mus be same as at start. 100.0 ml x 0.2500 M = (final vol) x 0.3721 M so final volume = 100.0 ml x 0.2500 M/0.3721 M I got 53.75 ml as the final volume. hence you can calculate how much water has evaporated.
Thursday, May 5, 2011 at 9:56pm by Dr Russ

chemistry
Cid you mean, "The final answer is supposed to be in C?" Yes. Convert 80.1 C to Kelvin by adding 273.16, then convert back to C for the final answer.
Saturday, January 24, 2009 at 10:36pm by DrBob222

chemistry
Calculating final concentrations. Your instructor asks you to add the specified quantities of 2M Tris pH 8.0 buffer to 140 ml of distilled water. Calculate the final concentration and dilution factor of each solution. a)10ml b)20ml c)140ml
Monday, August 27, 2012 at 9:25pm by anonymous

chemistry
mLa x Ma = mbL x Mb Solve for mL which will be the final volume. Assuming the volumes are additive, the ADDED water will be final volume - 10 mL.
Thursday, February 10, 2011 at 10:11pm by DrBob222

math
An instructor counts homework as 1/3 of the student's grade and the final exam to be 2/3 of the student's final grade. Going into the final exam a student has a homework grade of 48%. What range of scores on the final exam would put the student's final average ...
Sunday, September 30, 2007 at 8:08pm by Jessica

chemistry
hi, i was wondering if anyone could help me with this problem? i am having some difficulty with it. thanks. a).how many grams of Al(NO3)3 are needed to prepare 300mL of a 1.071 M solution? b).if you further dilute this 300mL to a new final volume of 5.0L, calculate the final ...
Tuesday, March 4, 2008 at 10:35pm by tina

chemistry
Say we want to dilute a 1 M solution from 10 to 100 mL. The final concn will be 1M x (10/100) = 0.1M 10 is initial volume. 100 is final volume 1M = initial M 0.1M is final M So plug in the numbers from the example problem I've worked and see if the statement is true or ...
Wednesday, March 9, 2011 at 5:32pm by DrBob222

chem
Doesn't the final concn depends upon the final volume. You tell us you diluted the solution with 0.4 M HCl but to what final volume?
Monday, August 2, 2010 at 6:07pm by DrBob222

chemistry class
i have a Chemistry lab (level 2) final exam soon. our teacher told us that we would have % transmittance problems, can someone show me an examples (maybe from an online test) or a made up one, of what i might expect to find on my chemistry lab final? like an examples of a % ...
Wednesday, December 1, 2010 at 4:53pm by jes

Chemistry
Almost. Yes, you add atomic mass Na to atomic mass Cl. Weigh that amount of NaCl, dissolve it in a litle water, then make to a final volume of 1 L. Note tht this is NOT the same as adding 1 L of water. If you weigh 1 mol NaCl and add 1 L water the final volume will be MORE ...
Tuesday, August 28, 2007 at 9:10pm by DrBob222

Chemistry
A 45kg sample of water absorbs 364kJ of heat. If the water was initially at 28.2 Celcius, what is its final temperature? How do I figure this out....HELP!
Monday, January 21, 2013 at 6:06pm by Final Water Temperature

Physics (Mechanics) - unanswered
I assume you are a calculus person. work done on electron= final KE of electron and from final KE, you calaculate the velocity. What is work done on the electron? work= intgeral force dot dx integrated from original distance to final distance. Now the final distance here is ...
Friday, April 13, 2012 at 10:45am by bobpursley

Chemistry
Add eqn 1 as is to 3x eqn 2 to 2x the reverse of eqn 3. That will give you 2x the equn you want so take 1/2 of the final equation. When reversing an equation, change the sign of dH. When multiplying an equation, multiply dH by the same number. Add all of them take 1/2 final ...
Wednesday, March 7, 2012 at 9:21pm by DrBob222

Chemistry
Ten kilograms of hydrogen gas are mixed with 355 kg of chlorine in a 0.50 mm^3 drum. The two gases react to produce hydrogen chloride. What is the final pressure in the drum if the final temperature is 60 degrees celcius?
Sunday, March 13, 2011 at 12:32am by Maria

physics 111
average velocity=(velocityfinal -velocityinitial)/2 velocity final= .678/4 *direction of final run what is the final direction? Well , he has ran .678mi, which is .678/.508 revolutions, or 1 and a third rev, or a final angle of 120 deg. He is sruning at a 90 degree angle to ...
Friday, September 14, 2007 at 1:56am by bobpursley

Chemistry
Q=mc∆t where Q=heat m= total mass c=specific heat of solution= 4.186 x 10^-3 kilojoule/gram °C ∆t=final temp- initial temp solve for final temperature
Thursday, October 7, 2010 at 7:07pm by TutorCat

Physics repost please check
Three moles of an ideal monatomic gas are at a temperature of 345 K. Then, 2531 J of heat are added to the gas, and 1101 J of work are done on it. What is the final temperature of the gas? delta U= 3/2nR(T final -T initial) (2531J - 1101J) = 3/2(3.0mol)(8.31)(T final - 345K) ...
Monday, April 16, 2007 at 6:34pm by Mary

chemistry
When a solution is diluted with water, the ratio of the initial to final volumes of solution is equal to the ratio of final to initial molarities. true or false?
Wednesday, March 9, 2011 at 5:32pm by KRisten

Physics
Write two equations of conservation of momentum in both the north-south (y) and east-west (x) directions. There will be two unknowns: the x and y components of the final velocity. Each equation can be solved for one final velocity component. (The combined final mass is 3570 kg...
Sunday, December 7, 2008 at 1:15pm by drwls

Chemistry
I'm having trouble once i get to T(final)=-14.998 X T(final) + 14.998 X T(initial h2o) + T(initial Al) Any suggestions?
Sunday, April 24, 2011 at 5:50pm by Phillip

Chemistry
It took 400 calories of heat to raise 50 mL of water from 20 degrees Celsius to its final temperature. What was that temperature? Ok I understand the equation q=mass x SH x change in temp. I am lost on how to set it up to find my final temp. Please help.
Monday, March 14, 2011 at 2:45pm by Shambrey

CHEMISTRY
If a Li 2+ ion, initially in the 2nd excited state absorbs a photon of light with a fequency of 2.82 X 10^6 GHz, what will be the final energy level for this electron? Show all stepts to get final energy level. i have no clue what this question is even asking :[?
Wednesday, November 7, 2007 at 7:14pm by Kate

uhd
int carry=0; int prod,i,j,rem; int base=10; else if ( op == '*' ) //checks for operator, performs array multiplication { for(i=size-1; i>-1;i--) { for(int j=size-1; j>-1;j--) { prod =firNum[i]*secNum[j]; prod += carry; if(prod>=base) { carry = (...
Thursday, February 16, 2012 at 6:34am by sardar

chemistry
A chemist must dilute of M aqueous magnesium fluoride solution until the concentration falls to M . He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in liters
Monday, December 3, 2012 at 3:21pm by jay

chemistry
A graduated cylinder was used to transfer 201 mL of a 0.478 M solution of KCl to a beaker which was subsequently diluted to a final volume of 1.092 L. What is the final molarity of the KCl in the beaker after the solution is thoroughly mixed?
Wednesday, February 8, 2012 at 11:08pm by Alex

AP CHEMISTRY
If a Li 2+ ion, initially in the 2nd excited state absorbs a photon of light with a fequency of 2.82 X 10^6 GHz, what will be the final energy level for this electron? Show all stepts to get final energy level. i have no clue what this question is even asking :[?
Wednesday, November 7, 2007 at 9:25pm by Kate

Physics(Please respond)
Initial PE-friction+workadded=final PE+final KE let point A be at Height=0, point B is then (+29.4-3.82) 0-1.82E4+5.49E4=mg(29.4-3.82)+final KE solve for final KE
Saturday, June 2, 2012 at 8:49pm by bobpursley

Science
final velocity = initial velocity + (acceleration due to gravity x time) final velocity= 0 m/s +(-9.8 m/s^2)(2 s) final velocity = -19.6 m/s or 20 m/s answer (D)
Monday, August 27, 2012 at 9:26pm by Charrice

Chemistry
Hess' law. Multiply equation i by 2 (multiply H by 2 also) and add to equation ii. That will give you the equation you want so delta H for the final reaction is the sum of 2*i + ii = final rxn.
Wednesday, April 6, 2011 at 11:58am by DrBob222

physics
A runner, beginning at rest, completed a 50 m run with a final speed of 6 m/s. Assuming constant acceleration. a) What was the average speed of the runner? b) What was the runner's time? c) What was the acceleration? a) half the final speed b) distance/(average speed) c) (...
Monday, October 2, 2006 at 11:04pm by maria

chemistry
A solution is prepared by adding 1.00 g of solid \rm NaCl to 50.0 mL of 0.100 M \rm {CaCl_2}. What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 m
Sunday, October 2, 2011 at 1:52pm by jared

Physics to bobursley
can u go back to my problem and explain it differently because my teacher has only taught us 4 equations of motion and they r d=(v intial +v final)/2 times t, v final=v intial+at, d= v intial(t)+1/2at^2, v final^2=v intial^s + 2ad
Wednesday, September 17, 2008 at 3:58pm by Barndon

chemistry
15ml of 0.325M NaOH is delivered into 35ml HOBr solution of unknown concentration.The pH of the final solution is 7.48. Ka for HOBr is 2.0 x 10-9at 25C. Find the number of moles of OBr- and HOBr in the final solution.
Thursday, February 24, 2011 at 5:40pm by bridget

Chemistry
Anya, do you know how to do number 4 on the final chemistry exam. Please tell me.
Thursday, December 13, 2012 at 2:35am by Anonymous

chemistry
Reactants for the following reaction are placed in a 10.0 L flask held at 250 degrees C and at initial partial pressures of 1.00 atm each. Calculate the final pressures of each reactant and product, assuming the reaction goes to completion. 4 N2O(g) + CH4(g) = 4N2(g) + 2H2O(g...
Thursday, November 11, 2010 at 11:17pm by Kyle

Chemistry
I got the correct answer by making a simple Initial/Final chart. the initial [Ni^2+] = 1.30, the final [Ni^2+] = 0.500. The change is 0.80 M. This means you would add 0.80 to the initial [Zn^2+] (which is .100 M) and you would get a final [Zn^2+] of 0.90 M. The next step is to...
Sunday, April 17, 2011 at 5:26pm by Arthur

Chemistry
If your solution’s final volume of 32.55 mL yields 3.6 grams of AgCl, determine the Molarity of the final solution. Also, how many milliliters of a 1.85 M solution of AgNO3 did you add to an excess of aqueous NaCl to provide the 3.6 grams of AgCl?
Tuesday, March 26, 2013 at 12:08am by Shoba

Chemistry
Display the final answer in correct scientific notation and show correct number of significant figures in the final answer: 6.0223010000 x 10-24 x 2.222090001 x 10-30 I get this far and then get stuck: 13.3820948351123 x 10 -54
Wednesday, February 22, 2012 at 8:18pm by Susan

Chemistry
I think I have the answer to this question but need some help! Display the final answer in correct scientific notation and show correct number of significant figures in the final answer: 6.0223010000 x 10-24 x 2.222090001 x 10-30
Wednesday, February 22, 2012 at 5:42pm by Susan

statistics
In a large class, there were 220 students who wrote both the midterm and the final exam. The standard deviation of the midterm grades was 14, and that of the final exam was 20. The correlation between the grades on the midterm and the final was 0.60. Based on the least squares...
Saturday, September 22, 2012 at 1:20am by ashik

Chemistry
total volume = 1.775 L final concentration (CH3COO)= .169859 final concentration (CH3COOH) = .60112676 pH= -log(1.7*10^-4) + log(.169859/.60112676) = 3.22 is this correct?
Saturday, March 12, 2011 at 10:41pm by Anonymous

Chemistry
The part dealing with 0.5 g would be 1 place (unless as I said before you actually had 0.500 g and just neglected to type in the zeros). The part dealing with 1.69 g would be 3 places. Since the 1.69 part is the limiting reagent, then that is the only calculation that matters ...
Wednesday, November 5, 2008 at 9:33pm by DrBob222

Chemistry
If 125mL of a 1.10 NaCl solution is mixed with 105mL of a 0.850M CaCl2 solution but NO reaction takes place, calculate the final concentration of each of the ions in the final solution. Please reply with the steps on how to do this question so I can learn. I can't find ...
Thursday, June 14, 2012 at 3:25pm by bri

Chemistry
Technically this problem can't be worked without know the density of the solution or the final volume. We will assume that the final volume is 1L. moles HCl = grams HCl/molar mass HCl. Then M HCl = moles/L soln Finally, pH = -log(H^+)
Wednesday, June 29, 2011 at 12:31pm by DrBob222

Physics
Starting potential energy less the work done on the way down equals the final kinetic energy. From the final kinetic energy, you can compute the final velocity.
Monday, March 29, 2010 at 7:43pm by bobpursley

Chemistry
How many milliliters of glacial acetic acid (17.3 M) would you need to titrate an aqueous solution of 100 grams sodium acetate (MW = 82.0 g mol-1) to get a final pH of 5.00 and a final volume of 1.00 liter? The pK’ for acetic acid is 4.76. Show your work.
Monday, September 10, 2012 at 1:10am by Trey

Chemistry
Yes, that is correct(almost); however, you have used too many significant figures. The 49.36 number limits the number of s.f. to four; therefore, you may have only four in the final answer. That means you should round your final answer to 2.282 g KHP.
Saturday, December 1, 2012 at 9:16am by DrBob222

algebra
the final exam in a course will count as 30% of the total. prior to the final exam, 245 points are possible. how many points will the final exam be worth?
Saturday, October 9, 2010 at 12:29pm by paul

Chemistry. Please help
How many milliliters of glacial acetic acid (17.3 M) would you need to titrate an aqueous solution of 100 grams sodium acetate (MW = 82.0 g mol-1) to get a final pH of 5.00 and a final volume of 1.00 liter? The pK’ for acetic acid is 4.76. Show your work.
Monday, September 10, 2012 at 8:33am by Trey

Desperate chemistry
How many milliliters of glacial acetic acid (17.3 M) would you need to titrate an aqueous solution of 100 grams sodium acetate (MW = 82.0 g mol-1) to get a final pH of 5.00 and a final volume of 1.00 liter? The pK’ for acetic acid is 4.76. Show your work.
Monday, September 10, 2012 at 1:34am by Trey

chemistry
Delta (triangle) E is the change in internal energy. E(final)-E(initial) 25-12= 13 = E(final) 13-25= -12kj= Delta (triangle)E
Tuesday, April 16, 2013 at 9:33pm by J

chemistry
25.00 mL of a 2.00 M solution of NaCl is diluted to a final volume of 100.0 mL. What is the concentration of NaCl in the final solution?
Tuesday, December 7, 2010 at 6:03pm by Lia

physics
Total or separately? Write the two equations of conservation of momentum in x and y directions. Sinc e you know the final directions, you can solve for the two unkonwn speeds. With the final speeds, you can compute the final kinetic energy of each person
Friday, February 10, 2012 at 2:11pm by drwls

Chemistry really desperate
How many milliliters of glacial acetic acid (17.3 M) would you need to titrate an aqueous solution of 100 grams sodium acetate (MW = 82.0 g mol-1) to get a final pH of 5.00 and a final volume of 1.00 liter? The pK’ for acetic acid is 4.76. Show your work.
Monday, September 10, 2012 at 2:20am by Trey

chemistry
A chemist must dilute 55.6 ml of 1.48 M aqueous silver nitrate (AgNO3) solution until the concentration falls to 1.00M. He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in milliliters. Round your ...
Friday, August 31, 2012 at 8:28pm by Lizzy

Organic Chemistry
Another argument I just overlooked is that one of the reactants, cinnamaldehyde, contains a trans structure around the c=c double bond that is preserved in the final compound, 1,4-Diphenyl-1,3-butadiene. Thus, we cannot have two cis structures in the C=C-C=C chain which is the...
Thursday, July 24, 2008 at 8:54pm by GK

Ap chemistry
15 ml of .325 M NaOH is delivered into a 35 ml HObr solution of unknown concentration.The pH of the final solution is measured to be 7.48.Ka for HOBr is 2.0 * 10^-9 at 25C. Find the number of moles of OBr- and HOBr in the final solution
Saturday, February 18, 2012 at 7:33pm by Jdawg

Chemistry
Sometimes the ground state configuration IS the final configuration. The ground state exists when all of the electrons are at their lowest level possible. When they move out of those positions, they are excited electrons (technically, the atom is excisted). This usually is not...
Sunday, December 12, 2010 at 9:05pm by DrBob222

chemistry
loss of heat by copper + gain of heat by water = 0 massCu x specificheatCu x (Tf-Ti) + massH2O x specific heat water x (Tf-Ti) = 0 mass Cu = 250.0 g sp. h. Cu = 0.385 J/g*C in my table. Tf = final T Cu --solve for this Ti Cu = 100 C. mass H2O = 325.0 g sp.h. H2O = 4.184 J/g*C ...
Sunday, February 10, 2008 at 12:51am by drbob222

Math
The following scores were recorded on a 200-point final examination:193,185,163,186,192,135,158,174,188,172,168,183,195,165,183. Find the final examination score. Find the median final examination score. Is the mean or median a more useful representative of the final ...
Friday, February 15, 2008 at 4:39pm by Tim

Statistics
In Professor Smith's statistics course, the correlation between students' total scores before the final exam and their final exam scores is r = 0.67. The pre-exam totals for all students in the course have a mean of 275 and a standard deviation of 26. The final exam ...
Sunday, February 1, 2009 at 2:45pm by Jannel

Physics
I'm stuck on this problem. "You mix 100 ml 60 degree C water with 100ml 20 degree C water. Find the final temperature" Changing 100 ml to .1kg, I set .1*4186*(60-final temp.) + .1*4186*(final temp-20)=0 but my t's cancel out. I know it would work if I set my ...
Tuesday, April 28, 2009 at 2:59pm by Brigid

Physics
Delta U would be 2531J + 1101J instead of 2531J - 1101J, because the system is doing work instead of having work done to it. (2531J + 1101J)= 3632J 3632J = 3/2(3.0mol)(8.31)(T final - 345K) 3632J = 37.395(T final - 345K) 3632J/ 37.395 = T final - 345K 97.12 + 345K = T final ...
Sunday, April 15, 2007 at 10:19pm by Cale

managerial economics
Final Project A Final Project Is Due The Last Class Session. In Your Final Project, Describe And Answer In Economic Terms A Managerial Decision You Have Knowledge About (For Example One That Has To Be Made At Your Place Of Employment). Some Examples Essays and Term Papers
Monday, February 7, 2011 at 5:20pm by Anonymous

Chemistry
A spherical rubber balloon has an initial thickness of 0.45mm, and diameter 250mm. Final diameter of 1000mm. Find final thickness, true stress in the plane of the balloon wall, Air pressure required. (Assume rubber is idea and obeys Guassian statistics, and take the shear ...
Thursday, May 6, 2010 at 9:05am by nick

chemistry
A spherical rubber balloon has an initial thickness of 0.45mm, and diameter 250mm. Final diameter of 1000mm. Find final thickness, true stress in the plane of the balloon wall, Air pressure required. (Assume rubber is idea and obeys Guassian statistics, and take the shear ...
Wednesday, May 5, 2010 at 11:22am by nick

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