Number of results: 19,636
Mathematics
The simplest way to do this is as follows. We have f(x) = (2x^4-2x^3+x)/((2x-1)^2(x-2)) and want to write f(x) in partial fractions. Now, each partial fraction is a term like 1/(a + b x) and then it is clear where this function has a singularity. If you then expand the ...
Wednesday, October 1, 2008 at 6:25pm by Count Iblis
Maths
If z=(x^n) f(x/y), where f is an arbitrary function, show that: x(partial z/partial x) + y (partial z / partial y) = nz Can someone please show me how to work it out? Thanks!
Wednesday, February 3, 2010 at 10:31am by Claire
partial fractions
(7x^2-16)/(x^2-2x) solve by using partial fraction decomposition. i cant figure out how to do this because after i split up the bottom the A and B dont end up having an x^2 in order to equal the numerator of the original fraction. so confused!
Wednesday, July 20, 2011 at 11:44am by gabs
Math- Partial Fractions
3) is perhaps more interesting to do, as it's already factored you can just go ahead and solve this in the usual way. But there exist a much faster way to compute partial fraction expansions, which generalizes the method used by Reiny where you insert for x the critical ...
Thursday, April 4, 2013 at 11:24am by Count Iblis
chemistry
The time dependent concentration of solute particles in a solution is given by c(r, t) = [n/8(pi D t)^(3/2)] e^(-r^2 /4 D t) where r^2 = x^2 + y^2 + z^2 with x, y, and z being the values of three components of the position in the Cartesian coordinate system. a) Show that the ...
Wednesday, December 2, 2009 at 3:45am by drifting
function ( partial fraction)
if f(x) ax^2+bx+c , g(x) :1/3x^2+2 and fg(x)= 18x^4+24x^2+11/(3x^2+2)^2. find a ,b and c
Saturday, December 17, 2011 at 6:52am by kingwendu
Science
According to dalton' for partial pressure formula is partial pres.= vapour pres.* mole fraction of component so we can't get partial pressure of component from density (jay hind)
Wednesday, February 2, 2011 at 4:44am by Sandip patel
Mole fractions in a liquid mixture:
Calculate moles acetone. Calculate moles ethyl acetate. Add mole acetone to moles ethyl acetate for total moles. Now you are set up. A. liquid mole fraction acetone = moles acetone/total moles. mole fraction ethyl acetate = moles ethyl acetate/total moles. Part B. vapor vapor...
Thursday, September 2, 2010 at 4:37pm by DrBob222
Calculus
The integrand is: f(x) = (x^4+6x^3+5x^2+8)/(x^2+6x+5) The denominator can be factored as: x^2+6x+5 = (x+1)(x+5) This means that f(x) has singularities at x = -1 and x = -5, if the numerator isn't zero there. To find the partial fraction expansion, you can simply calculate ...
Tuesday, September 20, 2011 at 12:28pm by Count Iblis
Maths-Integration by Partial Fraction
Use integration by partial fractions to find Integral (3x^2-x+2)/(x-1)(x^2+1) dx
Wednesday, December 12, 2012 at 6:15pm by Anonymous
CHEMISTRY
partial pressure is directly related to mole fraction. partial pressure of Kr = 6.7-1.6-2.8 molefractionKr=partialpressureKr/6.7atm
Saturday, May 12, 2012 at 4:55pm by bobpursley
physics
Part (a) of the figure below is a partial graph of the position function x(t) for a simple harmonic oscillator with an angular frequency of 1.00 rad/s; Part (b) of the figure is a partial graph of the corresponding velocity function v(t). The vertical axis scales are set by xs...
Friday, February 4, 2011 at 9:27pm by rock
chemistry
Oxygen in the air is O2 like wise nitrogen is N2. mole fraction = n (mole of 1 component) / N (total mole of all components) Oxygen mole = 21 g /(32g/mol)=0.66 mole Nitrogen mole = 78 g / (28g/mol) =2.78 mole Argon mole = 1g / (40g/mol) =0.025 total mole =0.66 + 2.78 + 0.025 =...
Thursday, August 11, 2011 at 6:04am by student
Calc
Classify all critical points of the function f(x,y)=x^2-y^2+4x-2y+1. I know I have to take the partial derivative and set them equal to zero to get my points and then use the Hessian. For some reason I am not getting the correct answer. partial d/dx 2x+4 and partial d/dy 2y-2 ...
Sunday, December 9, 2007 at 8:23pm by Britt
chemistry
The atmosphere composition is % by volume, not by mass. If we take the gases as ideal gases then because the same volume of any gas contains the same number of moles the % by volume is also the % by mole, and hence fraction by mole. 0.21 mole 0.78 mole 0.1 mole Thus because ...
Thursday, August 11, 2011 at 6:04am by Dr Russ
CHEM HELP
The partial pressure of water above a solution of water and a nonvolatile solute at 25oC is 19.2 mm Hg. What is the mole fraction of the solute please help....I really don't know how I am supposed to solve this question. I know that Partial pressure of the solvent above a ...
Friday, February 13, 2009 at 11:35pm by jerry
Physics
Figure a is a partial graph of the position function x(t) for a simple harmonic oscillator with an angular frequency of 1.75 rad/s; figure b is a partial graph of the corresponding velocity function v(t). The vertical axis scales are set by xs = 2.50 cm and vs = 2.50 cm/s. ...
Friday, March 16, 2012 at 3:12am by Anna
AP Chemistry
Convert moles CH2Cl2 to mole fraction. moles fraction CH2Cl2 = moles CH2Cl2/total moles. Convert CH3Br2 to mole fraction the same way. Then calculate the partial pressure of each gas. PCH2Cl2 = XCH2Cl2*Po(pure solvent). Do the same for CH2Br2, then add the partial pressures to...
Monday, March 22, 2010 at 10:31pm by DrBob222
Chem
A gas mixture in a 3.100 L container at 415°C contains 1.30 g each of Ar, CO, and CH4. Find the partial pressure of Ar (in atmospheres). Find the total pressure of the gas mixture (in atmospheres). Find the mole fraction of CO. Do I use PV=nRT for partial pressure and if I...
Thursday, November 1, 2012 at 10:03am by Anoynmous
Algebra-Partial Fractions
Can you please help me with the following questions please, I dont understand them. I know the general rule about them. Write the partial fraction decomposition of the rational expression. (x^2+4x-1)/(x^2+3)^2 (4x^3+4x^2)/(x^2+5)^2
Monday, November 19, 2007 at 7:32pm by Soly
Partial Decompostion Fractions
Can you please help me with the following questions please, I dont understand them. I know the general rule about them. Write the partial fraction decomposition of the rational expression. (x^2+4x-1)/(x^2+3)^2 (4x^3+4x^2)/(x^2+5)^2
Saturday, November 17, 2007 at 9:34pm by Soly
Chemsitry II
mole fraction is equal to partial pressure divided by the total pressure Total pressure= sum of partial pressure use PV=nRT where n= number of moles equation become PV/RT=n make sure to convert the temperature to Kelvin and to use 0.0821 for R. V=volume, P=total pressure The ...
Thursday, May 10, 2007 at 9:25pm by Delli
Math
Calculate the integrals by partial fractions and using the indicated substitution. Show the results you get are the same. dx/1-x^2; substitution x= sin pheta I understand how to do the partial fraction part, but not the second part and I dont know how they are similar. Any ...
Monday, February 25, 2008 at 3:52am by Jessica
College Chemistry
mole fraction O2 = partial pressure O2/total pressure mole fraction He = partial pressure He/total pressure. And you thought chemistry was hard.
Tuesday, March 9, 2010 at 12:41pm by DrBob222
chemistry
When determining partial negatives and partial positives, does the partial postive go with the more electronegative atom? Ex: C=O, the polarity arrow goes toward the O because its more electronegative than the C but which atom gets the partial negative and which has the ...
Wednesday, October 3, 2007 at 9:23am by AMY
Chemsitry II
The partial pressure of CH4(g) is 0.185 atm and that of O2(g) is 0.300 atm in a mixture of the two gases. a) What is the mole fraction of each gas in the mixture? b) If the mixture occupies a volume of 11.5 L at 65 degress C, calculate the total number of moles of gas in the ...
Thursday, May 10, 2007 at 7:13pm by Jayd
Chemistry
To start, you need to know pressures initially. I would solve for mole fraction H2 and mole fraction HCl. That will be mole fraction HCl = moles HCl/total moles mole fraction H2 = moles H2/total moles. Then PHCl = mole fraction HCl x total P. and PH2 = mole fraction H2 x total...
Saturday, October 16, 2010 at 8:51pm by DrBob222
function ( partial fraction)
Well, thinking fg(x) means f(x) * g(x) I get no consistent solution. So, making fg(x) = f(g(x)) we have f(g) = ag^2 + bg + c = a/(3x^2+2)^2 + b/(3x^2+2) + c = [a + b(3x^2+2) + c(3x^2+2)^2] / (3x^2+2)^2 = 9cx^4 + (12c+3b)x^2 + (4c+2b+a) = 18x^4 + 24x^2 + 11 That makes c=2, b=0...
Saturday, December 17, 2011 at 6:52am by Steve
Calc II
Perform long division on the integrand, write the proper fraction as a sum of partial fractions, and evaluate the integral: (integral of) 2y^4dy/y^3 - y^2 + y - 1 After long divison I get: (integral of)2ydy + 2(integral of)dy + (integral of) 2/y^3 - y^2 + y - 1 I keep getting ...
Sunday, December 6, 2009 at 10:08pm by Jenna
College Chemistry
A mixture of He and O2 is placed in a 4.00L flask at 32 degrees Celsius. The partial pressure of the He is 2.7 atm and the partial pressure of the O2 is 1.4 atm. What is the mole fraction of O2?? I don't understand how to do this.
Tuesday, March 9, 2010 at 12:41pm by Fernando
Chem/math question - from Sam
Your answer to a is correct IF the unit is atmospheres. b. Set up at ICE chart. Initial: pressure PCl5 = 1.263 atm partial p PCl3 = 0 partial p Cl2 = 0 change: partial p PCl3 = +y partial p Cl2 = y partial pressure PCl5 = -y equilibrium pressures: add the columns to obtain ...
Thursday, January 15, 2009 at 8:43pm by DrBob222
Chemistry partial molar volumes
The partial molar volumes of the CCl4 and benzene are 122cm3/mol and 98.0 cm3/mol, respectively in a solution in which mole fraction of chloroform is 0.2. Calculate the volume occupied by 2.5 moles of the solution. Thank yOu.
Wednesday, August 24, 2011 at 8:11pm by Urgent pls.
Calculus
Find the equation of the tangent plane at the given point. 1)x^2+y^2-z=1 at the point (1,3,9) 2)x^2*y^2+z-40=0 at x=2, y=3 3) x^2+ln(xy)+z=6 at point (4,0.25,2) For the first one I got the partial fraction in terms of x, y and z and my final answer was -2x+6y-z+2. I don't ...
Thursday, October 4, 2012 at 1:10pm by Alicia
partial fraction
FIND A, B AND C
Friday, December 16, 2011 at 8:40pm by kingwendu
AP CHEM! PLEASE HELP
partial pressure = k*c with c in moles/L. You don't provide a k and I don't know it by memory; however, look up k (k is available in many different units--for this formula you want k in units of atm*L/mol which is the same as atm/M). To obtain partial pressure of the ...
Monday, December 12, 2011 at 11:18pm by DrBob222
Physics Phase Constant
Figure A [[which i tried to recreate below]] is a partial graph of the position function x(t) for a simple harmonic oscillator with an angular frequency of 1.1 rad/s. [a] ............x(cm).............. .................5...
Wednesday, April 4, 2007 at 5:28pm by COFFEE
Binomial
I do not agree with your partial fraction sum.
Wednesday, March 3, 2010 at 10:24am by drwls
chem
partial pressure and mole fraction
Thursday, February 7, 2008 at 12:48am by drbob222
Pre-Calculus(Help)
Partial Fraction of the Rational Expression: x^2+x+8/x^3+x
Sunday, December 4, 2011 at 10:51pm by Joshua
chemistry
Partial pressures are additive. So, total pressure - partial pressure of Hg = partial pressure of nitrogen. Use PV = nRT (using nitrogen's partial pressure) to find volume.
Thursday, March 24, 2011 at 7:36am by Liz
calculus
find the exact length of the curve y = ln(1-x^2), 0 <= x <= (1/2) So by doing the work I eventually get down to integral from 0 to 1/2 (1 + x^2)/(1-x^2) dx but I keep getting -1 + 1/(x-1) - 1/(x+1) after partial fractions which gives the answer ln(1/3) - 1/2 when...
Wednesday, March 13, 2013 at 3:46am by Daniel
Chemistry
The total vapor pressure of the solution is the partial pressure of the H2O + the partial pressure of the EtOH. I calculated the pH2O and obtained 15.45 torr just as you did. Therefore, you must have used the right mole fraction of H2O. I calculated that to be 0.8828 (I know ...
Saturday, February 18, 2012 at 10:24pm by DrBob222
math
how do you integrate 30x^2/((x-2)(x+3)(x-5)) using partial fraction decomposition
Sunday, February 15, 2009 at 4:16pm by Lauren
Mathematics
Anybody know how to do this? I need help ASAP..Express (x^2-x)/((x^2+3)(x^2+2)) in partial fraction. Thanks a lot.
Wednesday, October 1, 2008 at 6:19pm by WarmQiLing
Mathematics
Express (x^2+23)/((x+1)^3(x-2)) in partial fraction. Thanks very much
Wednesday, October 1, 2008 at 6:15pm by WarmQiLing
chemistry
The gases in a mixture have the following partial pressures at the same volume and temperature: 1,013,000 Pa nitrogen, 700 mm argon, 1.20 atm of helium, 790 torr oxygen, and 0.50 atm of carbon dioxide. Rank these gases in order of increasing mole fraction, putting the gas with...
Thursday, April 29, 2010 at 7:31pm by tete
Pre-Calc
How do I solve this via partial fraction decomposition? (x^2+9)/(x^4-2x^2-8)
Friday, April 12, 2013 at 1:20am by Micki
precalc
Write the partial fraction decomposition of the rational expression. 6x^2+1/x^2(x-1)^2
Sunday, December 4, 2011 at 9:54pm by Robert
Mathematics
Express (x^6-x^5-4x^2+x)/(x^4+3x^2+2) in partial fraction. Help anybody? Much appreciated.
Wednesday, October 1, 2008 at 6:29pm by LingWarmQi
Chemistry
You want to convert 8.2 g O2 to moles, 8.2 g N2 to moles, 8.2 g H2 to moles. Then determine the mole fraction of each. partial pressure each = Xof each*1.5 atm. moles fraction, O2 for example, = moles O2/total number of moles.
Monday, August 2, 2010 at 6:24pm by DrBob222
Chemistry
The vapor pressures of ethanol (C2H5OH) and 1-propanol (C3H7OH) are 100 mmHg and 37.6 mmHg, respectively. Assume ideal behavior and calculate the partial pressures of ethanol and 1-propanol at 35 degrees Celsius over a solution of ethanol in 1-propanol, in which the mole ...
Thursday, March 18, 2010 at 12:27am by Arnold
Math
Express in partial fraction.7x^2-18x-7 divided by (x-4)(2x^2-6x+3)
Sunday, April 10, 2011 at 5:05am by Emma
Math
Express in partial fraction.7x^2-18x-7 divided by (x-4)(2x^2-6x+3)
Sunday, April 10, 2011 at 5:05am by Emma
Chemistry
Use mole fraction. mole fraction Ne = moles Ne/total moles. partial pressure Ne = mole fraction Ne x total P.
Thursday, April 22, 2010 at 9:41am by DrBob222
math
write a definition for an equivalent fraction. A. a fraction of multiplication B. fraction with unlike denominators C. a fraction with the value of n D. a fraction thar represents equal amount I put down D.
Sunday, July 29, 2012 at 9:53pm by Ami
PRE CALC
please help me solve this partial-fraction decomposition! 12x-57/(x-3)(x-10)
Sunday, May 15, 2011 at 11:32pm by esora
Precalculus
Ok u have to put X^3-8 divided over X^2(X-1)^3 Into a partial fraction I need help please
Tuesday, February 23, 2010 at 12:25am by Sinya
Math
Write the partial fraction decomposition of the rational expression. (80-14x)/(x^3 -8x^2 +16x)
Thursday, February 16, 2012 at 3:55pm by Chelsea
chem
Dalton's law of partial pressures says that the total pressure equals the sum of the partial pressures of each gas in the container. If the partial pressure of air is 762 and the total is 800, then the partial pressure of ethanol is >>
Monday, April 28, 2008 at 3:51pm by DrBob222
Maths
When the numerator and denominator of a fraction are each increased by 5, the value of the fraction becomes 3/5 When the numerator and denominator of that same fraction are each decreased by 5, the fraction is then 1/5 Find the original fraction. (Hint: Let the fraction be p/q...
Saturday, November 13, 2010 at 4:32pm by Jannie
Chem
A mixture of He Ne and 3rd gas exhibit a total pressure of 486 mm hg if the partial pressure of He125mm mm hg and partial pressure of Ne is 214mm hg what is the mole fraction of the 3rd gas in container
Sunday, April 21, 2013 at 8:08pm by Ray
Chemistry
30.4% SO2 = mole fraction 0.304. Atm total pressure = 676.4/760 = ?? mole fraction SO2 x total P (in atm) = partial pressure SO2. mole fraction SO2 = 0.304.
Sunday, April 4, 2010 at 5:48pm by DrBob222
chemistry
the original partial pressures of He, Ne, and Ar have been cut in half the partial pressure of CO2 is three times that of Ne all four gases have equal partial pressures the partial pressure of Ar has doubled
Friday, April 18, 2008 at 1:08pm by Sam
chemistry
a. the original partial pressures of He, Ne, and Ar have been cut in half b. the partial pressure of CO2 is three times that of Ne c. all four gases have equal partial pressures d. the partial pressure of Ar has doubled
Friday, April 18, 2008 at 1:08pm by Sam
Physics Phase Constant
..im really stuck on this. can someone please explain? ------- Figure A [[which i tried to recreate below]] is a partial graph of the position function x(t) for a simple harmonic oscillator with an angular frequency of 1.1 rad/s. [a].....x(cm)....... ........5...
Wednesday, April 4, 2007 at 4:38am by COFFEE
Chemistry
Keq is a number, evaluated experimentally. The Keq expression is (partial pressure of products)/(partial pressure of reactants) and raise each one to the power indicated by the coefficient. Here is the one as an example. I shall be happy to check your work for the others. Kp...
Sunday, March 9, 2008 at 11:07pm by DrBob222
Trig
How would you write the partial fraction decomposition of the rational expresion 1/(x^2)-25? I know that you factor the denominator, so that's 1/(x-5)(x+5). What are the next steps?
Tuesday, May 10, 2011 at 7:45pm by JD
Calculus
Write the form of the partial fraction decomposition of the rational expression. It is not necessary to solve for the constants: 4x + 1/(x + 6)(x - 5) I came up with A/x + 6 + B/x - 5
Wednesday, November 28, 2007 at 11:20am by Kelly
Chemistry
mol fraction A = partial pressure A/total pressure
Tuesday, March 13, 2012 at 1:32pm by DrBob222
calculus
wait, are you doing the convergent problem or the partial fraction problem?
Sunday, March 16, 2008 at 6:48pm by mika
chemistry
That's partial pressure O2 = mole fraction O2 * 565 mm.
Sunday, November 8, 2009 at 5:19pm by DrBob222
A.P Chemistry
5 b) (chi)x1= n1/ n total = N1/ n1 + n2 x1 = .875/.875+.875=.5 the molar fraction PARTIAL PRESSURE is (x)n2*P total= partial pressure of N2 \ .5 *8.56atm = 4.28atm
Sunday, October 22, 2006 at 11:53pm by Eric Fish
partial fraction
if f(x) ax^2+bx+c , g(x) :1/3x^2+2 and fg(x)= 18x^4+24x^2+11/(3x^2+2)^"
Friday, December 16, 2011 at 8:40pm by kingwendu
Precalculus
First, check the degree of the numerator and the denominator. If the degree of the numerator is higher than that of the denominator, do a long division to reduce the expression to a proper fraction. Degree of numerator = 3 Degree of denominator = 2+3 = 5 No long division is ...
Tuesday, February 23, 2010 at 12:25am by MathMate
algebra
Could somebody tell me in simple terms why equating coefficients works in partial fraction decomposition? Like a simplified proof or something? I don't understand why.
Monday, June 6, 2011 at 7:04pm by Jack
Math
Find the partial fraction decomposition for the ration expression. (4x^2 + 9x - 8) / x(x+2)^2 So far, I believe the format is (A/x) + [(Bx+c)/(x+2)^2] ...and I get confused after that. Help plz! Thank you!
Monday, December 29, 2008 at 1:00pm by Naoko
Mathematics
Express (3x^3+2x^2+2x-3)/((x^2+2)(x+1)^2) in partial fraction. Help any1 plz ASAP. Thanks a million
Wednesday, October 1, 2008 at 6:22pm by QiWarmLing
Math
The denominator of a fraction exceeds twice the numerator of the fraction by 10. The value of the fraction is 5/12. Find the fraction.
Friday, January 18, 2013 at 10:07am by MP
algebra
obviously the first fraction is a proper fraction, i.e, it is less than 1 and the second fraction is an improper fraction, thus it is greater than 1 , so how can it be smaller ??
Wednesday, May 30, 2012 at 1:49pm by Reiny
Algebra 1Part 2
Where did you get it written like that? On paper is it fraction over fraction over fraction over fraction? If so, when you enter it here, you need ( ) for each separate part of the fraction otherwise it could be interpreted as 3n^2 subtract n divided by n^2 etc.
Tuesday, March 5, 2013 at 1:21pm by Dr. Jane
Chemistry
Heat Capacity at constant volume: CV = (partial q / partial T) with V constant since volume is constant, work is zero and dq = dU, so CV = (partial U / partial T) with V constant Delta U = CV * Delta T Does this final relationship hold during a reaction where volume is NOT ...
Wednesday, March 4, 2009 at 10:25pm by jake
chemestry
Dalton's Law of Partial Pressure says that the total pressure equals the sum of the partial pressures of each gas (that is, each gas exerts a partial pressure independent of the other gases). Ptotal = PgasA + PgasB.
Saturday, June 12, 2010 at 4:02pm by DrBob222
precalc/trig
Write the partial fraction decomposition of the rational expression. 4x^2–19x+31/ (x+2)(x^2–4x+5)
Saturday, December 3, 2011 at 11:19am by Robert
Algebra
thank you but I still do not get 33. the question is x minus the fraction 2/3 = the fraction 4/5. to get the answer i would add the fraction 2/3 to the fraction 4/5 which gets me x = 22/15, right?
Sunday, September 21, 2008 at 11:00am by Carmen
pre-calculus
partial fraction; use the rational roots theorem to factor denominator. x^3 + 2 ----------- x^4 +8x^2 +16 i got to that and im stuck Ax+B + Cx+D ---- ----- x^2 +4 x^2 + 4
Wednesday, March 27, 2013 at 8:16pm by jinie
algebra
write the partial fraction decomposition of the rational expression ax over x squared -x-2 or ax ____________ xsquared-x-2
Monday, November 1, 2010 at 9:13am by frank
Math
I need help with this partial fraction problem. Find the indefinite integral of (-5x^3+5x^2-5)/(x^4+X^3). I got -5(log(x+1)+(1/x)-(1/(2x^2)).
Sunday, February 15, 2009 at 8:46pm by Sandra
pre calc
The Identity Function The Squaring Function The Cubing Function The Reciprocal Function The Square Root Function The Exponential Functional Lo The Natural Logarithum Function The Sine Function The Cosine Function The Absolute Value Function The Greatest Integer Function The ...
Friday, December 18, 2009 at 11:09am by kim
Calculus ll
Find the partial derivative of the function with respect to each of the independent variables.f(x,y)=xe^2y
Tuesday, June 7, 2011 at 9:21pm by Chris
math
Will someone please show me how to do this problem. I have to write this ratios in simplest form. The ratio of 5 3/5 to 2 1/10. Change each of your mixed fractions to an improper fraction, then divide the first by the second. Remember to divide fraction #1 by fraction #2, you ...
Sunday, February 4, 2007 at 1:34am by jeff
algebra please help
If the fraction of "skylight" is x and the fraction of the "macintosh" is 1-x, the fraction of red pigment contained in the mixture will be 0.125 x + 0.20 (1-x) = 0.17 Solve for x. 0.03 = 0.075x x = 0.4 = skylight fraction (1-x) = 0.60 = macintosh fraction
Wednesday, March 18, 2009 at 11:31pm by drwls
Math(Please help)
Evaluate: f(x,y)=2x^3e^y a) partial derivative with respect to x. I know that you have to treat y as a constant but I have no idea what to do. I do not understand partial derivatives at all. Please help!! b) partial derivative with repsect to y.
Friday, April 29, 2011 at 5:57pm by Hannah
chemistry
Use PV = nRT and calculate pressure for methane. Convert 8.00 (WHAT) to moles. Do the same for 18.0 WHAT ethane. Then partial pressure CH4 + partial pressure ethane + partial pressure unknown = 3 atm.
Saturday, November 20, 2010 at 7:52pm by DrBob222
chemistry
Dalton's Law of partial pressures says that each gas of a mixture exerts its partial pressure independent of the others; i.e., the sum of the partial pressures is the total pressure of the system. Therefore, total P = PN2 + PCO2 + PO2
Wednesday, June 23, 2010 at 10:09pm by DrBob222
Algebra
Below is my problem with my answers. I don't think this is that tough, but I cannot believe that my ABC answer's are a fraction. Did I do this correctly? Find the unknowns on the right side of the partial fraction. (x+3)/(x^3+64)=(A)/(x+4)+(Bx+C)/(x^2-4x+16) x=0 A= (-x...
Friday, April 18, 2008 at 5:48pm by Tim
Physics 3
The x force is -dU/dx (partial derivative) The y force is -dU/dy (partial derivative) You should place a ^ before exponents, as in U = 3x^3* y -7x I assume you know how to take partial derivatives. Treat the other variables as constants.
Thursday, October 20, 2011 at 9:03pm by drwls
Chemistry
I don't have Table 5.2 but I assume that is vapor pressure of water. Total pressure (752 torr) = Partial pressure H2 + partial pressure of H2O. Look in the table at 16 C and pick up the vapor pressure of water (partial pressure of water), subtract that from 752 to find the...
Monday, October 18, 2010 at 5:18pm by DrBob222
CHEMISTRY
Kp = 4 = partial pressure of A x partial pressure of B 4=p*p 4 = p^2 p=2 atm partial pressure A = 2 atm at eqilibrium. partial pressure of B = 2 atm at equilibrium. Kp = Kc(RT)delta n You know Kp and you know R and T. You can calculate delta n (it's mols reactants - moles ...
Sunday, March 18, 2012 at 5:05pm by DrBob222
Chemistry
Luc, I apologize for sending you astray. Here is the way you do it. I tried a shortcut that isn't legal. :-0 You want to find the mole fraction of SO2, then XSO2 * (676.4/760) = partial pressure SO2. Take a 100 gram sample. That will give you 30.4 g SO2. 28.4 g PF3. 100...
Sunday, April 4, 2010 at 5:48pm by DrBob222
calculus
I would prefer to write the V equation as V(h) = (pi/3)(R^2*h-h^3) to emphasize that the (R^2h-h^3) term is not in the denominator. Unless R is a function of h, you do not have to use the chain rule. You have said nothing that implies that R is a function of h. R and h are ...
Wednesday, April 22, 2009 at 10:28am by drwls
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