Saturday
December 3, 2016

Number of results: 108,625

I'm pretty sure that OH- has a bond order of 1. OH+ has a bond oder of 1. confirm this please.
May 25, 2008 by Tom

Chemistry
Does SF5 exhibit hypervalency? I believe yes as it has an extended octet...please confirm this for me, thanks for your help!
September 28, 2011 by Cassie

Chemistry
At a certain temperature, the Kp for the decomposition of H2S is 0.832 H2S (g) <-- --> H2 (g) + S (g) Initially, only H2S is present at a pressue of 0.121 atm in a closed container. what is the total pressure in the container at equilibrium? Please tell me how to do it ...
March 9, 2012 by Kylie

Chemistry
At a certain temperature, the Kp for the decomposition of H2S is 0.832 H2S (g) <-- --> H2 (g) + S (g) Initially, only H2S is present at a pressue of 0.121 atm in a closed container. what is the total pressure in the container at equilibrium? Please tell me how to do it ...
March 9, 2012 by Jerry

Chemistry
Find the pH of 1.0E-8 M H2S04 (H2SO4 <==> 2H^+ + SO4^2-) I have got answer to be 7.70, can you confirm the answer for me please? If it is not good, i'll be very grateful if you could leave some guides.
September 6, 2014 by Matt

determine the mass of CO that is produced when 45.6g of CH4 react with 73.2g of O2. 2CH4 + 3O2 ---->2CO + 4H2O nCH4 = 45.6 g/16.05 g/mol =2.84 mol nCO=2.84 mol mCO=n*M =2.84*28.01 =79.5 grams
May 25, 2008 by Nicole

calculus derivatives
Please confirm: {(5x+2)^4/x^2-3x+1)^3}= 20(5x+2)^2(x^2-3x+1)^3 -3x^2(5x+2)^4 (x^2-3x+1)^2/(x^2-3x+1)^6
July 19, 2012 by Laurie

Computer science
Hi, Can someone please confirm the following for me .. This realtes to PSK or phase shift keying. Is it right that 8PSK uses eight different phase shifts each representing one of the eight patterns of three bits ... ?? Does it ehn follow that 256PSK uses 256 different phase ...
April 3, 2011 by Oddie

Chemistry
How do we use 2 indicators to confirm the pH of a solution?
November 4, 2014 by John

Physics/Boyles Law
Please confirm/tidy up my fragile understanding as follows: Boyles Law is apparently now known by another name???? If I compressed the air in a room into a cylinder obviously everything that was in the room is now in the cylinder including the heat. As the heat out of a large ...
October 12, 2007 by Mike

Using MO theory (but w.o drawing a MO diagram) predict whether HHe or HHe+ would be more stable. I believe HHe+ would be more stable as the bond order would be 1 (i.e. BO=(2-0)/2) while BO for HHe is 1/2. Please confirm! thanks!
September 28, 2011 by Cassie

Differentiation
Could someone confirm that the derivative of: ln(2x) is: 1/2x No answers please, just yes or no. Thanks if u= 2x d/dx ln u= 1/u du No. if u= 2x d/dx ln u= 1/u du No. Got it, thanks.
June 30, 2007 by CharlieGolf

Pre-Calculus
How do you confirm that f and g are inverses by showing that f(g(x))=x and g(f(x))=x ? Problem: f(x)=3x-2 and g(x)= x+2 --- 3 Please help, don't know where to begin?
September 16, 2008 by House

algebra
What is 4,756 divided by 32? I got 148.625 please confirm?
March 17, 2011 by Jeannie

Chemistry
At 389K, this reaction has a Kc value of 0.0682. 2X(g) + 2Y(g) <-> Z(g) .. Calculate Kp at 389K. Kp= this is what I did.. can somebody confirm or find any mistakes in my thought process? Kp = Kc(R)(T)^Delta n Delta n = (1)-(2+2) = -3 Kp = (0.0682)(0.08206)(398K)^-3 = 0....
March 5, 2012 by Tracy

Chemistry
Dr Bob Can you please confirm for me that only NH3 has a boiling point that does not fit the general trend from these choices NH3 PH3 SbH3 AsH3 many thanks andy I am picking NH3 because of the reason that the larger the compound the greater the boiling point Am I right with my...
May 11, 2010 by Andy

Chemistry
Are there any chemical reactions or observations that involve sodium hydroxide or any other bases, but cannot be used to confirm its basic nature?
November 16, 2014 by John

Chemistry
What is the pH of a solution prepared by dissolving 1.23g of 2-nitrophenol (FM 139.11) in 0.250 L? Well so, i calculated the no.moles of 2-nitrophenol, and divided it by 0.250, to get the molarity which was 3.53E-2. Since the molar ratio of dissociation is 1:1, i assumed [H+] ...
August 31, 2014 by John

Find the image of O (-2,-1) after two reflections, first across the line y=-5, and then across the line x=1. I believe the answer should be (-1,-6) Can someone please confirm?
November 2, 2016 by Sami

Algrebra
How do you insert grouping symbols to make this equation true? 14 divided by (5+2) +8=10 14/7=2+8=10 Please confirm, I really have an issue with Algebra
March 20, 2011 by Jeannie

Chemistry
How do I know which of these .1M solutions will have a pH less than 7? KF, NH4I, NaH2PO4, Fe(NO3)3 I am guessing all but KF is acidic...but if someone could confirm this and explain why that would be helpful
February 24, 2010 by Mark

Chemistry
which of the following compounds dissolve in water?? -Sodium Nitrate (NaNO3) - Sucrose (C12H22O11) - Sodium Chloride (NaCl) - Potassium Sulfate (K2SO4) - Ethanol (C2H5OH) - Sodium Bicarbonate (Baking Soda)(NaHCO3) - Calcium Sulfate (CaSO4) i did an experiment, but I was not ...
September 25, 2009 by Liz

chemistry
can someone confirm that the functional group of cocaine is the ch3n group. thanks
January 11, 2009 by Valerie

chemistry
A reaction has ÄH = -378 kJ and ÄS = -37 J/K. Calculate ÄG at 25°C to confirm that the reaction is spontaneous. in kJ

Chemistry
Using MO theory (but w.o drawing a MO diagram) predict whether HHe or HHe+ would be more stable. I believe HHe+ would be more stable as the bond order would be 1 (i.e. BO=(2-0)/2) while BO for HHe is 1/2. Please confirm! thanks!
September 28, 2011 by Cassie

chemistry
Phosphorus pentachloride decomposes according to the chemical equation PCl5(g) -----> PCl3 (g)+ Cl2(g) Kc= 1.80 at 250 degrees C A 0.463 mol sample of PCl5(g) is injected into an empty 4.80 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and PCl3(...
March 9, 2012 by Sarah

Stats
Think I know the answer, but can someone please confirm... Find the value of a that corresponds to a confidence level of 84%. Answer: 0.16???
September 13, 2008 by Cassy

algebra
is there even a solution to this problem: x^2 − 10x + 20 = 0 I think this answer is no solution , please confirm I am right...
October 21, 2013 by Anonymous

Chemistry
Can someone confirm that I'd be doing this right? If an 0.520 m aqueous solution freezes at -3.00 C, what is the van't Hoff factor, i, of the solute? It says I can find the Kf values on a table. I had no idea which Kf value to use... so i just used water... is that right? If ...
February 16, 2012 by David

Algebra
Write 27/4 as a mixed number, I keep getting 6.75 but it does not seem correct, please confirm if it correct or if I am missing something.
March 19, 2011 by Jeannie

math
October 22, 2013 by Anonymous

Maths-Vectors Help!
Please help confirm if I got this problem correctly; 1)2jx(3i-4k) sol>> 2x3jxi - 2x4jxk = 6jxi - 8jxk = 6k - 8i 2) (i-2j)xk Solutn>> ixk - 2jxk = -j - 2i 3) (2i-4k)x(ix2j) solutn>>2ixi Please do help with this ONE yes, correct. On the third, break recheck if ...
April 16, 2007 by Segun

CHEMISTRY HELLPPPP
WHich of the following elements are semiconductors? Ge, Si, Te, Po, S, Al, Se, Ca i believe only Ge, Si, Te, and Se are semiconductors, can someone confirm this? did i miss or over look something
April 22, 2007 by Anonymous

algebra
Which of the following are examples of inferential statistics? Check all that apply. A.Finding the average (mean) of a set of numbers B.Testing every lightbulb produced by a company to confirm that each one works C.Testing random samples of lightbulbs produced by a company to ...
April 17, 2012 by daryl

Chemistry
What is the net ionic equation of reaction of MgCl2 with NaOH? I got the equation and then balanced it and then omitted the spectator ions and ended up with: Mg(OH)2(aq)--->Mg(OH) (s) I wanted to confirm to see if that was correct, thanks.
September 26, 2012 by M

chemistry hw
SOMEONE PLEASE HELP AND CONFIRM THE RIGHT ANSWER FOR ME...I HAVE ONE MORE ATTEMPT TO THIS PROBLEM AND I NEED HELP!!!!! PLEASE!!!!!!!!!!!!!!!!!!!! THANKS! In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied ...
February 19, 2012 by Ariel

Algebra
Please confirm if I did the follow problems correctly: A) Find the sum or difference. (5a – 3b) + (2a + 6b)= 7a + 9b Answer: = 7a + 9b B) Let’s work a few of these (FOIL) 1) (x+2) (x+8) = x 10 Answer: x10 2.) (x+5) (x-7) = x + 11 Answer: x + 11 3.) (2x+4) (2x-3) = 4x + 7 ...
April 3, 2011 by Jeannie

Algrebra
Please confirm if I did the follow problems correctly: A) Find the sum or difference. (5a – 3b) + (2a + 6b)= 7a + 9b Answer: = 7a + 9b B) Let’s work a few of these (FOIL) 1) (x+2) (x+8) = x 10 Answer: x10 2.) (x+5) (x-7) = x + 11 Answer: x + 11 3.) (2x+4) (2x-3) = 4x + 7 ...
April 3, 2011 by Jeannie

Math
(8.86 + 1.0 * 10^-3) / (3.610 * 10^-3) Calculate the above formula, expressing the answer in scientific notation with the correct number of significant figures: 8.86 + 1.0 * 10^-3 = 8.86 + 0.0010 = 8.8610 = 8.86. 8.86/(3.610 * 10^-3) = 2454 2.454 * 10^3 Please confirm if I did...
January 9, 2015 by John

Please confirm if I did this correctly: What is the Principal? Principal \$21250 X 10% 2,125 What is the total amount paid by the consumer? 2,125 x 3.5 years 7,437.5 +21,250.0 28,687.50
June 4, 2011 by JC

I am curious to know what "sight reduction tables" are: I assume they give distance and bearing (azimuth) from one known (or assumed)location on the surface of the earth to another to the accuracy of the tables. Please can someone confirm or correct my assumption. Thanks Mike
January 11, 2008 by Mike

Chemistry
The value of delta H for the reaction below is -1107kj. 2Ba (s) + O2 (g) -> 2BaO (s) How many kJ of heat are released when 5.75 g of BaO (s) is produced? Here is how I approached this problem: 1. Converted 5.75 g of BaO to mol: 5.75g x (1mol BaO/153.3g BaO) = 0.0375 mol BaO...
May 23, 2011 by Thao

Given v = 4t - 9t3, find the acceleration when t = 1 s. acceleration in m/s2 = My Answer V'=4-27t2 V"= -54t V"(1)= -54 acceleration in m/s2 = positive 54 Can you please confirm this is correct???? Thanks
January 29, 2013 by Brownie

Given v = 2t3 + 87t2 - 636, determine the acceleration for t= 1 s. acceleration in m/s2 = My Answer v'= 6t^2+174t V"= 12t V"(1) = 12 acceleration in m/s2 = 12 Can you please confirm this is correct.. Thanks!
January 29, 2013 by Brownie

Given s = 4t + 11t3, find the velocity when t = 1 s. velocity in m/s = My Answer: S'=4+33t^2 =4+33 =4+33 =37 velocity in m/s = 37 Can you please confirm this is correct. Thank you
January 29, 2013 by Brownie

Math for Educators
24five x 3five ------ 132five 27eight 65eight +43eight ------- 157eight 75eight -37eight ------- 36eight 1213five/3five??? -If someone could please confirm my answers for the others as well as help me with the last division problem thank you! these are all equating in ...
June 17, 2013 by Kelly

chemistry
This is an assesment question and im really bad at these, i did the first two questions and now i am stuck. They ask you to design a series of experiments that can be used to confirm the structure and organization of the table of relative strengths of acids and bases. the want...
November 24, 2012 by Tara

Maths
Hey! I have this problem - i'm currently working on Quadratics at school, and i got homework. One of the questions is 18^2+2px+32. I have to find the Value of P, the answer i got is P>+-24. Can someone please confirm this is correct?
September 24, 2016 by Simon

Math
A particle is projected along an inclined plane with a velocity given by the formula v = 4.4t2 + 10.1t -23.2. Determine the acceleration of the particle when t = 1.5 s. acceleration in m/s2 = My Answer V'=8.8t+10.1 V"=8.8 V"(1.5)= 8.8 acceleration in m/s2 = 8.8 Can you please ...
January 29, 2013 by Brownie

Mathematics
Hi, Can someone check this for me .. please A tuning fork has a wavelength 0f 136 centimetres. Given that the speed of sound is 340 metres per second what is the frequency of the tuning fork ?? Frequency = speed / wavelength Then 340 / 1.36m (136cm) = 250 Hz Thank you try to ...
May 28, 2011 by Alan

accounting
The auditors may decide to confirm accounts payable on an audit engagement. Describe two reasons why the confirmation of accounts payable is not a genreally accepted auditing procedure, describe the audit crcumstances in which the auditors are likely to decide to confirm ...
June 7, 2009 by kew

Math
For a track and field athlete who can jump vertically, his distance above the ground is given by the formula s = 3.3t - 4.9t2. What is his initial velocity? velocity in m/s = My Answer S'= 3.3-9.8t S'(0) = 3.3 velocity in m/s = 3.3 Can you please confirm this answer Thanks
January 29, 2013 by Brownie

Can someone check gammar, punctuatiion and structure please. Draft an email of at least four complete sentences to Deb Walker the designated trainer: Confirm the arrangements for the seminar providing only the information she needs to arrive at the right place at the right ...
April 4, 2012 by danny

chemistry
When combined with cupric ions (aq, 1M) which will produce the largest standard cell voltage? (Use data from table 20.1, and Appendix D page A28-A29 in Petrucci) 1. ) Mn(s) 2. ) MnCl2(aq) 3. ) KMnO4(aq) 4. ) MnO2(s) the answer i got was MnCl2,,,,but im not sure if its right...
December 1, 2009 by mandeep

Science
What Temperature would you get after the First 5 Minutes of Putting 4 Ices into a 99 degree warm water? After The Second 5 MInutes? YOu Might need to do this experiment at home. But May anyone Please Help and tell me it in Farenheit so i can confirm my Answers.
December 13, 2011 by Science

science
which of the following has both dispersion forces and dipole-dipole forces? Br2 HCl H2 CO2 BCl3 I reckon its HCl can anyone confirm please
May 11, 2010 by Anonymous

GEOMETRY
What is the area of a triangle? 7 ft by 3 ft with 55 degrees angle Please confirm my answer or tell me what I did wrong... • 6.0 ft² • 8.6 ft² • 15.0 ft² • 17.2 ft² my answer
March 24, 2015 by Anonymous

chemistry
When combined with cupric ions (aq, 1M) which will produce the largest standard cell voltage? (Use data from table 20.1, and Appendix D page A28-A29 in Petrucci) 1. ) Mn(s) 2. ) MnCl2(aq) 3. ) KMnO4(aq) 4. ) MnO2(s) the answer i got was MnO2,,,,but im not sure if its right......
December 2, 2009 by mandeep

Statistics
Dear Lee, Please confirm these answers to this question. your medical terminology instructor listed the following grades for the class out of a 75 point test: 33,34,43,45,45,54,55,59,60,62,64,66,67,68,67,68,68,69,70,70 a.find the 90th percentile b. your score was 59, what is ...
November 3, 2013 by Ben

calculus II
I have the function f(x)=e^x*sinNx on the interval [0,1] where N is a positive integer. What does it mean describe the graph of the function when N={whatever integer}? And what happens to the graph and to the value of the integral as N approaches infinity? Does the graph ...
February 24, 2010 by Paul

chemistry
Given the thermochemical equation SO2(g) + ½ O2(g) ---> SO3 (g) DH = -99.1 kJ calculate the enthalpy change (DH) when 89.6 g of SO2 is converted to SO3. 1. 69.3 kJ 2. -111 kJ 3. -139 kJ 4. 139 kJ 5. -69.3 kJ i got -139 kj but im so unsure may some one confirm it for me?
November 24, 2009 by paneet

Given s = 10 - 10t2 + 45t3, determine the velocity when t = 1 s. velocity in m/s = My Answer S'= 0-20t + 135t^2 S'(1) = -20+135 = 115 velocity in m/s = 115 Can you please confirm this is correct. Thanks!
January 29, 2013 by Brownie

Calculus
int(dx/(x^2+9)) u = x/3 Use the indicated substitution (above) to evaluate the integral. Confirm answer by differentiation. Okay, so I found that du/dx is 1/3. dx is 3du. Just by looking at the integral I can tell this is some form of tan^-1(x), if we change it to int(1/(x^2+9...
October 23, 2010 by Nikki

Math
An atomic particle moves in a linear motion according to the formula s = 19 - 14t2 + 4t3. Determine the particle's velocity at the end of 2.9 seconds. velocity in m/s = My Answer S'= 0-28t+12t^2 S'(2.9) = 0-28(2.9)+12( 2.9)^2 = 0-81.2+100.92 =19.72 Can you please confirm this ...
January 29, 2013 by Brownie

chemistry
For the following: i) H3PO4 > H3AsO4 > H3SbO4 ii) H2Te > H2Se > H2S > H2O iii) HCl > HBr > HI iv) SbH3 > AsH3 > PH3 > NH3 The order of acidity is correct for which series? 1. ) all are correct 2. ) i and ii 3. )i, ii and iv 4. ) ii, iii 5. ii, iv...
November 24, 2009 by bob

English
Which of the following is an example of a run-on sentence? Baseball is an amazing sport to play and to watch. Nothing beats the thrill of the sport on the diamond. I hope you like watching baseball, I really love it. If you don’t watch it, you don’t know what you’re ...
October 13, 2015 by Guy

Math
@ reiny. . . 9x^4-24x^3+16x^2. .i have done it bt i want you to do it 4 me to confirm
January 27, 2016 by Afeez

American Government
Miranda v. Arizona (1966) A. Example of voting rights B. Example of racial - discrimination C. Example of criminal defendant case D. Example of a states rights case I think the answer is D. Please confirm
December 4, 2013 by Sharon

Only a chemist can be trusted with the combination to the safe containing a ton of money. The combination is the pH of solution A, followed by the pH of solution C. (for example: is the pH of solution A is 3.47 and the pH of solution C is 8.15 the combination to the safe is 3-...
May 25, 2008 by Tom

Summarize two observations that are contrary to the predictions based on Newton’s laws but that confirm Einstein’s explanation of gravity. Indicate how the predictions based on Newton’s theory differ from Einstein’s.
January 15, 2014 by Anon

regitration
I did register but still cant post a question can you help how I confirm my registration
April 10, 2009 by john

Biology
Among protostomes, which morphological trait has shown the most variation? A. Type of symmetry (bilateral vs. radial vs. none) B. Type of body cavity (coelom vs. Pseudocoelom vs. acoelom) C. Number of embryonic tissue types (diploblastic vs. triploblastic) D. Cephalization (...
May 18, 2011 by axb

Physics
A cricket ball rotates at 1800 rev/min as it travels through the space in a straight line at 160 km/hr. How many times does it revolve after traveling 20m? Can someone confirm with me if 13.5 revolutions in 20m is right. That's the answer i got too. If it's wrong can someone ...
August 7, 2015 by Yoyo

Draft an email of at least four complete sentences to Deb Walker the designated trainer: Confirm the arrangements for the seminar providing only the information she needs to arrive at the right place at the right time. Copy both to Mr, Dittmer and Ms. Hopkins Create an ...
April 4, 2012 by danny

Chemistry
Calculate the value of Z and its absolute standard deviation. All standard deviations shown are absolute. Show your work and report the standard deviation in the result with two significant digits (to confirm the correct result). Z = (1.18+/-0.07)x((2.21+/-0.05)^3)

pharmacy
suggest a technique , other than tlc, to confirm the purity of the samples
April 19, 2012 by pavan

english
I confirm revised assigned rooms as of today, Friday, May 17, 2013.
May 17, 2013 by Marlena

chemistry
A sample of nickel is heated to 95.0°C and placed in a coffee-cup calorimeter. If the 50.0 g of water in the calorimeter is initially 22.3°C and warms to 25.4°C, what mass of nickel was heated? (The specific heat of nickel is 0.444 J/°C g and water is 4.18 J/°C g). A. 15....
December 10, 2014 by Morgan

Chemistry
Gold has a density of 19.3 g/cm3. The thickness of a piece of gold leaf weighing 1.93 mg and covering an area of 14.5 cm2 is? I solved for volume=10000cm3 then I solved for height and got 690cm is the thickness of gold leaf. Can anyone confirm or deny?
March 23, 2016 by Nikela (Plz Check my answer)

Calculas
Hi, can someone confirm if i got the right answer to this question. SO the region between curves y=x^2+1, y=2x^2-2 and the two axes, Is rotated around the Y-AXIS to form a solid glass vase. Determine the volume of the vase. I got 4*pi. Need confirmation if this is correct, if ...
May 19, 2015 by Galagan

Plz help Physics-bobpursley
Bob, please confirm if I got this right and if not, please help to solve 1)A wire has a resistance of 10 ohm at 20 deg celsius and 13.1 ohm at 100 deg celsius. Obtain a value for its temperature coefficient of resistance. ans I got is this= using Rt = Ro (1 + alpha(T-To)) 13.1...
April 17, 2007 by Charles

Grandpa need Math help
Gettin to old to help a 13 yr old. I think I know the answer to the below but need to confirm it. Anyone that could assist this ol man would be much appreciated!!! How do the volume of prisms compare as the number of faces in the prisms increases? Does the volume remain the ...
April 7, 2013 by Grandpa

Physics
Just reposting. A cricket ball rotates at 1800 rev/min as it travels through the space in a straight line at 160 km/hr. How many times does it revolve after traveling 20m? Can someone confirm with me if 13.5 revolutions in 20m is right. That's the answer i got to. If it's ...
August 8, 2015 by Yoyo

Physics
A spaceship is on a straight-line path between the Earth and the Moon. At what distance from Earth is the net gravitational pull on the probe from the Earth and the moon zero? Mass of Earth = 6×10^24 kg. Mass of Moon = 7×10^22 kg. Can someone please confirm if my answer of ...
August 9, 2015 by Yoyo

Algebra
Do the matrixes of -1 4 3 5 2 0 -6 1 multiplyed by 2 0 1 4 3 -2 -5 1 equal -3/4? Thanks, I just want to confirm that my answer is right (or wrong)
January 5, 2009 by Saria

trig
how can you confirm the identity cos^4x = (1/8)(3+ 4cos2x+ cos4x) and sin4x = (4sinxcosx)(2cos^2x-1)
July 18, 2009 by Sarah Kim

physical science
If you know that a 1-kg object weighs 10N, confirm that the acceleration of a 1-kg stone in free fall is 10 m/s2.
February 9, 2014 by sky

pre cal
Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x. f(x) = x2 - 3 and g(x) = square root of quantity three plus x
June 24, 2014 by jorgeee

Pre-Cal
Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x. f(x) = (x-7)/(x+3) and g(x) = (-3x-7)/(x-1) I got to the point where f(g(x)) is plugged in but how would I simplify it? (((-3x-7)/(x-1))-7)/(((-3x-7)/(x-1)+3)
March 7, 2015 by Michaela

Chemistry - v/v versus w/w
Thanks a lot:) So just to confirm: normally for any chemical bought from manufacturer, if it is not stated, the % usually means v/v? Seems like for conc sulphuric acid, when it is stated 97% sulphuric acid, it means 97% w/w sulphuric acid? Thank you very much. Posted by annie ...
September 20, 2010 by annie

Chemistry
I did a lab in which I added ionic solutions to tap and distilled water and another ionic solution. Distilled water is the control because it does not react to any solutions since it doesn't contain ions. But one of the lab questions I need to answer is: These tests cannot ...
November 16, 2008 by Fred

Calculus
Find the limit. lim 5-x/(x^2-25) x-->5 Here is the work I have so far: lim 5-x/(x^2-25) = lim 5-x/(x-5)(x+5) x-->5 x-->5 lim (1/x+5) = lim 1/10 x-->5 x-->5 I just wanted to double check with someone and see if the answer is supposed to be positive or negative. ...
January 22, 2014 by S

Trigonometry
Show algebraically how to confirm that cos2x=cos^2x-sin^2x using the sum and difference identities
July 15, 2012 by Nikki

Chemistry
A hospital saline solution is analyzed to confirm its concentration. A 60.0 mL sample with a mass of 50.443 g is evaporated to dryness. (a) If the solid sodium chloride residue has a mass of 0.413 g, find the mass/mass percent concentration of the NaCl solution. % (b) Find the...
March 26, 2014 by Harry

CHEMISTRY
Dr Bob Can you confirm please Given a cylinder of fixed volume filled with one mole of Ar gas,which of the following is CORRECT? (assume that all gases obey the ideal gas laws) A: if the cylinder temp. is changed from 20 to 25 deg.C the pressure will double B:a cylinder of ...
May 10, 2010 by Andy

Science
Could you please help me. When water is electrolyzed, two gases ar produced. As indicated in the chemical equation, twice the volume of one gas is produced compared to the other. a) Which gas is produced in larger quantities? Explain * I think it's hydrogen, but i am not sure ...
April 10, 2008 by Samantha

math
Ajax is 8 km due west of Oshawa. Uxbridge is 16 km NW of Oshawa. How far is it from Ajax to Uxbridge? Explain whether you have enough information to solve this problem. my answer was 13.856 km but not confident how I found the angle oshawa to begin with. I used Cos Oshawa = a/...
August 21, 2011 by Dee

Math
A car is projected directly up an incline and its location from its start point is given by the formula s = 9t - 5t2. Determine its initial velocity and initial acceleration. initial velocity in m/s = initial acceleration in m/s2 = My Answer s'=9-10t initial velocity in m/s = ...
January 29, 2013 by Brownie

Algebra
How can I transform the equation 4=x-y into one that begins with "y="? Would I subtract x from both sides to get -x+4=-y? This doesn't look right at all. Or would I add y to both sides and then subtract 4 to get y=x-4? This way seems more correct to me. Please confirm which ...
May 4, 2008 by Anonymous

even though carbon dioxide puts out a burning splint it does not confirm the presence of the gas why?
March 20, 2009 by shan

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