Friday
July 25, 2014

Posts by Rob


Total # Posts: 335

Calc Help
Differentitate y= x^2(sqroot4x-3). Do not simplify. Reads: x squared times the square root of (4x minus 3)

Organic Chemistry
What is the product formed from a reaction of butanal and sodium hydroxide? cyclopentanone and sodium hydroxide? acetophenone and sodium hydroxide? Thanks. You want to look up information about the Aldol condensation.

organic chemistry
which alcohol and carboxylic acid would produce benzyl isobutyrate by Fischer esterification? and which alcohol and carboxylic acid would produce isobutyl benzoate by fischer esterification? I can't find anything about Fischer esterification specifically. But acids + alcoh...

fischer esterification
which alcohol and carboxylic acid would produce benzyl isobutyrate by Fischer esterification? and which alcohol and carboxylic acid would produce isobutyl benzoate by fischer esterification? Since this is not my area of expertise, I searched Google under the key words "Fi...

Chemistry Help!!!
How will the osmotic preassure of an aqueous solution change as evaporation occurs? A.The osmotic preassure will increase. B.The osmotic preassure will not change. C.The osmotic preassure will decrease. D.The osmotic preassure will increase or decrease until it equals the vapo...

Phenol/Nitirc Acid Reaction
Is it possible to illustrate the reaction mechanism for phenol with nitric acid? no well thank you, you have been most helpful

chemistry-lab
2.What does it mean to “follow the course of a reaction”? I would imagine it means to find the overall order of the reaction and make it in to a rate law equation. That's part of it. It can mean, in addition, to knowing any intermediates formed and how they react...

MATH/LOGIC
You have gotten reservations from Fly By Night Tours to an island off the coast of Florida. You arrive and find out that the island is occupied and administered by alligators and crocodiles. You are confronted by a committe of three of these reptiles with the following manifes...

chemistry
Consider the equilibrium, A + B <--> C, with K=32.217 and initial concentrations of A,B, and C, of 3.665M, 0.883M, and 3.925M, respectively. What is the equilibrium concentration of B 3.665 0.883 3.925 A + B = C Keq=(C)/(A)*(B)= 32.217 Q = (3.025)/(3.665)*(0.883)=1.21 Q ...

chemistry
If, for a second-order reaction, the elapsed time after the first half-life is 338.871 seconds, the elapsed time after four half-lives would be (in minutes)... t1/2= 1/k(A). k= 1/t1/2*(A)=1/338.871 s(1) (I let (A)=1). k = ?? After 4 half lives, beginning of the 5th, (A) = 1/24...

chemistry
The temperature at which a reaction is running is increase from 11.052 celsius to 102.567 celsius. If the rate constant increases by a factor of 5.608, what is the activation energy of the reaction in kJ/mol? Use the Arrhenius equation. I AM STILL LOST The Arrhenius equation i...

algebra
It is at that height going up and coming down in its path throughout its motion. The path is illustrated like an upside down u. The times are after leaving what propelled it upward and as it falls back to earth via gravity.

spelling
whirlwind is to breeze as downpour is to ?

trigonometry
Expanding the trinomial, (x+y+z)^n, gives terms X^rY^sZ^t where r+s+t=n and with a coeficient of n! over r!s!t!. a. use this pattern to expand (x+y+z)^3. b. find the sum of the coeficients in the expression of (x+y+z)^n. (LET x=y=z=1.)

trigonometry
suppose a manufacterer of transistors believes that, on the average, one defective transistor occurs in every 100 transistors. a. find the probability that a batch of 20 transistors has 2 defectives. b. find the probability that a batch of 20 transistors has at most 2 defectiv...

english/poetrey?
why do poets use diction? Thank you for using the Jiskha Homework Help Forum. For an excellent definition of "diction" try this site: http://bcs.bedfordstmartins.com/Virtualit/poetry/diction_def.html

#6, week 15
what peninsula do the Wolverines go past to get to Green Bay? Thank you for using the Jiskha Homework Help Forum. The Wolverines are from Michigan and the Green Bay Packers from Wisconsin. Get a good map and look between Michigan and Wisconsin. A peninsula is surrounded on 3 s...

Physics QUIZ
Rising air cools as a result of a decrease in barometric pressure with altitude. (Lapse Rate) True/False? When an inflatable life jacket is inflated with a compressed air cylinder the air inside the now inflated life jacket is much colder than it was prior to inflation when it...

Calc Jacobian
Thanks "I know that the xy region is the line x=y y=0 and y=1- x/2)" It is helpful to rewrite the region in the x-y plane by specifying the three lines and the endpoints, i.e. the points where they intersect. If you insert these points in the formula for U and V you ...

HAMLET!!!
How are the ghost’s entrances made impressive? Look at the lines of whoever's speaking just before the ghost appears each time. What is the topic of discussion? Are there any consistencies in this for the two times the ghost appears? ??

Health & Safety
I am an instructor at a small college in the UK. The college has recently purchased a multi media (POWERPONT) projector & lap top. I am keen to utilise this new medium in my lectures but in my opinion the college have not provided appropriate facilities to enable this. Other i...

bio
If our tongue is only sensitive to sweet, sour, salt, and bitter tastes, how are we able to detect so many different flavors? http://faculty.washington.edu/chudler/tasty.html

Trigonometry
What is cos (pi/2 - x) secx using the fundamental identities to simplify the expression. I think I have the right answer but I want to check to make sure. Well, cos (pi/2 - x) is something you should've seen already. It's just another name for sin(x). Also, sec(x) is t...

Ethics
We are studying Japanese in my Ethics class. It says in the reading they have many fatiths. Does anyone know why that is? What is fatiths? You might mean faiths, if so try: (Broken Link Removed) AND http://www.google.com/search?as_q=&num=10&hl=en&btnG=Google+Search&as_epq=japa...

math
please help me simplify this exponent 24^-1a^-3/6^-2b^-2 Basically it's this right?: (24^-1 * a^-3) / (6^-2 * b^-2) so: (1/24 * 1/(a^3)) / (1/(6^2) * 1/(b^2)) you should know that 6^2 = 36 so 1/(6^2) = 1/36 Now multiply: (1/(24a^3)) / (1/(36b^2)) Then flip: (24a^3) / (36b^...

math
5x^-1/-y^-1 once again, what are you asking? how is this simplified -y/5x Whenever you have anything raised to the negative power, flip it upside down. So: X^-1 = 1/X or X^-3 = 1/(X^3) Whenever anything is raised to the 1 power, it is itself. X^1 = X 12398719283719^1 = 1239871...

math
2k^-1/18m^-3 2k^-1/18m^-3 = 18m^3/2k

Science
A supersonic jet flying at 145 m/s is accelerated uniformly at the rate of 23.1 m/s squared for 20.0 s. a. What is its final velocity? b. The speed of sound in air is 331 m/s. How many times the speed of sound is the plane's final speed? I don't care what it is. Instea...

math
Determine whether there are 2 consecutive odd integers such that 5 times the first exceeds three times the second by 54. Can anyone help??? We're asked: Determine whether there are 2 consecutive odd integers such that 5 times the first exceeds three times the second by 54....

Math
What is the exact value of sin 5ð and how do you find it? type in the google search engine.. sin(5degrees) It will compute it for you. It appears you pasted something that the ASCII didn't translate. You'll need to type out the value for the angle.

Stoichiometry problem
@Malogis I agree 100% :P

history
The ingredient that someone gave to me for my Fijian banana scones is not clear because I don’t know how much milk I am suppose to pour in the recipe. Scone? Add enough milk to make a thick batter, as if you were making cornbread. Ask your mom what "thick batter"...

history
Hi, I have to make a Fijian recipe for my history class; I have chose to do Fijian banana scones, but unfortunately the recipe that I have found is not very good. I would greatly appreciate if someone helps me find clearer ingredients so I can make it. Thank you How about this...

history
Can someone please help me find information o Fiji. These are the topic I will be focusing on!

English
Can someone please find me a famous quote about being open minded? I thought I would use the quotes from forest Gump, but I’m not sure if it is correct! "Life was like a box of chocolates. You never know what you're gonna get." Try going to http://www.quotel...

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