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August 20, 2014

Posts by Ben


Total # Posts: 661

chemistry
Mechanism for the reaction between 3-methyl-2-pentene and HCl. is this right? %img836.imageshack.us/i/questionk%.jpg/% * delete the percentages for the link to work, its the only way i could post a link
February 19, 2011

chemistry
Write down the correct mechanism for the reaction between 3-methyl-2-pentene and HCL?
February 18, 2011

Econ
Consider the following consumption function. C = 200 + .75(DPI), Where C is consumption, autonomous spending is 200, the MPC is .75, and DPI is disposable personal income. Using the Graph below, graph the Consumption Function. C 100 0 = Income On the Graph, label the point ...
February 18, 2011

physics
jkjkjkjkjkjkjkjkjkjkjk
February 18, 2011

chemistry
thanks, but didnt really find the answer to my question...
February 17, 2011

chemistry
Im doing my lab report about steam distillation? and its asking me how i can tell if the two compounds i steam distilled are pure. but im not sure how to tell? i mean is the volatile or the nonvolatile compound the pure compound? or maybe the boiling point is what tells me if ...
February 17, 2011

chemistry
How can you tell if two compounds that you steam distilled are pure?
February 17, 2011

Business
what are the atributes of tomorrow's leaders according to linda hill?
February 17, 2011

Random Question
thanks alot!
February 12, 2011

Random Question
ok Thanks.
February 12, 2011

Random Question
Does anyone know of any jobs hiring now???
February 12, 2011

Algebra 1
How do you solve this algebraic equation using graphing? y = 3x - 1 y = -x + 1
February 12, 2011

Magnetism
Great, thanks a lot!
February 10, 2011

Magnetism
This is a circular coil and indeed the open area is 227 cm No not perpendicular but parallel from the coil (measured 30 cm away from above the coil). My Gauss meter is not sensitive enough to pick up the signal at this distance. Can you somewhat elaborate more on the various ...
February 10, 2011

Magnetism
I need to calculate the magnetic field strength at 30 cm distance of a coil with a diameter of 17 cm. Directly at the coil surface I measure 100 Gauss. Please advise.
February 10, 2011

math
Find the area of an equilateral triangle (regular 3-gon) with the given measurement. 6-inch side. A = sq. in.
February 1, 2011

Chemistry
How to know overall charge of molecule? see question # 12 here, why is it -1? how do you know? itech.pjc.edu/tgrow/2210/chm2210ps4sol.pdf
January 29, 2011

chemistry
Any easy way to remember the names and structures of functional groups? lol a lot to ask i know.?
January 28, 2011

math
Find the area of an equilateral triangle (regular 3-gon) with the given measurement. 9-inch perimeter A = sq. in.
January 28, 2011

Physics
A toy car coasts uphill at 2.34 m/s. It accelerates at -.34 m/s squared. How long will it take the car to stop.What equation would I use.
January 28, 2011

CHEM
Ok, thank you.
January 25, 2011

CHEM
Are these cations, how do i know? BF3, BH3, AlCl3, FeCl3 how do i recognize a cation?
January 25, 2011

chemistry
can fractional distillation be used to determine purity of a compound?
January 25, 2011

chemistry
Calculate the formal charge on each non-hydrogen atom in eachof the following molecules (show your work) i know the answer but can someone tell me how to get to the answer? 1) H2C=N=N(2 dots on top and on side) 2. H2C-N(3 bonds)C(2dots)
January 18, 2011

chemistry
Calculate the formla charge on each non-hydrogen atom in eachof the following molecules (show your work)
January 18, 2011

chemistry
hey
January 18, 2011

chemistry
okay, that helps a lot thanks!
January 18, 2011

chemistry
im not sure how to answer the questions.
January 18, 2011

chemistry
discuss if and when melting points can be used to determine the purity of organic and inorganic compounds and if and when melting points can be used to identify organic and inorganic compounds.
January 18, 2011

math
Hi
January 11, 2011

4th grade
8 and 3/4
December 15, 2010

chem class
Our teacher told us we had to do problems on our final on Delta G and S...? all he said is we'd have to plug in numbers from a list and solve. but im very confused. but the numbers he gave in the example are different from my book, is there soemthing we have to do to the ...
December 13, 2010

chemistry
Based on molecular mass and boiling point of the five compounds in the table below, which should have the high? est dipole moment: first # molecular mass 2nd: boiling point compound 1 244 203 compound 2 346 255 compound 3 250 138 compound 4 246 146 compound 5 241 100 i know ...
December 13, 2010

chemistry
How do you know when something has greater/smaller capacity? do you add them and the smallest one is for greater, and the biggest number is for smallest capacity? Which of the following solutions has the smallest buffering capacity? a. 0.821M HF and 0.217M NaF b. 0.821M HF and...
December 12, 2010

Physics
While traveling to school at 27 m/s your car runs out of gas 15 hm from the nearest gas station. If the station is 16m above your current elevation, how fast will the car be going when it reaches the gas station? Ignore friction.
December 7, 2010

Statistics
True or False In Regression Analysis if the variance of the error term is constant, we call it the Homoscedasticity property.
December 5, 2010

chemistry
In HPLC which column comes out first, if it is going forward or reverse? its a question on my final, please help?
December 1, 2010

chemistry
How to know if in TLC and HPLC if it is going forward or reverse?
December 1, 2010

physics
An aluminum wire of radius 3.10 10-4 m is stretched between the ends of 2 concrete blocks. When the system (wire and concrete) is at 35°C, the tension in the wire is 57.0 N. What is the tension in the wire when the system is heated to 185°C?
November 28, 2010

EDU
I have a 250 word elucidation of your collage that described all of the stakeholders and their primary roles
November 26, 2010

chemistry
The pH of a solution prepared by mixing 45 mL of 0.183 M KOH and 65 mL of 0.145 M HCl is i solved it but my answer is wrong. the right one is 1.97. am i missing a step? moles of HCl left over = (moles of HCl) – ( moles of KOH) moles of HCl left over = (0.009425 mol) –...
November 23, 2010

chem class
What is the concentration (in M) of hydroxide ions in a solution at 25°C with pH = 4.282?
November 23, 2010

chemistry
The pH of a solution prepared by mixing 45 mL of 0.183 M KOH and 65 mL of 0.145 M HCl is ?.
November 23, 2010

environment chem
how many moles of ozone does the atmosphere hold?
November 21, 2010

Chemistry
how many moles of ozone does the atmosphere hold?
November 21, 2010

Statistics
Let p1 represent the population proportion of U.S. Senate and Congress (House of Representatives) democrats who are in favor of a new modest tax on "junk food". Let p2 represent the population proportion of U.S. Senate and Congress (House of Representative) ...
November 21, 2010

Statistics
Let p1 represent the population proportion of U.S. Senate and Congress (House of Representatives) democrats who are in favor of a new modest tax on "junk food". Let p2 represent the population proportion of U.S. Senate and Congress (House of Representative) ...
November 21, 2010

chemistry
The rate law of the overall reaction. A + B -> C is rate = k[ A ]^2 Which of the following not increase the rate of a chemical reaction? a) increasing the temperature of the reaction b)increasing the concentration of reaction A c)adding a catalyst for the reaction d)...
November 18, 2010

chemistry
A possible mechanism for the overall reaction Br2 (g) + 2NO (g) -> 2NOBr (g) is NO (g) +Br2 (g) (equilibrium arrows: on top it says k1 and on bottom k-1) NOBr2 (g) (fast) step 1 NOBr2 (g) + NO (g) ->(on top of arrow k2) 2NOBr (slow) step 2 the question: which of the ...
November 18, 2010

math
if you drive 117 miles in 2 1/4 hours, what is your average speed?
October 31, 2010

math
BLIND BATS AT HALLOWEEN There were number of bats in a cave. Two bats can see out of right eye, Three bats can see out of left eye, Four can't see out of left eye, and Five can't see out of right eye. What is the least number of bats in the cave & what might their ...
October 26, 2010

chemistry
Why did i get this question wrong? its about a u shaped tube with a simepermeable membrane 0.3 M Fe (NO3)2 <~ U ~> 0.5 M sugar 0.1 M NaCl So I did this: 0.3 x3 = 0.9 0.5x1=0.5 0.1x2=0.2 = 0.7 so i chose the answer increase in the water level to the left side of the tube...
October 26, 2010

chemistry
The question below, i was wondering if it decrease because the N2 is on the right and so to add to left it would be too much so it gets rid of it by decreases and doing to the right? because the left side is (+) endothermic? sorry im a little confused. if the number was ...
October 25, 2010

Chem
How can i determine that the volume is decreasing? Of the following equilibria, only ??? will shift to the left in response to a decrease in volume. A) 2HI <->(g) H2 (g) + I2 (g) B) N2 (g) + 3 H2 (g)<-> 2 NH3 (g) C) 4 Fe (s) + 3 O2 (g)<-> 2 Fe2O3 (s) D) 2 SO3...
October 25, 2010

Statistics
In a poll of 1,004 adults, 93% indicated that restaurants and bars should refuse service to patrons who have had too much to drink. Construct the 90% confidence interval for the proportion of all adults who feel the same way.
October 24, 2010

chemistry
to calculate Ea i solved for slope and i got -7.6111x10^3 so i did this for Ea: 7.61x10^3 x 8.314/mole= 63.3 KJ/Mol but someone told me im missing the number 2.30? that i have to mulitply (2.30)(8.314)(7.61x10^3)=? which is right? to get the original -7.6 answer i used the two...
October 24, 2010

chemistry
to get the original -7.6 answer i used the two lowest two points here and subtracted: x y 3.50E-03 -11.7 3.14E-03 -8.96 3.28E-03 -9.75 (-11.7) - (-8.96) -------------------------- (3.50x10^-3)-(3.14 x10^-3) = -7.6111x10^3
October 24, 2010

chemistry
to calculate Ea i solved for slope and i got -7.6111x10^3 so i did this for Ea: 7.61x10^3 x 8.314/mole= 63.3 KJ/Mol but someone told me im missing the number 2.30? that i have to mulitply (2.30)(8.314)(7.61x10^3)=? which is right?
October 24, 2010

chemistry
to calculate Ea i solved for slope and i got -7.6111x10^3 so i did this for Ea: 7.61x10^3 x 8.314/mole= 63.3 KJ/Mol but someone told me im missing the number 2.30? that i have to mulitply (2.30)(8.314)(7.61x10^3)=? which is right?
October 24, 2010

chem help
im doing a graph for chem lab with excel. my classmate created a graph with these coordinates: X: 3.50 X10^-3 3.14X10^-3 3.28X10^-3 Y: -11.7 -8.96 -9.75 They got R2=0.998 but i got y = -3074.9x R² = 0.6291 why is it wrong. im desperate please help! screen shot of my graph...
October 23, 2010

economics
why might an economist look at hundreds of cars moving along an assembly line and call it an example of scarcity
October 19, 2010

chemistry
is rbi2 an ion?
October 13, 2010

chemistry
Use bond energies to predict the molar enthalpy of combustion of acetylene gas. 2C2H2 + 5O2--> 4CO2 + 2H2O I am confused as to how to do the 2C2H2 in relation to the bonds? how many c-c bonds would there be, or would they be triple bonds?
October 11, 2010

chemistry
Naturally occuring boron is 80.20% boron-11 and 19.80% of some other isotopic form of boron. What must be the atomic mass of this second isotope be in order to account for the 10.81 amu average atomic mass for boron?
October 10, 2010

8th grade
what do you call someone who cant turn pancakes?
October 6, 2010

physics
A dart gun is fired while being held horizontally at a height of 1.00 m above ground level and while it is at rest relative to the ground. The dart from the gun travels a horizontal distance of 5.00 m. A college student holds the same gun in a horizontal position while sliding...
October 3, 2010

keyboarding
You're putting together a memo and have additional material to staple to it. What word should you type below the reference initials?
October 1, 2010

calculus
Use the function defined below to calculate the indicated derivative. f(t)= 4/(t^3)+3 what is f''(2) (second derivative) Need help!!
September 22, 2010

CHEM
oops, thanks for the help!
September 16, 2010

CHEM
The vapor pressure of pure water at 25 °C is 23.8 torr. Determine the vapor pressure (torr) of water at 25 °C above a solution prepared by dissolving 35 g of urea (a nonvolatile, non-electrolyte, MW = 60.0 g/mol) in 75 g of water. where have i made a mistake? 35g/60=0....
September 16, 2010

About Chemistry
The vapor pressure of pure water at 25 °C is 23.8 torr. Determine the vapor pressure (torr) of water at 25 °C above a solution prepared by dissolving 35 g of urea (a nonvolatile, non-electrolyte, MW = 60.0 g/mol) in 75 g of water. im not sure about the steps for ...
September 15, 2010

Chemistry
Calculate the amount of heat required to raise the temperature of a 54 g sample of water from 5°C to 20.°C.
September 15, 2010

math
0.331,0.332,0.333
September 15, 2010

Chemistry
What is the formula of a substance that contains 0.0920 g of C and 0.0180 g of H?
September 7, 2010

math
One of the angles of a right triangle measures 30°, and the hypotenuse is 10 inches long. How long is the side opposite the 30° angle?
September 5, 2010

geometry
The side of a triangle opposite a 58° measures 15 inches. To the nearest hundredth of an inch, what is the length of the side opposite a 53° angle
September 5, 2010

Calculus
No. I have no idea how to do this. I did part a and part be right but i cant do this part c
September 3, 2010

Calculus
Compute the average velocity over time intervals [4, 4.01] , [4, 4.001] , [4, 4.0001] , [3.9999, 4] , [3.999, 4] , [3.99, 4] . Use this to estimate the object's instantaneous velocity at t=4 V(4) = ???? ft/ec How do i even approach this problem?
September 3, 2010

Calculus
How do I find the instantaneous ROC at x=1.5
September 3, 2010

English (E-mail Writing)
Thanks a ton for the link, I really appreciate it!
July 27, 2010

English (E-mail Writing)
Oh wow, thanks a lot. I guess I was looking for something longer, because her e-mail was a good 6 paragraphs or so. When writing these sorts of e-mails, is there a trick to make it seem more formal and not informal?
July 27, 2010

English (E-mail Writing)
I want to do some research with a professor on campus, but I'm having a lot of trouble composing this e-mail. She sent me a long e-mail with stipulations for joining her lab and at the end it basically says "If you agree to all this, let me know and we'll set up a...
July 27, 2010

college math213
Try putting the parentheses around two numbers and figure out what you get. Don't forget that you do operations in parentheses first. For example: 16-7+5=4 You could do: (16-7)+ 5 = 4 OR 16-(7+5) = 4 Which one would be right?
July 27, 2010

Physics
A machine carries a 4.5 kg package from an initial position of di = (0.50 m) + (0.75 m) + (0.20 m) at t = 0 to a final position of df = (7.60 m) + (12.0 m) + (7.30 m) at t = 11 s. The constant force applied by the machine on the package is F = (2.00 N) + (4.00 N) + (6.00 N...
July 22, 2010

math
(x^4 - 8x^2 + 15) = (x^2-3)(x^2-5) so there will be a (x^2-3) term in the numerator and denominator that will cancel leaving (x^2-5)
July 17, 2010

Pythagorean Theorem
40 cm
July 15, 2010

ap chemistry
yeah sorry
July 7, 2010

ap chemistry
The vitamin niacin can be isolated from lover, yeast, milk, and whole grain. Which source would be the best for a multivitamin tablet
July 7, 2010

algebra
if x varies inversely as w, and z=40 when w=.06, fine z when w=20
June 24, 2010

american government
2. In federalism, the national government (Points : 1)
June 23, 2010

physics
Two packages at UPS start sliding down the 20° ramp shown in Figure P8.25. Package A has a mass of 3.5 kg and a ­coefficient of friction of 0.20. Package B has a mass of 10 kg and a coefficient of friction of 0.15. How long does it take package A to reach the bottom?
June 16, 2010

Computer Science JAVA FUNCTIONS
Write a Function You will be given one of the following problems to solve using and writing Python functions. Given a list of words, return an array which indicates the frequency that each letter occurs. For example, in the list [”apple”, ”bob”], [ ’a...
May 31, 2010

computer science
Hey I have three questions with creating these methods can any of you guys write an example code for this? Thanks Write a Function You will be given one of the following problems to solve using and writing Java functions. 1. Given a list of words, return an array which ...
May 28, 2010

computer science
Hey I have three questions with creating these methods, thanks. Write a Function You will be given one of the following problems to solve using and writing Java functions. 1. Given a list of words, return an array which indicates the frequency that each letter occurs. For ...
May 28, 2010

algebra
length and width of a rectangle A=198 in width =x length =x+7
May 15, 2010

physics
The potential energy stored in the compressed spring of a dart gun, with a spring constant of 36.00 N/m, is 0.880 J. Find by how much is the spring is compressed.
May 10, 2010

physics
The potential energy stored in the compressed spring of a dart gun, with a spring constant of 36.00 N/m, is 0.880 J. Find by how much is the spring is compressed.
May 10, 2010

physics
The potential energy stored in the compressed spring of a dart gun, with a spring constant of 36.00 N/m, is 0.880 J. Find by how much is the spring is compressed.
May 10, 2010

geometry
the slope of a line that is perpendicular to (2,4) and (-1,0) is
May 10, 2010

4th grade
Hi
May 6, 2010

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