Friday

January 20, 2017
Total # Posts: 2,203

**chemistry**

The standard solution of FeSCN2+ (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN) has an absorbance of 0.520. If a trial's absorbance is measured to be 0.275 and its initial concentration of SCN– was 0.00060 M, the equilibrium ...

*April 14, 2008*

**chemistry**

thanks

*April 10, 2008*

**chemistry**

The correct interpretation of the equation below is:? Fe3+(aq) + SCN¨C(aq)¡ú FeSCN2+(aq) A. The reaction is incomplete because the product is still charged. B. A heterogeneous equilibrium exists because of the charged ions. C. The equilibrium constant is Kc...

*April 10, 2008*

**chemistry**

the concentration of OH ions in a household ammonia cleaning solution is0.0035M. Calculate the concentration of H ions. would it be pH=-log (.0035)??? or Kc=1/.0035???

*April 10, 2008*

**chemistry**

If a solution is diluted, say by adding 100ml of solvent, does the number of moles of solute change? Does the concentration increase, decrease, or stay the same? i think it depends on what the solvent is, for example if its water then the concentration would decrease?? please ...

*April 10, 2008*

**Algebra 2**

A package with square ends has a combined length and girth (girth is the perimeter of a cross section) of 120 in. The surface area of the entire package is 3600 sq. in. Determine the dimensions of thr package. s in.*s in.*l in. one solution is: 11.08in*11.08in*75.68in. find ...

*April 8, 2008*

**chemistry**

how would i do something like this? Calculate the concentration of borate ion for each titration. Use the borate ion concentration to determine Ksp at each temperature.

*April 8, 2008*

**chemistry**

thanks soo much

*April 8, 2008*

**chemistry**

1)Does the solubility of borax in water increase or decrease as temperature increases? 2)Is the solvation of borax in water an exothermic or endothermic process? please help ive tried asking my ta but i cant understand him. he explains it through this weird process.

*April 8, 2008*

**chemistry**

Which of the following is NOT true of colligative properties? Colligative properties are... A. dependent on the mass of solute present. B. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. C. independent of the chemical ...

*April 7, 2008*

**chemistry**

thanks sooo much

*April 7, 2008*

**chemistry**

When 18 g of ethylene glycol C2H6O2 is dissolved in 150 g of pure water, the freezing point of the solution is _C . (The freezing point depression constant for water is 1.86C kg) what i tried was 18/62 to find the moles. then i got .29/.150 to solve for the molality. then i ...

*April 7, 2008*

**chemistry**

thanks. sorry i go to ucla.hahaha

*April 7, 2008*

**chemistry**

Solid borax dissolves in water according to the equation: Na2B4O7 10H2O(s) 2Na+ (aq) + B4O5(OH)42–(aq) + 8H2O(l) The sign of Ssys will be A. positive B. negative because there are A. more B. less moles of products generated. i've tried solving this problem and i think...

*April 7, 2008*

**math riddle ALGEBRA WITH PIZZAZZ**

They are made for two wrists.

*April 6, 2008*

**Accounting Multiple choice**

ACON lTD ACQUIRES THE ASSETS AND ASSUMES THE LIABILITIES OF BIRD LTD WHICH HAVE OPEN MARKET VALUES OF A Assets $120,000 Liabilities $15,000 Acorn is to issue a debenture of $50,000 and 10,000 $1 Ordinary shares for the balance of consideration. What will be the credit to the ...

*April 3, 2008*

**math**

This cube has five cubes along each edge. The faces are covered, but the cube is hollow inside. Can it be divided into two pieces of equal volume? Explain. I am not sure what this question is asking? Does this look right? l x w x h= 5x5x5=125 125/2=62.5 Both sides have 62.5, ...

*April 2, 2008*

**chemistry**

d is the correct answer

*April 2, 2008*

**gr 7 math**

This cube has five cubes along each edge. The faces are covered, but the cube is hollow inside. Can it be divided into two pieces of equal volume? Explain. I am not sure what this question is asking?

*April 2, 2008*

**Calculus - Integrals**

I made this question, just wanted to make sure it didn't drown under the tide... I've set a problem up, something like this. s^4: A+D=0 s^3: -2A+B-3D+E=0 s^2: 2A-B+C+3D-3E=0 s^1: -2A+B-D+3E=4 s^0: A+C-E=4 Count Iblis -It's easier to substitute for s the values that...

*March 25, 2008*

**Calculus - Partial Integrals**

I'm confused. As soon as I get the so called 'Basic Equation,' I just don't know what to do after....

*March 25, 2008*

**Calculus - Partial Integrals**

The paragraph after the thing with s as a variable is copy and pasted from Count Iblis.

*March 25, 2008*

**Calculus - Partial Integrals**

I made this question, just wanted to make sure it didn't drown under the tide... I've set a problem up, something like this. s^4: A+D=0 s^3: -2A+B-3D+E=0 s^2: 2A-B+C+3D-3E=0 s^1: -2A+B-D+3E=4 s^0: A+C-E=4 It's easier to substitute for s the values that make the ...

*March 25, 2008*

**Calculus - Partial Fractions**

Would anybody mind showing it out? I tried what Count Iblis said, but it didn't really work out well...

*March 24, 2008*

**Calculus - Partial Fractions**

I'm sorry. I forgot to say that I don't know how to solve for A, B, C, D, and E... Help there would be appreciated.

*March 24, 2008*

**Calculus - Partial Fractions**

I've set a problem up, something like this. s^4: A+D=0 s^3: -2A+B-3D+E=0 s^2: 2A-B+C+3D-3E=0 s^1: -2A+B-D+3E=4 s^0: A+C-E=4

*March 24, 2008*

**Calculus - Integrals**

That's my problem. When I tried solving for A, B, C, D, and E in that first problem, it didn't really work out right...

*March 24, 2008*

**Calculus - Integrals**

1) A/x + B/(1+x) 2) A/x + B/x^2 + C/(1+x) I think I'm right....

*March 24, 2008*

**Calculus - Integrals**

I'm not quite sure about your explanation on Partial Fractions... And Liouville's Therom. We haven't done that in class... so...

*March 24, 2008*

**Calculus - Integrals**

I have 3 questions, and I cannot find method that actually solves them. 1) Integral [(4s+4)/([s^2+1]*([S-1]^3))] 2) Integral [ 2*sqrt[(1+cosx)/2]] 3) Integral [ 20*(sec(x))^4 Thanks in advance.

*March 24, 2008*

**Calculus - Integrals**

Could you expand on #1 a bit more? I tried Partial Fractions, but I couldn't get a definite answer...

*March 23, 2008*

**Calculus - Integrals**

I have 3 questions, and I cannot find method that actually solves them. 1) Integral [(4s+4)/([s^2+1]*([S-1]^3))] 2) Integral [ 2*sqrt[(1+cosx)/2]] 3) Integral [ 20*(sec(x))^4 Thanks in advance.

*March 23, 2008*

**critical thinking**

premise--terrorists attacks of September 11, 2001, produced a response among American officialsm the media and public conclusion--matched only by the attack on Pearl Harbor

*March 20, 2008*

**APA FORMATTING**

I think it's C. Am I right? When using APA, which of the following describes the method in which a work without page numbers should be presented in in-text citations? A. No mention of the page number is required in APA B. If no page number is present, it is not a credible ...

*March 19, 2008*

**English**

I think it's a, but document formatting messes me up a little :) Any help would be great, and much appericated When citing a source within the body of your essay, what must be included after the quotation marks at the end of the sentence (when the author’s name has ...

*March 19, 2008*

**Geography AS level**

why are waterfalls tempary features

*March 18, 2008*

**Oceanography**

What are the steps and timing of the whales, dolphins, porpoises evolution.

*March 13, 2008*

**Oceanography**

How did the extinction of the Mesozoic marine megafauna allow evolution of cetaceans?

*March 13, 2008*

**Business Ethics**

In the case study of Geletx, what should Jed do? Is this a violation of FAPA?

*March 12, 2008*

**Social studies**

all I need to know is is it hudusim or Buddism?

*March 8, 2008*

**Social studies**

of Hindusim and Buddhism which has a definite indentifiable start?

*March 8, 2008*

**Social studies**

What is the climatic issue that significantly influences the Indian subcontinent?

*March 8, 2008*

**social studies**

What architectural wonder was completed in 1648?

*February 28, 2008*

**engineering physics 2**

A 19 m long piece of wire of density 8.34 g/m3 has a diameter of 12.593 mm. The resistiv- ity of the wire is 1.7e-8(ohm)(m) at 20 degrees celsius. The temperature coefficient for the wire is 0.0038(degrees celsius)^-1. Calculate the resistance of the wire at 20degrees Celsius...

*February 28, 2008*

**chemistry**

2Al+3Cl2=2AlCl3 calculate the amount(number) of excess reagen units remaining when 4.03x10^23 Al atoms and 6.42x10^23 Cl2 molecules react? please help!!!!! thanks

*February 23, 2008*

**french**

does any one know the french meaning of la nouvelle .

*February 23, 2008*

**year 7 french**

i need to translate countries written in french into english . does anyone know if there are any good sites that will help me. thanks

*February 23, 2008*

**math**

I tried to answer this but i don't know if i am even close. I included my work .Thanks. The island's travelling sales monkey is selling gold watches that washed up on the beach. The islanders use green stones, pink clamshells and ox horns for money.Sixty-two green ...

*February 13, 2008*

**grade 7math**

The island's travelling sales monkey is selling gold watches that washed up on the beach. The islanders use green stones, pink clamshells and ox horns for money.Sixty-two green stones have the same value as 17 ox horns and 258 pink clamshells have the same value as 89 ...

*February 13, 2008*

**Economics**

In running a regression model with three variables, two of the three come back as statistically significant at the 95% level of confidence. The one that doesn't is the intercept - so is my model still valid?

*February 9, 2008*

**math**

Thanks so much.I worked on this while i was waiting and ended up doing it backwards from you but got the same answer. 150+6=156 156/13=12 364+26=390 390/13=30 60+5=65 65/13=5 60 is the common multipler, so i got 60 days. Is this still right?

*February 6, 2008*

**math**

I really don't know where to start or what stratedgy to use.

*February 6, 2008*

**math**

Days on Planet Red are 13 hours long. The animals on Planet Red have regular eating and sleeping habits. The silver snake sleeps for 150 hours, eats for 6 hours, then goes back to sleep. The green walking fish sleeps for 364 hours, eats for 26 hours and then goes back to sleep...

*February 6, 2008*

**Physics**

Can I use P1/P2=(T1/T2)y/y-1 to find the temperature when we pressure liquid refrigerant, for example liquid propane?

*February 6, 2008*

**Physics 11**

The brakes on a car permit it to decelerate at the rate of -8.0m/s^2. How much distance is required to stop this car when it is travelling 60.0km/hr? The answer given is 173.6m I solved it this way 60km/h = 16.667m/s A=V/T 16.667m/s / -.80m/s^2 = 20.834 seconds D=RT 16.667m/s ...

*February 6, 2008*

**History**

Yea i thinks its D also... all the other answers are not as good, so im goin with that Palmer. Page 462 is what ive found Right under the purple section...

*February 2, 2008*

**Chemistry**

A 15.0g sample of liquid ethanol, C2H5OH, absorbs 5.13x10^3 J of heat at its normal boiling point, 78.0C. The molar enthalpy of vaporization of ethanol is 39.3kJ/mol. (a) What volume of ethanol vapor is produced? The voume is measured at 78.0C and 1.00atm pressure. (b) What ...

*January 27, 2008*

**social health**

I want a picture of social health

*January 23, 2008*

**science**

how does a magnet attract a paperclip ?

*January 7, 2008*

**Chemistry**

If I have 1.27 cm^3, how do I convert into picometers?

*January 2, 2008*

**Chemistry**

Metallic sodium adopts a body-centered cubic structure at 25 degrees C and 1 atm. The density of sodium under these conditions is 0.97 g/cm^3. What is the unit cell length?

*January 2, 2008*

**math**

haylee is geting a job for moing lanws her dad lowns her 190 dollars to by a lawn mower. when she startes she is in depth 190 dollars. in week two she is in depth 70 dollars. how did she get to be depth 70 dollars

*December 16, 2007*

**Chemistry**

Use the equation, PV = nRT n = 3mol T = 273K P = 101.325kPa = 1atm R = .08206L•atm/K•mol Solve for V

*December 10, 2007*

**Calculus**

The question is, if f(x) is equal to the series from n to infinity of a sub n times (x-7)^n for all n, find a formula for a sub 10. (I apologize for typing it out in the way that I did, but it was the only way I could. I don't quite understand what is being asked here. I ...

*December 10, 2007*

**math mesurment**

how many grams in a pound

*November 26, 2007*

**physical science**

How much force is needed to accelerate a 50-kg rider and her 250-kg motorcycle at 5 m/s2?

*November 19, 2007*

**pigskin geography**

Are there more than 3 cities which will be visited by a team from a bordering state? Question 1 week 10 November 11, 2007

*November 12, 2007*

**pigskin geography**

Are there more than 3 cities which will be visited by a team from a bordering state? Question 1 week 10 November 11, 2007

*November 12, 2007*

**homework ath physics**

how to become en expert?

*November 7, 2007*

**Mathematics**

I have to show that for any (pi)A, Sin(A)squared + Cos(A)squared = 1. I don't really get the question... am I supposed to multiply A by pi? Even if that weren't the case, I still do not comprehend how the squared sine and cosine will cancel out... I'd really ...

*November 6, 2007*

**math**

3/7x+5=8. I tried to cross-mulitplied and I got 3x+35=8. I divided -27 by 3 and I got -9. Is this right?

*November 1, 2007*

**math**

A particle moves with constant speed of 3m/sec along path y=3x^2 What is the acceleration of the particle at x=1.5m? I know that Velocity is y'=6x Somebody please help!

*October 25, 2007*

**physics**

A particle moves with constant speed of 3m/sec along path y=3x^2 What is the acceleration of the particle at x=1.5m?

*October 25, 2007*

**physics**

i did GM5850/4.15E6^2= 5850*217183.3^2/ 4.15E6 my V was 217183.3 then when i solved for GM i got 1.9574E37 and pluged that into the weight equation and it was marked wrong. someone please help

*October 18, 2007*

**Art**

Can anyone provide help with finding a site that shows how American pop culture has influenced art throughout the world?

*October 10, 2007*

**math**

The summ of two numbers is two. THe difference between eight and twice the smaller number is two less than four times the larger. Find the two munbers.

*September 30, 2007*

**Ethics**

First, we must demand more of our leaders. If we do not get the result you want, change your leaders. Emphasize education. A good education is an important way to improve the odds for any children. The whole community needs to make education a top priority. The importance of ...

*September 27, 2007*

**Ethics**

What are some solutions the the economic challenges of Aferican Americans?

*September 27, 2007*

**Ethics**

Why are racial imbalances in our economy difficult to overcome?

*September 27, 2007*

**Math/Metric system**

I need to know how to make conversions and compare within the metric system of measurement. Such as 0.75L. is equal to how many mL. I have to do problems like that with length, weight, andvolumn.

*September 25, 2007*

**Religious Eduction**

Shahadah, Salah, Zakah, Sawm, and Hajj. en(dot)wikipedia(dot)org(forward slash)wiki(forward slash)Five_Pillars_of_Islam

*September 22, 2007*

**English**

searching for evidence in the novel Being There by Kosinski that the author dislikes humans and Americans

*September 15, 2007*

**Physics**

oh but yeah u first use the equation v=v(0)+at and then use y=v(0)t+1/2at^2. Set v(0) to zero each time and a to either -9.8 m/s if it is going upward or 9.8 m/s if it is going downward

*September 12, 2007*

**grammar**

I have homework in grammar and the title is Giving Instruction in Reponse to Expository Writing Prompts so I have choose an electroni apppliance with which I am familiar with and write directions for a friend that explain an important procedure in the use of the appliance and ...

*September 9, 2007*

**algebra 3**

how do i solve square root of 72x to the 3rd power?????

*August 23, 2007*

**Math**

I need help with the following problem: Directions: Express each answer in simplest form in terms of the given variable. Problem: An angle has measure Xº. Find the average of the measures of a complement and a supplement of the angle.

*August 20, 2007*

**Geography**

where are most of australias cities located

*August 15, 2007*

**Finacial**

Develop a set of pro forma financials (income statement and balance sheet only) for the next fiscal year-end using the percent-of-sales method. Assume that the company's sales have increased by 15%.for Exxon corp. balance sheet and income statement can be found on the web....

*August 6, 2007*

**math**

how can you simplify this?? log10(10^.5) log10 as in log base 10 By definition: Log_10[10^(x)] = x ok, but it is 10 to the 1/2 power, not x how would you simplify it then? That's then the special case of x = 1/2: If for all x: Log_10[10^x] = x, then for x = 1/2 this ...

*July 14, 2007*

**eth 125**

There are those who profess to be bible thumping right wing Christians who are the most intolerant and prejudicial people anywhere. usually, knowledge, education, and understanding can promote acceptance and tolerance. People need to develope a live and let live attitude. ...

*June 30, 2007*

**Accounting**

What is an example of present value concept? If you win the lottery, and they tell you will get 20,000 a year for 30 years. What is that worth in present dollars? $36000.00

*June 28, 2007*

**Algebra**

How do you arrive at the answer for: what is the value of t in the following problem? 9 = t + 7s subtract 7s from both sides.

*June 22, 2007*

**Accounting**

How might borrowing $1 million long-term and investing the proceeds in inventory affect cash and net working capital? Borrowing $1 million and investing the proceeds will increase the cash and net working capital by $1 million less the interest charges.

*June 10, 2007*

**Accounting**

How would paying out a $2 million cash dividend affect cash and net working capital? It seems to me that paying out a $2 million cash dividend will diminish the cash and net working capital by $2 million plus the costs of paying this dividend.

*June 10, 2007*

**COM 125**

can you please help me paraphrase this paragraph. The eradication of al-Qaeda is as much an intelligence and law enforcement challenge as it is a purely military campaign. While special operations, commando raids, and air strikes are important weapons against bin Laden's ...

*May 28, 2007*

**humanities**

To accept the old into the modern

*April 28, 2007*

**math**

The amount of money in an account with continuously compounded interest is given by the formula A=Pe^rt , where P is the principal, r is the annual interest rate, and t is the time in years. Calculate to the nearest hundredth of a year how long it takes for an amount of money ...

*April 22, 2007*

**science**

Put a pencil straight down into a glass of water. Notice whether the pencil looks bent. Now tilt the pencil and note how its apparent bending changes. How does this illustrate why light from objects near the horizon is refracted more strongly? Is the atmosphere thicker looking...

*April 16, 2007*

**work force**

a force of 10 pounds is required to stretch a spring of 4 inches beyond it's natural length. assuming hooke's law applies, how much work is done in stretching the spring from its natural length to 6 inches beyond its natural length. what i did so far: F(x)=kx 10=k4 k=5...

*April 13, 2007*

**calculus**

how do you calculate the instantaneous rate of change. is that the derivative. also: if f is the antiderivate of (x^2)/(1+x^5 such that f(1)=o then f(4)=? How would i find the integral of that? i don't even know what the first step is to get the answer. also, on this ...

*April 13, 2007*