Wednesday

March 4, 2015

March 4, 2015

Post a New Question | Current Questions

**chemistry**

1. A three-step mechanism has been suggested for the formation of carbonyl chloride: Step 1: Cl2 ===> 2 Cl (fast equlibrium) Step 2: Cl + CO ===> COCl (fast equilibrium) Step 3: COCl + Cl2 ===> COCl2 + Cl (slow) What is the molecularity of the rate-determining step? ...
*Friday, February 9, 2007 at 7:09pm*

**history**

When were US children required to go to school? The earliest compulsory education was in Massachusetts Colony in the 1640s. Thereafter each colony and state enacted its own required school attendance laws. By 1918, all states required children to at least complete elementary ...
*Saturday, February 3, 2007 at 1:02pm*

**Chemistry**

Given 2Al2O3 (s) --> 4Al(s) + 3O2 (g) (standard enthalpy change= 3351.4 kJ) a) What is the heat of formation of aluminum oxide? How do I find heat of formation from standard enthalpy change? I know how to do it when I'm given enthalpy, but they aren't the same thing...
*Wednesday, January 31, 2007 at 8:40pm*

**First Amendment Question**

Which would be permitted under the establishment clause of the First Amendemnt? 1. A public elementary school inviting a local pastor to visit each morning to open the day with a prayer in the gym for any students who wish to attend. 2. Public high school students voluntarily ...
*Thursday, January 25, 2007 at 6:48pm*

**physics**

for the current density equation (I) , solve for dV/dx when I = 0 I = - [ uz2F[C] dV/dx + uzRT d[C]/dx] According to your equation. dV/dx= uzRT/uz2[C] d[C]/dx I am uncertain what your symbols mean. It's supposed to be the current density equation I think?? My teacher also ...
*Tuesday, January 23, 2007 at 7:18am*

**english**

hi im indiya and im here to ask you a interesting question well my question is do you no a website about balanced reports based on why children are given homework? The why is simple: Practice. Humans learn by repetition spaced over time. The average task takes 14 repetitions (...
*Thursday, January 11, 2007 at 2:45pm*

**math**

Factor: x^3 - 3/4x - 1/4 The answer is: (x - 1)(x + 1/2)^2 How do I learn to do that? I'd like to reread an appropriate chapter from an appropriate textbook and do practice problems. It takes experience and practiced eye. Algebra books have chapters on factoring; ask your ...
*Tuesday, January 2, 2007 at 1:59am*

**World History Paper**

Please give feedback on the following paper: The American Revolution and the French Revolution each greatly affected many people and how the countries were run. This essay will consider the impact of these two revolutions on economy, revolutionary thought, social, political ...
*Tuesday, December 5, 2006 at 12:58pm*

**Probability**

Roll two fair dice. what is the probability that you get a 2 and a 5 without regard to which is on which die? What is the probability of at least one 2 or one 5? What is the probability of a sum of 7? "what is the probability that you get a 2 and a 5 without regard to ...
*Sunday, December 3, 2006 at 5:23pm*

**help correct please**

I hope these corrections weren't too late, but I have the feeling they were. I think the Cal State and UC applications have to be postmarked by midnight on Nov 30, right? If so, please make sure you also work on NOT doing things that are this important at the last minute...
*Friday, December 1, 2006 at 1:42am*

**essay**

During my four years in high school, I have taken a lots of classes to prepare for college. As I took ELD classes ( English Language Development ) during my freshman and sophomore year, I realized that I could not meet the college's requirement. So in my senior year, I ...
*Thursday, November 30, 2006 at 10:17pm*

**inverse**

If f(x)=cosx + 3 how do I find f inverse(1)? Thanks y = cos(x) + 3 the inverse of this is x = cos(y) + 3 solve for y and you have your inverse The cos function only has a range of [-1,1], so the range of f(x) is [2,4]. this means f inverse of 1 doesn't exist. I didn't ...
*Friday, October 20, 2006 at 1:22pm*

**math**

A certain football league has the following scoring system: - each field goal counts for 5 points - each touchdown counts for 3 points The only way to score points is with some combination of field goals and touchdowns. They have noticed that not every score is possible in ...
*Sunday, October 15, 2006 at 12:45pm*

**phys**

Suppose a newly found elementary particle has an average lifetime, T=30 ns, when at rest. In order for this new elementary particle to travel 15m in one lifetime, how fast must it be moving relative to the velocity of light? In other words, find v/c.
*Thursday, October 12, 2006 at 10:56pm*

**Elementary Math**

Find the missing numbers and landmarks for the set of numbers: 48, 50, 51, 51, 57, 59, 60, 63, 69, ______ , 76, ______ . A Range: _____ B. Mode: __76__ C. Minimum: __48__ D. Maximum __76__ Help - we don’t understand this, or see a pattern. Range = Maximum - Minimum Mode ...
*Monday, October 2, 2006 at 5:02pm*

**Physics**

I have posted this one before, but the help I received went over my head... Firemen are shooting a stream of water at a burning building. A high-pressure hose shoots out the water with a speed of 21.0 m/s as it leaves the hose nozzle. Once it leaves the hose, the water moves ...
*Monday, September 18, 2006 at 5:30pm*

**Math**

A farmer was taking her eggs but they all fell on the floor. She didn't know how many eggs she had. But then she remembers when she put them in groups of two, there was one egg left over. When she put them in groups of three, there was also one egg left over. The same ...
*Friday, September 15, 2006 at 4:21pm*

**4th Grade math**

Solve. I have no digits the same. My thousands digit is less than my tens digit. My hundreds digit is twice my ones digit. If you add my digits, the sum would be 25. Who could I be? Could I be 2 numbers? We can not figure this out. Can someone help please. Let's find out ...
*Thursday, September 7, 2006 at 11:08pm*

**making dot arrays**

what are the numbers calleed that we cant use in 2 - row arrays I'm curious to know what class is making dot-arrays? If you can give some kind of answer I'll try google searches to find and answer. It's becoming apparent to me that the term array is being used with...
*Thursday, August 31, 2006 at 6:12pm*

**elementary brainteaser**

My college teacher gave us a brainteaser for elementary kids and I can not figure it out! next letter: s,m,h,d,w,m,_? ok seconds, minutes, hours, days, weeks, months, ?? then what? next is years years? Ok, yes. Years is the next term in the sequence I gave, but the letter &...
*Sunday, August 27, 2006 at 5:10pm*

**math - algebra**

When solving equations by adding integers, what does it mean when one number is in parenthisis? Do you do something different when they are in parenthisis? Example below: 36 + (-28) + (-16) + 24 = y Thank you Numbers in parenthesis means the number is what it is. In the ...
*Friday, August 18, 2006 at 8:32pm*

**fallacies in philosophy**

I don't know what colleges are teaching these day! I have just received a letter of application from a young man who graduated from the state university las June. It was a wretched-letter badly written. with elementary errors in spelling. punctuation, and grammar. The ...
*Sunday, June 18, 2006 at 9:58pm*

**ART--please anyone**

Can someone help me? In the picture given on the above site, I have to determine if it shows elements of naturalism and idealism. If is abtract or not. Is a photo of a sphinx supposed to show up? With this description: Sphinx of Senwosret III, ca. 1878–1841 B.C.E.; ...
*Saturday, June 17, 2006 at 11:20am*

**Math: Integers**

Hey guys! I need help with this problem..it tells me to write a number line to tell the answer..the question is : What is the smallest integer greater than -2.1? Is it to -2 right? I have no idea. I forgot all this back in elementary T_T. Yes. Negative integers are also ...
*Friday, June 16, 2006 at 11:14pm*

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