Thursday

October 23, 2014

October 23, 2014

Total # Posts: 496

**Chemistry**

Calculate the change in the enthalpy of the reaction. C4H4(g)+2H2(g)===>C4H8(g) Use the following: change in enthalpy of combustion for: C4H4=-2341 kJ mol-1 H2=-286 kJ mol-1 C4H8=-2755 kJ mol-1
*October 25, 2009*

**physics**

Correct Answer: D — It increases by 15 joules. Explanation: The amount of work done by non-gravitational forces in moving an object from one position to another is equal to the change in the gravitational potential energy of the object. If 15 joules of work are done on ...
*October 22, 2009*

**physics**

What is the weight in newtons of a 250 g package of cereal? need answer and work shown asap! plz and thank u!
*September 2, 2009*

**accounting**

The balance in the unearned fees account before adjustment at the end of the year is 112,790. Of these fees, 69,735 have been earned. In addition, 13,200 of fees have been earned but have not been billed. Journalize the entry to the adjust the unearned fees account.
*September 1, 2009*

**4th grade**

name the seven continents of the world.
*August 25, 2009*

**English**

Sorry about not explaining it the first time. I put everything that I have towards conquering my goals that I set for myself and if I'm not able to reach a certain goal I know inside my heart that I haven't let myself down and that I will continue to strive to great ...
*June 13, 2009*

**English**

I'm not writing a scholarship or anything like that. We had to find two things like that on the internet and reword them because were doing commercials that have to do with the characteristics of college for a project. I'm only in 9th grade.
*June 13, 2009*

**English**

I can re-word these two seperate things. I found them on the internet but need to change the words. Any help would greatly be appreciated. "I believe that I deserve this scholarship because I put so much effort into every task that I am given. I give only my best, and see...
*June 13, 2009*

**Geography**

Country:the people who live in a nation or country City:a large and densely populated urban area
*June 10, 2009*

**capitalization**

Correct
*June 1, 2009*

**World Geo.**

3. The Testimony of Faith, prayer, giving Zakat(support of the needy),Fasting the month of Ramadan,The Pilgrimage to Makkah 5. Horn of Africa
*May 29, 2009*

**language arts**

spinach broccoli bean sprout turnip rhubarb radish
*May 29, 2009*

**science assignment**

This is question that I feel that you can answer on your own. View it on how it has changed our society and the types and uses of technology that people now have available to them. Everyone has their own opinions towards this
*May 25, 2009*

**Child Growth & Development**

Do you know of any websites that would help me with this following question. Describe three or more differences between genders during teenage years? Regarding physical/ emotional differences. Thank you for your help
*May 6, 2009*

**algebra**

Factor : (4x^2-7x+3) - (3x^2-5x)
*May 1, 2009*

**geometry**

Lol, okay. Thank you very much !
*April 26, 2009*

**geometry**

If the area of Triangle T, sides 5,12, and 13 equals the area of rectangle R, width 3, then what is the perimeter of rectangle R?
*April 26, 2009*

**Latin**

Well what does "pacem" mean?
*April 26, 2009*

**Latin**

What does Ex Pacem mean?
*April 26, 2009*

**geometry**

Thank you !
*April 26, 2009*

**geometry**

Find the area of a rectangle that has a diagnol of 13 cm and a height of 5 cm.
*April 26, 2009*

**English**

Not in Comfortable, but in Fashionable, you don't say the "i". So, instead think of it as Fashonable.
*April 26, 2009*

**5TH GRADE MATH**

a blank is abuot the size of a sports drink bottle it contains 1,000 milliliters
*March 19, 2009*

**Math pizzazz worksheet answers**

Can anyone help me with math w/ pizzazz middle school d- 58??????
*March 8, 2009*

**chemistry**

I need help Calculating the mass of HCL neede to react with 20.0 grams Zn. Zn+HCL -> ZnCl2+H2
*February 9, 2009*

**chemistry**

This is a combustion reaction of a hydrocarbon, so the product should be CO2 and H2O, which is how you correctly solved the problem, but you say the product is CO and water. If this is the case, the coefficients in the balanced chemical reaction would be 2,7,6,8. Making the ...
*January 22, 2009*

**english**

wordy is the answer
*January 19, 2009*

**English**

i have the same questions
*January 19, 2009*

**math**

about 88 of every 100 people in america eat turkey onn thanksgiving. ther are about 300 million people in america, About how many of them eat turkey each thanksgiving.
*November 8, 2008*

**college**

Please help me write a discussion on the 3 market shifts in the fashion industry
*October 27, 2008*

**arithmetic**

What is 67 5/8 x 6?
*October 24, 2008*

**Math**

Jill and Matt run on a 400-meter-long oval track. They each run 10 laps daily and both run in the same lane. One day, they begin at the same point, but ran in opposite directions. Jill ran at a constant speed that was 2 meters per second faster than Matt's constant speed. ...
*October 22, 2008*

**algebra equations**

i need help solving the following: 10h = 8h + 6 and 6x + 2 = 3x - 1
*October 21, 2008*

**12th grade**

If f(x)= 1/1-x Find the composition of f(f(x)). So I get 1/1-(1/1-x) I'm not sure if I am putting it in my calculator correctly because I keep getting a line. Is that right? If I put it in with the parentheses differently, I get the graph of f(x)=1/x. Does anyone know ...
*September 18, 2008*

**Calculus**

If f(x)= 1/1-x Find the composition of f(f(x)). So I get 1/1-(1/1-x) I'm not sure if I am putting it in my calculator correctly because I keep getting a line. Is that right? If I put it in with the parentheses differently, I get the graph of f(x)=1/x. Does anyone know ...
*September 18, 2008*

**MATH**

I need help ASAP. A firm produces its output in two plants, A and B.a. To maximize its profit, the firm should produce the output at which ______ equals ______. It sets the price given by ______. b. It should allocate this output between the two plants so that ______ equals ...
*September 4, 2008*

**economics**

I can't seem to answer these questions
*September 3, 2008*

**economics**

Can someone assist me with these two questions. Thanks A perfectly competitive firm's demand is ____________ elastic and equal to ____________ which is equal to ____________. A firm is allocating 16 hours a day on its assembly line to producing goods A and B, 12 hours to A...
*September 3, 2008*

**Ethnic Diversity**

I am in Axia as well and this class has definitely been rough on me so I am glad I found the help here! thanks!
*September 2, 2008*

**algebra**

Rectangle R is formed by joining the centers of two congruent tangent circles and then drawing radii perpendicular to a common external tangent. If the perimeter of R is 60, what is its area?
*August 27, 2008*

**economics**

You are planning to estimate a short-run production function for your firm, and you have collected the following data on labor usage and output: Labor usage Output 3 1 7 2 9 3 11 5 17 8 17 10 20 15 24 18 26 22 28 21 30 23 Does a cubic equation appear to be suitable ...
*August 18, 2008*

**economics**

You are planning to estimate a short-run production function for your firm, and you have collected the following data on labor usage and output: Labor usage Output 3 1 7 2 9 3 11 5 17 8 17 10 20 15 24 18 26 22 28 21 30 23 Does a cubic equation appear to be suitable ...
*August 18, 2008*

**whoops, correction**

Thank you.
*June 14, 2008*

**math**

I am trying to solve a problem using Newton's equation, which is (-1/2)(9.8)t^2+ vot+ h. The problem says that a car rolls of a 120 foot high cliff. I know how to right the equation for this problem which would be (-1/2)(9.8 m/s) t^2 + vot + 37m. I am trying to find out ...
*June 14, 2008*

**French**

Is there a French word for "a facial" like the treatment of the face. I'm trying to use it in my paragraph and I can't find the word for it.
*June 8, 2008*

**French**

Can someone check my work? I'm trying to say: "He was at the zoo and a lion jumped out of the cage and attacked him." This is my attempt. Could you please fix any mistakes? "Il était au zoo et un lion a sauté de la cage et l'attaqué...
*June 6, 2008*

**chemistry**

how many moles are in Fe2O3
*May 21, 2008*

**5TH GRADE MATH NEED HELP ASAP**

i need help with customary units of weight and capacity
*April 22, 2008*

**Precalc**

A boat that travels at 16 knots in calm water is sailing across a current of 3 knots on a river 250 m wide. The boat makes an angle of 35 degrees with the current heading into the current. Find the resultant velocity of the boat. How far upstream is the boat when it reaches ...
*April 11, 2008*

**History**

"What position would you take on appeasement if you had been living in Canada during the 1930's and had heard about Adolf Hitler and the Nazis? Explain why" Hi, could you please help me by giving me some sort of direction on what i should do, i am not sure if i ...
*March 30, 2008*

**Spanish**

How do you say, How was your trip?, in spanish?
*March 24, 2008*

**Brain Teaser**

What is the answer for this visual brain teaser? ii 00 00 00 00
*March 19, 2008*

**math**

I have a question about Exponential Growth. The problem is: You deposit $350 in an account that pays 9.5% interest compounded yearly. What is the balance after 6 years? I don't know how to write the equation for this. Does anyone have an idea what the equation might be?
*March 6, 2008*

**Geography**

I've been searching all over the web for this, but cannot find specific details. How did the former Soviet Union encourage its expansive population policy? Thanks in advance.
*March 1, 2008*

**Grammar**

“Well,” Alex smiled into the phone. “I just realized that it was near three and that I wouldn’t get enough sleep and might forget to call you." Because 'Alex smiled into the phone' is description instead of attribution, should there be a period...
*January 30, 2008*

**biology: the study of life**

2. what is meant by the statement "living things do not exist in isolation"? TRUE/FALSE 3.people study biology only if they are planning to become biologists. 4. by studying biology you can better appreciate the great diversity of species on earth and the way each ...
*January 27, 2008*

**Latin**

That's what the chapter was about, though. Pluperfect and future perfect I mean. I'm just seriously stuck because my translations don't fit into the blanks on my worksheet.
*January 17, 2008*

**Latin**

I need some help with pluperfect/future perfect translations. I shall meet You (singular) will arrive You (plural) will leave They will carry They will put on I can't figure them out for the life of me! Thanks, Natalie
*January 17, 2008*

**Social Studies**

between j.p. morgan, john d. rockefeller, cornelius vanderbilt, and andrew carnegie, who's business is a example of horizontal integration
*December 16, 2007*

**Math**

What is the real value of x in the equation log(subscript 2)24-log(subscript 2)3=log(subscript 5)x? I really cannot remember at all how logs work. I know the answer is 125 but have no idea how to get there. Thanks in advance.
*November 17, 2007*

**social studies**

Why is the loyalist mad at the patriots?
*October 20, 2007*

**Pre-Calc**

Could somebody please check this for me? Dtermine whether the graph of each equation is symmetric with respect to the origin, the x-axis, the y-axis, and the line y=x or the line y=-x. I came up with the line being symmetric to the x-axis, the y-axis, and the line y=x. I'm...
*October 8, 2007*

**Physics**

In the air: Vi=0, d=15m, a=9.8m/s^2, vf=? vf^2=vi^2+2ad vf^2=0^2+2*9.8*15 vf=17.15m/s --> speed when hitting the water Now for the water part: vi=17.15m/s, vf=0,d=2,a=? vf^2=vi^2+2ad 0^2=17.15^2+2*a*2 a=-73.5 m/s^2 F=ma F=56*73.5=4116 N
*September 19, 2007*

**Science**

Thank You!:)
*September 16, 2007*

**Science**

How do you find the density of a cyclinder if you are only given the diameter, height and mass?
*September 16, 2007*

**digit numbers**

omar has 318 marblesrounded to the nearest hundred how many marbles does omar have?
*September 6, 2007*

**English**

In high school we have to read great expectations by Charles Dickens for honors English but i do not understand the essay I have to write. Could someone help me please? Compare and contrast the ways in which the protagonist is stuck between two worlds, discuss what they ...
*September 1, 2007*

**statistics**

Can someone help me with this questions. Find the variance for a given data. Rpund your answer to one more decimal place then the original data. Compute the variance. Jeanne is currently taking college zoology. The instructor often gives quizzes. On the past five quizzes, ...
*August 28, 2007*

**staistics**

Can someone assist me in answering this question. Use the given values of n and p to find the mimimum usual value of u-2standard deviations and the maximum ususual values u+20. n-186, p=0.13
*August 5, 2007*

**statistics**

Can someone assist me in answering this question. Use the given values of n and p to find the mimimum usual value of u-2standard deviations and the maximum ususual values u+20. n-186, p=0.13
*August 4, 2007*

**Shakespeare!**

Could someone help me understand something Hamlet says to Polonius? For the satirical rogue says here that old men have gray beards, that their faces are wrinkled, their eyes purging thick amber and plum-tree gum, and that they 190 have a plentiful lack of wit, together with ...
*June 28, 2007*

** Intro. to Computers**

Can you help with these 2 questions? 1. The law firm you work at regularly scans documents into the computer system. They now want to be able to edit the digital image copies of those documents. Which do they need to accomplish this? (A) Optical character recognition software ...
*June 13, 2007*

**geography**

i need help on writing a diomante poem A diamante poem? http://www.readwritethink.org/materials/diamante/ http://www.franklinlakes.k12.nj.us/famsweb/curriculum/English/diamantepoems/diamante.html http://teams.lacoe.edu/documentation/classrooms/amy/algebra/5-6/activities/poetry...
*May 28, 2007*

**Grammar**

I don't understand predicates. What are they and how do I figure out what is the predicate in a sentence? The predicate is simply the main verb and all that modifies or describes it. He raced home as fast as he could. He = subject raced = main verb raced home as fast as he...
*May 24, 2007*

**Chemistry**

is there an equation to find mass percent....if know concentration and and final and initial volume of a titration lab? there isnt one then how do you find mass percent? M x L = mols of titrant. From the equation, convert to mols of unknown. Mols of unknown x molar mass = ...
*May 7, 2007*

**chem**

plz help If you carefully place a steel razor blade flat on the surface of water, the razor blade can be made to float. Explain this result, given that the density of steel is much greater than that of water. I'm not really sure what the answer is. I think it has something...
*April 18, 2007*

**Math--Area**

Find the area of each regular polygon to the nearest tenth. Octagon with side length of 10 kilometers. Heres what I tried; but I don't know if im on the right track. Area=1/2 * Perimeter* Apothem Perimeter=base of octagon* number of sides Perimeter=10*8=80 km. SO A=40a (1/...
*April 4, 2007*

**explicit formula**

YO MAMA.
*April 3, 2007*

**math proportions**

dont know i am so dum at math
*February 25, 2007*

**Algebra**

Rationalize the denominator. Assume that all variables are positive. 5x^4y/2x^2y^3 There are square root signs around both parts of the fraction, but I cannot make them on the computer. Thanks in advance. are u using the carrot symbols to mean to the power of...? Yes Come on, ...
*February 24, 2007*

**Algebra2- Inverses**

The Law of Gravitation is represented by the formula Fg=G(m1m2/r2) What would be the inverse of this function Fg-1? What would this force represent? Can someone plz hurry and answer this for me
*January 9, 2007*

**Algebra Functions**

I cannot for the life of me remember how to do this- Find the vertex of the graphs of the functions: Function #1: y=(x-4)(x+2) AND Function #2: y=2x^2-4x+1 Can someone help me get it PLz! OK - to find the vertex of these functions you must have them in quadratic form where the...
*January 4, 2007*

**ART**

For an art project, I have to try and find an artist(preferably famous- so that i can find information on him/her)that draws/paints buildings. As i am having trouble finding one. Thank you if you can help! Thank you for using the Jiskha Homework Help Forum. This is an ...
*December 4, 2006*

**chemistry 12**

sry, a misprint. its: O2+2F2 <--> 2OF2 The question is looking for Kc. 2.50 mo of oxygen and 2.50 mol of fluorine gas are placed in a 2.00L glass container at room temperature. The container is heated to 400K and the following equilbirum is established: O2+2F2 <-->...
*November 20, 2006*

**history**

im reading the book kinf arthur i need help! who did launcelot marry? You can find that at the following site: http://en.wikipedia.org/wiki/Lancelot
*November 13, 2006*

**Slope Form!!**

2x + y = 9 *You need to put it into slope form and solve for x and y!PLz help! y= -2x + 9 -2,intercept: -7
*November 5, 2006*

**Physics**

26.7
*September 19, 2006*

**Algebra**

Can someone please help me with these algebra problems? The directions are: Solve the equation or formula for the indicated variable. m=ax+bx for x 8=mx+ax-2 for x ax+bx-3=4 for x Anything is helpful! Thanks. For m=ax+bx for x you would use the distributive property to get m=(...
*September 10, 2006*

**Home Economics**

List 5 careers that are possible from 3 areas in Home Economics. Why don't you list the areas of Home Economics first, then match those areas up with careers. I can think of cooking, sewing, (by the way, most Home Ec departments now prefer to be called Family and Consumer ...
*September 8, 2006*

**Math**

Your Aunt will give your $1,ooo if you invest it for 10 years in an account that pays 20% interest compounded annually. That is, at the end end of each year your interest will be added to your account and invested at 20%. What will your account be worth at the end of 10 years...
*August 30, 2006*

**Math**

Your Aunt will give your $1,ooo if you invest it for 10 years in an account that pays 20% interest compounded annually. That is, at the end end of each year your interest will be added to your account and invested at 20%. What will your account be worth at the end of 10 years...
*August 28, 2006*

**Math**

A goblin miner earns 1 cent the first day, 2 cents the second day, 4 cents the third day, 8 cents the fourth day. How much will the miner earn in 30 days? Ok--I know to double the answer each time until 30--which would be:5,368,709.12 Is there an equation to make this easier? ...
*August 21, 2006*

**Math**

Fay's rubber ball bounces exactly half the height from which it is dropped. She drops the ball from the top of a building that is 64 meters tall. How high will the ball bounce on its eighth bounce. Could someone explain this? Thank you! Natalie 1/2 of 64= 32. 32 feet is ...
*August 16, 2006*

**chem question**

This is on a practise exam I have and I cant get part of it, I don't know if it is not only due to my not understanding but to the fact that the first two parts might be wrong. Thanks for your help if you can. Heres the question: A coffee-cup calorimeter normally consists ...
*June 20, 2006*

**Physics for exam**

I can't get this question and its been driving me crazy. I need to know how to do this for my exam. Any help would be appreciated. A golfer is practising his/her swing at a distance of 150m from a house. On the way back to the ground, 5.00 seconds after being hit, the ball...
*June 19, 2006*

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