Questions Asked on
January 9, 2007

  1. ap chemistry!! help!!

    some solutes have large heats of solution, and care should be taken in preparing solutions of these substances. The heat evolved when sodium hydroxide dissolves is 44.5 KJ/mol. What is the final temperature of the water, originally at 20.0 degrees Celcius.

    asked by john
  2. geometry

    what geometric concept is modeled by the beam of a flashlight? what geometric concept is modeled by the beam of a flashlight 5

    asked by Amanda
  3. chemistry

    9. using bond energies, estimate the change in Hr for the following reaction. 2NO + O2--->2NO2 A 1624 kJ B -247kJ C 661 kJ D 54kJ 10. using bond energies estimate the change Hr for the follwing reaction C + 1/2O2 +1/2 N--->O=C=N a -611kJ b 109kJ c 2770kJ d

    asked by NATIE
  4. social studies help plz!!!!!!!!!!!!!!

    im doin a s.s project on christopher columbus's voyage and its kinda hard finding information!! can u give me any helpful websites?? This web site has a lot of good information about Columbus's voyages.

    asked by Crystal
  5. Chemistry

    What is the strongest of the intermolecular forces http://wine1.sb.fsu.edu/chm1045/notes/Forces/intermol/Forces02.htm The strongest is electrostatic forces between ions. But I don't call electrostatic forces between ions "intermolecular forces." They are

    asked by Bryan
  6. Chemistry Check if its right XD

    Ok here is the problem but i only need help on part a XD i think i did it wrong..so can you check my work? and tell me where i made the mistake? The space shuttle uses aluminum metal and ammonium perchlorate, NH4ClO4, in tis reusable booster rocket. The

    asked by becky
  7. Science

    What physical quantity will all observers always find the same value for?

    asked by Lisa
  8. English

    Does anybody know the author to the poem The Tide Risen the Tide Falls? by: Henry Wadsworth Longfellow

    asked by Ron
  9. social studies

    explain how the agricultural revolution led to the establishment of perment settlements The first agricultural revolution, also called the Neolithic Revolution, occurred as long as 25,000 years ago. However, most people consider the agricultural revolution

    asked by jasmine
  10. Chemical Compounds

    How can a flow chart help you to name chemical compounds? Some people like to memorize rules and use the analysis of compounds then to apply the rules. CAN YOU HELP ME!!

    asked by Devon
  11. ap chem

    There are several oxides of nitrogen; among the most common are N2O, NO, and NO2. 1.Write the Lewis structures for each of these molecules. In each case the oxygens are terminal atoms. 2. Which of these molecules "violate" the octet rule? 3. Draw resonance

    asked by Justyna
  12. Chemistry

    what particles are free to drift in metals? cations, electrons, neutrons, or protons? and what is the SI unit of mass? is it kilogram kg is correct for the SI unit of mass. Electrons conduct electricity; therefore, the electrons must be free to move in

    asked by Bryan
  13. AP Chem

    use simple structure and bonding models to account for each of the following: A. the bond length between the two carbon atoms is shorter in C2h4 then in c2h6. B.the bond lengths in SO3 are all identical and are shorter than a sufur oxygen single bond. C.

    asked by Justyna
  14. chemistry

    Here is a reaction: 2Al+3H2SO4--->Al2(SO4)+3H2 determine the oxidation numbers of each element in both the rectants and the products of this oxidation reduction reaction of aluminum and sulfuric acid? Which element is oxidized in this reaction? Which

    asked by chrissy
  15. Social Studies Plz help...

    what is the Glorious Revolution? thank you for your help!! http://en.wikipedia.org/wiki/Glorious_Revolution Im doing a report on ancient africa for language arts its going to be counted as two grade social study and language arts help The Revolution of

    asked by Rose
  16. math

    Mrs. Diaz wishes to save at least $1500 in 12 months. If she save $300 during the first 4 months, what is the least possible average amount that she must save in each of the remaining 8 months? After 4 months, 4 x 300 = $1200 will be saved. That leaves

    asked by irina
  17. global studies

    wat political "sub-units" make up the UK? The official name of the UK is the United Kingdom of Great Britain and Northern Ireland. Great Britain's sub-units are England, Scotland, and Wales. These entitities are further broken down into counties, buroughs,

    asked by michelle
  18. science(chem)

    Calculate the binding energy per nucleon for the following nuclei: a: 12C(nuclear mass, 11.996708 amu) 6 ------- b. ^37Cl(nuclear mass, 36.956576) i'm confused on how to solve and if theres a specific formula for this... please help thank you add the

    asked by Jina
  19. CHEMISTRY

    the hindenburg was a hydrogen -filled dirigiable that exploded on 1937. The Hindenburg held 6.5*10^5 L of hydrogen gas at 23C and 760mmHg, what mass of hydrogen (H2) was present? calculate n in PV=nRT mass=n*molmassH2

    asked by TIFFANY
  20. Language Arts

    Is her a noun? Is cat a person, place or thing? Isn't her a pronoun? Either a possessive or personal pronoun? A cat is a thing, the word cat is indeed a noun. Your dictionary can be a big help on these words... yes and thing A cat is a thing her is a

    asked by Quin
  21. math

    what makes the use of variables diffcult to understand? what makes them difficult to understand is : Depending on which variables are used somehow they have to predict just how they vary, and what factors influence the variation this is what i got helped

    asked by jordan
  22. Chem

    what does an -ite or -ate ending in a polyatomic ion mean? i'm thinking it mean Oxygen is in the formula, or is it Sulfur is in the formula? i'm not sure oxygen is in both ites and ates. The ate has more oxygen than ite. NaClO2 sodium chlorite NaClO3

    asked by Dennis
  23. Accounting

    1. The company uses a job-order costing system. How would you recommend that manufacturing overhead cost be assigned to production? 2. Recompute the company's unit product costs in accordance with your recommendations in (1) above. Direct

    asked by Chris
  24. algebra 2

    Factor completely with respect to the integers. 1. 9x^2 - 4 2. x^3 + 64 3. 200x^2 - 50 4. 8x^3 - 64 5. x^3 + x^2 + x + 1 6. x^3 - 2x^2 + 4x - 8 7. 2x^3 + 4x^2 + 4x + 8 8. 2x^3 + 3x^2 -32x - 48 9. 7x^3 + 14x^2 + 7x 10. 6x^3 - 18x^2 - 2x +6 11. 3x^4 - 300x^2

    asked by anonymous
  25. Algebra

    The area of a square garden in square feet is 49x^2-14x+1. Find the dimensions of the garden in terms of x. FActor the quadratic:(7x-1)^2 Gee, a square. the dimensions are 7x-1 on each side. FActor the quadratic:(7x-1)^2 the dimensions are 7x-1 on each

    asked by bailey
  26. Social Studies...Help plz

    Can you find me a website about Triangle Trade Route. (New England) Thanks a lot to who ever helps me out!! =] http://asterix.ednet.lsu.edu/~kfossey/4507/lesson3/cenac/group4.html THANKSSSSSSS Some New England trading ships followed the triangular trade

    asked by Stephanie
  27. General

    How come when someone asks a question others cant look at their question... all i see is the name of the person the subject and teacher of that subject!:( I tried to click on it to see the question and poof!!!! NOTHING btw wheres my question We can see

    asked by Justine
  28. algebra-Plz help

    Posted by bailey on Monday, January 8, 2007 at 8:32pm. Posted by bailey on Monday, January 8, 2007 at 2:12pm. The area of a rectangular blanket in square centimetersis 40x^2+2x-65. The width is 4x-5cm^2. Find the dimensions of the blanket in terms of x.

    asked by bailey
  29. Math - Algebra

    A. Solve the following quadratic equations. Make sure to show all your work. Do not use any method (e.g. factoring, completing the square, quadratic formula, graphing) more than twice. Use the graphing method at least once. 1. 3x+2 + 11x -20 =0 2. x2 + 3x

    asked by Angela Again!
  30. Pattern

    Can someone help me find the pattern and the next 3 numbers in the pattern? 10,1,6,6,11 I would think the next numbers would be 2, 7, 7, 12 But why? The difference between 10 and 1 is 9. The difference between 1 and 6 is 5. So , if you restart the pattern

    asked by Kim
  31. Biology

    1. How many base pairs are in a full turn or twist of a DNA molecule? 2. Name the complementary base pairs on DNA. A-T; G-C are the pairs, you name them. there are 10 1/2 base pairs for a full twist in DNA How does the nucleotide sequence in one chain of

    asked by Becky
  32. Science

    The potential energy of a golf ball in a hole is negative with respect to the ground. Under what circumtansces (if any) is the ball's kinetic energy? Its rest energy? The KE cannot be negative, nor can the rest energy be negative.

    asked by Lacy
  33. Help

    does anyone know anything about bieng a lawyer? yes i am one the debate team does that count in a way...do u live in new york? becuz there is a debate between different schools in columbia universty. im on the debate team too..but dat doesnt mean

    asked by annaiiz
  34. math,correction

    can someone correct this for me. 7(x –3) > 5x - 14 7x –21 > 5x –14 -5x -5x 1x –21 > -14 +21 +21 1x > 7 1x / 1 > 7 / 1 x > 7 the line has an open circle right on number 7 with an arrow going to the positive side. No. WHen you subtraced 5x from 7x,

    asked by jasmine20
  35. Biology help..!

    How does the nucleotide sequence in one chain of DNA compare with the other chain of DNA? The are complementary. How does the nucleotide sequence in one chain of DNA compare with the other chain of DNA?

    asked by Becky
  36. CHEMISTRY QUESTION

    Imagine you have a light bulb and battery conductivity tester. You are given a dilute solution of copper sulfate and a dilute solution of vinegar, acetic acid. Coppersulfate is an ionic compound. You may recall acetic acid reacts with water to produce ions

    asked by ALISHA
  37. Science/Chemistry

    Is this true Dispersion forces generally increase in strength as the number of electrons in a molecule increases. The number of electrons can only increase if more atoms are added to the molecule. The molecule has to stay electrically neutral. Dispersion

    asked by Jeff
  38. Math HURRY !!!!!!!!

    These 3 questions are very confusing can some plz tell me how to solve them 1) What percent of 9 is 4? 2) What percent of 25 is 10? 3) What percent of 40 is 12? THANKS FOR HELPING!!! 1)44% 2)40% 3)30% thanks but how did u get the answer did u multiply or

    asked by rebecca
  39. math... HURRY!!!

    i need help. i can't figure out the answers to these two problems. ~ 3n+100= ??? ~ 200n+32= 70059!!! HEEEELLLLLLLPPPPPP!!! thanks 200N+32=70059 MOVE 32 TO THE RIGHT AND MAKE IT NEGATIVE. 200N=70059-32 THEN SUBTRACT 70059-59=70027 THEN DIVIDE

    asked by Brianna Mae
  40. Help

    do u think homosexuals should be in the army? i think they should be in the army becuz they are people too (human beings). they shouldn't be left out the army becuz their sexuality but of what they can do to help the army? I think so. I don't believe that

    asked by Annaiiz
  41. math,correction

    can someone correct this for me please. Statistics. Sam must have an average of 70 or more in his summer course to obtain a grade of C. His first three test grades were 75,63, and 68. Write an inequality representing the score that Sam must get on the last

    asked by jasmine20
  42. Algebra

    the surface area of a sphere is a=4 pie r squared where r is the radius of the sphere. waht is the radius, rounded to the nearest tenth, of a ball with surface area equal to 85 square inches? below the question is A. 2.6 in. B 6.8 in. C. 2.7 in. D 6.7 in.

    asked by kati
  43. us gov't politics

    i'm doing a free response fro U.S government and politics and I am reading a graph where i have to describe a trend. one of the trend i noticed was that there was a decrease of ten percent of democrats in 1962-1964 of partisan identifications in US. I have

    asked by david
  44. spelling

    can someone please help me. this question is due tomorrow. question.......... #1 Can you figure out these phone messages? Rewrite each message as a complete sentence.................. a) No xtra seats aval. Meet btwn gate 7&8 @ 4p.m CU B4 the game. (That

    asked by krytstal
  45. Algebra 1.

    Factor: 50r^8 – 32r^2 The caret symbol represents a power. 2r^2(25r^6+16)= 2r2(25r6+16) DrBob222 forgot a minus sign: 50r^8 – 32r^2 = 2r^2(25r^6 - 16) Then, inside the brackets, you see a difference of two squares: 25r^6 - 16 = X^2 - Y^2 with X = 5 r^3

    asked by Elton
  46. english

    rearrange thes letters into one word Imbillie, you did not give us the letters... please repost.

    asked by imbillie
  47. poetry

    Who put the cat among the pigeons? Unfortunately we are unable to get hold of a copy of the book. Please can anyone help. put/set the cat among the pigeons (British & Australian) to do or say something that causes trouble and makes a lot of people angry or

    asked by dude
  48. 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

    asked by Natalie
  49. MATH

    what is a constant rate of change? That means the velocity changes over time in the same manner. 4,800 +3,700 =4,500 Rate of Change Is Constant You can increase or decrease the amount or concentration of a species by a constant value using a zero order

    asked by Austin
  50. french!

    for homework tonight we are to write a french poem about someone. i am doing it on my friend carly. does anyone have a french word that begins with the letter 'y'? haha i cant find anyword! (accept YOGA.) thanks! yeux bandes (with an accent on the e in

    asked by L.
  51. chemistry

    calculate the density of NO3 gas at 0.970mm Hg and 35C Take 1 liter. calculate n in PV=nRT then, density= mass/volume= (n*molmassNO3)/1liter. I STILL DON'T UNDERSTAND HOW TO DO IT COULD U PLEASE EXPLAIN What don't you understand about PV = nRT and how that

    asked by TIFFANY
  52. JUST HELP ME

    ok i have to write a constitution and i have everything i want on it but i need to know how to put it in constitutional form please help TAYLOR Graves Make an outline. THen in the outline organize it by function: executive legislative judicial

    asked by Taylor
  53. Science

    A wooden block is submerged in a tank of water and pressed down against the bottom of the tank so there is no water underneath it. The block is released. Will it rise to the surface or stay where it is? I think it will rise to the surface because of the

    asked by Kat
  54. math

    i have another question as well.. square root of 3x=x-6..thanks i got an answer that doesnt work out os if u could jus help me out on these thx :) I would square both sides first so you have 3x = x^2 - 12x + 36. Then subtract 3 on both sides so you have

    asked by joe
  55. Science

    What are the equivalents of 0 K, 0°C , and 0° F in the other temperature scales? Use the formulae below to calculate the scale you want. K = 273.16 + C F = 9/5*(C) + 32 C = (F-32)*5/9

    asked by Mae
  56. math

    I need to know the math factors of 15 15*1=15 5*3=15

    asked by kimberly
  57. social studies

    what are the advances of early culture groups in north america This question is FAR too broad. There were many, many groups of people (and therefore civilizations) that developed in what we now call North America. You'll need to decide on one or two groups

    asked by jasmine
  58. social studies

    how did native americans adapt to their environments This question is FAR too broad. There were many, many groups of people (and therefore civilizations) that developed in what we now call North America. You'll need to decide on one or two groups to

    asked by jasmine
  59. social studies

    what kind of civilization did mesoamerica develop I will be happy to critique your thinking on this.

    asked by jasmine
  60. Japanese

    I need someone to correct my translations... Can you please help :(... at least some, here they are: 1.

    asked by Cortney
  61. gov't help please

    why is getting access to a ballot an obstacle to cross for minority parties in order to win elections. i looked on the internet and read that they have to be nominated and stuff but how is it more harder for minority parties than it is on majority parties

    asked by david
  62. Moment/Physics

    I understand a moment is a weight being moved by a particular distance. Although I am unable to establish what weight by how far would make a moment. eg 1 pound by 1 inch 1 pound by 1 foot 1 ton by 1 foot 1 Kg by ??? Explanation please. Mike You do not

    asked by Mike
  63. Thermochemistry please

    I really need help on this problem... ===================== Hydrocarbon Formula Delta H (kj/mol) 1,3-Butadiene C4H6(g) 111.9 a) calculate the fuel value in kJ/g for this compound and determine the percentage of hydrogen by mass. I've tried it for hours yet

    asked by Jina
  64. 7th grade math

    what is the equivalent expressin of 7(5x) 35x ? 35x

    asked by Amber
  65. Science

    We are studying energy my questions What happens to the momentum of a car when it comes to a stop? The momentum is transfered to the Earth. Momentum is always conserved. What happens to the momentum of a car when it comes to a stop?

    asked by Mae
  66. math

    what percent of 25 is 10? please explain how to get the answer. 40% well how do uget the answer? i need to know okay say what percent of 25 is 10 you do 10 divided by 25 and it gives you the percentage of .4 which is 40% move the decimal over two places

    asked by Carina
  67. Physical Science

    How much work is needed to raise a 110-kg load of bricks 12 m above the ground to being under construction? work in joules= weight*height where weight is mass*9.8m/s^2

    asked by Tammy
  68. Science 11th grade

    In an ionic compound, what is the net ionic charge? and what compound does an -ide ending generally indicate?

    asked by Jeff
  69. chemistry

    155.0 grams of N2 (nitrogen gas) are put in a 4.50L container at 35C. What is the pressure? PV=nRT n=155/molmassN2 Convert temps to K.

    asked by TIFFANY
  70. Science

    Why do you think the Celsius temperature scale is sometimes call the centigrade scale? It is divided into 100 units from water freezing to water boiling.

    asked by Kim
  71. MARKETING!!

    PLEASE HELP ME MATCH THE FOLLOWING... 1.standard of living 2. economies of scale 3. division of labor. 4. gross domestic product 5. investment. 6. diminisihing returns 7. infrastructure. 8. production 9. productivity 10. technology. a. value of final goods

    asked by MARKETING HELP =]
  72. Science

    Why do tables of densities always include the temperature for which the listed values hold? because temperature causes things to expand or contract, changing its volume, so density changes.

    asked by Tindy
  73. Religion , edit.

    Can someone edit this for me or help me make it sound correctly or even better. I would greatly appreciate it. please....:) How did the childhood experiences of Siddhartha Guatama (Buddha) lead to his questioning of the spiritual practices of his time?

    asked by kailin
  74. math correction

    can someone correct this for me.Also do i have to solve it all the way or what does it mean by inequality form. Business and finance. The cost for a long-distance telephone call is $0.36 for the first minute and $0.21 for each additional minute or portion

    asked by jasmine20
  75. physical science

    describe your motio when you are on a swing in terms of kinetic and potetial energy. at which point during your motion is each type of energy the greatest Potential energy is hghest when the elevation is highest. Potential energy is lowest (and kinetic

    asked by allie
  76. Physical Science

    Most would expand, greater volume, lesser density. Density= mass/volume What would be true of the densities of most solids and liquids at a temperature higher than the quoted one?

    asked by bobpursley
  77. math

    what is the square root of 5z-2, then it says plus 7=10 First, subtract 7 from each side so you now have: sqrt(5z-2)=3. Then square each side, so you now have: 5z-2=9. Then add 2 to each side so you have 5z=11. Then divide each side by 5 and the answer is

    asked by joe
  78. Chemistry

    how many electrons does nitrogen gain in order to achieve a noble-gas electron configuration? is it 4? Nope, it's 3. Looking across period 2, you can see that Nitrogen has 5 valence electrons. It wants 8. 8-5=3. Thanxs. How many significant figures are in

    asked by Bryan
  79. math

    belinda if ur still here to help i would appreciate it so much but 5z-2 (5z-2 is under a radical sign) +7=10 anyone else who knows how to solve this with it coming out equal please help thanks again :) wow, I am SO incredibly stupid 3 times in a row! When

    asked by joe
  80. social studies

    how did asians migrtate to america http://www.time.com/time/classroom/glenfall2006/pdfs/who_were_the_first_americans.pdf http://www.mnh.si.edu/arctic/html/peopling_siberia.html Scroll down to From Siberia to the Americas

    asked by jasmine
  81. social studies

    what kind of civilivation did north america develop This question is FAR too broad. There were many, many groups of people (and therefore civilizations) that developed in what we now call North America. You'll need to decide on one or two groups to

    asked by jasmine
  82. social studies

    how did native americans adapt to their environment I will be happy to critique your thinking on this.

    asked by jasmine
  83. science

    The Earths Interior: "Ability of a solid to flow or change shape like a thick liquid." It is one word. The third letter is an (A)and it is 10 letters long. plasticity

    asked by Doug
  84. please help calculus

    find the volume of the solid formed by revolving the region bounded by y=e^x, y=0, x=o and x=1 about the y axis by using the shell method, i got v=2*pi int(o to 1) (x)(e^x) dx and my teacher said the answer is e/2 but i keep getting a different answer Are

    asked by david
  85. solving for x

    y=e^x how do i solve for x. i use the LN process right. i forgot how to do that ln(e ^ x) = x Leo, you have merely stated an identity. David was solving y = e^x for x, which would be x = ln y Thanks reiny.

    asked by david
  86. Chem

    What causes dispersion forces? Disperson forces are caused by an unsymettrical distribution of charge in the molecule, causing a net electric force. http://www.chem.purdue.edu/gchelp/liquids/disperse.html

    asked by Dennis
  87. Death Penalty

    Do you believe we should sentence children or handy-cap people to death? I think we should if they mean it what they've got guilty of. The problem is that many found guilty turn out to be not guilty. And many found "guilty" in fact were not culpable in the

    asked by Janet