Questions Asked on
June 6, 2009

  1. Chemistry

    4Al + 3O2->2Al2O3(triangle)H= -1669kj/mol 2Fe + O2 ->2FeO (triangle)H= -822 kj/mol Determine enthalpy change?

    asked by Edna
  2. Physics and Chemistry

    What chemical phenomenon accounts for the elasticity seen in solids? covalent bond hydrogen bond ionic bond all of the above.

    asked by Taylor
  3. home economics.

    state the general rules for storing clothes

    asked by Kavita
  4. Algebra

    Identify the vertex and the axis of symmetry for the graph of y=5(x-2)^2 + 3. a) vertex (2,3); x = -2 b) vertex (-2,-3); x = 2 c) vertex (2,3); x = 2 d) vertex (-2,-3); x = -2 I have no idea how to solve this problem! Please help. Thank you! :)

    asked by Cassie
  5. History

    I need to find a little more information about the differences between the North and South where it concerns the political and economic situation. Here is what I have: Policital, the North had an oppresive government. The South , the government, was

    asked by B.B.
  6. teaching math

    Indicate whether the deductive reasoning used is an example of affirming the hypothesis or denying the conclusion. If a number is divisible by 3, then the sum of the digits of that number is divisible by 3. The sum of the digits of a number is not

    asked by barbara
  7. critical thinking

    1) It is an article of faith among some economists that the significant inventions of the contemporary world are the results of the innovative genius of big business organizations. (2) Yet in the United States, the current trend toward corporate mergers

    asked by mary
  8. chemistry

    What is an example of a specific mixture that could be separated with simple distillation and a specific mixture for which only fractional distillation would be used? I think a methanol-water mixture could be done with simple distillation, since they have

    asked by jerry
  9. Algebra

    Use the quadratic formula to solve the equation. Give exact answers. 2x^2 + 11x - 21 = 0 a) -3/2, 7 b) 3/2, -7 c) 3/2, 7 d) -3/2, -7 I could not get any of these answers.

    asked by Cassie
  10. HUMAN RESOURCE PRINCIPLES AND PRACTICES IN HEALTH

    Discuss the regulatory environment in which health care organizations operate in today's environment. Discuss the difference between the roles of HR management and Top management in regard to responsibility to assure compliance with laws and regulations

    asked by Anonymous
  11. maths

    A paving block is is in the shape of a prism, the area of it' cross section being 154cm^2.The prism i 17cm long ad the material from whih it is made has a density of 2.2g/cm^3. Calculate the mass of the paving block. Please can you tell me the method

    asked by chelsea
  12. Physics

    longitudinal waves ->move in the ____________as the medium movement. transverse waves-> move____________to the medium movement. Waves transfer_______ without transfering_____

    asked by Tara
  13. earth science

    what is the greatest danger from volcanoes?? a. watery lava b. mud flows c. oxygen d. bulging of the earth's crust

    asked by matt
  14. Algebra

    Which is the equation in standard form of the line that is perpendicular to 6x-8y=2 and contains (-1,4)? a) x - 4y = -17 b) 4x + 3y = 8 c) 3x + 4y = 13 d) 4x - 3y = -16 Please explain how to do this problem. Thanks! :)

    asked by Cassie
  15. crt

    For some philosophers, writing is an unfortunate necessity, a means of communication that is at best irrelevant to the philosophical thought it expresses and at worst a barrier to that thought. The words in which the philosophical investigator writes up

    asked by Lucy
  16. teaching math

    Indicate whether the deductive reasoning used is an example of affirming the hypothesis or denying the conclusion. If a number is divisible by 3, then the sum of the digits of that number is divisible by 3. The sum of the digits of a number is not

    asked by barbara
  17. Critical Thinking

    Over time, non-specialists are usually able to assimilate radically new scientific ideas, even though these ideas may seem strange when they are initially introduced. Such was the case with Newtonian physics; when Newton proposed his ideas regarding motion

    asked by mary
  18. science

    If air at sea level with a temperature of 27degrees C is forced up a mountain slope and the air's dew point at the condensation level is 14degrees C, at what elevation will condensation begin?

    asked by Jill
  19. History

    I need to find a little more information between the similarities between the North and South where it consists of political and economic. Here is what I have: Political they the white men ruled the government. Economic: Farms for living, had livestock. Is

    asked by B.B.
  20. spanish

    "Que te gusta mas de las peliculas de accion?" "Me gustan mas _____." a. los huracanes b. los locutores c. los anuncios d. los efectos especiales D--the special effects (sorry for the missing accent marks)

    asked by y912f
  21. spanish

    Los _____ generalmente tienen que saber hablar bien. a. locutores b. guiones c. argumentos d. derrumbes A--announcers

    asked by y912f
  22. tissue engineering

    in tissue engineering, why are fibrous fabrics or polymers important? I know that some have slow degradation and some polymers can be controlled in certain conditions, but I want more detail.

    asked by Anonymous
  23. Algebra

    This question was just some random one on a math sheet. There were no directions, and I"m not sure what to do. 5(x-3)=? Thanks!

    asked by Student
  24. histidine basic/nonbasic nitrogens

    For the amino acid histidine, the nitrogen with the H attached to it is not basic (since you can draw out the resonance for it). But the other nitrogen that has a double bond is not basic. Why is this?? I can draw out the resonance for the double bonded

    asked by Kim
  25. Math

    I just have a quick question regarding this question: Simplify. State any restrictions on the variables. log(x^2+7x+12)-log(x^2-9) my answer is log[(x+4)/(x-3)] which is correct. However, for the restrictions, I believe that they are: x>3 and x3. When I

    asked by Christine
  26. Math/Economics

    A zero-coupon bond matures for $1,000 in exactly 12 years' time. If you paid $385.63 today for the bond, what average yearly rate of return will you earn?

    asked by C.J.
  27. english

    which one is correct Please send an invitation to Bob and she or Please send an invitation to Bob and her.

    asked by sandra m
  28. math

    Indicate whether the deductive reasoning used is an example of affirming the hypothesis or denying the conclusion. 8 If a number is divisible by 3, then the sum of the digits of that number is divisible by 3. The sum of the digits of a number is not

    asked by heatherly
  29. science

    is the Paricutin volcano in mexico still active??

    asked by bo
  30. Algebra

    Use the formula C=2pi to find the radius, r, for a circle with a circumference of 160 centimeters. Round your answer to the nearest hundredth. a) 50.96 cm b) 28.08 cm c) 25.48 cm d) 80.00 cm When I tried to solve this problem, I never got any of these

    asked by Cassie
  31. Critical Thinking

    In 1976 a powerful earthquake hit the city of Tangshan, China. Scientists had failed to predict the earthquake. If people had paid attention to the unusual animal behavior that preceded the earthquake, however, they would have known it was coming. Animals

    asked by mary
  32. home economics

    reasons for storing clothes in the home

    asked by Kavita
  33. spanish

    "Que dijeron Uds. despues de escuchar el comentario sobre la pelicula nueva?" "_____ que el locutor tenia razon." a. dijimos b. decimos c. deciamos d. dijeron can you please explain the meaning of the quesiton and each answer choice. thanks a lot Jiskha

    asked by y912f
  34. spanish

    "Te gusta mucho actuar, verdad?" "Claro que si! Quisiera hacer _____ en un programa de television." a. los efectos especiales b. el papel principal c. el director d. el guion B-- main part

    asked by y912f
  35. spanish

    Los actores usan _____ para aprender su papel a. un guion b. un director c. una escena d. unos efectos especiales A--script

    asked by y912f
  36. spanish

    "Quieres ver las noticias locales esta noche?" "No. Prefiero ver las _____ para recibir informacion sobre los que pasa en otros paises. a. principales b. basadas c. excelentes d. internacionales can you please explain the meaning of the question

    asked by y912f
  37. Math Statistics

    An investigational drug study is being conducted. The initial screening phase needs to include enough people so that the final (approved) group has at least 10 patients. The probability of a person being approved for the study is .80. what initial sample

    asked by Craig
  38. Algebra

    Solve by factoring: x^2+2x+4x+8=0 Thank you!

    asked by Student
  39. Latin

    Is the imperative for -ere verbs like docere doce? Thanks.

    asked by Lyla
  40. Literature quick question

    Can someone help me or give me a link to where I can find chapter summaries, or book notes for the story You Don't Know Me by David Klass. Thanks

    asked by Rita
  41. chemistry

    what ionic compounds could you form from the following? Sodium Calcium Neon Phosphorus Chlorine i have NaCl, CaCl2, Na3P, and Ca3P2 is that all and can neon be used?

    asked by lyne
  42. ecology

    I am not very good in science, and math. However, I do very well in english, writing, puncuation, and grammar. Here is my question. Do you believe humans can harvest forest resources in an enviromentally friendly way? Or, should national forest be left in

    asked by Kate
  43. math

    Indicate whether the sequence is arithmetic, geometric, or neither. 6, 30, 150, 750, 3750, . . .

    asked by heatherly
  44. Unknown

    Can someone please help me with crt 205 week 5 assignment ( Identify Fallacies) i have been working on this for hours in now will be late posting it for feed back and i will loose points SO PLEASE HELP ME i will glady appreciate the tips

    asked by Jove
  45. commercial

    prepare a trial balance for sonia in the year of 2000 and the total amount of 21540 dollars

    asked by shiekha
  46. History

    I need some help and keep finding other things. What political similarities was present with the Early Northern and Southern Colonies? Thanks.

    asked by B.B.
  47. History

    Was the Early Northern Protestants or Puritans? I have read conflicting articles on this. Thanks.

    asked by B.B.
  48. science

    which of the following is formed from molten rock that contains large amounts of gasses?? A: Rhyolite B: granite C:basalt D: pumice

    asked by rob
  49. critical thinking

    The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost

    asked by mary
  50. American Government

    What is double security?

    asked by Anonymous
  51. critical thinking

    The great French historian Jules Michelet (1798-1874) sympathized with the French Middle Ages and with the Revolutionary epoch in France, yet he wrote his best work on the despotic French monarchy, which he despised.

    asked by mary
  52. crt

    Officials are considering placing the sturgeon on the endangered species list. If such an action is taken, ships, including those that carry goods and produce, will not be allowed to travel on the large rivers in our region that serve as breeding grounds

    asked by Lucy
  53. Statistics

    10, 12, 16, 17, 20 I'm having a problem figuring out how the answer is 64... how do I get that because I have to show my work Thanks for your help

    asked by Steph
  54. fin 200 financial question

    As an investor I wounld mostly be interested in the end result - profitability. Will the money I invest be put to good use and give me a decent return in an acceptable period of time?

    asked by Meshelle
  55. Ethics

    Please help with an assignment: I need to pick 5 articles from the Washington post, each addressing a moral issue. Each essay needs to have one moral issue question based on the following topics. 1. utilitarianism 2. Moral Rights 3. Distributive Justice 4.

    asked by Alexa
  56. spanish

    "Por que no podian encontrar los policias a los criminales?" "Porque los criminales _____ bien!" a. cambiaron b. hacian el papel c. se escondieron d. destruyeron C--to hide (sorry for the missing accent marks)

    asked by y912f
  57. 5th grade Science

    Why does a multicellular organism need specialized cells and why their apperances are different?

    asked by Mark
  58. spanish

    Cuando un policia investiga un crimen, quiere saber todos los _____. a. ladrones b. galanes c. hechos d. vaqueros C--facts

    asked by y912f
  59. spanish

    "Te gustan los programas de compras?" "Generalmente, no. Prefiero tener mas _____ antes de comprar algo." a. informacion b. violencia c. fracasos d. argumentos A--information

    asked by y912f
  60. spanish

    "Quien es el personaje principal de la pelicula E.T.?" "Es _____." a. un monstruo b. un extraterrestre c. un director d. un cientifico B--alien

    asked by y912f
  61. Statistics

    An investigational drug study is being conducted. The initial screening phase needs to include enough people so that the final (approved) group has at least 10 patients. The probability of a person being approved for the study is .80. what initial sample

    asked by Craig
  62. spanish

    "Que paso anoch en Hawaii?" "Hubo una _____ violenta que destruyo muchos edificios." a. terremoto b. erupcion c. direccion d. actriz A--storm

    asked by y912f
  63. spanish

    "Que les dijiste a tus amigos sobre la pelicula de extraterrestres que vimos anoche?" "Les _____ que era demasiado exagerada." a. dijeron b. dijo c. dije d. digo please explain the meaning of the question and how each choice fits in the blank thanks

    asked by y912f
  64. spanish

    It will be very helpful is someone can show me how this would be pronounced: Marianela Pablo? Si, Marianela. Por que tan triste, mi amor? Es que...Bueno, es que yo siempre salgo a almorzar a las doce. Tu sales un poco mas tarde, no? Por que me haces esa

    asked by y912f
  65. Algebra

    Factor: 2x^4-4x^3y^2+8x^2y Thanks for the help!

    asked by Student
  66. math

    how do u factor 7x^3+28x^2-35x ? thanx.

    asked by Matthew
  67. 6th grade science

    what is the purpose of testing variables I am stuck, can you help me?

    asked by nicki
  68. math

    wouldn't 503 to base 5 be 2003 there are 20 sets of 5 with no extra sets of 5 and 3 left over correct

    asked by jessica
  69. amino acids

    For the amino acid Lysine, the nitrogen with the H attached to it is not basic (since you can draw out the resonance for it). But the other nitrogen that has a double bond is not basic. Why is this?? I can draw out the resonance for the double bonded

    asked by Kim
  70. human resources

    What are some advantages and disadvantages of delegation, Why do some managers choose not to delegate?

    asked by kelly
  71. science

    is the Paricutin volcano in mexico still active?? please help me!!

    asked by bo
  72. Pre-Algebra

    I'm stuck on these two problems; can someone show me how to solve them step-by-step? Thanks 1.A baseball diamond is a square 90 ft on each side. How far is it diagonally from home plate to second base? 2.An equilateral triangle has sides 10 units long.

    asked by mysterychicken
  73. Question

    with the government stepping in, does this mean that all of the people who invested money in GM have lost it?

    asked by Meshelle
  74. spanish

    "A que hora empezo la tormenta anoche?" "_____ las diez cuando empezo a llover." a. son b. fueron c. fue d. eran "At what time did the storm start last night?" "_____ at 10 when it started to rain." can you please tell me how each of the answer choices

    asked by y912f