Questions Asked on
December 1, 2007

  1. Chemistry

    In a thermochemistry experiment the reaction of 0.0857 g of an unknown metal and an excess of 4.0 M HCl resulted in a 0.210 mL decrease in the volume of an ice/water mixture. Calculate the enthalpy of this reaction per 1 g of metal reacted. Needed data:

    asked by Raj
  2. chem

    You are given the following data. P4(s) + 6 Cl2(g) 4 PCl3(g) H = -1225.6 kJ P4(s) + 5 O2(g) P4O10(s) H = -2967.3 kJ PCl3(g) + Cl2(g) PCl5(g) H = -84.2 kJ PCl3(g) + 1/2 O2(g) Cl3PO(g) H = -285.7 kJ Calculate H for the following reaction. P4O10(s) + 6

    asked by mel
  3. Chemistry

    Is it possible for the dispersion forces in a particular substance to be stronger than the hydrogen bonding forces in another substance? I get that in general, LD is weaker than H-bonding, but LD does exist is both polar and nonpolar substances and what if

    asked by Vardaman
  4. chem

    2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) H = -118 kJ Calculate the heat when 112.4 mL of 0.500 M HCl is mixed with 300.0 mL of 0.515 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0°C and that the final mixture has a mass

    asked by mel
  5. physics

    A crate is resting on the bed of a moving truck. the coefficient of static friction between the crate and the truck bed is 0.40. the driver hits the brakes. assuming the truck is traveling on level ground, determine the maximum deceleration that the truck

    asked by ajo
  6. check my essay

    analysis poem blackberry picking Rough Draft of Blackberry Picking In Seamus Heaney's "Blackberry Picking," Heaney uses intense language, visual imagery, gaustory imagery auditory imagery and metaphors to enable the reader to experience blackberry picking

    asked by Anonymous
  7. Math - Geometry

    Two right triangles are touching at the tips. The left triangle has the 90 degree angle to the bottom left, and 33 degrees on the bottom right. Based on this info, the other angle is 57 degrees. The right triangle has the right angle given, but it is on

    asked by Nikki
  8. organic chem

    How is the rate of heating adjusted when using a sand bath as a heat source?

    asked by kales
  9. English

    How could you combine the following two sentences into one compound sentence? The rabbit jumped into the bushes. The dog followed it. a. After the rabbit jumped into the bushes, the dog followed it. b. The dog and the rabbit jumped into the bushes. c. The

    asked by Maya
  10. eng can u see my completes essay?

    Can you please revise, thank u “When Life Imitates Video” According to John Leo’s essay “When life Imitates Video” violent video games with graphic content have a negative affect on a child’s behavior. He indicates how these types of games

    asked by christi
  11. English

    Which of the following is a compound sentence? a. Kim will take her daughter shopping when she learns to behave in public. b. Sue gave Jim a new racket, and he left for the tennis courts. c. Rain and heavy winds caused damage along the coast. d. We found

    asked by Maya
  12. chem

    Consider the following reaction. 2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) H = -118 kJ Calculate the heat when 112.4 mL of 0.500 M HCl is mixed with 300.0 mL of 0.515 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0°C and

    asked by mel
  13. business math

    Question: You receive the results of a paired-comparison preference these of four soft drinks from a sample of 200 persons. The results are as follows: Koak Zip Pabze Mr.Pep Koak ---- 50 115 35 Zip 150 --- 160 70 Pabze 85 40 --- 45 Mr.Pep 165 130 155 ---

    asked by george
  14. english

    hardship on returning soldiers

    asked by Anonymous
  15. math

    A patient has been instructed to take 15ml of alumina and magnesium oral suspension every other hour for four doses daily. How many days will two 12 oz bottles last?

    asked by jen
  16. Physics

    A railroad flatcar is loaded with crates. The coefficient of static friction between the crates and the floor is 0.27. If the train is moving at 59.7 km/hr, in how short a distance can the train be stopped with a constant acceleration without causing the

    asked by Lindsay
  17. Chemistry

    Calculate the percent dissociation of acetic acid (Ka = 1.8 x 10-5) in a solution containing 0.00973 M CH3COOH and 0.0124 M K(CH3COO). Report your answer to 2 significant figures. Thanks!

    asked by Meena
  18. history

    Exploration (people being able to explore unknown continents and countries) was aided by astronomy (the stars showed direction) and the development of what instrument? Is it the compass?

    asked by Rose
  19. English

    Can you check if my explanation is weak, moderate or strong? Tell me why is it weak, moderate or strong. If it's weak, what can I do to improve my explanation? Point: In addition, __________ intimidates the patients to show how powerful she is and that she

    asked by Anonymous
  20. organic chemistry

    What is the purpose of the outerjacket on a fractionating column?

    asked by kales
  21. Quadratic equation...

    Hi Can anyone help me solve the quadratic equation for the following:- The motion of a two stage rocket is stated by it height y in metres above the ground since t seconds since launch. Flies vertically Ist stage burns for 5 seconds and cuts out. 2nd stage

    asked by Leo
  22. Science

    How do you compare and contrast the distances between the planets in the solar system. Which planets are relitively close together and which planets are far apart?

    asked by Chandni
  23. algebra

    find the average weight in pounds of a type of bird of your choice. Use the rational exponent equation L = 2.43 * W^0.3326 to estimate the wingspan L in feet of the bird that weighs W pounds show the average weight. How do I show the calculations necessary

    asked by Rick
  24. algebra

    (2x+3)/5 = -(3x-2)/2 - (-3/2)(-3/2) I've done this problem a few times and keep getting -37/38 which seems like a dumb answer to the problem. I know I think the answer should be a whole number so I don't know if that's what's confusing me. Is my answer

    asked by rose
  25. Social Studies.

    where can i find information to answer these questions How do you think an average American’s perceptions of Muslim and Arab groups are created and what people think are the common United States-centric viewpoints on Muslim and Arab American and

    asked by Rachael
  26. Academic 4-year plan: Zoology

    I want to work in the field of zoology when I get older, and I'm filling out an "academic 4-year plan" our counselors gave to my class to complete and turn in on Monday. The science and math I'm taking this year are physics and geometry. Can you take

    asked by Emily
  27. SCI 275

    Provide at least three freshwater and three ocean water resource challenges

    asked by dawn
  28. math

    After a triangle is rotated 180 degrees, its vertices are at (-4,1),(-1,4), and (-5,-8). What were the coordinates of the vertices before the rotation? I think the answer is (1,-4), (4,-1),(8,-5). Is this right?

    asked by robert
  29. English

    For an analysis essay or a research essay of a novel, the format is point/proof/explanation and I'm asking what is explanation? Can someone please explain me what "explanation" thoroughly with examples too?

    asked by Anonymous
  30. math

    After a triangle is rotated 180 degrees, its vertices are at (-4,1),(-1,4), and (-5,-8). What were the coordinates of the vertices before the rotation? I think the answer is (1,-4), (4,-1),(8,-5). In rotation, the coordinates get switched. All I just did

    asked by robert
  31. Bio

    Describe what can happen to the three-carbon molecules made in the Calvin cycle.

    asked by Andrea
  32. business math

    I figured out question (a) However, I am having a problem coming up with the correct answer for (b). Can someone offer me some assistance. Thank you. Question: You receive the results of a paired-comparison preference these of four soft drinks from a

    asked by george
  33. Communications

    I am supposed to survey people because I am doing a research paper about slang. Can anyone please answer these questions for me? The more answers I get the better. I would appreciate it so much. 1)What kind of slang do you use when text messaging? 2)What

    asked by Monica
  34. science help

    predict how the following pairs of atoms will combine by writing the fromulas for resulting compunds can you help me with the first to to use as an example for the 30 problems please H (+1) and SO 4 ( - 2) the 4 is below the O Al ( +3) and SO4 ( -2 ) the 4

    asked by sam
  35. Economic Geography

    The geography of consumption if different from geography of production. Why? What does it mean to say that our geographies of consumption are becoming increasingly disjunct from the geographies of other aspects of our everyday lives (work, school, etc)?

    asked by Steve
  36. Academic 4-year plan: Zoology

    Can you take AP Chemistry without taking any previous chemistry class?

    asked by Emily
  37. BIO HELP! Light Reactions + Calvin Cycle

    Explain why the light reactions and the Calvin cycle are dependent on each other.

    asked by Tina
  38. math

    An antibiotic is reconstituted with 128ml of water to yield 250mg/5ml. A) If the child weighs 66 pounds what will the dose be at 5mg/kg/dose? B) If the medication is given qid x 10 days, will the 150ml bottle be enough?

    asked by jen
  39. math: HELP,HELP!!!!

    what are like teerms and constants?

    asked by Rosa
  40. English

    Can you look at my rough outline to see if my points and my main idea is relevant to my focus? And if it isn't, please give me specific ideas on how to improve? ---- I'm writing a paragraph on the focus: A leader is a representative of the totalitarian

    asked by Anonymous
  41. Cultral Diversity

    What is one word that could discribe all or some of the following words for easier research; linguistic, political, social, economic, religious?

    asked by Trish
  42. english

    Is the central theme of Morte d’Arthur consequences of greed?

    asked by Tabby
  43. Biology

    Explain how the world would be different if C4 plants and CAM plants had not evolved.

    asked by Mikey
  44. science

    why are electromagnetic waves called perpetuating waves?

    asked by allison
  45. Math

    I'm tutoring someone 1st year arts math and they have been given this difficult question that I cannot mind boggel. It goes as follows: There are 6 couples at a party. Each can shake another persons hand once, but they can never shake their spouses hand.

    asked by Jeff
  46. English

    Imagine that you have been asked to speack to a senior citizens group about a college university. Describe how you would prepare for your speech with this particular group of listeners. Include discussion on how you would conduct an audience analysis, how

    asked by John Nguyen
  47. Accounting

    I am just wanting to see if i chose the right answer. Deferred expenses have _________. not yet been recorded as expenses or paid been recorded as expenses and paid been incurred and paid not yet been recorded as expenses I put that not been recorded as an

    asked by Cindy
  48. literature

    returning soldiers and broken homes

    asked by romina
  49. Physics

    Where does the energy from a battery come from? When you use the battery to run a flashlight where does the energy go?

    asked by Anonymous
  50. Maths-Trig

    How does sin(c+h)=sin(c)xcos(h)+cos(c)xsin(h) please explain

    asked by xX_Supaman_Xx
  51. math

    What is the definition of a constant? Can you show me an example of one too? Thanks

    asked by Lisa
  52. math

    suppose x S f(t) dt= x^2 - 2x + 1. Find f(x). 1 S = integral and 1 = lower level, x = upper i don't understand what i'm supposed to find/what to do and i didn't make any typos.

    asked by zee
  53. YO, Help ME!

    I need Directions to Ramapo College!

    asked by Mack
  54. social studies

    whats a summary and how do i write one

    asked by zahra
  55. history

    Britain was one of the first countries to experience the Renaissance, right?

    asked by Rose
  56. Shakespeare

    Is the the central them of both sonnets 31 and 39 hopeless love?

    asked by Tabby
  57. math

    After a triangle is rotated 180 degrees, its vertices are at (-4,1),(-1,4), and (-5,-8). What were the coordinates of the vertices before the rotation? I think the answer is (1,-4), (4,-1),(8,-5). Is this right?

    asked by robert
  58. English

    What's a proper word for "(expletive)". For example, She stole my pencil, that (expletive)!

    asked by Anonymous
  59. English

    What's a proper term for "mother-like figure"?

    asked by Anonymous
  60. trig

    solve this equation: 4x^3-4x^2+13x-6=0 note: that's suppose to be 4x to the third and 4x squared

    asked by Amanda
  61. Math

    Prove that a simple graph with n >_ 2 vertices must have atleast two vertices with the same degree. There was a hint given in the book saying that the key to this is the graph can not have both a vertex of 0 degree and a vertex of n-1 degree Thanks

    asked by Matt
  62. english

    i need to find two of the following: song, artwork, or interpretive art that directly correlate to the king arthur legends... i've found some but anyone else have any others?

    asked by maggie r
  63. math

    suppose x S f(t) dt= x^2 - 2x + 1. Find f(x). 1 S = integral and 1 = lower level, x = upper i don't understand what i'm supposed to find/what to do and i didn't make any typos.

    asked by bex
  64. dr bob

    how did you make the sub 2 h woth the two next to it but lower on the computer

    asked by sam
  65. anatomy

    Why does meiosis stop at phase II for the female and does not finish until after it has been fertilized by a sperm?

    asked by suzanne
  66. Science

    What are the names of different Alkalis

    asked by Stuart Astle
  67. quantative methods

    is there anyone who can help me with quantative methods?

    asked by shirleyann
  68. English

    2) Imagine that you have been asked to speak to a senior citizens group about a University College. Describe how you would prepare for your speech with this particular group of listeners. Include discussion on how you would conduct an audience analysis,

    asked by John Nguyen
  69. Math

    Prove that a simple graph with n >_ 2 vertices must have atleast two vertices with the same degree. There was a hint given in the book saying that the key to this is the graph can not have both a vertex of 0 degree and a vertex of n-1 degree

    asked by Matt
  70. social studies

    The Dutch colony of ? was taken over by the English. King Charles 1 gave the Puritans a charter to settle in ? Thanks!!!!

    asked by roy
  71. English

    Quick question, Can someone use intimidation as a tool to manipulate people? And can you give me an example to demonstrate this if you can because I don't get it.

    asked by Anonymous
  72. literature

    what figure of speech is "summer wealth", in the phrase: Stripped of its summer wealth.

    asked by sam
  73. Physics RC

    how does the circuit potential difference,v, across the capacitor varies with R(resistance)in an RC circuit??

    asked by AllyKat
  74. constitution

    what are common privacy rights held by us citizens?

    asked by kelly
  75. Grade 10 Science

    A racevar accelerates from rest to a final speed of 250km/h. What is the average acceleration of the car? and John beings to walk faster and accelerates at a rate of 5km/h^2. How long did it take him to reach a top speed of 12 km/h? I didn't know how to

    asked by Emily
  76. math

    What is the definition (in understandable language) of like terms. Can I see an examle too? Thanks ur a life saver!

    asked by Lisa
  77. accounting

    what is the most important step in the acounting cycle

    asked by rob
  78. english

    How did Chaucer depict the intervention of gods or goddesses in the story The Canterbury tales - The Nun's Priest Tale about Chauntecleer?

    asked by Tabby