Questions Asked on
August 3, 2010

  1. chemistry

    I have posted this once and still cannot get the correct answer. Determine the mass of carbon monoxide that is produced when 45.6 of methane, CH4, react with 73.2 g of oxygen , O2. The products are carbon monoxide and water vapour.

    asked by Kelsey
  2. trigo

    A space shuttle pilot flying toward the Suez Canal finds that the angle of depression on one end of the canal is 38.25deg and the angle of depression to the other end is 52.75deg. If the canal is 100.6 mi long, find the altitude of the space shuttle.

    asked by trigofunctions
  3. trigo

    A submarine at the surface of the ocean makes an emergency dive, its path making an angle of 21deg with the surface. a. If it goes for 300 meters along its download path, how deep will it be? What horizontal distance is it from its starting point? b. How

    asked by trigofunctions
  4. American Gov't

    I'm not sure which to pick? What is the term limit for senators? Two terms=not correct Four terms= not correct Six terms=? There are no term limits=? Iknow its not the first two but in my text material it says every 6 years but then again it also says

    asked by Ariel
  5. math

    the product of two positive numbers is 9 18/25 and one of them is three times the other. find the numbers.

    asked by shahida
  6. ENGLISH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    Read each sentence. Select the BEST option that describes the sentence. Some options will define a structural flaw and may or may not suggest a way of fixing the problem. Some sentences have correct structure, and you may find that is the best option.

    asked by ARC
  7. trigo

    Because of the wind, a boat sails 4,728 meters in the direction S 47deg29mins W. How far south it goes? How far west has it gone?

    asked by trigofunctions
  8. 9th grade

    At a certain time, a vertical pole 3 meters tall casts a 4 meter shadow. What is the angle of elevation of the sun? Round your answer to the nearest meter

    asked by nae
  9. Science

    Consider the following reaction: 2Na + Cl2  2NaCl ΔH = -821.8 kJ (a) Is the reaction exothermic or endothermic? (b) Calculate the amount of heat transferred when 5.6 g of Na reacts at constant pressure. (c) How many grams of NaCl are produced during an

    asked by Joseph
  10. chemistry

    A small “coffee cup” calorimeter contains 110. g of H2O at 22.0°C. A 100. g sample of lead is heated to 90.0°C and then placed in the water. The contents of the calorimeter come to a temperature of 23.9°C What is the specific heat of lead?

    asked by Joseph
  11. geogerafy

    discuss the various levels of economic activities and how they are linked to the use of natural resources. Use examples to improve your answer.

    asked by Anonymous
  12. maths

    tanA/secA-1 + tanA/secA+1 = 2 cosecA

    asked by sakeena
  13. Physics

    A bullet with a mass of 4.0 g and a speed of 650 m/s is fired at a block of wood with a mass of 9.7×10−2 kg. The block rests on a frictionless surface, and is thin enough that the bullet passes completely through it. Immediately after the bullet exits

    asked by Todd
  14. math

    Multiplying and Dividing Rational Expressions: 2) x^2-8x+7/x^2+6x-7 = (x-7)/(x+7) 3) x^2-5x+6/x+4 times 3x+12/x-2 =3(x-3) 4)2x-3/5x+1 divided by 6x^2-13x+6/15x^2-7x-2=1 5) x^3-9x/x^2+11x+24 times x^2+7x-8/x^2-4x+3= x(x-3)(x-1)/(x+3)(x+8) 6) 4x-8/x^2-x-6

    asked by Jetta
  15. human growth and development

    Both before and after birth,physical development follows the cephalocaudal principle and the proximodistal principle.Which pair pf events below best illustrates first cephalocaudal,then proximodistal development? a)Izzy could clap his hands stamp his feet

    asked by vedrana
  16. Physics

    A 90 kg astronaut and a 1100 kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.24 m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with

    asked by Todd
  17. Physics

    A 1.10 kg} block of wood sits at the edge of a table, 0.790 m above the floor. A 1.10×10−2 kg} bullet moving horizontally with a speed of 725 m/s embeds itself within the block. What horizontal distance does the block cover before hitting the ground?

    asked by Todd
  18. Algebra 2

    Story problems are my favorite. However, I can not figure this one out. THe stopping distance d of a car after the breaks are applied varies directly as the square of the speed r. If a car traveling at 70mph can stop in 270 ft. How many feet will it take

    asked by Christy
  19. physics

    if a negative charge particle is placed on the left side and a higher positive charge particle is placed on the right side, why is the location that makes electric field zero is on the left of negative charge rather than in between or on the right of

    asked by blast
  20. trigo

    The pilot of an airplane left A and flew 200 miles in the direction S 20deg20mins W. He then turned and flew 148 miles in the direction S 69deg40mins E. If he now heads back to A, in what direction should he fly?

    asked by trigofunctions
  21. trigo

    An observer at A looks due north and sees a meteor with an angle of elevation of 70deg. At the same instant, another observer 30 miles east of A, sees the same meteor and approximates its position as N 50deg W but fails to note its angle of elevation. Find

    asked by trigofunctions
  22. AP chemistry

    A 28 g sample of iron ore is treated as follows. The iron in the sample is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 19.5 g. What was the mass of iron in the sample of ore? Answer in units of g.

    asked by Tasha
  23. human growth and development

    Marty's moral reasoning was tested with Kohlberg's moral dillemmas.It was determined that Marty has reached Kohlberg's highest level of moral reasoning,postconventional.We know ,therefore,that Marty: a)will always act in accordance with postconventional

    asked by vedrana
  24. Chemistry - please help

    Please help to determine the (%w/w) benzoyl peroxide (C14H20O4) in a sample. Procedure: 2.500g of sample was dissolved in 75ml dimethylformamide and diluted to 100.0ml with the same solvent. (Solution T). To 5.0ml of Solution T, 20ml of acetone and 3ml of

    asked by angela
  25. human growth and development

    According to Costa and MCrae five factor model of psychosocial development in adulthood,we can expect that our personalities are likely to: a) remain fairly stable over the course of our adult lives b)change a great deal between young adulthood and middle

    asked by vedrana
  26. trigo

    Two points, A and B, are 526 meters apart on a level stretch of road leading to a hill. The angle of elevation of the hilltop from A is 26deg30mins, and the angle of elevation from B is 36deg40mins. How high is the hill?

    asked by trigofunctions
  27. English!

    i need help finding couple of The Qualifications Necessary to Success in Life for my essay...i got 2...which are good attitude and good education(in the "good education" paragraph i added jobs and money)...thnx!

    asked by Thara
  28. Chemistry

    Please be specific. In an experiement 23.4 g of iron sulphide, FeS are added to excess oxygen, and 16.5 of Iron oxide, Fe2O3 are produced. The balanced euation for the reaction is 4FeS =7O2 -- 2Fe2O +2SO2. Calculate the percent yield of iron oxide in the

    asked by Kelsey
  29. Physics

    A diesel engine takes in 0.5 moles of air at 20.0C and at atmospheric pressure. It then compresses it adiabatically to one twentieth of its original volume. which means n = 0.5 T = 20 and Vfinal = V1/20 but where do I go from here? can anyone help?

    asked by Physics
  30. math

    Jim was able to sell a hand carved statue for 670$ which was a 35% profit over his cost. How much did jim pay?

    asked by pyt
  31. calculus

    find the equation of the tangent line at the given value of x on the curve 2xy-2x+y=-14, x=2

    asked by a
  32. social studies

    Personality psychologists are concerned with ______________ in a given situation. average behavior crowd behavior individual differences in behavior all of these

    asked by Tina
  33. applied chemistry

    A sample of oxygen occupies 10.0 L under a pressure of 105 kPa. At what pressure will it occupy 13.4 L if the temperature does not change?

    asked by chris
  34. english

    compare and contrast the conflicts in john updike's "son" and julia alvarez's "daughter of invention"

    asked by pam
  35. trigo

    Points A and B are on the same horizontal line from the foot of a hill and the angles of depression of these points from the top of the hill are 30deg and 22deg, respectively. If the distance between A and B is 75m, what is the height of the hill?

    asked by trigofunctions
  36. trigo

    A passenger on a ship sailing north at 5.0 mph noticed that at noon a radio tower on land was due east of the slip. At 1:30pm, the bearing of the tower from the ship was S 35deg E. How far was the ship from the tower at 1:30pm?

    asked by trigofunctions
  37. wo9rld history

    what dose a 16 making pictures of a bomb and threating a school have in comman with world history what is the text to text to that

    asked by jess
  38. Math

    A cookie sheet measures 13 x 9 inches. If each cookie has a diameter of 3 inches, how many cookies could fit on the sheet? You need to allow for 1/4 inch around each cookie.

    asked by Julie
  39. science

    what is the appearance of: Iron? Sulphur? A mixture of both when heated?

    asked by grace
  40. Math

    t/6 - t/14= 1/6 Is there a solution for this problem?

    asked by Amber
  41. Algebra

    Find the LCM 35b^4c^5,7b^4c^4,10b^9c^3 Would the answer be 70?

    asked by Bailey
  42. macroeconomics

    Atlantis is a small, isolated island in the South Atlantic. The inhabitants grow potatoes and catch fresh fish. The accompanying table shows the maimum annual output combinations of potatoes and fish that can be produced. Obviously, given their limited

    asked by Regina
  43. Math word problems

    To determine the number of deer in a game preserve, a conservationist catches 428 deer, tags them and lets them loose. Later 644 deer are caught.161 of them are tagged. How many deer are in the preserve?

    asked by George
  44. Math

    Simplify Completely: 1260/4410 How is this process accomplished? I spend 1 hour trying each number trying to factor the numerator and denominator squared or cubed and get too frustrated, resulting in no answer at all Thanks for your help!

    asked by Julie
  45. algebra

    2. Biologists want to set up a station to test alligators in the lake for West Nile Virus. Suppose that the costs for such a station are $3000 for setup costs and $2.00 to administer each test. e. How many animals should be tested for the average cost to

    asked by rj
  46. human growth and development

    Gateway drugs are so named because their use may lead to use of more addictive substances.Long term,heavy use of marijuana: A)is not as dangerous as once thought B)is not as commonly used as cocaine C)can impair memory and attention D)is the leading cause

    asked by vedrana
  47. Biochem

    10ml of HCl acid titrate with 9.9ml of NaOH. What is the mass in grams of HCl?

    asked by Amrik
  48. Math

    A tank in the shape of a cone has a diameter of 8 feet and a height of 10 feet.when there is water in the tank, th water is in the shape of a cone too. find the radius of the cone of water when the water is 2 feet high. Explain how you would solve it.

    asked by Cynthia
  49. geometry

    M and N are the midpoints ofandrespectively. Using graph paper, repeat this process from the last problem using different coordinates for P, Q, and R. How do these lengths MN and PQ compare now? What do you think you can conclude about the lengths of these

    asked by anonymous
  50. economics

    Is the mrts? a. minuse one times the ratio of marginal products for ea. input? b. the slope of the marignal revenue product curve c. the marginal products of either input d. the slope of an icocost curve

    asked by bj
  51. English

    I need help figuring out what strategy is used to begin a essay. Is it Development by example, process analysis, comparison and contrast, definition, classification or causal analysis? Last June, as I stood behind the bright orange guard door of the

    asked by Keisha
  52. Math 208

    Graph y

    asked by Jackie
  53. Physics - Inertial frame of reference

    Identify the defining characteristic of inertial and non-inertial frames of reference. Give an example of each type of frame of reference.

    asked by Shaila
  54. Repost-Chemistry -please help

    Hi, sorry I missed out something. The titrant used was 0.100M Sodium thoiosulphate.Do I have to consider its concentration in the calculations? Thanks a lot. Posted by angela on Tuesday, August 3, 2010 at 6:58pm. Please help to determine the (%w/w) benzoyl

    asked by angela
  55. writing sentences and paragraph assignment

    I have to write these paragraphs for a writing assignment and just wasn't sure is I was doing it right. Need some advice!! ASSIGNMENT: You’ve applied for a specific job in your field of study. The Human Resources Department arranges an interview and

    asked by courtney
  56. Economics

    Whenever an industry fails to achieve allocative efficiency by producing too little output, a shortage arises. What is wrong with this statement

    asked by Anonymous
  57. math

    The difference between Molly and Chase's age is 35. if Molly is 3 times Chase's age plus an additional 10 years,how old are they?

    asked by sam
  58. Algebra

    (x^2 + x) + ã(x^2 + x) - 2 = 0

    asked by Jameisha
  59. english/grammar

    I am writing a persuasive essay. I have my facts, but only one source. My teacher insists that I provide more sources. I have been looking for days in a variety of ways and have found nothing. My essay argues that renting saves time and money compared with

    asked by Alicia
  60. algebra

    2. Examine the rise in gasoline prices from 1997 to 2006. The price of regular unleaded gasoline in January 1997 was $1.26, and in January 2006, the price of regular unleaded gasoline was $2.31 (“Consumer price index,” 2006). Use the coordinates (1997,

    asked by Bubba
  61. trigo

    A surveyor made the two sections of the railroad bridge, both at 210 meters in length. Suppose that the maximum angle of elevation of each section is 75deg. When the bridge is closed, the water level is normally 13 meters below the bridge. a. When the

    asked by trigofunctions
  62. cell biology

    draw the structure 1-palmitoyl-2-sn-glycero-3-phosphoinositol.using the drawing, illustrate the difference between saturated and unsaturated fatty acids 16:0 and 18:1, n-9

    asked by kim
  63. writing

    A résumé that is marred by grammatical errors, for example, may prevent a job candidate from progressing to the interview stage. Do you think it is appropriate for people to be judged based on their writing? Explain your answer.

    asked by Anonymous
  64. the american free enterprise system

    a market in no one controls the prices is called

    asked by bettyrobinson
  65. US History II

    Would the NASA spacecraft landing on Mars be somehow related to the Republican victory in Congress of 1994?

    asked by Amy~
  66. English

    I need help finding two interesting novels which have the same theme that could be compared in an essay. Can any one suggest me any number of novels which would be worth reading and writing an essay about. I like reading murder and romance novels.

    asked by Shaila
  67. Chemistry Please help

    Compare the chemical composition of biofuel and biogas to carbon dioxide which is the product of complete oxidation of glucose? Any help is greatly appreciated.

    asked by Sandi
  68. American Gov't

    These are the problems I had difficulty with out of 35! 1.)Which is true about the roles of lieutenant governor and vice president? =a)Both are always elected separately from the chief executive. b)Lieutenant governors have more power than the vice

    asked by Ariel
  69. 6th grade math

    Why is the best- the mean or median- to use when planning a trip? Why? HELP PLEASE! I'M STUCK!

    asked by Anonymous
  70. business

    How can critical thinking be implemented into management?

    asked by Mom40
  71. Math

    3/4 - 4/7= -2/5 - 3/4= 5//6 + 7/10= -5/6 X 2/5=

    asked by Tina
  72. capstone class, management

    Scenario: You work as the manager of the second largest bank in your region of the United States. The bank's top management team has asked you to present an overview of how the current economy and financial changes have impacted your business and what

    asked by Crystal
  73. geometry

    Use the diagram below for the following question. P(2,1), Q(11,1), and R(8,7) M and N are the midpoints ofandrespectively. Find MN and PQ. How do these lengths compare with each other?. (its a triangle)

    asked by anonymous
  74. math

    an irrational number greater than one but less that two ?

    asked by lisa
  75. arithmetic

    what is the decimal of 7/20 how do u figure it out i need step by step break down

    asked by sandra
  76. university of phoenix

    Need some help with the american heart assoication trying to write a 1050 word paper by midnight phoenix time. Could you assist

    asked by lokisha
  77. Physics - stage trick

    A stage trick involves covering a table with a smooth cloth. When the cloth is suddenyl pulled horizontally, the dishes "magically" stay in position and drop on to the table. a)identify all the forces acting on the dishes during the trick b)explain ho

    asked by Shaila
  78. physical science

    if an engine must do 500 joules of work to pull a 10 kg load up to to a height of 4 meters ,what is the efficiency of the engine ?

    asked by llulia
  79. Us history

    what is predestination and how did it affect New England

    asked by jessica
  80. chemistry

    what is the symbol for extreme temperature in lab

    asked by susan
  81. cultural diversity

    what do statistics reveal about Asian diversity in America?

    asked by john smith
  82. Statistics

    If many random samples of 64 students who took the second midterm examination in Math 10 are taken, what is the 95th percentile of the average time to completion for these samples? Explain what this number means.

    asked by Anonymous
  83. science biology

    1. What is the name given to the type of organisms that can use Photosynthesis to produce glucose? In addition, provide three specific examples.

    asked by maria
  84. chemistry

    true or false: when water which is used to dissolve glucose is heated from 25 degrees to 80 degrees the solubility of the glucose is increased.

    asked by tonya
  85. spanish

    What does "Le Vive" mean in Spanish when translated into English.

    asked by Dessie
  86. Algebra

    A rectangular sheet of paper measures 2/3 FT by 1/5 FT. what is the area

    asked by dale
  87. College Math


    asked by Anonymous
  88. geometry

    If the diagonal of a square has a length of square root of 30, what is the square's area?

    asked by Sarah
  89. accounting

    hi,..!! i hope u can answer it,.. the following data are gathered prior to the preparation of the year end adjusting journal entries of IEMELIF enterprises: nature: last payment date: TAXES december 15, 20-7 ELECTRICITY december 22, 20-7 WATER december 10,

    asked by jhona
  90. Chemistry

    A solution is made by diluting 18.2 g glucose (C6H12O6) in 0.150 kg water. What is the mass percentage of solute in this solution?

    asked by Jake
  91. Biopsychology

    What are the four methods for studying the cerebral lateralization? I have three I just don't know what the fourth is. 1. The sodium amytal test 2. The dichotic listening test 3. Functional brain imaging 4. ?

    asked by B
  92. math

    Multiplying and Dividing Rational Expressions: 1. 2x^4/x^5 times 6x/x^3 times x/4= 3/x^2

    asked by Jetta
  93. Math

    3/w+1 + 2/3w= ? would the answer be 5/4w+1

    asked by George
  94. geometry

    How many planes are determined by "n" points, no four of which are coplaner?

    asked by anonymous
  95. geometry

    Use the diagram below for the following question. P(2,1), Q(11,1), and R(8,7) M and N are the midpoints ofandrespectively. Find the coordinates of M and N. (its a triangle)

    asked by anonymous
  96. college

    Have you ever used mnemonics (see p. 139 of your text) to remember something complicated? If so, describe the techniques you used. What ways might you use mnemonics to be a more effective college student and adult learner?

    asked by Anonymous
  97. chemistry

    what helps to hold funnel up during filtration

    asked by susan
  98. cultural diversity

    what do you believe is the future of Asian diversity in America?

    asked by john smith
  99. development markets

    Much of how you have been trained in you management and economic education has centered around the American market place. That means one is selling products to a market that has relatively high income by world standards. Another way of saying this is that

    asked by mike Gee
  100. math

    Max. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla, and strawberry. One of Max’s friends, Stacey, eats chocolate exclusively How many different kinds of

    asked by nana
  101. MATH

    I'm having a hard time understanding Rational exponents Simplify if possible 1.(-8)1/3 **note 1/3 is the exponent 2. -49 5/2 ***note 5/2 is the exponent

    asked by TEE
  102. writing call

    In what ways are full-sentence outlines more beneficial than topic outlines? o Explain why it may or may not be simpler to write your paper instead of first creating a full-sentence outline. o What steps will you take to turn your outline into the body of

    asked by liz
  103. algebra

    It is known that making 1 lb of honey requires 20000 trips by bees to flowers to gather nectar how many pounds of honey would 35000 trips produce?

    asked by Anonymous
  104. medical coding 1

    Could someone please check over my answers, and give me the correct answers if they are wrong. Thanks you very much for any and all help. 1. Which one of the following items must be included in a general multisystem examination of a constitutional system?

    asked by Helen B.
  105. History

    How did the U.S. economy change after WWII ended, compared to what it had been like during the war? Use specific examples of what people were able to have and do and what it must have felt like after the scarcity of their wartime experiences.

    asked by S V.