Questions Asked on
June 17, 2011

  1. chemistry

    what is the activity of water at 11bar and 298k

    asked by Anonymous
  2. Chemistry

    Please help me with the following question: Consider the following ion; XF2-2 What is the oxidation number assigned to element “X”? Show your work I'm having trouble writing the steps.

    asked by Amanda
  3. chemistry

    How many grams of propane (C3H8) must be burned to release 3600kJ of energy? Standard Heat of combustion for Propane= -2220 kJ/Mole

    asked by Max
  4. English

    Maya Angelou - I Know Why the Caged Bird Sings What Maya Angelou means by the title of her autobiography.? Please Help if you can

    asked by Erik
  5. Chemistry

    Little confusing!! I need help PLZ!!! Two half cells in a galvanic cell consist of one iron (Fe(s)) electrode in a solution of iron (II) sulphate (FeSO4(aq)) and a silver (Ag(s)) electrode in a silver nitrate solution. a. Assume the cell is operating as a

    asked by Andrew
  6. physics

    A horizontal pipe of diameter 0.845 m has a smooth constriction to a section of diameter 0.507 m. The density of oil flowing in the pipe is 821 kg/m3 . If the pressure in the pipe is 8350 N/m2 and in the constricted section is 6262.5 N/m2 , what is the

    asked by ryan
  7. math

    What is 304 in expanded form

    asked by Anonymous
  8. Chemistry

    For each of the following pairs of elements, state whether the binary compound formed is likely to be ionic or covalent. Give the formula and name of the compound. (a) C, Cl Its covalent, but I get the formula wrong and name wrong,CCl Carbon Chloride.

    asked by Lance
  9. chemistry

    Using the equations and enthalpy values provided, which mathematical expression can be used to determine the unknown enthalpy change of the decomposition of propane? 3 C + 3 O2 3 CO2 H =-1182 kJ 4 H2 + 2 O2 4 H2O H = -1144 kJ C3H8 + 5 O2 3 CO2 + 4 H2O H =

    asked by bryan
  10. Chemistry

    Calculate the heat released when 64.5g of steam at 119 C is converted to water at 36 C. Assume the specific heat is 4.184 J/g*C for water, the specific heat of steam is 1.99J/g*C, and the heat of vaporization is 40.79 kJ/mol for water.

    asked by Sydney
  11. Chemistry

    A neutral molecule is identified as a tetrafluoride, XF4, where X is an unknown atom. If the molecule has a dipole moment of 0.63 D, can you give some possibilities for the identity of X? (Select all that apply.) sulfur nitrogen oxygen polonium phosphorus

    asked by Lance
  12. Chemistry

    Calculate the amount of energy required for the formation of one mole of MgSe bonds (not lattice energy). The radius of the magnesium ion is 0.65 A, and the radius of the selenide ion is 1.98 A. Note that 1 A=10^-10m.

    asked by Ashley
  13. Chemistry

    Calculate the amount of energy required for the formation of one mole of MgSe bonds (not lattice energy). The radius of the magnesium ion is 0.65 A, and the radius of the selenide ion is 1.98 A. Note that 1 A=10^-10m.

    asked by Ashley
  14. SPC

    A consumer organization estimates that 34% of the households in a particular community have one television set, 39% have 2 sets and 18% have three or more sets. If two households are chosen at random, what is the probability that at least one has a

    asked by Brandy
  15. Physics

    A CAR HAS A MASS OF 1200KG TRAVELLING ON A LEVEL ROAD. THE CAR DECELERATED AT A RATE OF 10M/S^2 TILL THE CAR STOPPED. iT HAS TO OVERCOME A TOTAL RESISTANCE OF 400N WHILE BRAKING. (I) CALCULATE THE BRAKING FORCE OF THE CAR (II) WHAT WAS THE DRIVING OF CAR

    asked by Janice
  16. chemistry

    A bungee jumper is standing at the edge of a platform, just about to leap over the side. Midway through the jump, while the bungee jumper is halfway down to the ground, what is the relationship between potential and kinetic energy?

    asked by mireli
  17. geometry

    A tricycle tire has a diameter of 24in.How many feet does the tricycle travel when the wheel makes twelve revolutions? round to the nearest hundreth

    asked by Jacobb
  18. Reading

    Maya Angelou's - I Know Why the Caged Bird Sings is a poem I need help Please anyone 1. Why is Marguerite often embarrassed when Mrs. Flowers visits? 2. What is the relationship between Momma and Mrs. Flowers? 3. What does Mrs. Flowers teach Marguerite

    asked by Billy
  19. american govt

    what two events changed the relatively peaceful relationship between the American colonies and Great Britain

    asked by Anonymous
  20. chemistry

    Use the reaction below to determine the volume of 0.123 M AgNO3(aq)that is needed to form 0.657 g of Ag2SO4 (s). 2AgNO3(aq) + H2SO4(aq) ¨ Ag2SO4 (s) + 2HNO3(l) 2AgNO3 + H2SO4-----Ag2SO4 + 2HNO3

    asked by katydid
  21. chemistry

    When dissolved in 1000 g of water, which chemical compound will produce a solution with the greatest freezing point depression?

    asked by mercedes
  22. Marks

    What shall this 5/90 lotto produce from the last two result. Winning -- Machine 21.20.73.78.18--89.62.83.30.37 68.4. 22. 5 .59--76.25.27.28.44

    asked by Matte
  23. math

    x+y+3z=600 x+y+z=400 1. In the system of equations above, what is the value of x+y? 2. There are 25 trays on a table in the cafeteria. Each tray contains a cup only, a plate only, or both a cup and a plate. If 15 of the trays contain cups and 21 of the

    asked by Julia
  24. ashford unversity

    1. Susan and Molly, employees in a busy call center, are chatting at lunch. Between bites of fried chicken, French fries, high calorie soda, and a tiny salad, Susan begins to complain to Molly that she can’t seem to lose weight and that she is tired all

    asked by larry
  25. math

    An iceberg breaks off from the Antarctic continent and floats due north at constant velocity/ It's latitude south decreases by 1 degree in 8 days. Taking the circumference of the earth to be 40 000km, calculate the speed of iceberg in ms^-1.

    asked by ivy
  26. physics

    A small rectangular ferry boat is 3.33 m wide and 5.64 m long. When a loaded truck pulls onto it, the boat sinks an additional 3.25 cm into the river. What is the weight of the truck? The acceleration of gravity is 9.8 m/s2 . Answer in units of kN.

    asked by ryan
  27. algebra

    Find an equivalent expression with the given denominator 4/n=?/n 2power. The expression that is equivalent to 4/n is

    asked by Maria
  28. Amelia Douglas

    I was reading through some information about Amelia Douglas since I'm doing a biography on her, and I came to know that she had saved her husband Jame's life. I tried to make sense out of what I was reading, but I could only gather information that I

    asked by Emma
  29. maths

    two numbers are in the ratio of2:3.If the sum of their sqares is 468,find the numbers

    asked by yatin
  30. Reading

    I Know Why the Caged Bird Sings ok i got the first too who wants to help with this please i love yall forever 3. What does Mrs. Flowers teach Marguerite about uneducated people? 4. What does Marguerite learn when she listens to Mrs. Flowers read A Tale of

    asked by billys back
  31. math

    traffic signs are regulated by the manual on uniform control devices. the perimeter of some traffic sign must be 128 inches. Also its length is 6 inches longer than its width. Fin the width and the length of the sign.

    asked by willa
  32. chemistry

    How much energy must be put into a system to raise 100 g of solid water from 5.5 degrees Celsius to 75 Degrees Celsius? Heat Capacity of Ice: 2.09 J/g degrees C Heat Capacity of Water: 4.18 J/g degrees C Heat of Fusion: 6.01 kJ/mol

    asked by Britney
  33. Operating research

    Use simplex method to solve Maximize p = 30x + 20y+30z subject to x + y+z

    asked by Terry
  34. operation research 1

    Use simplex method to solve Maximize p = 30x + 20y+30z subject to x + y+z

    asked by mashoo
  35. maths/Operating research

    Solve the LP using graphical method Maximize p = 30x + 40y subject to x + y

    asked by lilian
  36. exp in math

    if a person earn 23,600 one year and get a 5% raise in salary what is the new salary?

    asked by Nichole
  37. statistics

    at the 0.05 level of significance, is there a difference in the variance of the study time for male students and female students?

    asked by Anonymous
  38. maths

    two numbers are in the ratio of2:3.If the sum of their sqares is 468,find the numbers please answered me imediately

    asked by yatin
  39. Chemistry

    Please help verify my answer. Not confident it is right: please verify my answer: Consider the following REDOX reaction: Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb(s) a. Write the oxidation and reduction half-cell reactions. Zn(s) + Pb+2(aq)

    asked by Dexter
  40. Chemistry

    Please help verify my answer. Not confident it is right: please verify my answer: Consider the following REDOX reaction: Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb(s) a. Write the oxidation and reduction half-cell reactions. Zn(s) + Pb+2(aq)

    asked by Dexter
  41. college level math

    on april 30,(day 0) there will ve 2500 lovebugs living in marion county. the number of lovebugs living in marion county will then increase at a rate of 9percent everyday since april 30. a)find the equation for the number of lovebugs living in marion county

    asked by renee
  42. music

    11. Explain how music and culture influence one another. Provide an example of a song or album that affected culture. Provide examples of songs with cultural references?

    asked by Anonymous
  43. health

    Why is it important to consider the components of the social ecology framework in community and public health?

    asked by Anonymous
  44. biology

    in a dihybrid cross, the F2 will have nine genotypes, but only four phenotypes because the _, genes cause the _, traits to mask the _, traits

    asked by nuffy
  45. chemistry(:

    What are these elements listed from most reactive to least reactive? (: thanks bunches!! ((: Mg, Al, Ne, C, H, Cu, Fe, B

    asked by Lisa
  46. Criminology

    America is experiencing a major issue with immigration. What will future criminologists face in studies of crime control based on cultural diversity? How is cultural diversity affecting border patrol and local law enforcement?

    asked by Stacy
  47. exp ofmath

    13/14 + 2/9 reduce answer to lowest terms

    asked by nikki
  48. calculus

    The equation y = x(1/2) + 6 equals the equation y = x(1/3) + 12 at what value of x

    asked by Anonymous
  49. college chemistry

    so i've never used this litmus paper stuff & i totally missed the lab but i still have to answer this question. ** Describe the observation obtained when a piece of litmus paper is immersed in the mixture of two acids? ** These two acids it's talking about

    asked by Kalli
  50. Business Comunication

    A job application letter is different from a resume in that: a.it presents a job candidate's qualification. b.it uses short,parallel phrases and sentence fragments. c.it is adapted to a position rather than to the needs of a particular organization. d.it

    asked by Bar
  51. math

    22 percentage of what is 66

    asked by Anonymous
  52. math

    What is the Prime factorization of 198

    asked by Anonymous
  53. math

    Write 999 as a roman numeral

    asked by Anonymous
  54. Trig

    The graph of y = 7cosx + 24sinx would be a sinusoid if it were plotted. What would be the first positive value of x at which there is a high point?

    asked by Randy
  55. German

    I really need someone to check this short paragraph for me. I'm not a German native speaker and I need to prepare it for tomorrow's language exam. Thank you very much in advance. IT'S URGENT!! Wenn ich an meinen ersten Schultag denke, kann ich bestimmt

    asked by Henry1
  56. math

    does the function f(q)=(q(1-q))^1/2 satisfy the hypothesis of the mean value theorem at the interval [-1,5]

    asked by juan
  57. earth science

    discuss stellar evolution(briefly describe each stage). what forces are opposing one another throughout the life of a star and how do they influence the various stages in the life cycle of a star?

    asked by Stacy
  58. Chemistry / Elements

    if fluoride is considered toxic, then why do they put it in tooth paste and municipal drinking water supplies?

    asked by Jake
  59. algebra

    at 5 p.m., a person 5 feet tall casts a 10-foot shadow. at the same time, a flagpole casts a 40-foot shadow?

    asked by dona
  60. Chemistry

    Brass is an alloy that is approximately 67% Cu and 33% Zn, by mass. How many grams of Cu and Zn are in a brass doorknocker weighing 2.2 pounds?

    asked by Ippy
  61. physics

    when a body which is displaced has not covered any distance

    asked by Anonymous
  62. physics

    please shelp me with this problem what is the stopping potential (V) if the wavelength of the incident light is 400 nm??

    asked by Liz frank
  63. Chemistry

    How can i prepare a solution of 12 g 50% (w/v) NaOH?

    asked by PAnos
  64. GENRAL MATHS

    PROVE THAT (1+COT A+TAN A)(SIN A-COS A)=SEC A\COSEC A-COSEC A\SEC A

    asked by SARADA
  65. LA- Grade 9

    "Something invisible, seeking shelter from the cruel and pitiless vacuum of space." Is an example of: a. metaphor b. personification c. symbolism d. hyperbole Your help is much appreciated !!

    asked by Maddison
  66. math

    What's the force on a mans knees weighing 235 lbs falling from 8' landing on his feet on hard dirt be?

    asked by kevin
  67. physics

    Does the following represent a sample or a population? calories created while burning all of the coal taken from a rail car

    asked by Halima
  68. English

    Can you hel me formulate the first sentence better? Thank you very much. 1) Define the interior monologue providing an example of its use from (is it wrong?) the readings done in class. Explain then in what way it differs from the stream of consciosness.

    asked by Henry1
  69. math

    Convert 367 to Egyptian form

    asked by Anonymous
  70. NU

    a ball is thrown straight upward with some unknow velocity. The ball reaches a maximum height above the launch point of 32m. how fast is the ball movin when it is 8 m above the launch point

    asked by frank
  71. history

    Two ways by which lok sabha can vote for council of ministers by prime minister out of power??

    asked by gauri
  72. Math

    A ball is thrown with an initial velocity of 10 m/s from a height of 2 meters. At what time does the ball hit the ground?

    asked by Ashley
  73. business

    I need assistance in xbis/219 week 8 &9. Is there anyone who can help me?

    asked by Renee
  74. English

    Can you please check these two sentences, again? I had misspelt a noun in my previous post. 1) Define the interior monologue providing an example of its use from the readings done in class. Explain then in what way it differs from the stream of

    asked by Henry1
  75. Intermiediate Algebra

    Factor completely. Remember to look first for a common factor. If a polynomial is prime, state this -4t^2 + 64

    asked by Elisa
  76. Intermediate Algebra

    Factor completely. If a polynomial is prime, state this 9 + 8t^2 - 18t

    asked by Elisa
  77. English

    Can you please check these statements? I'm not sure about the word choice. 1) Explore the theme of the double as it occurs in the works of the writers we studied in class. (I need to change "we studided in class") 2) Describe (I need a synonym) the kind of

    asked by Henry1
  78. college chemistry

    why do halogens tend to form diatomic molecules?

    asked by Elizabeth
  79. Math

    rationalize the denominator 12 over 5 pie 90

    asked by Melissa
  80. persuasive essay

    need help checking grammar errors please and how good is it? Credits cards have some positive value to them from being able to make big purchases, to making an everyday purchase. This reminds me of a quote said by John Mc Donald’s “Everything that has

    asked by mike
  81. college algebra

    A function is given. Determine the average rate of change of the function between the given values of the variable. f(t) = 6/t ; t = a, t = a + h

    asked by Kelley
  82. Chemistry

    (a) A sample of cesium metal reacted completely with water, evolving 48.7 mL of dry H2 at 24°C and 774 mmHg. What is the equation for the reaction? Include states-of-matter under SATP conditions in your answer. Use the lowest possible coefficients. (b)

    asked by Lance
  83. college algebra

    A function is given. Determine the average rate of change of the function between the given values of the variable. f(x) = 6 − x2; x = 1, x = 1 + h

    asked by Kelley
  84. Algebra

    what Is the unpaid balance of this loan at the end of the 10th year if you are buying the home for $250,000 with a Interest rate of 6%?

    asked by Anonymous
  85. hoke county

    o A few minutes later, Susan tells Molly that she doesn’t like their coworker, Karishima, because she can’t understand half of what she says due to her accent. Molly agrees with Susan, and they both begin to laugh about Karishima’s clothing, and how

    asked by larry
  86. physics

    A faucet leaks at the rate of four drops each second.If air resistance is neglected, determine the vertical separation between two consecutive drops after the lower one has fallen 20m

    asked by victor
  87. Negotiations

    Based on the following information below: Listed price of the house-$329,000 Square feet-3600 Rooms -10 Bed rooms -4 finished basement- No Baths -2.5 garages -2 car garage time on the market -6 months miscellaneous-large wooded lot, pantry, all brick

    asked by Lola
  88. English

    I forgot to include the following questions. I really hope you can have a look at them. I need you to improve question 2. Thank you. 1) Define the interior monologue providing an example of its use in the readings done in class. Explain then in what way it

    asked by Henry1
  89. math

    Convert 10010000. To a numeral in base10 2

    asked by Anonymous
  90. westernncilvilization II

    What do these readings tell you about Napoleon’s opinion of the Republic and the Enlightenment ideals which originally informed the course of the Revolution?

    asked by bob
  91. math

    Multiply in indicated base 100 2 X 101 2 ------------

    asked by Anonymous
  92. math

    13% of what number is 26

    asked by Anonymous
  93. chemistry)):

    OMG! I'M SO CONFUSED! Like okay, the question is to write the formulae for the two acids formed when Chlorine is dissolved in water and I like really can't find anything BUT hypochlorous acid but that's just ONE!)):

    asked by tonya((:
  94. math

    if your ranked 59 out of 255 what is the percentage

    asked by taylor
  95. geometry

    The midpoint of mc is G. If AT = 42 and AG = 2x – 5, what is x?

    asked by dave
  96. Intermediate Algebra

    Factor by grouping, if possible, and check 5x3 + 4x2 − 10x – 8

    asked by Elisa
  97. earth science

    how do we calculate or determine the distance to stars? what units do we use and what are the limitations (if any) of the method used for such calculations?

    asked by Stacy
  98. PSYC

    How can a leader balance a spiritual organizational culture without imposing spiritual values on employees?

    asked by MeMe
  99. Definition of Phrase

    Could I know what this phrase means please? ...preferred the privacy of domestic life to the public spotlight.

    asked by Emma
  100. bio 1

    What factors apart from acid rain could be killing trees?

    asked by kozy
  101. software

    what is software?types of software and examples

    asked by Anonymous
  102. HCR/240

    Doing the final putting it all together. Having trouble when I enter the charges and payment transactions it is not showing the insurance information that the patient has. Any suggestions?

    asked by Bonnie
  103. hoke county

    o A few minutes later, Susan tells Molly that she doesn’t like their coworker, Karishima, because she can’t understand half of what she says due to her accent. Molly agrees with Susan, and they both begin to laugh about Karishima’s clothing, and how

    asked by larry
  104. Math

    what percentage of 230 is 34.5

    asked by Anonymous
  105. riddle

    what came first a chicken or an egg..??

    asked by Kim