Questions Asked on
June 21, 2010

  1. chemistry

    what volume (in ML) of a 0.150 M HNO3 solution is required to completely react wtih 35.7 mL of a 0.108 M Na2CO3 solution according to the following balanced chemical equation? Na2CO3(aq) + 2 HNO3(aq) --> 2NaNO3(aq) + H2O(l) then, in the reaction above,

    asked by samantha
  2. chemistry

    what volume (in L) of 0.150 M KCl solution is required to completely react with 0.150 L of a 0.175 M Pb(NO3)2 solution according to the following balanced chemical equation? 2KCl (aq) + Pb(NO3)2 (aq) --> PbCl2 (s) + 2 KNO3 (aq)

    asked by samantha
  3. CHEM

    Calcium nitrate will react with ammonium chloride at slightly elevated temperatures, as represented in the equation Ca(NO3)2(s) + 2NH4Cl(s) ---> 2N2O(g) + CaCl2(s) + 4H2O(g) What is the maximum volume of N2O at STP that could be produced using a 6.80-mol

    asked by JAS
  4. chemistry

    The normal boiling point of acetone is 56.2 (degrees)C and the molar heat of vaporization is 32.0 kj/mol. At what temperature will acetone boil under a pressure of 50.0 mmHg?

    asked by Jim

    A compound containing 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide and water. Which chemical or element will have the largest number of moecules?

    asked by charlie
  6. Math

    A standard deck of cards is made up of four suits with 13 cards in each suit (total of 52 cards). If we randomly sample five cards from a standard poker deck, find the probability that all five cards selected are clubs.

    asked by Jaime
  7. chemistry

    what is the standard enthalpy formation of liquid diethylamine (CH3CH2)2 NH? N2O5(g) + 8CH4(g) ==> 2(CH3CH2)2NH(l) +5H2O(l), delta H= -1103kJ

    asked by Ellie
  8. chemistry

    the molar mass of an unknown gas was measured by an effusion experiment. it took 63s for te gas to effuse. where as nitrogen gas took 48sec. what is the molar mass of the gas? 32g/mol 37g/mol 24g/mol 16g/mol 48g/mol

    asked by Ellie
  9. chemistry

    which probably has the lowest boiling point at 1.0 atm pressure. A) C6H14 B) C3H8 C) C4H10 D) C5H12 E) C2H6

    asked by Jim
  10. chemistry

    Ethyl alcohol (CH3CH2OH) has a heat of fusion of 5.01 kj/mol. How much heat in kj is required to melt 137g of ethyl alcohol.

    asked by Kim
  11. chemistry

    what is the solubility of Ag in water at 0 degrees celcius? what is it for calcium carbonate? and yellow brass?

    asked by Stephanie
  12. 11th grade

    Describe how to find the multiplier for an exponential growth rate of 15%.

    asked by melany
  13. Statistics

    Suppose in a carnival game, there are six identical boxes, one of which contains a prize. A contestant wins the prize by selecting the box containing it. Before each game, the old prize is removed and another prize is placed at random in one of the six

    asked by Jacob
  14. college

    Consider the titration of 50.0 mL of 0.20 M NH3 (Kb=1.8*10^-5) with 0.20 M HNO3. Calculate the pH after addition of 50.0 mL of the titrant.

    asked by Syra
  15. history

    How and why did England avoid the path of absolutism?

    asked by alice
  16. chemistry

    The enthalpy of vaporization at 298 K for diethylether (C4H10C) is 26.0 kj/mol. How much heat would be required to vaporize 1.00 L of the ether at 298 K if its density is 0.714 g/L ? A) 250 kj B) 74.1 kj C) 186 kj D) 130 kj E) 440 kj

    asked by Jim

    Determine a casino's expected net income from a 24-hour period at a single roulette table if the casino's total overhead for the table is $50 per hour and if customers place a total of $7,000 on single-number bets, $4,000 on two-number bets, $4,000 on

    asked by CARMEN
  18. chemistry

    A substance has a heat of fusion of 61.5 kj/mol and a heat of deposition of 167.4 kj/mol. What is 175 heat of sublimation in kj/mol? A) 61.5-167.4 B) 61.5+ 167.4 C) -61.5 D) 167.4 E) 167.4-61.5

    asked by Jim
  19. chemistry

    Earl N. Meyer found that it took 26.54 mL of a 0.0100 M KOH solution to reach the equivalence point for the titration of 25.00 mL of HCL. What is the molarity of the HCL?

    asked by Alisha
  20. chemistry

    Equilibrium is established between Br2(l) and Br2(g) at 25.0 (degrees)C. A 250.0 ml sample of the vapor weighs 0.486g. What is the vapor pressure of bromine at 25.0 (degrees)C, in millimeters of mercury.

    asked by Jim
  21. Trigonometry

    I am trying to help my child out with a problem but yeah I am finding it veyr hard. Gabe is spending two weeks on an archaeological dig. He finds a fragment of a circular plate that his leader thinks may be valuable. The arc length of the fragment is about

    asked by Britt
  22. chemistry

    Given the data below, determine the normal boiling point of COCl2. P1= 100 mmHg T1= -35.6 (degrees)C (delta) Hvap= 27.4 kj/mol

    asked by Jim
  23. chemistry

    Using a value of Ksp = 1.8 x 10-2 for the reaction PbCl2(s) = Pb+2(aq) + 2Cl-(aq). If a solution has a current value of Keq of 1.2 x 10-2, which statement is true?

    asked by Beth
  24. geometry

    One side of a kite is 4 cm less than four times the length of another side. The perimeter of the kite is 59 cm. Find the lengths of the sides of the kite.

    asked by Anonymous
  25. Bio

    The ultimate source of the energy in food ___________________ A)is ATP B)is the sun C)is producers D)is plants E)is consumers

    asked by Joe
  26. Chemistry

    At 700 K, the equilibrium constant for the reaction NO2(g) « 2NO(g) + O2(g) is Kc = 4.79×10-3 (M), and the rate constant for the reaction 2NO(g) + O2(g) ® NO2(g) is k = 3.13×10^3 M^-2s^-1. What is the rate constant for the reaction NO2(g) ® 2NO(g) +

    asked by Miguel
  27. chemistry

    When a 0.5725 g sample of Lysol was titrated with 0.100 M NaOH, and endpoint was obtained at 15.00 mL. What is the percent of HCL in the lysol sample?

    asked by Alisha
  28. college physics

    A current of 2.7 A flows in a straight wire segment of length (2.5 cm) ˆı + (2.5 cm) ˆ in a uniform magnetic field of strength (1.7 T) ˆı . Find the magnitude of the force on the wire.

    asked by essence
  29. Macroeconomics,

    List and explain the three tools used by the Fed to manipulate the supply of money. In each case show how the money supply can increase/decrease.

    asked by mercedes
  30. Math

    {lease help :) A contractor is considering a sale that promises a profit of $20,000 with a probability of .7 or a loss due to bad weather, strikes and such of $3000 with a probability of .3, what is the expected profit?

    asked by Sally

    Maria just inherited $10,000. Her bank has a savings account that pays 4.2% interest per year. Some of her friends recommended a new mutual fund, which has been in business for three years. During its first year, the fund went up in value by 12%; during

    asked by CARMEN
  32. Caluclus

    use implicit differentiation to find dy/dx xlny=y^3=lnx

    asked by Trace
  33. English

    1. What kind of favorite movies do you like? 2. What kind of favorite movie do you like? - I like horror movies. (Are the questions and answer correct? Do we have to use the plural form, 'kinds'?) 3. What is your favorite kind of movies/movie? - 4. It is

    asked by rfvv
  34. business

    I4-1: An inexperienced bookkeeper for the Soggy Ground Construction Company has prepared the following balance sheet. Soggy Ground Construction CompanyBalance SheetFor the Year Ended December 31, xxxx Current Assets Cash $149,500 Accounts receivable (net)

    asked by shirley
  35. chemistry

    How much heat would be relaesed by the condensation of 5.40g of steam at 100 (degrees)C and the subsequent cooling of the water to 25(degrees)C? [(delta)Hvap=40.7 KJ/mol at 100(degrees)C; Cp for H2O(l) is 4.18Jg-1 (degrees)c-1] A) 12.2 kj B) 18.3 kj C)

    asked by Kim
  36. chemistry

    What is the ph of a 0.00100 M HCl solution?

    asked by Alisha
  37. chemistry

    a 47.7L sample of a gaseous hydrocarbon, measured at 1.00atm and 25degreesC is burned in excess oxygen, liberating 4.33X10^3 kJ of heat at a constant pressure. what is the identity of the hydrocarbon?

    asked by Ellie
  38. Statistics

    In a particular chi-square goodness-of-fit test there are four categories and 200 observations. The significiance level is 0.05. How many degrees of freedom are there? What is the critical value of chi-square? compute the value of chi-square?

    asked by Rhonda Moore
  39. Accounting

    Please describe how the following transactions affects the accounting equation: Provide service for cash Increase, decrease of no change from the following accounts Assets, Liability and Owners Equity

    asked by John

    2. Mrs. Carroll and Ms. Howard decide to divide all profits and share all losses using a fixed ratio. If the ratio agreed upon is in proportion to their original investment, what would be Ms. Howard’s share of a $60,000 end-of-year profit? (Hint: The

    asked by Jalisa j
  41. critical thinking crt 205

    Choose from the following three topics from the Opposing Viewpoints Resource Center. Note that there is one article in support and one in opposition listed for each topic. Immigration: Immigration Should Be Restricted. Paul Craig Roberts. Opposing

    asked by ke
  42. chemistry

    a 3.35g sample of solid silver reacted in excess chlorine gass to give a 4.45g sample of pure solid AgCl. the heat given off was 3.95kJ at constant pressure. what is th enthalpy of formation of AgCl?

    asked by Ellie
  43. math

    a tourist in framce wasnts to visit 5 different cities. if the route is ransomly selested what is the probability that she will visit ciites in alphabetical order

    asked by J
  44. algebra

    simplify: sqrt (16)/sqrt (4) + sqrt (2) a) 8 - 2 sqrt (2) b) 8 - sqrt (2) / 2 c) 2 d) 4 - 2 sqrt (2)

    asked by ami
  45. business

    What cues might a manager have that suggest there is a problem with the design of an organization? Is changing an existing organization a different task from designing a new structure?

    asked by Anonymous
  46. NCH

    In most countries a child(start).... school at six and(staying).... for about five years in a primary school. *chia động từ trong ngoặc

    asked by nhi
  47. algebra

    solve: sqrt (m) + 7 = 5 a) (-2) b) none or 0 c) (2) d) (4)

    asked by sean
  48. chemistry

    what is the balanced equation for potassium iodide and solid zinc in an acidic solution

    asked by Anonymous
  49. Math

    An eon of time is defined as 1 billion years (1x10 9yrs) in scientific notation. How long is this in minutes? (Assume 1 year =365.25days.

    asked by Millicent
  50. English

    1. Who weighs more, Mr. Pitt or Emily?. -Mr. Pitt weighs more than Emily. 2. Who is heavier, Emily or Bob? - Bob is heavier than Emily. 3. Who is the tallest of the three? - Mr. Pitt is the tallest. 3. Who is the taller of the two? - Emily is the taller fo

    asked by rfvv
  51. algebra

    simplify the following radical expression: 3 sqrt (-27) a) 0 b) -3 c) 3 d) no solution exists

    asked by ami
  52. Statistics

    Suppose in a carnival game, there are six identical boxes, one of which contains a prize. A contestant wins the prize by selecting the box containing it. Before each game, the old prize is removed and another prize is placed at random in one of the six

    asked by Jacob
  53. math

    As a restaurant owner there are many decisions that you need to make on a daily basis, such as where to keep inventory levels. You wish to replenish your stock of dishes by purchasing 250 sets for your restaurant. You have two dish design from which to

    asked by Ash
  54. Algebra

    Need help with these-- 21. Find the possible values of a, of the distance between the points is 5, and the coordinates are (1, 1) and (4,a) 22. The Pythagorean Theorem works only for _______ triangles. Right? 25. Three sides of a triangle are 2, 4, and 8.

    asked by mysterychicken
  55. Algebra - Math

    The profit function for hang gliding serving p(x) = -0.4x^+fx-m. f- represents set up fee for excursions,m- rental, p- profit, x-# of flights in month. If $40.00 charged for set up fee, and $800.00 rental fee per month. What is the equation for the profit

    asked by Susan
  56. Computer Question

    Does anyone know where I can remove the memory card? from a computer? I tried looking it up but all I get is those memory cards for cameras... I'm not sure what it is, except that it contains computer memory. Also, I remember someone saying that I need to

    asked by Amy~
  57. Shurley English

    I'm having kids who just finished second grade code sentences in their SummerBridge books in the Shurley style. We're having trouble with the word "my." How would this sentence be coded? "Roberto's is my favorite restaurant." Thanks

    asked by Sara
  58. Claculus

    find the equation of the tangent line to y^3-xy=-6 at the point (7,2)

    asked by Trace
  59. math

    the vertices of a figure are w(-2,3), Y(3,1), and z(-3,4). What are the vertices of the transformed image ofter a reflection over the x-axis? can you plz explain to me, how to solove this

    asked by jessica
  60. statistics

    If a major Internet store wants to estimate the percentage of adult Internet shoppers in order to determine the maximum impact of Internet shoppers on its sales, what amount of the shoppers should be used as a sample?

    asked by Trish R
  61. English

    1. The temperature here is of medium. 2. The temperature here is of average. 3. The temperature here is neither low now high. (Would you correct errors?)

    asked by rfvv
  62. English

    1. Who is the oldest? - They are the same age. 2. Who is older, Betty or Tom? They are (of) the same age. (Can we add 'of'? Are the questionsa and answerws right?) 3. Who is heavier, Emily or Mary? 3-1. Both are the same weight. 3-2. They are the same

    asked by rfvv
  63. geometry

    Given: ~ with altitudes CR and ZS. ZS = 12, XY = 15, YZ = 18 and AB = 20, find the measure of CR. (2 points) A) 25 B) 9 C) 17 D) 16

    asked by chris
  64. Government Check

    Out of 56 problems I'm unsure of 7 of them. Can someone please check? (= is my answer. 1.)Which of the following is not an essential element of the English political tradition? a.)Royal absolutism b.)Representation =c.)Limits to the power of the king

    asked by Ariel
  65. Math

    A perfume company wants to dispense 57.3 quarts of a new fragrance into small vials. How many 25mL vials can they fill (rounded to the nearest full vial)

    asked by Shanda
  66. Macroeconomics,

    If nominal GDP is $300 billion and the money supply is $20 billion, What must be the velocity? (b)If the money supply decreases and the velocity does not change, what will happen to nominal GDP?

    asked by mercedes
  67. Business

    Sales of a product are influenced by the salesperson’s level of education and gender, as well as consumer income, ethnicity, and wealth. a. Formulate this statement as a multiple regression model (form only, without parameter estimation). b. Specify

    asked by Anonymous
  68. math

    1. Consider the following equation. xy + 7x + 5y = –8 (a) Differentiate both sides with respect to x to complete the following. ( blank )y ' + y + blank =0 (b)Solve for y ' in terms of x and y. (c) Calculate dy/dx at the point (4,-4). Can anyone help me

    asked by Diana
  69. pre-calculus

    Prove 3+4+5+...+(n+2) = [n(n+5)]/2 for n>4 Do the first step in a proof by induction.

    asked by James
  70. algebra

    simplify: sqrt 2/7 a) sqrt (7) b) 2 c) sqrt (2) d) sqrt (14) / 7

    asked by sean
  71. Computer

    Does anyone know of a website where I could ask computer problems for free? I just tried asking on this one website, but it wanted me to pay... Thanks

    asked by Amy~
  72. algebra

    julian owns an ice cream parlor. for pricing purposes he need to kno how much ice cream a waffle cone holds. the cone is 5 1/2 inches deep and has a diamete of 3 inches. whatis the volume of the waffle come..round to the nearest tenth is neccesary

    asked by alanaxoxo
  73. HCA 210

    I am having trouble figuring out how to write a proposal for a new health care system. Any tips on how to write a proposal?

    asked by Mari
  74. Algebra - Math

    y=3x-x2 use the values of y provided in the table x y -1 0 1 2 3 4 Place your graph(s) here

    asked by Susan
  75. college

    A company is considering the purchase of a forest that is estimated to yield an annual return of $50,000 for 10 years, after which the forest will have no value. The company wants to earn 8% on its investment and set up a sinking fund to replace the

    asked by Gibbons
  76. art-please help

    I have spent a lot of time researching and I can't find this. I wrote a paper about the mona lisa and the last supper. I need a sentence from each that tells how they reflect or define the dadaism period. Can someone please help with one or point me in the

    asked by crystal
  77. chemistry

    Silicon oils are used in water repellents for treating tents, hiking boots, and similar items. Explain how they function.

    asked by Jim
  78. business

    Nataly works in a Young Womens Fasions ia department store. Within this department she specializes in knitwear. This is a example of which of the following departamental schemes? Product,customer or Custumer,Product.

    asked by Rosanna
  79. Math

    If a tank of water is leaking at a rate of 9.32mL/sec, how fast is this rate in L/hr?

    asked by Shanda
  80. PSY 230

    Psy 230 Personal Narrative

    asked by Brenda
  81. Macroeconomics,

    If nominal GDP is $300 billion and the money supply is $20 billion, What must be the velocity? (b)If the money supply decreases and the velocity does not change, what will happen to nominal GDP?

    asked by mercedes
  82. Statistics

    A driving machine was employed to hit a sample of 41 each of two different brands of golf balls using the same force each time. The research team measured the distance between the point of impact and where the ball eventually came to rest on the ground.

    asked by Randi
  83. grammar

    Is this a comma splice or is it correct? I think it is correct.

    asked by The more I know about you, the better I like you.
  84. sociology

    Culture at Wal-Mart on pg. 68. Western companies often impose western culture on the country in which the business is launched. Locate an article that contains a similar situation as Wal-Mart and summarize the findings. What is your analysis of the

    asked by Anonymous
  85. accounting

    Why does the source document discloses information about the consumers?

    asked by ^Tasha
  86. chemistry

    True or False CH4 probably has a lower boiling point than SnH4

    asked by Kim
  87. pre algebra

    tom rests a 32-foot ladder against the wall the ladder forms a 61degrees angle with the ground. how high up the wall is the ladder?

    asked by lavena

    The Civil War and its impact on the District in the late 19th century... Help Please I'm writing an essay and i need info!

    asked by Brittany
  89. pre algebra¢¾

    julian owns an ice cream parlor. for pricing purposes he need to kno how much ice cream a waffle cone holds. the cone is 5 1/2 inches deep and has a diamete of 3 inches. whatis the volume of the waffle come..round to the nearest tenth is neccesary

    asked by lavena
  90. economics

    What effects will this change have on the exchange rate of the canadian dollar in terms of the us dollar? Good Canadian real estate market sends a signal to American construction companies.

    asked by Ariza
  91. math

    15th October 2007 is on Monday.Which day is on 15th October 2008?Find in the form of arithmetic progression.

    asked by Nash
  92. math

    Consider the function defined below. y = 2t3 - 4t2 + 3 (a) Calculate the second derivative. y '' = (b) Calculate the third derivative. y ''' =

    asked by Jack
  93. math

    A refrigerator has a width of 3 feet. The angle of elevation from the bottom corner to the opposite corner 65 degreeswhat is the height of the refrigerator.

    asked by joe wallace
  94. Law

    Joe Researcher asks for access to patient records as part of a research project. What should the health information manager do? A. Say yes—access for research is permitted. B. Say no. C. Tell Joe to submit his request to an institutional review board if

    asked by Anonymous
  95. Com220

    Measuring the quality of care is essential to being able to identify which areas of patient care need improvement. A positive patient outcome is one measure of quality. What role do health care workers play in determining quality care?

    asked by Heidi
  96. math

    I'm trying to help my child with this problem.. 1.A bird is flying around the world at a rate of 12.2ft/sec. How many days will it take to complete its journey? (circumference of earth=25,000 miles. 2. A deep space probe is traveling at a velocity of

    asked by Amina
  97. To "lavena" or "jessica" or "alanaxoxo" or whoever

    Please post in one name only. If you continue musical names, you could be setting yourself up for banishment.

    asked by Writeacher
  98. Macroeconomics,

    Is NAFTA good/bad for American? What should the Obama Administration do about it?

    asked by mercedes
  99. Macroeconomics,

    Having a strong or a weak dollar, which is better for America? Why?

    asked by mercedes
  100. English

    Those familiar with the story Animal Farm Please help me come up with a thesis for the prompt: Napoleon Continues to announce new rules that seem less than desirable. The animals seem confused and somewhat annoyed, yet none protest or dare to speak the

    asked by Lolerskater
  101. bio

    what is behaviral isolation

    asked by john
  102. algebra


    asked by Anonymous
  103. anatomy

    (a) what are some of the physiology effects of infusing 500ml 0.9% glucose intravenously over an hour. (b)what are some of the physiology effects of infusing 500ml 5% glucose intravenously over an hour.

    asked by secret
  104. Calculus

    Find the derivative. y = ln(x^4 + 6x + 7) y '(x) =

    asked by Daisy
  105. algebra


    asked by Anonymous
  106. Communication and Gender Studies

    How does the language we use, including the actual words that we have to name and describe things build our stereotypes?

    asked by Audrey
  107. history

    The impact of segregation in washington dc after the civil war. were can I find information?

    asked by Isaiah
  108. Math

    If a satelite orbits the eart at a velocity of 7.5x10 6 km/hr, (in scientific notation) this would be the same as how many ft/s?

    asked by Millicent
  109. Lynn

    What are some pros and cons of using each of the following methods when solving equations? -graphing -using substitution or elimination I hope to gain additional thoughts on this, thanks.

    asked by Math (Algebra)
  110. Biology

    another way to word: the effects of temperature on human and fungal amylase

    asked by Kelly
  111. english

    write a review of his theme, along with how this poem relate to your own life experience. I will arise and go now, and go Innisfree, And a small cabin build there, of clay and wattles made: Nine bean-rows will I have there, a hive for the honey-bee, And

    asked by mercedes
  112. Algebra - Math

    Use a table to find at least 3 points using any value for x? y=2x-5 x y -1 1 3

    asked by Susan
  113. psychology 230

    describe how one of the theories from the big five might explain the evolution of your personality.

    asked by sallie
  114. math


    asked by mr
  115. english

    make sentences with words starting with alphabet a-z

    asked by simi