Questions Asked on
July 30, 2013

  1. Chemistry

    Butyric acid (HC4H7O2) is a weak acid with the stench of rancid butter 1.) write the equation for the dissociation of HC4H7O2 in water 2.)the pH of .5 M HC4H7O2 is 2.56 calculate Ka of butyric acid 3.) Write the equation for the hydrolysis of C4H7O2- 4.)

    asked by Ashley
  2. physics

    The Eiffel Tower is a steel structure whose height increases by 19.5 cm when the temperature changes from -9 to +41 oC. What is the approximate height (in meters) at the lower temperature?

    asked by cammy
  3. Chemistry

    3.91 mol of magnesium and 3.91 mol of hydrochloric acid are reacted, how many grams of magnesium chloride will be produced?

    asked by Oliver
  4. physical

    A box slides downwards at a constant velocity on an inclined surface that has a coefficient of friction uK = .58 The angle of the incline, in degrees?

    asked by Sam
  5. Physics

    a cylinder of gas is at a room temp (20 c) the air conditioner breaks down and the tempture rises to 58c what is the new pressure of the gas relative to its initial pressure?

    asked by Dee
  6. physics

    (a) A solar collector is 12.0% efficient in gathering solar energy and converting it to heat. If the average intensity of sunlight on one day is 700 W/m2, what area(m^2) should your collector have to gather energy at the rate of 150 W? (b) What is the

    asked by Justin
  7. chemistry

    O2, Oxygen, has a boiling point of 90K (-183°C), and nitrogen, N2, has a boiling point of 77K (-196° C). Which is a liquid and which is a gas at 80 K (-193°C)?

    asked by Anonymous
  8. chemistry

    when one gram of water solidifies to ice 333.33 j of heat is evolved. calculate enthalpy of fusion of ice?

    asked by gopal
  9. physics

    How many times a minute does a boat bob up and down on ocean waves that have a wavelength of 43.0 m and a propagation speed of 5.25 m/s?

    asked by Justin
  10. Physics

    A simple pendulum consists of a ball connected to one end of a thin brass wire. The period of the pendulum is 1.45 s. The temperature rises by 142 C°, and the length of the wire increases. Determine the change in the period of the heated pendulum.

    asked by Jeanne
  11. Chemistry

    Consider the following reaction and select the false statement below. NaI + 3HOCl → NaIO3 + 3HCl A. HOCl is the oxidizing agent B. Cl is reduced C. NaI is the reducing agent D. If ΔG° for the reaction is < 0, then NaI is a stronger reducing agent than

    asked by Nat
  12. physics

    A simple pendulum consists of a ball connected to one end of a thin brass wire. The period of the pendulum is 2.15 s. The temperature rises by 133 C°, and the length of the wire increases. Determine the change in the period of the heated pendulum.

    asked by hurtle
  13. Discrete Mathematics

    When a theater charges $50 per ticket, a sold-out crowd of 600 will buy tickets. For every $5 increase in ticket price, 6 fewer people buy tickets. What ticket price would maximize the theater’s revenue? (Recall that revenue = price • quantity).

    asked by Joy
  14. math

    The longer leg of a right triangle is 3 more than the shorter leg. The Hypotenuse is 6 more than the shorter leg. If the perimeter of the triangle is 36, find the length of each side of the right triangle. [ Only an algebraic solution will be accepted ]

    asked by vincent
  15. psychology

    In the brain, most excitatory communication in synapses occurs by way of glutamate and most inhibitory communication occurs by way of gamma-aminobutyric acid. In general terms, describe what the other neurotransmitters do.

    asked by ana
  16. Discrete Mathematics

    If f(x) = log2 (x - 2)3 and g(x) = log8 (x - 2), when is (f + g)(x) = 0?

    asked by Joy
  17. Analytical chemistry

    A 25 ml sample of household bleach was diluted to 500 ml in a volumetric flask. An unmeasured excess of potassium iodide was aded to a 20 ml aliquot of the diluted sample; the iodine liberated in the reaction: OCl- + 2I- -> I2 + Cl- + H2O required 34.5 ml

    asked by Gloria
  18. sociology

    8. Which of the following social structures is NOT reflected in the act of a wife adopting her husband’s name and foregoing her father’s (her maiden) name? Patriarchy, Heteronormativity, Hierarchy,Classism

    asked by Anonymous
  19. chemistry

    Volume of distilled water used 12.09 mL Volume of HCl added 0.87 mL Concentration of added HCl 1.979 M pH of diluted HCl solution ___________________

    asked by faruk
  20. english

    Instructions in procedural texts should appear in the form of __________. a. descriptive phrases with adjectives b. commands with active verbs c. questions and answers d. complex sentences and paragraphs

    asked by laura_chavez
  21. math

    The length of a rectangle is three times the length of a side of a square and the width of the rectangle is two less than the side of the square. If the perimeter of the rectangle is twenty eight more than the perimeter of the square, find the length of a

    asked by vincent
  22. math

    Mary has a monthly salary of $1,200. She spends $240 per month on food. What percent of her monthly salary does she spend on food?

    asked by Anonymous
  23. physics

    Show that 60.0 L of gasoline originally at 15.0ºC will expand to 61.1 L when it warms to 35.0ºC, how much gasoline has spilled by the time they warm to 35.0ºC ?

    asked by Justin
  24. math

    Jaden bought a large pizza to share with his friend . the pizza was cut into 10 pieces . Jaden ate 4/7 of the pizza but had to stop because he was to full .His friend ate 3/8 of the pizza and decided to save the rest of his pizza for later. How much of the

    asked by Anabelle
  25. physics

    The latent heat of fusion for water is 33.5 × 104 J/kg, while the latent heat of vaporization is 22.6 × 105 J/kg. What mass m of water at 0 °C must be frozen in order to release the amount of heat that 2.32 kg of steam at 100 °C releases when it

    asked by damon
  26. Discrete Mathematics

    Jen is thinking of a particular number. Which rational function would represent the sum of twice her number and three times the reciprocal of her number?

    asked by Joy
  27. Discrete Mathematics

    The population of rabbits in a particular habitat triples every year. If there are 500 rabbits in 2013, when will there be over 100,000 rabbits?

    asked by Joy
  28. Physics

    A uniform beam of length L = 7.80 m and weight 4.05 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam. (Sam is 1m from one end of beam and joe is 2m from the opposite end.)

    asked by Jamie
  29. Discrete Mathematics

    Which of the following scenarios could be described by the real valued function f(x) = x3 + 3x2 + 2x? A shoebox has a length that is 1 inch longer than its width and a height that is 1 inch longer than its length, We want to know the product of three

    asked by Joy
  30. Math - probability!

    a club has 15 members plus their president. a 5 person committee is to be formed. A) how many committees include the president? B) how many committees don't include the president? C) how many committees altogether?

    asked by kristen
  31. math

    Number of cubic inches in volume of cube, Number of square inches in surface area of cube. which one is greater or equal?

    asked by vincent
  32. Discrete Mathematics

    Consider the following table of values for real valued functions f(x) and g(x). x 1 2 3 4 f(x) 3 1 4 2 g(x) 4 1 3 5 Find f o g(1) where o denotes function composition.

    asked by Joy
  33. Math

    How do i find surface area of a rectangular prism?

    asked by Alyssa
  34. Math

    John currently has a square garden. He wants to redesign his garden and make it into a rectangle with a length that is 3 feet shorter than twice its width. He decides that the perimeter should be 60 feet. Determine the dimensions, in feet, of his new

    asked by Kimberly
  35. physics

    What is the wavelength (m)of an earthquake that shakes you with a frequency of 11.5 Hz and gets to another city 85.0 km away in 12.0 s?

    asked by Justin
  36. chemistry

    You weigh a sample of a monoprotic unknown acid and dissolve it in 50.00 mL of distilled water. Exactly half of this solution is titrated with Sodium Hydroxide to the phenolphthalein end point. The pH of the other half of the original solution is measured

    asked by faruk
  37. Grammar

    the external oblique fascia was then incised and the incision was lengthened in the direction of the fibers.

    asked by Anonymous
  38. chemistry

    You weigh a sample of a monoprotic unknown acid and dissolve it in 50.00 mL of distilled water. Exactly half of this solution is titrated with Sodium Hydroxide to the phenolphthalein end point. The pH of the other half of the original solution is measured

    asked by faruk
  39. child psychology in general

    the moralizer sees children as initially ? a.sheltered b.good c.bad d.deprived my answer is c

    asked by susue
  40. statistics

    It is claimed the average age of employee in a large company is 50. A sample of 36 employees is taken and the average age was 49. The standard deviation of the population was 5. Use a level of significance of .05. What do you think of this claim?

    asked by Tom
  41. english

    Change correct the following sentences for subject-verb agreement tense and fragments. Going home now, how I wish I could get there before it start to rain.

    asked by Anonymous
  42. Discrete Mathematics

    A 24 pack of soda costs $8 each and bags of chips cost $6 each. You have $120 to spend and there is a 16 items or fewer fast lane open. How many sodas should you purchase to spend all the money and be able to use that fast lane?

    asked by Joy
  43. physics

    A U.S quarter is rolling on the floor without slipping in such a way that it describes a circular path of radius R=4 cm. The plane of the coin is tilted at an angle of θ=45∘ with respect to the horizontal plane (see the figure below). Find the coin's

    asked by Steven
  44. english

    the next paragraph :) And thank you soooo much for helping me! Now we wanted to answer the research questions. We will have a closer look to the complements and try to find answers why which verb takes which complement. The verb to smell took mostly Noun

    asked by Minnie
  45. Discrete Mathematics

    You put $1,000 into your bank account with a 5% annual interest rate compounded quarterly. How much money will you have after three years?

    asked by Joy
  46. Math

    A spherical balloon has a circumference of 10 inches. If it expands to twice the volume, what happens to its surface area?

    asked by Anonymous
  47. geography essentials

    Upon the fall of Constantinople to the Ottoman Empire in 1453, _______ was seen as the true inheritor of the Christian realm.

    asked by Anonymous
  48. Business

    Explanation of economic, social, political and ethical issues.

    asked by Juanita
  49. math

    (1/2)X - (1/2)Y = 4 1. Slove for X 2. Slove for Y not just an answer please

    asked by vincent
  50. Discrete Mathematics

    7. Which of the following scenarios could be described by the real valued function f(x) = x3 + 3x2 + 2x?: * A. A shoebox has a length that is 1 inch longer than its width and a height that is 1 inch longer than its length. B. We want to know the product of

    asked by Joy
  51. Discrete Mathematics

    3. A tutoring site wants to see how time spent studying for its content exams affects the ultimate scores. It asked its finite math test takers how much time they spent studying for the exam and compared that data against the final scores out of 60 points.

    asked by Joy
  52. Statistics

    There are two boxes, each with several million tickets marked “1” or “0”. The two boxes have the same number of tickets, but in one of the boxes, 49% of the tickets are marked “1” and in the other box 50.5% of the tickets are marked “1”.

    asked by Pebbles
  53. Writing

    Please grade my ACT writing test on a scale of 1-6. Please make corrections and give me feedback. By the way, I wrote this essay in 30 minutes. ACT Test Prompt: Schools in some states have changed their school calendars so that they are now year-round

    asked by Anonymous
  54. English grammar

    please help me to correct my english grammar the letter below.. I mr. Maria lopez bonafide borrrower of housing loan through pag ibig corporation.Miss rowena loren is my authorized SPA, but because of the job opportunity and she is hired to in hongkong and

    asked by jessie
  55. chemistry

    what is the concentration of Fe3+ and I- afforded by dissolving 0.200 mol of iron (iii) iodide in a 725mL water beaker

    asked by Anonymous
  56. child psychology in general

    which one of the following words is most directly associated with the learning theory? aconservation b.programmed c.oedipal d.environmental my answer is b

    asked by susue
  57. Analytical chemistry

    A 5ml portion of table wine was diluted to 100 ml in a volumetric flask. The ethanol in a 20 ml aliquot was distilled into 100 ml of 0.05151M K2Cr2O7. heating completed oxidation of the alcohol to acetic acid: Ch3Ch2OH + 2Cr2O7(2-) +16H(+) -> 3Ch3COOH +

    asked by Gloria
  58. algebra

    10x^(6), 50x^(4) what is the LCM

    asked by chelsea
  59. physics

    A ball of mass 8 kg is thrown vertically upward from the ground , with an initially velocity of 25 m/s. Determine the maximum height to which it will travel if atmospheric resistance is neglected.

    asked by SPD
  60. Business Communications - English 101

    below is a letter we must highlight and correct. It has 14 errors. Could you please review?? I wasn't certain if I should put enclosure(s). Date Mr. Daniel G. Sothern 674 Dunstan Street Dallas, TX zip Dear Mr. Sothern Our client, Sidney Moss, executor for

    asked by marybeth
  61. Physics

    Use the PV diagram of a system. The units for P and V are atmospheric pressure atm and liter L. Process A to B and B to C are straight lines on it. How much is the work done by the system from A to C in J? Given these coordinates:(volume on the x, pressure

    asked by Andrew Katz
  62. Javascript

    I'm trying to write a script that will allow a user to enter a year and then determine if the year is a leap year. I need to include a form with a single text box where the user can enter a year. I also need to display and alert dialog box to the user

    asked by pep
  63. Discrete Mathematics

    There are two plans for renting a car. Plan A charges $10 per day plus a $50 one-time fee. Plan B charges $15 per day plus a $30 one-time fee. How many days must you rent the car for Plan A to be a better deal than Plan B?

    asked by Joy
  64. algebra

    The Domain of the function f(x) = [ (a, b) ( c, d) (e, f) (g, h) ] is:

    asked by dayana
  65. science

    ) A body with an initial velocity of 5ms‾¹ accelerate uniformly at the rate of 16 cm s‾² over a distance of 200 m. Calculate: (i) the acceleration in m s‾² (ii) its final velocity in m s‾¹

    asked by pia
  66. english

    Need Help.Please and Thanks. Read each of the following topic sentences, create your own topic sentence that expresses something about your particular opinion on the subject. 5.Plants require water, sunlight, and carbon dioxide to live.

    asked by Carlos
  67. child psychology in general

    to say that formal theories are comprehensive means they ? a.have been tested on a large number of children b.are widely accepted in the field c.explain the reasons for behaviour d.encompass many different aspects of behaviour and development my answer is

    asked by susue
  68. science

    If a rock has a speed of 12 m/s as it hits the ground, from what height did it fall, assuming its initial speed was zero? Its mass is 50 kg.

    asked by lesly
  69. Science

    For example HNO2 + H20 ----> H30+ NO2- I don't understand how the hydronium ions form. How do I figure out if a OH- or H30+ will form from the reactant side.

    asked by Jeff
  70. Critical Thinking

    What assumptionss should you be aware of to ensure that they did not interfere with crital analysis.

    asked by Leslie
  71. solid mechanics

    A hollow cylindrical steel tube of 3.8 cm external dia & 2.5 thick is used as a column of 2.3 m long with both ends hinged. Determine the safe load by I.S Code.

    asked by ripon
  72. environment

    Compare and contrast the advantages and disadvantages of implementing ANSI/AIHA Z10 versus OSHA’s VPP program.

    asked by boone
  73. math

    What were the total dollar sales of sundaes from the previous question

    asked by jada
  74. social studies

    Is this answer right? my answer has ( ) around it The first fully developed American factory system emerged in the _______ industry. A. iron B. distilling C. sugarcane (D). textile

    asked by carolyn
  75. accounting

    Both Mr. Jones and Mrs. Green earned $50,000 gross in 2009. Yet, Mr. Jones owed IRS $600 on his tax return while the IRS owed Mrs. Green $600 on her tax return. ◦What do you think were the possible reasons for the difference in the results? Explain.

    asked by Anonymous
  76. Grammar

    Thus, Vlad [could, and did, refer]to himself as "Dracula" and even signed official documents with that sobriquet. A. NO CHANGE B. could, and did refer C. could and did, refer D. calls and refers The answer key says: If you look at (C) and (D), you will see

    asked by Anonymous
  77. Discrete Mathematics

    Jen is thinking of a particular number. Which rational function would represent the sum of twice her number and three times the reciprocal of her number?

    asked by Joy
  78. Discrete Mathematics

    You put $1,000 into your bank account with a 5% annual simple interest rate. How much money will you have after three years?

    asked by Joy
  79. Discrete Mathematics

    16. What is the value of a that would make the matrix equation true?: ( 1 -2) (-5 6) (a b) ( 3 4) (7 -8) = (c d)

    asked by Joy
  80. child psychology in general

    in conducting experiments to test scientific theories,exceptions? a.can be triggered if they are few in number b.tend to be disproved or substantially weaken the theory and must be reported c.are included to increase the power of the theory d.suggest that

    asked by susue
  81. Discrete Mathematics

    What is the value of a that would make the matrix equation true? (1 -2) (-5 6) = (a b) (3 4) (7 -8) = (c d)

    asked by Joy
  82. statistics

    In a poll of 700 selected people in the USA who are 50 years or older, 20% said they would prefer a complete overhauling of the social security system. Estimate the population proportion of the USA of 50 years or older who would prefer a complete

    asked by Tom
  83. Discrete Mathematics

    A tutor website wants to see how time spent studying for its content exams affects the ultimate scores. It asked its finite math test takers how much time they spent studying for the exam and compared that data against the final scores out of 60 points. It

    asked by Joy
  84. Discrete Mathematics

    15. The augmented matrix A represents a system of three real-valued equations in three unknowns. Which of the answer choices would result from the usual first step of applying Gauss-Jordan elimination? A = (1 4 2 3) A = (2 9 13 18) A = (3 10 8 15)

    asked by Joy
  85. MATH

    what does 53/56 simplify to

    asked by Anabelle
  86. math

    it is claimed that the average age of employees in a large company is 50. a sample of 36 employees is taken and the average age was 49. the standard deviation of the population was 5. use a level of significance of 0.5. what do you think of the claim?

    asked by marissa
  87. Discrete Mathematics

    The augmented matrix A represents a system of three real-valued equations in three unknowns. Which of the answer choices would result from the usual first step of applying Gauss-Jordan elimination?

    asked by Joy
  88. analytical chemistry

    How many grams of H3BO3 and mL of NaOH (with concentration 0,1M) should you add, to get a 500mL buffer, with pH 9. pKa=9,236

    asked by Maria
  89. Math (Combinatorics)

    How many ways to rearrange 9 a's, 2 b's, and 2c's so that we never see bc and both b's always appear before both c's?

    asked by andy
  90. chemistry

    why do we add anhydrous ether to organic mixtures?

    asked by Anonymous
  91. Discrete Mathematics

    You borrow $100,000 for a conventional 30 year mortgage at a 4% interest rate. Which is the first year, where years are 1-30, where you will pay more principal than interest?

    asked by Joy
  92. child psychology in general

    a child is most apt to become maternally deprived if his or her mother is? a.abusive b.incompetent c.over protective d.absent my answer is d

    asked by susue
  93. medical billing

    need the icd 9 diagnosis code and ms drg along with the icd 10 and icd 10 pcs codes what code is assigned for a patient admistted for azathioprine I drug induced aplastic anemia the patient has peripheral neuropathy of multiple joints of the lower

    asked by Anonymous
  94. health & safety

    Serious violations were issued citing 29 CFR 1910.252(a)(2)(iii)(B) and 1910.252(b)(2)(i)(A). Using the PDCA framework, develop a plan that will correct the deficiencies and ensure that the violations do not recur.

    asked by devon
  95. Math

    Pat must pay a 6 percent state sales tax and a 2 percent city sales tax on school supplies. If the price of the supplies tax before taxes is $30.00, what is the total amount tha Pat must pay In Sales tax? A $0.25 B $0.90 C $1.80 D $2.40 E $2.60

    asked by Anonymous
  96. Scholarships

    Please post links for high school scholarships.

    asked by Anonymous
  97. Persepolis - the harem of Xerxes

    I can not find any information to tell me what the Harem of Xerxes revealed/told us about Perespolis or Persians ????

    asked by Persepolis help
  98. Discrete Mathematics

    You expect to receive payments of $1,000 at the end of the next three years with an annual interest rate of 5%. How much is the money worth today?

    asked by Joy
  99. Math

    Eric swam 200 meters in 2 minutes 5 seconds. What was his speed in meters per second

    asked by Shantiah
  100. math

    Alex wants to cover a 30 by 30 board perfectly with 450 1 by 2 dominos. He also wants to ensure that he can trace a path between any 2 dominos that connect through at most N dominos. What is the minimum possible value of N which would allow Alex to form

    asked by Anonymous
  101. applied physics

    incline plane numerical

    asked by palwasha
  102. math

    evalute 325 times 672

    asked by nathalia
  103. algebra 1

    i need help in linear inequalities

    asked by Anonymous
  104. Math

    1300cm2=_____ m2

    asked by Mandy
  105. child psychology in general

    psychological theories see childrens behaviour as primarily? a.goal oriented b.instinctive emotion triggered d. constant my answer is c

    asked by susue
  106. math

    How many strings of length 13 can be formed from 9 1's, two ('s and two )'s such that the substring () never occurs, and for k=1,2, we see k('s before k)'s?

    asked by Anonymous