Most popular questions and responses by Molly
  1. US History

    How did the spoils system affect president James Garfield and his successor Chester A. Arthur??

    asked on March 29, 2018
  2. chemistry characterization & analysis of aspirin

    write a balanced equation that describes an acid base reaction that would allow you to determine the moles of aspirin present in a sample

    asked on November 13, 2012
  3. physics

    true or false If a net force acts on an object, the object's speed will change. An object's velocity will change if a net force acts on the object. If two object have the same acceleration, they are under the influence of equal forces. The net force which

    asked on October 4, 2010
  4. algebra

    Which inequality represent the following eight fewer than a number is at least sentence 20 answers are. X-8>20. 8-X>20, x+8

    asked on February 21, 2014
  5. Physical Science

    What volume would 90g occupy?

    asked on September 7, 2014
  6. English

    The feeling that things weren't as good as they seemed is described best by which image in Borders

    asked on December 23, 2015
  7. science

    A bus makes a trip according to the position–time graph shown in the illustration. What is the average acceleration (in km/h2) of the bus for the entire 3.5-h period shown in the graph?

    asked on September 14, 2015
  8. Physics

    Two point charges are located on the y axis as follows: charge q1 = -2.50nC at y1 = -0.700m , and charge q2 = 3.30nC at the origin (y = 0). What is the magnitude of the net force exerted by these two charges on a third charge q3 = 9.00nC located at y3 =

    asked on September 7, 2014
  9. Chemistry

    PCl5 --> PCl3 + Cl2 (Kp = 630 at 546 K) A system is prepared by placing equimolar amounts of the three gases shown in the equation above in a suitable rigid container held at constant volume. Equilibrium is established at 546 K. (A) When equilibrium is

    asked on April 25, 2011
  10. algebra

    Show all steps solve the problem evaluate the expression for given value of variable|-4b-8|+|-1=b2|+2b3:b=-2

    asked on February 19, 2014
  11. Math

    A man on the 8th floor of a building sees a bucket (dropped by a window washer) pass his window and notes that it hits the ground 1.5s later. Assuming a floor is 12ft high (and neglecting air friction), from which floor was the bucket dropped?

    asked on October 7, 2013
  12. Chemistry

    can you please please help me with these questions I don't know how to do any of them. I know how to calculate moles and grams and mole ratio,etc but I don't understand the limiting excess reactant and yield stuff. Thanks! 1.In the following chemical

    asked on October 2, 2016
  13. english

    what is the analogy for monkey if cardinal is to bird as monkey is to?

    asked on January 24, 2012
  14. Math

    Let V be the volume of a pyramid of height 15 whose base is a square of side 5. Part a). Use similar triangles to find the area of the horizontal cross section at a height y. Part b). Calculate V by integrating the crosss-sectional area.

    asked on July 9, 2013
  15. chemistry

    Hello, I was confused on this chemistry problem and I was wondering if someone could please help me. 1) Consider the following chemical reaction: 2CH3OH(I) + 3O2 (g) → 2CO2(g) + 4H2O(I) Calculate the number of moles of CO2 produced when 11.25 mL of

    asked on February 19, 2017
  16. chemistry

    3960 J of heat are added to a 27.6 g sample of iron at 25 ◦ C. What is the final temperature of the iron? The specific heat of iron is 0.449 J/g · K. Answer in units of K

    asked on September 2, 2012
  17. algebra

    The equation y-100x=2000 can be used to represent monthly salary of a salary of a salesman ,y when he sells x computer system what is the salesman monthly salary if he sells no computer. Answers are 20, 100, 2000, 2100 thank you

    asked on February 20, 2014
  18. algebra

    Which graph best represent following expression|x-1|>2

    asked on February 26, 2014
  19. algebra

    Which equivalent form following equation 2x-3y=3 need help doing test thank you

    asked on February 19, 2014
  20. Finite

    Assume that the test has 5 true/false questions, and 10 multiple choice questions (4 options per questions), each with exactly one correct answer. If a student guesses randomly on each question, what is his expected score? .5*5+10*.25 5/15?

    asked on October 10, 2016
  21. chemistry

    what is the effects of NH3(aq) and HCl(aq) on the CuSO4 or NiCl2 solution

    asked on February 28, 2012
  22. Physics

    A charge q1 = 5.00nC is placed at the origin of an xy-coordinate system, and a charge q2 = -2.00nC is placed on the positive x axis at x= 4.00cm . If a third charge q3 = 6.50nC is now placed at the point x= 4.00cm , y= 3.00cm find the x and y components of

    asked on September 7, 2014
  23. Chemistry

    Which of the following equations is balanced correctly? A. 2 C3H3 + O2 → 2 CO2 + H2O B. Cl2 + 2 KBr → KCl + Br2 C. 3 H2O → H2 + 3 O2 D. 2 C2H2 + 5 O2 → 4 CO2 + 2 H2O Can anyone help me figure out which is balanced correctly?

    asked on April 28, 2018
  24. Chemistry

    C7H6O3+CH3OH→C8H8O3+H2O In any experiment, 1.50g of salicyclic acid is reacted with 11.20g of methanol. The yield of methyl salicylate, C8H8O3, is 1.31g. What is the percent yield? From my understanding the equation is already balanced, correct? My

    asked on April 14, 2010
  25. algebra

    To which set of numbers does the number belong-55 answers are, Natural, whole, integers, irrational

    asked on February 21, 2014
  26. College Chemistry

    Calculate the vapor pressure of a solution of 0.39 mol of cholesterol in 5.4 mol of toluene at 32oC. Pure toluene has a vapor pressure of 41 torr at 32oC.

    asked on November 19, 2010
  27. Physics. Please!!

    If the force on the tympanic membrane (eardrum) increases by about 1.50 N above the force from atmospheric pressure, the membrane can be damaged. When you go scuba diving in the ocean, below what depth could damage to your eardrum start to occur? The

    asked on November 30, 2007
  28. Social Studies

    1. Why did Xerxes want to conquer Greece? a. to increase his country's wealth b. to win glory c. for revenge d. all of these** 2. Xerxes was king of a. Athens b. Persia** c. Delos d. Crete 3. The Greeks won the Battle of Salamis because their ships a.

    asked on November 13, 2017
  29. algebra

    Need help for a test show all steps to solve problem evaluate the expression for given value of variable. -(4h-1) line is under 4h-1 under line is|th then it is ;h=2 can't text back on kindle don't have a button to reply thank you

    asked on February 19, 2014
  30. Trigonometry

    A hill in the Tour de France bike race has a grade of 8%. To the nearest degree, what is the angle that this hill makes with the horizontal ground? Round to the nearest tenth of a degree.

    asked on September 26, 2014
  31. Anatomy and Physiology

    If one solution is 1000 x as acidic as another, how many pH units would there be between the two?

    asked on July 26, 2012
  32. Physics

    Two rocks are thrown simultaneously from the top of a very tall tower with identical speeds of v = 7.70 m/s, but in two different directions.One of them is thrown with an angle of 10.0 degrees below the horizontal, the other one at an angle of 50.0 degrees

    asked on September 28, 2014
  33. Physics 103

    You're squeezing a springy rubber ball in your hand. If you push inward on it with a force of 1 N, it dents inward 2 mm. How far must you dent it before it pushes outward with a force of 3 N?

    asked on September 24, 2014
  34. algebra

    Which of the following is equal to (2x/5-9)+9. Answers are 2x/5, 5x/2, 2x/5-45, (2 x-9)+45

    asked on February 20, 2014
  35. Physics Problem

    While running, a 70.0 kg student generates thermal energy at a rate of 1200 W. To maintain a constant body temperature of 37.0 C, this energy must be removed by perspiration or other mechanisms. If these mechanisms failed and the heat could not flow out of

    asked on December 3, 2007
  36. Math

    Tracy has one can of iced tea mix. One scoop of the mix makes two servings of iced tea. The scoop holds 1/12 of a can. How many servings of iced tea can Tracy make?

    asked on June 8, 2016
  37. algebra

    Insertor=to make the sentence true -1/3-2/5 answers are. = < >

    asked on February 21, 2014
  38. History

    What does Truman mean when he claims, "Should we fail to aid Greece and Turkey in this fatal hour, the effect will be far reaching to the West, as well as t the East"?

    asked on March 1, 2015
  39. chemistry check my work

    C7H6O3+CH3OH→C8H8O3+H2O In any experiment, 1.50g of salicyclic acid is reacted with 11.20g of methanol. The yield of methyl salicylate, C8H8O3, is 1.31g. What is the percent yield? percent is 77.l1% is this correct?

    asked on April 15, 2010
  40. algebra1

    During on Alpine skiing event the times of four Scears were listed below time is measured in seconds skier a= 114.36 skier b=14.40 skier c=114.48 skierD =114.44 If the stopwatch used was only accurate to the 10th of a second which skiers time would be

    asked on August 27, 2014
  41. P.E. HEALTH

    True or False: The main process for digestion takes place in the stomach. Is the answer False?

    asked on October 31, 2014
  42. Calculus

    I found part B, but stuck on part A. Use implicit differentiation to find the points where the parabola defined by x^2-2xy+y^2+4x-8y+24= 0 has horizontal and vertical tangent lines. A) The parabola has horizontal tangent lines at the point(s): B)The

    asked on January 9, 2018
  43. Physics

    In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture. The tire remains stationary in spite of the three pulls. Alex pulls with force of magnitude 207 N, and Charles pulls with

    asked on February 28, 2014
  44. physics

    A car traveling at 91.0 km/h approaches the turnoff for a restaurant 30.0 m ahead. If the driver slams on the brakes with an acceleration of -6.40 m/s^2, what will her stopping distance be?

    asked on November 20, 2011
  45. English

    What is the preposition in this sentence? Please silence your phone before the movie. A. Silence B. Before C. Your D. Movie My answer is b

    asked on May 21, 2019
  46. Spanish

    Can someone plz fill in the blanks for me i can't find the cd and its due tomorrow??!!!!!!PLZZZZ En la 11.________ te llamé. De la oscuridad me llamaste. Reconocí tu 12.______. Reconociste la mia. "Vente para acá,"13.______. Respondiste: "¿Dónde

    asked on December 7, 2012
  47. Physics

    In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture. The tire remains stationary in spite of the three pulls. Alex pulls with force of magnitude 207 N, and Charles pulls with

    asked on March 1, 2014
  48. Physics check

    An excited atom decays to its ground state and emits a green photon. If the atom decayed to an intermediate state instead, the photon emitted could be.... red or blue?

    asked on April 11, 2008
  49. Chemistry 1

    Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to sweat, and it is determined that the heat of vaporization of its sweat is 215 cal/g. The scientist observing the

    asked on January 24, 2014
  50. PHysics

    A medical technician is trying to determine what percentage of a patient's artery is blocked by plaque. To do this, she measures the blood pressure just before the region of blockage and finds that it is 1.20×104 Pa, while in the region of blockage it is

    asked on November 29, 2007
  51. algebra

    Solve the equation or formula for the indicated variable s=3r4t+or t answers are. t=s/3-r. t=r4-3s t=s/3r4. T=811/s

    asked on February 21, 2014
  52. algebra

    Show all steps solve the equation check for extraneous solution 9|9-8 x|=2x+3

    asked on February 18, 2014
  53. Spanish

    Can u correctly write these sentences in Spanish,plz? 1. I'm very proud of my son. 2. He can spell his name backward and forward. 3. What's his name? 4. How much does a new car cost in America? 5. You must be very rich. If tried already this is wat I got,

    asked on December 6, 2012
  54. Math 9 algebra

    A mechanic charges $70 an hour plus the cost of parts to repair a vehicle. The parts cost $215 for the repair on Tamara's car. A) write an expression for the total cost, C, of repairing Tamara's car for any numbers of hours, n. B) use the expression you

    asked on January 26, 2013
  55. Physical Science- Help Please!

    Suppose that you are given a 100 gram sample of a radioactive substance with a half-life of 32 days. How many grams will be left after 192 days?

    asked on December 5, 2012
  56. Chem

    Why is BaSO4 insoluble in HNO3?

    asked on November 15, 2010
  57. Physics

    Two small plastic spheres are given positive electrical charges. When they are 11.0cm apart, the repulsive force between them has magnitude 0.300N. What is the charge on each sphere if one sphere has four times the charge of the other?

    asked on September 7, 2014
  58. College Physics

    A convergent lens forms a real image 2.41 times the size of the object. The distancebetween object and image is 62.6 cm.Find the distance of the focal point fromthe center of the lens.Answer in units of cm

    asked on July 3, 2012
  59. physics

    Two racing boats set out from the same dock and speed away at the same constant speed of 119 km/h for half an hour (0.500 h), the blue boat headed 26.8° south of west, and the green boat headed 41.4° south of west. During this half-hour (a) how much

    asked on September 28, 2015
  60. Physics Help!!! solids and fluids

    During a transatlantic flight, you drink a bottle of water and tightly close its lid again. Back on the ground during taxiing to the terminal, you notice that the thin plastic bottle is crushed, and you eyeball it to be only about 80 percent of its

    asked on November 8, 2010
  61. algebra

    Need help doing a test change the test equation y-100x=2000can be used to represent monthly salary of a salesman when he sells x computer system what is the salesman monthly salary if he sells no computer

    asked on February 19, 2014
  62. Chemistry

    Calcium hydroxide has Ksp = 5.5 x 10-5 at 25 oC and a molar mass of 74.10 g/mol. How many grams of calcium hydroxide are needed to create 365 mL of a saturated solution of calcium hydroxide at 25 oC?

    asked on April 27, 2015
  63. finance

    Alicia Cooper makes sure to contribute ten percent of her monthly earnings to her 401(k) plan at work. Her 401(k) plan allows her to invest in several different types of mutual funds. Which suggestion for the obtaining money she needs for investing is she

    asked on May 21, 2012
  64. math

    Carbon 14 (14C) dating assumes that the carbon dioxide on Earth today has the same radioactive content as it did centuries ago. If this is true, the amount of 14C absorbed by a tree that grew several centuries ago should be the same as the amount of 14C

    asked on May 31, 2018
  65. Chemistry

    What is the equilibrium constant for the reaction: HCOOH(aq)+ OH (aq) HCOO(aq)+ H2O(l) Ka= 1.7 * 10^-4 Kb for the conjugate base= 4.9 * 10^-11 Thank you!

    asked on May 10, 2010
  66. Spanish

    Conjugate the following irregular verbs in the simple present tense (indicative) 6. Tener(to have) Yo __________ 7. Tener(to have) Nosotros ________ 8. Venir(to come) Tú _________ 9. Venir( to come) nosotros________ 10. Salir( to leave). él/ella_________

    asked on December 6, 2012
  67. Health and PE

    10. A daily value of 10% means that A. 10% of your calories should come from a particular nutrient B. A food consists of 10 of a particular nutrient C. A food package can bear the nutrient claim "light D. One serving provides 10% of the daily amount for a

    asked on December 18, 2017
  68. Math/Statistics/Probability

    Leroy and Fred play chess at a club every Wednesday. The probability that Leroy will lose is .3, that he will stalemate is .5, and that he will win is .2. The probability that Fred will lose is .25, that he will stalemate is .4, and that he will win is

    asked on April 29, 2018
  69. algebra

    Name the property of real numbers illustrated by the equation2·(8·7)=(2·8)·7

    asked on February 21, 2014
  70. vectors

    The position vectors, r km, and the velocity vectors, v km/h, of two boats at a certain time are given by ... Boat A:at 10:00 am rA=6i+10j vA=8i–2j Boat B:at 10:30 am rB=8i+5j vB=4i+j ... determine the time at which boat B should head out so that the two

    asked on February 7, 2013
  71. maths

    a cube has a volume of 27cm3 what is the length of one side of the cube

    asked on May 21, 2011
  72. math

    A plank of wood 6m long is cut in the ratio 1:5. Find the lenght in centimetres of the longer piece

    asked on November 3, 2014
  73. algebra

    Use properties of real numbers to rewrite expression(3/5)(5/3)answers are 8/15,, 15/8,, 0, 1

    asked on February 22, 2014
  74. Child day care

    12. Which of the following is a factor that's very important to high-quality child care, but not often covered in state licensing regulations? A. The group size B. A fire safety clearance C. The staff-to-child ratio D. An annual visit by a representative

    asked on December 6, 2012
  75. Math

    A 100 gallon tank is filled with a salt solution containing 10 lbs of salt. Pure water is pumped in at a rate of 5 gallons per minute and pumped out at the same rate. How many minutes will it take the amount of salt to drop to 8 lbs? Round to one decimal

    asked on December 5, 2016
  76. Chemistry

    How many calories are absorbed when 56.0 g of liquid water at 100C is vaporized to steam at 100C?

    asked on August 8, 2011
  77. math

    A test is composed of six multiple choice questions where each question has 4 choices. If the answer choices for each question are equally likely, find the probability of answering 3 OR 4 questions correctly. 0.131836 0.032959 0.004639 0.164795

    asked on June 19, 2010
  78. Physics

    A large horizontal circular platform (M=143.1 kg, r=3.01 m) rotates about a frictionless vertical axle. A student (m=75.3 kg) walks slowly from the rim of the platform toward the center. The angular velocity ω of the system is 2.10 rad/s when the student

    asked on February 11, 2014
  79. Trigonometry

    In the middle of town, State and Elm streets meet at an angle of 40º. A triangular pocket park between the streets stretches 100 yards along State Street and 53.2 yards along Elm Street. What formula for the area of the pocket park would you use?

    asked on September 26, 2014
  80. Chemistry

    C7H6O3+CH3OH→C8H8O3+H2O In any experiment, 1.50g of salicyclic acid is reacted with 11.20g of methanol. The yield of methyl salicylate, C8H8O3, is 1.31g. What is the percent yield?

    asked on April 14, 2010


    asked on October 15, 2009
  82. Math

    Suppose sinA = 12/13 with 90º≤A≤180º. Suppose also that sinB = -7/25 with -90º≤B≤0º. Find cos(A - B).

    asked on October 14, 2014
  83. Social Studies

    What were the impacts of China's Cultural Revolution?

    asked on April 28, 2008
  84. Chemistry

    can you please please help me with these questions I don't know how to do any of them. I know how to calculate moles and grams and mole ratio,etc but I don't understand the limiting excess reactant and yield stuff. Thanks! 1.In the following chemical

    asked on October 2, 2016
  85. Math

    Chad buys peanuts in 2-pound bags. He repackages them into bags that hold 5/6 pounds of many 2 pound bags should Chad buy so that he he can fill the 5/6 pound bags without any leftovers Common multiple of 5,6 is 30 how 6 goes into 30 5 times

    asked on March 12, 2015
  86. algebra

    You had 207.00,but spend 2.00each day which algebraic expression describes the situation,where d represents the number of days ? Answers are 207+d, 205d, 2+207d, 207-2d

    asked on February 15, 2014
  87. chemistry

    Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.528g/L at 25 degree celsius and 721 mmHg ?

    asked on May 4, 2013
  88. maths

    find the perpendicular distance from the corner of the triangle to the opposite side if the side is 25cm long

    asked on February 16, 2012
  89. Physics

    On a cold winter morning, a child sits on a sled resting on smooth ice. When the 9.20 kg sled is pulled with a horizontal force of 40.0 N, it begins to move with an acceleration of 2.50 m/s^2. The 23.0 kg child accelerates too, but with a smaller

    asked on March 3, 2011
  90. physics:energy

    How much power is needed to push a box (mass 27 kg) over a surface (coefficient of friction μk=0.5) with a velocity of 1.1 m/s?

    asked on October 27, 2010
  91. Algebra

    Suppose U={...-3,-2,-1,0,1,2,3...} is the universal set and R={...-3,-1,1,3...}. What is R? A. {-2,0,2} B. {...-4,-2,0,2,4...} C. {...-4,-2,2,4...} D. {-4,-2,2,4} I think it is C. Thank you!

    asked on October 27, 2016
  92. physics

    When a 69 kg person climbs into a 1000 kg car, the car's springs compress vertically by 2.9 cm. What will be the frequency of vibration when the car hits a bump? Ignore damping. answer should be given in Hz.

    asked on September 26, 2011
  93. Chemistry

    I have a question about solubility rules and net ionic equations so for example : CuSO4+Ba(NO3)2----->BaSO4+Cu(NO3)2 Okay so I know BaSO4 is insoluble while Cu(NO3)is solulable, that means BaSO4 will have a precipitate while Cu(NO3) doesn't. So does that

    asked on October 8, 2016
  94. Chemistry

    I need help on these three questions. For all three of them you're supposed to write a balanced equation for each neutralization. Then, to find the concentrations of the unknown solutions if the following reactions are found to reach equivalence by

    asked on June 9, 2014
  95. algebra

    What is an equivalent form of the following equation 2x-3y=3

    asked on February 19, 2014
  96. History

    Why did many progressives on either side of WW1 see America's entry into the war as an opportunity? What did the progressives accomplish during the war that they felt was positive?

    asked on March 2, 2013
  97. Spanish

    R these correct??plz help En la 11. ___________ te llamé. De la oscuridad me llamaste. Reconocí tu 12. ___________. Reconociste la mia. “Vente para acá,” 13. ___________. Respondiste: “¿Dónde estás, papá? No te 14. ___________ .” “ 15.

    asked on December 7, 2012
  98. Math

    If a graph of a quadratic function can have 0, 1 or 2 x-intercepts. How can you predict the number of x-intercepts without drawing the graph or (completely) solving the related equation? Suppose that the graph of f(x) = ax^2+bx+c has x-intercepts (m,0) and

    asked on June 4, 2015
  99. History

    Between 1850 and 1860 several events occurred in the U.S. that highlighted the struggle over slavery. Describe these events and state what finally led to secession of the South beginning in December of 1860.

    asked on December 9, 2014
  100. Physics 1

    A golf ball is struck with a five iron on level ground. It lands 92.0m away 4.20s later. What was (a) the direction and (b) the magnitude of the initial velocity? I have no idea how to go about using the information given to find the first part (A). Even

    asked on September 11, 2014


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