Popular questions and responses by ben
  1. Chemistry

    Which of the following statements are true about a strong base and a weak base at a pH of 11? A) HCl will not bring the pH of either solution to pH 7. B) Both bases require the same amount of HCl to reach pH 7 because they are both at the same initial pH.

    asked on July 27, 2020
  2. science

    For the reaction 2N2O(g) ⇌ O2(g) + 2N2(g), what happens to the equilibrium position if the volume decreases? A. does nothing B. shifts to the left C. doubles D. shifts to the right

    asked on September 4, 2016
  3. Trigonometry

    A building 200 feet tall casts an 80 ft long shadow. If a person looks down from the top of the building which of the following is the measure of the angle between the end of the shadow and the vertical side of the building to the nearest degree? I

    asked on February 23, 2017
  4. Physics-Intro

    A bullet with mass 60.0 g is fired with an initial velocity of 575 m/s from a gun with mass 4.50 kg. What is the speed of the recoil of the gun?

    asked on October 7, 2014
  5. Chemistry

    Examine the unbalanced electrolytic reaction and its two half-reactions. Cd2+(aq) + Br2(g) → Cd(s) + Br–(aq) E0 = –1.49 V Half-reactions: Cd2+(aq) + 2e– → Cd(s) Br2 (g) → Br–(aq) + e– What is the balanced form of this reaction? Cd2+(aq) +

    asked on July 23, 2020
  6. Physics

    A box is pushed by a 750 N force that acts at a 30 degree angle with a friction less surface.The force pushes a box that has a weight of 500N a distance of 15 meters. How much work is done on the box?

    asked on December 14, 2017
  7. Chemistry

    Which of these are possible uses of electrolysis? A: recharging batteries B: obtaining pure metals from ores C: plating a steel spoon with silver D: generating electricity

    asked on July 23, 2020
  8. Chemistry

    What change do you expect if the value of the reaction quotient is greater than the value of the equilibrium constant? A- Rate of the forward reaction is greater than the rate of the reaction B- The rate of the forward reaction is less than the rate of the

    asked on July 27, 2020
  9. Chemistry

    Which of the following is true about a thermonuclear reaction: A- The rxn will always have 3 intermediate steps B- The reaction will have low activation energy C- The reaction will always be 3rd order D- The reaction is always spontaneous

    asked on July 24, 2020
  10. Chemistry

    Given the equilibrium concentrations in the table, what is the equilibrium constant for the synthesis of ammonia at this temperature? 3H2(g) + N2 2NH3(g) [H2] - 0.5 [N2] - 0.23 [NH3] - 0.020 A. 0.0035 B. 0.014 C. 0.066 D. 0.017

    asked on July 28, 2020
  11. Chemistry

    If the rate law of a chemical reaction is k[NH4+]2[NO2–], what is the order of the reaction? 1. The order of the reaction cannot be determined. 2. 3 3. 1 4. 2 I know that the order for NH4+ should be 2 and NO2- should be 1. Does that make it 3?

    asked on July 23, 2020
  12. Statistics

    One of the questions on a survey of 1,000 adults asked if today's children will be better off than their parents (Rasmussen Reports website, October 26, 2012). Representative data are shown in the DATAfile named ChildOutlook. A response of Yes indicates

    asked on December 4, 2019
  13. Chemistry

    A decomposition reaction is found to be first order with respect to the reactant. What is the relationship between the rate and concentration of the reactant? A) The rate is inversely proportional to the square of the concentration B) The rate is inversely

    asked on July 24, 2020
  14. SQL

    Explain why the following command would create an error, and what changes could be made to fix the error. SELECT V_CODE, SUM(P_QOH) FROM PRODUCT;

    asked on March 1, 2011
  15. Chemistry

    A decomposition reaction if found to be first order with respect to the reactant. What is the relationship between the rate and concentration of the reactant? A) The rate is inversely proportional to the square of the concentration B) The rate is inversely

    asked on July 24, 2020
  16. math

    A tank containing 64 gallons lost 6 1/4 % through leakage. How much was left in the tank?

    asked on May 29, 2017
  17. chemistry

    The pH of a solution prepared by mixing 45 mL of 0.183 M KOH and 65 mL of 0.145 M HCl is i solved it but my answer is wrong. the right one is 1.97. am i missing a step? moles of HCl left over = (moles of HCl) – ( moles of KOH) moles of HCl left over =

    asked on November 23, 2010
  18. Calculus

    Find the area of the region bounded by the graphs of y = x, y = 6 - 2x, and y = 0. (4 points) 3 6 9 None of these Please help I don't know how to do this

    asked on February 14, 2016
  19. language arts

    Which type of person is Merchant Lyte? A kind and generous B crass and sloppy C devious and manipulative D intelligent and hardworking Which lines from the novel best supports the answer to the previous question? A "He's sly" When merchants agreed not to

    asked on December 10, 2014
  20. physics

    A 2.0-kg object moving with a velocity of 5.0 m/s in the positive x direction strikes and sticks to a 3.0-kg object moving with a speed of 2.0 m/s in the same direction. How much kinetic energy is lost in this collision?

    asked on August 13, 2012
  21. Math

    A fertilizer covers 3/4 square foots in 1/2 hour what the unit rate

    asked on June 3, 2019
  22. physics(kinematics)

    The acceleration of a particle is defined by the relation a=-8m/s2. Knowing that x=20m when t=4 and that x=4m when v=16m/s. Determine. A)the time when the velocity is zero. B)the velocity and total distance traveled when t=11s.

    asked on July 19, 2015
  23. physics

    One ball is dropped from a cliff. A second ball is thrown down 1.00 s later with an initial speed of 40.0 ft/s. How long after the second ball is thrown will the second ball overtake the first?

    asked on September 30, 2014
  24. physics

    A stream of water strikes a stationary turbine blade horizontally, as the drawing illustrates. The incident water stream has a velocity of + 17.4 m/s, while the exiting water stream has a velocity of – 15.0 m/s. The mass of water per second that strikes

    asked on January 30, 2014
  25. Health

    Which level of stress is typically most productive?

    asked on August 12, 2020
  26. Math

    How do we find the sum of n terms of the series, 1+(4/7)+(7/49)+(10/343)+..... I know that it can be written as a combination of an arithmetic and geometric progression. 1=(4+3r)/(7^m) ; (r=-1 , m=0) 4/7=(4+3r)/(7^m) ;(r=0,m=1) But how do we find the sum

    asked on July 29, 2017
  27. 8th grade

    what do you call someone who cant turn pancakes?

    asked on October 6, 2010
  28. Statistics

    your medical terminology instructor listed the following grades for the class out of a 75 point test: 33,34,43,45,45,54,55,59,60,62,64,66,67,68,67,68,68,69,70,70 a.find the 90th percentile b. your score was 59, what is your percentile?

    asked on November 3, 2013
  29. chemistry

    5.34g of salt of formula M2SO4 (M is a metal)were dissolved in water. The sulfate ion was precipitated by adding excess barium chloride solution when 4.66g of barium sulfate (BaSO4) were obtained. a)How many moles of sulfate ion were precipitated as barium

    asked on October 19, 2013
  30. Physics

    A pendulum consists of a small object hanging from the ceiling at the end of a string of negligible mass. The string has a length of 0.88 m. With the string hanging vertically, the object is given an initial velocity of 1.7 m/s parallel to the ground and

    asked on October 9, 2012
  31. Chemisty

    The compound potassium carbonate is a strong electrolyte. Write the reaction when potassium carbonate is put into water

    asked on January 22, 2012
  32. Chemistry

    the pka of acetone is CH3COCH3 is 19.3 which of these bases is strong enough to deprotonate acetone? a)KOH (pka of H20 = 15.7) b)Na+ -C(triplebond)CH (pka of C2H2 = 25) c)NaHCO3 (pka of H2CO3 = 6.4) d)NaOCH3 pka of CH3OH = 15.6) i know the answer is b but

    asked on March 12, 2011
  33. chemistry

    A possible mechanism for the overall reaction Br2 (g) + 2NO (g) -> 2NOBr (g) is NO (g) +Br2 (g) (equilibrium arrows: on top it says k1 and on bottom k-1) NOBr2 (g) (fast) step 1 NOBr2 (g) + NO (g) ->(on top of arrow k2) 2NOBr (slow) step 2 the question:

    asked on November 18, 2010
  34. Chemistry

    is KAl(SO4)2 12H2O hygroscopic, deliquescent, or efflorescent?

    asked on October 30, 2008
  35. Science

    A boy pulls his toy on a smooth horizontal surface with a rope inclined at 60'.the horizontal surface is 5N.CALCULATE

    asked on May 23, 2019
  36. Physics

    An object is attached to a hanging unstretched, ideal and massless spring and slowly lowered to its equilibrium position, a distance of 5.3 cm below the starting point. If instead of having been lowered slowly the object was dropped from rest, how far then

    asked on June 8, 2018
  37. Econ

    Suppose that you are a bicycle producer. In three to four sentences, explain why you are willing to supply the most bicycles at the highest price.

    asked on November 1, 2017
  38. Physics

    A rock is dropped from a bridge to the water below. It takes 2.40 s for the rock to hit the water. Find the speed (in m/s) of the rock as it hits the water. How high (in metres) is the bridge above the water?

    asked on September 26, 2014
  39. Physics

    A parachutist relies on air resistance (mainly on her parachute) to decrease her downward velocity. She and her parachute have a mass of 55.5kg and air resistance exerts a total upward force of 620N on her and her parachute. What is the combined weight of

    asked on April 1, 2013
  40. chemistry

    The question below, i was wondering if it decrease because the N2 is on the right and so to add to left it would be too much so it gets rid of it by decreases and doing to the right? because the left side is (+) endothermic? sorry im a little confused. if

    asked on October 25, 2010
  41. Accelerated algebra

    Comet C has an elliptical orbit of eccentricity 0.9638 with the sun at one focus. The greatest distance of the comet from the sun is 2940 million miles. Find the least distance between the comet C and the sun.

    asked on March 1, 2016
  42. math

    The ratio of girls to boys in Liza’s classroom is 5 to 4. How many girls are in her classroom if there is a total of 27 students?

    asked on May 14, 2015
  43. language arts

    Be still, sad heart! and cease repining; Behind the clouds is the sun still shinning; thy fate is the common fate of all, into each life some rain must fall some days must be dark and dreary 1. from the context, what do you conclude is the probable meaning

    asked on March 10, 2015
  44. Physics Science

    How many grams of water at 20°C are necessary to change 800g of water at 90°C to 50°C?

    asked on November 5, 2014
  45. trig

    cos è = 0.9659 A = ? H = 20

    asked on March 13, 2013
  46. physics

    A 1.5-kg playground ball is moving with a velocity of 3.0 m/s directed 30 ° below thehorizontal just before it strikes a horizontal surface. The ball leaves this surface 0.50 slater with a velocity of 2.0 m/s directed 60 ° above the horizontal. What is

    asked on August 12, 2012
  47. Physics (Normal Force)

    When a book weighing 10 N is placed on a table, the table exerts a normal force of 10 N on the book. When a crate weighing 250 N is placed on the same table, the table exerts a normal force of 250 N on the crate. Explain the mechanism that allows the table

    asked on October 1, 2009
  48. Math

    A vector t has initial point (-5,-2) and terminal point (-3,4). Write t in the form t=ai+bj.

    asked on December 12, 2019
  49. Chemistry

    I just need help with these three 1.Cell respiration glucose is reacted wth oxygen in body to produce carbon dioxide and water how many liters of carbon dioxide would be produced if 90.0 g of glucose completely reacts with oxygen C6H12O6(s)+ 6O2(g) ->

    asked on April 22, 2015
  50. If you answer these questions I will pass this cla

    1.Cell respiration glucose is reacted wth oxygen in body to produce carbon dioxide and water how many liters of carbon dioxide would be produced if 90.0 g of glucose completely reacts with oxygen C6H12O6(s)+ 6O2(g) -> 6H2O(g) + 6CO2 (g) How many liters of

    asked on April 22, 2015
  51. language arts

    which of the following passages from the text suggests that johnny is becoming less self centered? (chapter 8, Johnny Tremain) 1. Johnny liked the old woman all the better that in the end she had been unable to see a consider master..humiliated, tossed

    asked on January 2, 2015
  52. Math Physics

    What is the wavelength in metres of an electromagnetic wave with a frequency of 10^14/s?

    asked on November 24, 2014
  53. Calculus 1

    A right triangle has a fixed base of length 6 meters and a height that is increasing at a rate of 2 meters/second. At what rate is the length of the hypotenuse increasing when the height is 8 meters?

    asked on October 26, 2014
  54. math

    How long will it take a car 3m long travelling at 100km/h to overtake a truck 10m long travelling at 50km/h, if the car is 10m behind the truck

    asked on October 15, 2014
  55. Physics

    A 3.00-g bullet (c = 0.0305 cal/g . C° = 128 J / kg . C°) moving at 180 m/s enters a bag of sand and stops. By what amount does the temperature of the bullet change if 80% its KE becomes thermal energy that is transferred to the bullet? Thank ´s fir

    asked on November 3, 2013
  56. math

    What's the quickest way for an ant to go from the ground to the tree trunk?

    asked on August 22, 2012
  57. international trade

    2. Consider two countries, Home and Foreign. Assume that Home is labor-abundant while Foreign is land-abundant. Also suppose that there are two industries, wine and cheese, with wine being the more labor-intensive industry. a) Suppose that both wine and

    asked on May 24, 2012
  58. math

    Find the area of an equilateral triangle (regular 3-gon) with the given measurement. 9-inch perimeter A = sq. in.

    asked on January 28, 2011
  59. economics

    Suppose that the government decides to charge cola consumers an excise tax. Before the tax, the market is in equilibrium, where 12 million cases of cola are sold every month at a price of $3.50 per case. After the tax, 6 million cases of cola are sold

    asked on October 16, 2009
  60. Math

    Find the area between y=3sinx and y=3cosx over the interval [0,pi].

    asked on December 4, 2007
  61. Chemistry

    Br2(aq) + 2 KI(aq) ==> 2 KBr(aq) + I2(s) What is oxidized and what is reduced in this reaction?

    asked on June 15, 2020
  62. Accounting

    Herring Wholesale Company has a defined benefit pension plan. On January 1, 2016, the following pension related data were available: ($ in 000s) Net gain–AOCI $ 350 Accumulated benefit obligation 3,170 Projected benefit obligation 3,200 Fair value of

    asked on November 30, 2016
  63. Calculus

    For what values of the constants a and b is (1,3) a point of inflection of the curve y=ax^3+bx^2?

    asked on November 29, 2016
  64. Chemistry

    Which of the following is the correct unit for specific heat? degree C*** Cal cal/g cal/(g*deg C)

    asked on May 16, 2016
  65. Chemistry

    The heat capacity of an object depends in part on its enthalpy mass potential energy*** shape

    asked on May 16, 2016
  66. Algebra

    A campground consists of 8 square campsites arranged in a line along a beach. The distance from the edge of a campsite to the water at the end of the beach is 5 yards. The area of the campground, including the beach, is 1102 square yards. What is the width

    asked on March 24, 2016
  67. Math

    The pool is partially filled with water. The volume of the water in the pool is 45 cubic feet. How deep is the water? A.0.5 ft B.1.5 ft C.2.5 ft** D.3.5 ft Am I right?

    asked on March 7, 2016
  68. Physics

    It takes a force of 53kN on the lead car of a 16-car passenger train with mass 9.1x 10^5 kg to pull it atconstant 45 m/s on level tracks. (a) What power must the locomotive provide to the lead car? (b) How much more power to the lead car than calculated in

    asked on March 23, 2015
  69. language arts

    which question should you ask during your third read of multi draft reading process? 1. who is the speaker, or the voice that "says" the words of the poem? 2. How has the work expanded my ideas-or my imagination? 3. What do the word choices and imagery

    asked on January 27, 2015
  70. language arts

    I'm in Jonny Tremain chapter 5 1. Which of the following is the most significant event in the plot following Jonny's accident? A. Johnny releases that Rab and his uncle are Whigs B. Rab teaches Jonny how to ride Goblin C Mrs. Lapham recruits Mr. Tweedie to

    asked on December 15, 2014
  71. algebra 1

    A store’s cost for a stereo was $27. Th e markup was 75%. A customer purchased it on sale at 40% off the marked up price. What was the purchase price of the stereo? Please help!

    asked on December 9, 2014
  72. Algebra 2

    1. Find the midpoint and the distance between the points (8,–6) and (13, 4). 1. (4, –3), 10 units 2. 3. 4. (10, –1), 9 units 2. Find the vertex and the focus of the parabola with the equation 4y = x2 – 12x + 52. 1. V(6, 4), F(6, 5) 2. V(6, 4), F(7,

    asked on June 4, 2011
  73. AP Chemistry

    There is an unknown amount of unlabelled monoprotic acid in an unknown amount of water titrated with a sample with a solution of NaOH of unknown molarity. After adding 10.0 mL of NaOH, the pH=5.0. The equivalence point is 32.22 mL of NaOH. What is the Ka?

    asked on March 8, 2011
  74. calculus

    Determine the values of a and b for the function f (x) = ax^3 + bx^2 + 3x - 2 given that f (2) = 10 and f ′(-1) = 14. Please help, Thanks!

    asked on March 1, 2011
  75. Physics

    A neutron collides elastically with a helium nucleus (at rest initially) whose mass is four times that of the neutron. The helium nucleus is observed to rebound at an angle θ'2 = 44° from the neutron's initial direction. The neutron's initial speed is

    asked on March 7, 2010
  76. Chemistry

    A sample of .234g of carbon is placed in a closed stainless steel bomb with .502g of of oxygen gas. The mixture is ignited giving of carbon dioxide. How many grams of carbon dioxide should be obtained upon combustion?

    asked on February 21, 2010
  77. chemistry

    suppose that you could decompose 0.250 mole of Ag2s into its elements a.How many moles of silver would you have? how many moles of sulfur would you have? b. how many moles of ag2s are there in 38.8 g of AG2S? how many moles of silver and sulfur would be

    asked on March 16, 2009
  78. Math

    What might you have if you don't feel well?

    asked on April 22, 2008
  79. Math

    A pencil holder shaped like a triangular prism is shown in the picture. The height of the pencil holder is 12 cm, and the volume of the pencil holder is 216 cm3. What is the area of the base? A 144 Square Centimeters B 12 Square Centimeters C 2592 Square

    asked on April 2, 2018
  80. Physics

    A ball is raised to a height of 30.0m above the ground. What would its velocity be when it has fallen to a height of 15.0m above the ground. (You must solve this as a conservation of energy problem, and can do it in one step!) Any help would be

    asked on October 1, 2016
  81. Physics

    The A above middle C has a frequency of 440 Hz. If you play this note on a piano and the piano string oscillates with an amplitude of 0.55 mm, what is the maximum acceleration of the string?

    asked on June 9, 2016
  82. Chemistry

    At what stage of a reaction do atoms have the highest energy Product stage Reactant stage Transition state stage*** The stage of the highest energy depends on the atom

    asked on May 16, 2016
  83. Chemistry

    What does the symbol ∆H stand for? one Calorie given off by a reaction the heat capacity of a substance*** the heat of a reaction for a chemical reaction the specific heat of a substance

    asked on May 16, 2016
  84. Geometry

    Segment AD is perpendicular to the radius of circle (B) and the radius of circle (c). If radius BA=6in, segment AD=21in and radius CD=16in, find the length of BC to the nearest tenth of an inch.

    asked on May 10, 2016
  85. Physics - Electrons (Inside the atom)

    A beam of electrons is directed into uniform electric and magnetic feilds that are at right angles to one another and to the beam direction. The strength of the magnetic feild is 55 mT; the electric feild strength is adjusted to 600 kV m^-1 when the beam

    asked on February 17, 2016
  86. Physics

    A skier slides horizontally along the snow for a distance of 12.1 m before coming to rest. The coefficient of kinetic friction between the skier and the snow is 0.0343. Initially, how fast was the skier going?

    asked on August 27, 2015
  87. language arts

    choose the meaning that best matches the word "placate" in the sentence. General Gage's efforts to placate the colonists in hopes of avoiding war were not having a desired effect. A punish B please C irritate D aggravate is it b?

    asked on January 2, 2015
  88. chemistry physics

    A car is traveling toward you at 40.0 mi/h. The car horn produces a sound at a frequency of 480 Hz. What frequency do you hear? Assume that the sound velocity in air is 1090 ft/s. Do I need to convert ft/s to m/s?

    asked on November 24, 2014
  89. Statistics

    your medical terminology instructor listed the following grades for the class out of a 75 point test: 33,34,43,45,45,54,55,59,60,62,64,66,67,68,67,68,68,69,70,70 a.find the 90th percentile b. your score was 59, what is your percentile?

    asked on November 3, 2013
  90. Chem

    What will be the temperature of a 3.5 gram sample of carbon dioxide gas in a 2.5 liter container at .955 atm

    asked on April 1, 2013
  91. computer science

    Using the Crow’s Foot notation, create an ERD that can be implemented for a medical clinic, using the following business rules:  A patient can make many appointments with one or more doctors in the clinic, and a doctor can accept appointments with many

    asked on June 27, 2012
  92. international trade

    From the economic point of view, India and China are somewhat similar: both are huge, low-wage countries, probably with similar patterns of comparative advantage, which until recently were relatively closed to international trade. China was the first to

    asked on May 10, 2012
  93. Investments

    A firm has current assets that could be sold for their book value of $7 million. The book value of its fixed assets is $57 million, but they could be sold for $99 million today. The firm has total debt with a book value of $32 million but interest rate

    asked on February 4, 2012
  94. Investments

    An analyst gathers the following information about Meyer, Inc.: • Meyer has 1,300 shares of 8% cumulative preferred stock outstanding, with a par value of $240, and liquidation value of $250. • Meyer has 22,400 shares of common stock outstanding, with

    asked on February 4, 2012
  95. chemistry

    A 15.0 ml sample of an unknown HClO4 solution requires 50.3 ml if 0.101 M NaOH for complete neutralization. What was the concentration of the unknown HClO4 solution? The neutralization reaction is: HClO4(aq)+ NaOh(aq)yields H2O(l)+ NaClO4 (aq) If anyone

    asked on December 3, 2011
  96. stats

    use technology to find the P-value for a two tailed test with n=28 and a test statistic t=2.032 P-value =???? Help please! i don't understand this

    asked on May 8, 2011
  97. chemistry

    Degree of unsaturation why is it 5? C20H32CIN do i ignore the second C? because i did 21(2)+2=44 44-32+1-1 / 2 = 6 but i get it right with 20(2)+2=42 42-32-1+1 / 2 = 5 do i always ignore extra C's?

    asked on February 28, 2011
  98. chemistry

    Based on molecular mass and boiling point of the five compounds in the table below, which should have the high? est dipole moment: first # molecular mass 2nd: boiling point compound 1 244 203 compound 2 346 255 compound 3 250 138 compound 4 246 146

    asked on December 13, 2010
  99. chem class

    What is the concentration (in M) of hydroxide ions in a solution at 25°C with pH = 4.282?

    asked on November 23, 2010
  100. chemistry

    The pH of a solution prepared by mixing 45 mL of 0.183 M KOH and 65 mL of 0.145 M HCl is ?.

    asked on November 23, 2010


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