1. Chemistry

    The density of a 15.00% by mass aqeous solution of acetic acid is 1.0181g/mL What(i)the molarity (ii)molality (iii) the mole fraction of each component?

    asked by Wendy on August 13, 2018
  2. Algebra (answer check)

    Where is the vertex of the graph of y equals negative x squared plus 2 x plus 5 located? (1,5) < it's not this one (1,6) (-1,3)

    asked by KIM on February 12, 2017
  3. AP Chemistry- Equilibrium

    If 10.0 mL of 0.18 M MgCl2 are mixed with 20.1 mL of 0.56 M NaOH, what will be the final concentration of Mg2+ in solution when equilibrium is established? Assume the volumes are additive. Ksp = 1.2 ✕ 10-11 for Mg(OH)2.

    asked by Danielle on February 9, 2014
  4. Chem- Bronsted bases

    Which of the following substances can act as a Bronsted base in aqueous solution? (Select all that apply.) H2O NH3 H2 CH3NH2 O2 PH41+ CO32-

    asked by Elizabeth on February 23, 2014
  5. Chemistry

    Assume that the ionic compound CaCl2, separates completely into Ca and Cl ions when it dissolves in water. How many moles of each ion are present in the solution???

    asked by Serena on August 9, 2012
  6. chemistry

    What is the molarity (mol/dm3) of a solution prepared by dilution of 0.125 moles of sodium chloride (NaCl) to 2.50x102 mL with water?

    asked by Josh on May 5, 2014
  7. Chemistry

    Repost:: sorry couldn't understand it What is the concentration of C2O4^-2 in a 0.370M oxalic acid solution? Ka1=5.6x10^-2 and Ka2=5.1x10^-5

    asked by V on March 20, 2013
  8. Business & Technology

    1. When a hurricand, flood, or pandemic strikes a country, who is most likely to respond. 2. Which economic system is the best solution for handling a crisis of epic proportion?

    asked by Deb on May 5, 2011
  9. Chemistry

    A mixture of lead, magnesium, nitrate and chromate ions are present in a solution. What will the precipitate be? a) MgPb b) Pb(NO3)2 c) PbCrO4 d) MgCO3 I think its d)- am i right?

    asked by scilover on May 19, 2013
  10. Chemistry

    Calculate the pH of a solution that is made by mixing 10.00 mL of 0.2500 M HCl with 35.00 mL of .1500 M HNO3 and diluting the mixture to a total volume of 100.00 mL

    asked by Dan on May 5, 2011
  11. Chemistry

    Write the balanced chemical equation for the equilibrium that is taking place between acetic acid and sodium acetate in the buffer solution.

    asked by Axl on March 15, 2010
  12. Phamacy math

    One teaspoonful diluted to a quart results in a 1/5000 solution. What is the amount of potassium permanganate in grams required to fill this prescription?

    asked by Nick on September 21, 2012
  13. science

    Assume that you have a pH meter which would enable you to very accurately measure the pH of a solution. Describe an experimental design that would allow you to pinpoint the exact pH at which Catalase is the most active.

    asked by anonymous on March 11, 2011
  14. chemistry

    What volume of 0.1M Of sulphuric acid is needed to neutralize 100cm³ of a solution of sodium carbonate of mass concentration 20gram over dm³

    asked by Denis on July 26, 2018
  15. Chemistry

    How many grams of a sodium salt would you need to prepare 500 ml of a buffer at pH = 3.29, using 0.100M solution. (Use 3 sig fig , atomic wts to whole number)

    asked by John on April 9, 2018
  16. Chemistry

    FeSCN2+ -> Fe3+ + SCN- Solution is initially dark red. If some Ag+ is added to form AgSCN. what happens to position of equilibrium? what happens ot the color?

    asked by Grace on February 8, 2011
  17. Chemistry

    You are given 350 mL a stock solution of 8.32E-03 M benzoic acid, MW = 122.125 g/mol. If the actual density should be 1.05 g/mL. What is your percent error?

    asked by Udith on April 3, 2008
  18. Chemistry II

    Determine the grams of solute required to prepare 0.5 m solution HC2H3O containing 750 g of water. Make sure to show your work. **(Thanks for helping by the way.)**

    asked by Chrystal on January 22, 2014
  19. Chemistry

    Can anyone answer this question please. (Determine the concentration of an aqueous NaCl solution if 31.5 mL are required to reach the equivalence point when titrated with 25.0 mL of 0.20 M AgNO3.)

    asked by John on September 19, 2010
  20. chemistry

    Which of the following compounds would result in an exchange reaction if mixed in an aqueous solution with (NH4)2S? a. SrCl2 b. Li2C2O4 c. CH3CO2Ag d. MnSO4 I don't know what to look for.

    asked by Morgan on September 15, 2010
  21. Chemistry

    A mixture of lead, magnesium, nitrate and chromate ions are present in a solution. What will the precipitate be?** a) MgPb b) Pb(NO3)2 c) PbCrO4 d) MgCO3

    asked by Andrea on May 15, 2012
  22. chemistry

    Compute the freezing point of this solution: 25.5 g C7H11NO7S (4-nitro-2-toluenesulfoinoic acid dihydrate) in 100 g H2O. (nonionizing solute)

    asked by Les on August 4, 2010
  23. Chemistry

    How do you set up this problem? Calculate the volume , in ml of a 0.150 M NaOH soulution needed to neutralize 25.0ml of a 0.288 M HCl solution?

    asked by Catherine on November 23, 2014
  24. chemistry

    A buffer with a pH of 3.93 contains 0.17 M of sodium benzoate and 0.32 M of benzoic acid. What is the concentration of [H ] in the solution after the addition of 0.054 mol of HCl to a final volume of 1.5 L?

    asked by Kira on November 4, 2014
  25. chemistry

    The Ksp of Ag2CrO4(s) is 1.12 x 10^-12. Calculate the molar solubility of AgCrO4(s) a) in pure water b)in a solution of 0.10 mol/L sodium chromate, Na2CrO4(s)

    asked by John L on April 3, 2008
  26. Chem

    I don't get how to do this: What is the pH of the solution created by combining 11.30 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? What are the pH values if you take into account that the 8.00 mL of

    asked by Anne on October 29, 2007
  27. Algebra

    please solve x+5y=10 -2x-10y=-20 Since the second equation can be obtained from the first (by multiplying both sides by -2), they are not independent and there is no unique solution. There are an infinite number of x,y combinations that are solutions.

    asked by Tony on March 20, 2007
  28. AP Chemistry

    Hi I need help on this bonus question my teacher gave out it's reducing/oxidation equation in an acidic solution. Cr(NCS)6-4 (aq) + Ce+4(aq) ----------> Cr+3(aq) + Ce+3(aq) + NO3-1(aq) + CO2(g) + SO4-2 (aq)

    asked by Gordon on May 9, 2017
  29. math

    I am thinking there has to be a typo on my homework. The question states to Decide if the given number is a solution to the given equation and below it it shows 24/x 2;3.... does this make sense if so could someone explain it to me?

    asked by sam on September 20, 2009
  30. pharmaceutical calculation

    A physician orders 2gms of an antibiotic to be placed in 1000ml of D5W. Using a constituted injection that contains 300mg/2ml, how many mls should be added to the IV solution?

    asked by Anonymous on January 8, 2011
  31. aqueous solution

    Write the positive and negative ions that result when the following compounds are dissolved in aqueous solution: Na2S (aq): (NH4)2CO3 (aq): K2SO4 (aq):

    asked by Annette W on March 21, 2013
  32. AP Chemistry- Equilibrium

    If 10.0 mL of 0.18 M MgCl2 are mixed with 20.1 mL of 0.56 M NaOH, what will be the final concentration of Mg2+ in solution when equilibrium is established? Assume the volumes are additive. Ksp = 1.2 ✕ 10-11 for Mg(OH)2.

    asked by Danielle on February 9, 2014
  33. math

    A physician orders 2gms of an antibiotic to be placed in 1000ml of D5W. Using a constituted injection that contains 300mg/2ml, how many mls should be added to the IV solution?

    asked by melissa on March 2, 2008
  34. chemistry

    write half reaction for KMnO4 and (COMM)2 and balance the equation.calculate the atomic mass of M in14.0g/dm3 of solution

    asked by precious on September 21, 2014
  35. Math

    Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 10x + 5y = 52.5 30x – 7y = 80.5

    asked by Shirley on February 5, 2012
  36. chemisty

    the solubility product constant (Ksp) of ca(oh)2 at 25 C is 4.42*10^-5. a 500 ml of saturated solution of ca(oh)2 is mixed with equal volume of .4M naoh. what mass of ca(oh)2 is precipitated?

    asked by tor on April 26, 2017
  37. AP Chemistry

    We drop 17.3 grams of magnesium into 435 mL of a 2 M HCl solution. What is the maximum volume of dry hydrogen that could be produced by this reaction at STP?

    asked by Anonymous on October 15, 2013
  38. SCIENCE

    3) You add 36 g of MgSO4 to pure water to a final volume of 200 mL. What concentration of solution did you make ? Express the results as percentage, % (w/v).

    asked by LIN on February 5, 2017
  39. chemistry

    Calculate the concentration in parts per million (ppm) of the solute in each of the following aqueous solutions (a) 0.00500 g of sodium chloride in 850 mL of solution

    asked by katiy on April 26, 2012
  40. Chemistry

    What is the molality of a solution of aluminum nitrate that contains 77.0 g of Al(NO3)3 dissolved in 120.0 g of water? Use molar masses with at least as many significant figures as the data given.

    asked by Heather on April 27, 2015
  41. chemistry

    The volume of 0.15 mol dm ^-3 sulphuric acid,H2SO4 required to completely neutralise 25.0cm^3 of potassium hydroxide,KOH solution.

    asked by mandy on May 7, 2014
  42. chemistry

    What volume of 0.050 M AgNO3, silver nitrate solution is required to reat completely with 60.0 mL of 0.025 M K2S, potassium sulfide?

    asked by AJ on March 13, 2015
  43. Chemistry

    how do I balance the following skeleton redox equation for a reaction occurring in acidic solution. HNO2 + MnO4- yield to Mn2+ + NO3-

    asked by Rachel on March 12, 2012
  44. science

    What volume of 0.1M Of sulphuric acid is needed to neutralize 100cm³ of a solution of sodium carbonate of mass concentration 20gram over dm³

    asked by Denis on July 26, 2018
  45. Chemistry (really need quick help)

    Balance the following equations. (Use the lowest possible coefficients. These may be zero.) (a) As(s) + ClO3-(aq) ---> H3AsO3(aq) + HClO(aq) (acidic solution) I am using half-reactions but I don't really get this at all. Can someone explain?

    asked by Samantha on May 5, 2011
  46. Chemistry

    What is the molarity of a solution prepared by dissolving 820. g of sodium phosphate, Na3PO4, in water and diluting to 2.89 liters? (atomic masses: Na = 22.99, P = 30.97, O = 16.00)

    asked by Anna on November 14, 2014
  47. Physics

    Hello! I live in Mexico, and I have a couple of questions I asked on Y answers, both English and Spanish, and have gotten no reply, and I need to turn this in for my bimonthly exam in physics this Monday. I need to calculate the volume and surface area of

    asked by Gabby on September 30, 2012
  48. chemistry

    1. An aqueous solution of weak base B of unknown concentration is tritrated with a known concentration of strong acid, HA. (a) Write the balanced chemical equation for this acid-base reaction, identifying the conjugate acid/base pairs. (b) If the

    asked by Phuong on April 8, 2011
  49. Physics

    A small block on a frictionless horizontal surface has a mass of 2.50×10−2 Kg. It is attached to a massless cord passing through a hole in the surface. The block is originally revolving at a distance of 0.300 m from the hole with an angular speed of

    asked by Christina on November 7, 2007
  50. Algerbra

    Can anyone help me on these two problems also. I am getting so confused and tired. The length of a rectangle is fixed at 27cm. What lengths will make the perimeter greater than 100cm? also this problem Trians A and B are traveling in the same direction on

    asked by Kim on January 25, 2009
  51. Circuits and electronics applications3

    In working with complex exponentials we need some simple rules and short cuts for doing the algebra. Remember that a complex number z is a vector in the 2-dimensional plane. It has a length (also called "magnitude") |z| and an angle ∠(z) measured

    asked by sengeni on November 25, 2016
  52. English help

    From the words below supply the words needed to complete the sentences. Querulous, commiserate, tedious, pugnacious, thwart, incorrigible A. Trying to keep the INCORRIGIBLE prisoners from escaping was Jack's responsibility. Although he sometimes enjoyed

    asked by Anonymous on May 10, 2014
  53. physics

    Hi I have some graph problems I need help on. Sketch a graph of velocity vs. time. A cart is moving to the right on a horizontal surface while a constant net force of 3 newtons acts on it to the left. the force acting on the cart stops after a short period

    asked by jen on October 7, 2010
  54. Math

    Hi everyone. Would someone be able to help me with this problems? I know it's a lot, if you only want to help with one or two, that is fine!! 9. Could you show how to use factoring and the zero-proudct property to find the zeros of each quadratic function?

    asked by Eliza on November 19, 2008
  55. Physics

    I need help on two problems :P 1. A spherical balloon is partially blown up and its surface area is measured. More air is added increasing the volume of the balloon. If the surface area of the balloon expands by a factor of 2.0 during this procedure, by

    asked by Johnny on September 1, 2010
  56. chemistry

    Limestone rock contains solid calcium carbonate that can react with acid to give products. In one experiment, 1.452 g of limestone rock is pulverised and then treated with 25.00 mL of 1.035 M HCl solution. After the reaction is completed, the resulting

    asked by Anonymous on February 12, 2016
  57. Algebra

    Question: Looking below is this answer correct? If you follow the math, you reach the entire population before 8 hours have passed yet the solution says 8.86 hours.... Is the solution giving us the numbers in the set and not the actual elapsed hours???

    asked by Chris on November 30, 2010
  58. Algebra problems

    I have some problems that I would like checked please. Find and simplify the difference quotient f(x+h)-f(x)/h, h can not equal 0 for the given functions. 1. f(x)=x^2+3x+9- I got 2x+h+3 Evaluate the piecewise function at the given value of the independent

    asked by Soly on September 5, 2007
  59. algebra

    For 1983 through 1995, the amount of private donations D (in millions) allocated to education can be modeled by D= 1.78t^3-6.02t^2+ 752t+ 6701 where t is the number of years since 1983. In what year was 14.3 billion of private donations allocated to

    asked by Nick on October 30, 2010
  60. Math

    What numbers can be expressed as an alternating-sum of an increasing sequence of powers of 2 ? To form such a sum, choose a subset of the sequence 1, 2, 4, 8, 16, 32, 64, . . . (these are the powers of 2). List the numbers in that subset in increasing

    asked by CSI on April 15, 2010
  61. Algebra - 2 more questions... ^^

    Thank you for helping on the other problem, but could you maybe explain how I should solve these two problems? 1. In 1985, Barry was 13 years old and his father was 43. In what year will Barry's age be two-fifths of his father's age? 2. The length of a

    asked by Jason on November 28, 2007
  62. Math

    I have two problems (listed below): 1.The profit P (in hundreds of dollars) that a company makes depends on the amount x (in hundreds of dollars) the company spends on advertising according to the model P = 230 + 20x -0.5x^2. What expenditure for

    asked by Danielle on March 4, 2008
  63. genetics

    need help with these genetics problems. please help with what you can. thanks: Given that loci A and B in Drosophila are sex-linked and 20 map units apart, what phenotypic frequencies would you expect in male and female offspring resulting from the

    asked by stew on September 24, 2007
  64. Trigonometry

    Find all solutions between 0 and 2pi. Round to two decimal places. In radians. Find all solutions between 0 and 2 pi. Round to two decimal places for the final solutions. The answers should be in radian mode. If you can use exact values use them. At least

    asked by Taylor B on May 13, 2013
  65. American Government

    Hello all! Just would like to check some answers, I am fairly confident them, but you never know! 1.What is a legitimate government? a. one in which government leaders obtain and keep power by using force b. one that offers the fastest solution to a

    asked by Jessica L. on September 10, 2016
  66. Algabra

    Landscape designers often use coordinate geometry and algebra as they help their clients. In many regions, landscape design is a growing field. With the increasing popularity of do-it-yourself television shows, however, many homeowners are becoming amateur

    asked by Isaac on November 25, 2009
  67. math

    Find the initial amount given an exponential function. Given the equation y = 24(0.77)^t, what is the initial amount? To find the initial amount, I need to replace t with 0. When I do that, I get y = 24(0.77)^0 which is y = 24(1), so y = 24 In doing other

    asked by Carly on November 30, 2016
  68. chemistry help!!! (clueless)

    1. Consider the conductance meter and the titration method of determining the salt content of a brine sample. Discuss at least two advantages and two disadvantages of each method. 2. A corrosion technologist pipetted a 50.00 mL sample of an unknown brine

    asked by lightning on June 19, 2006
  69. Math

    I really need help with my homework. It's a long story. My great grandma wanted to walk alone with the dog but she almost got us stranded in Winco, blah blah blah blah blah, I have cheer pictures today, blah blah blah... basically I'm in my room crying

    asked by Candy Corn  on October 6, 2011
  70. Improving Your Writing

    Background: Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides

    asked by Babs on August 14, 2012
  71. English

    I forgot to add these very last sentences. Thank you very much for all! 1) I last felt sorry when my best friend lost his father in a car accident. 2) I last felt sorry for a friend of mine, whose father was run over by a lorry while crossing the road. 2)

    asked by Mike on March 28, 2011
  72. Algebra

    11.) -4 = 2/5 x -- = my answer A.x = 10 B.x = -10 C.x = -1-- D.x = 1 12.) Which equation is an identity? A. 11 - (2v + 3) = -2v - 8 B. 5w + 8 - w = 6w - 2(w - 4)-- C. 7m - 2 = 8m + 4 - m D. 8y + 9 = 8y - 3 13.) Which equation has no solution? A. 8 - (5v +

    asked by XD on October 16, 2018
  73. Chemistry

    1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC). 2) A sample of coal is

    asked by Sarah on November 14, 2010
  74. Chemistry

    1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC). 2) A sample of coal is

    asked by Sarah on November 14, 2010
  75. Chem

    Sodium cyanide NaCN is a solid which melts at 564C to give a liquid that conducts electricity, It also dissolves in water to give a conduction solution. Deduce the type of bonding that holds the compound together and why? Write a balanced chemical equation

    asked by Anthony on March 12, 2007
  76. Chemistry(Please check)

    1) Which statement below is correct (true)? a) Since HNO2 is a stronger acid than HF it must have a greater pKa. b) Since HOCℓ is a stronger acid than HCN, then OCℓ– is a stronger base than CN–. c) The dissociation (or ionization) of HOCℓ in

    asked by Hannah on March 24, 2012
  77. verifying trigonometric identities

    How do I do these problems? Verify the identity. a= alpha, b=beta, t= theta 1. (1 + sin a) (1 - sin a)= cos^2a 2. cos^2b - sin^2b = 2cos^2b - 1 3. sin^2a - sin^4a = cos^2a - cos^4a 4. (csc^2 t / cot t) = csc t sec t 5. (cot^2 t / csc t) = csc t = sin t

    asked by Anonymous on March 3, 2008
  78. math 6

    Javier solves three math problems in five minutes. He has 20 math skill-work questions for homework, and he wants to complete them before talking with friends. How many minutes will javier take to complete 20 math skill work questions

    asked by sally on November 5, 2015
  79. graph

    can someone SHOW me how to solve these graphs?2x > -6 and x - 4 < 3 x + 5 > 2x + 1 and -4x < -8 -6 < x + 3 < 6 (Remember this is an "and" statement) -3x < -6 or x + 5 < -2 x - 2 > 2x + 1 or -10 > -2x - 2 Look at the third. -6 < x + 3 < 6 (Remember this is

    asked by mike on June 29, 2007
  80. Chemistry

    Expt #1- Molecular Weight of Unknown Acid Unknown Acid: #2 Mass of Unknown solid acid transferred:0.414g Volume of volumetric flask: 100.00 mL Concentration of NaOH: 0.0989 M Aliqot of acid titrated with NaOH: 25.00 mL Average volume of Naoh from

    asked by Rayana on October 10, 2010
  81. Physics

    A 17.0 kg monkey hangs from a cord suspended from the ceiling of an elevator. The cord can withstand a tension of 220N and breaks as the elevator accelerates. What was the elevator's minimum acceleration (magnintude and direction)? Please show me how to do

    asked by Kelly on January 2, 2007
  82. 5th grade math (word problems)

    Can you explain how to do the following problems? 1. Order these fractions from Greatest to least. 3/12, 5/8, 1/4, 7/8, 4/16 work: find least common denominator 3/12 = 12/48, 5/8 = 30/48, 1/4 = 12/48, 7/8 = 42/48 answer = 7/8, 5/8, since 3/12 and 1/4 are

    asked by Alex on May 6, 2013
  83. geometry

    1.in which geometry do lines no contain an infinite number of points? (a) plane coordinate geometry (b) discrete geometry (c) graph theory 2. in which geometry do points have thickness? (a) plane coordinate geometry (b) discrete geometry (c) graph theory i

    asked by SoccerStar on August 30, 2011
  84. Trig Identities

    Please help...I'm not understanding trig identities and how to manipulate and express these two problems in their associated functions. Thanks a)Express as a function of cos (theta) 2 sin^2(theta) - 1 b)Express as a function of sin (theta) or cos (theta)

    asked by Donovan on January 6, 2009
  85. Chemistry

    Did I do these right? Can someone let me know if I did them correctly? I had someone help me with the problems but know I want to make sure their the right answers? 1. Methane burns in oxygen according to the following equation: CH4 + 2O2 ----> CO2 + 2H2O

    asked by Jessie T on September 8, 2009
  86. trigonometry

    suppose a manufacterer of transistors believes that, on the average, one defective transistor occurs in every 100 transistors. a. find the probability that a batch of 20 transistors has 2 defectives. b. find the probability that a batch of 20 transistors

    asked by Rob on January 10, 2007
  87. English

    I'm having problems with containers? Can you please help me? Thank you. 1) I bought a 6-pack of eggs, a packet (?) of cow's milk cheese and 3,5 ounces (100 gr.) of cooked ham, a bottle of washing liquid and one of floor cleaner. 2) I also bought a two-pack

    asked by Henry2 on July 24, 2011
  88. STATISTICS HELP PLEASE

    Gender Math M 690 M 550 F 800 F 610 M 540 F 660 M 700 M 560 F 560 M 390 F 530 M 560 F 590 F 520 M 740 F 560 M 620 M 700 M 620 F 500 M 760 F 710 M 590 M 670 M 670 a. Determine whether the sample provides statistical evidence that males have higher Math

    asked by jabrony on November 30, 2011
  89. Math

    1. Yesterday Josh sold some boxes of greeting cards. If he sold 25 boxes in all, how many did he sell yesterday? 2. Jana baked some muffins. After she served 13 of them to her friends at brunch, she had 17 left. How many muffins did she make? 3. A scuba

    asked by Carmen on October 1, 2013
  90. physics

    Last two problems on the homework! please help with these 2. it helps when detailed explanations are given! thanks A 2 kg ball is thrown horizontally, at 5m/s, from a height of 5 m. How fast will it be moving when it contacts the ground? A 70 kg

    asked by 1 on June 29, 2015
  91. math,algebra

    They may want you to add the fractions and give the answer in forms of a fraction. in that case, you need to convert to common denominators before addineg. In that case 1/3 + 1/5 + 1/10 = (10 + 6 + 3) /30 = 19/30 5/6 - 3/5 = (25 - 18)/30 = 7/30 You answer

    asked by drwls on December 6, 2006
  92. priciples of teaching

    can you please explain every number or give an examples in every number under management of instruction on principles of teaching? 1.Understanding by the teacher of the basic human needs, such as food, security, belongings, and recognition, eliminates

    asked by rose on May 10, 2017
  93. physics

    i will begreatfull if u help me insolving the below problems: 1.)the time period of a pendulum clock on the surface of the earth is 6 sec.Find the timeperiod of the same pendulum on the moon.(g=9.8m/sec2) 2.)the time period of a pendulum is 6.28sec.Whay

    asked by srikar on May 17, 2012
  94. Statistics

    4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch,

    asked by Samantha on August 1, 2015
  95. statistics

    4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch,

    asked by Martin on August 14, 2015
  96. Statistics

    4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch,

    asked by Kendra on November 22, 2014
  97. society, please help

    I have to write an essay over society's biggest problem. It says: " In our society we face a number of problems, such as crime, poverty, and pollution. What do you think is the biggest problem we face in our society today, and why is it a serious

    asked by 12-year-old-poet on January 22, 2012
  98. PHYSICS ( PERIODIC MOTION)

    In a lab, a student measures the unstretched length of a spring as 12.9 cm. When a 113.6-g mass is hung from the spring, its length is 26.3 cm. The mass-spring system is set into oscillatory motion, and the student observes that the amplitude of the

    asked by MUSTAFA GHANIM on March 9, 2016
  99. Math

    1. There are 20 guests at a party. The host has 8 gallons of punch. He estimates that each will drink 2 cups of punch. If this estimate is correct, how much punch will be left over at the end of the party? 2. A typical lap around a track in the United

    asked by Patrick on November 16, 2015
  100. Chemistry

    The equation is: CuSO4(s) + Zn(s) -> Cu(s) + ZnSO4(aq) 3.22 g of powdered zinc is added to 200ml of 0.5M copper sulfate solution. What mass of copper is deposited? Hi guys. I am confused about the stoichmetry question. Q: The equation is: CuSO4(s) + Zn(s)

    asked by G on October 10, 2015