1. Chemistry

    Calculate the molarity of a solution prepared by dissolving 13.6 g ZnCl2 in 432 g H2O. Assume that the density of the solution is 1.00 g/mL. The molar mass of ZnCl2 is 136.29 g/mol and the molar mass of H2O is 18.02 g/mol.

    asked by SR23789 on September 15, 2017
  2. chemistry

    Solid lead(II) iodide was prepared by reacting 65.0 mL of a solution containing 0.218 M lead(II) ions with 80.0 mL of a solution containing 0.265 M iodide ions. If the actual yield of the reaction was 3.26 g, which choice is closest to the %yield of the

    asked by K on January 22, 2015
  3. Chem Urgent

    Volume of stock solution a. 5.0mL b.10.0mL c.15.0mL d.20.0mL Prepare 25mL of each of the four different dilute solution Concentration of stock- 1.01E-5 Calculate molarity for a,b,c,d Molarity=m1V1/V2 for a would the answer be 2.02E6?????

    asked by Aman on November 16, 2007
  4. physical science

    Does not settle on standing: I answered homogeneous mixture - solution and compound is this correct? Can separate when allowed to stand alone I answered heterogenous mixture * choices solution, compund, heterogenous mixture and homogeneous mixture

    asked by liz on October 6, 2007
  5. Physics

    the only part i cant figure out is the max static friction force that acts on the block. please help show me how to find it Suppose a block with mass 2.00 kg is resting on a ramp. If the coefficient of static friction between the block and the ramp is

    asked by sarah on May 21, 2011
  6. English

    I really have the following doubts. Can you see if my corrections are OK? Thank you. 1) He is expected by his friends (is wrong?) to be discharged today. I wish I hadn't got (Is this possible?) two tests tomorrow. 2) Do you always make breakfast by

    asked by Mike1 on April 17, 2011
  7. social studdies

    Who benifited the most from the FSA program A-State Goverment Workers B-White Farmers C-Black Tenants and Share croppers 🔄D-Farmers Union What Were some effects of the great depression? Select all that apply *2 points 🔄A-Roosevelt Introduced the New

    asked by Gavin Reed on February 20, 2019
  8. physics

    A box is pulled across a horizontal surface at a constant speed by a horizontal rope with tension T=30N. The coefficient of friction between the box and surface is uk = 0.05. 1. Calculate the work done by friction as the box moves 4 meters to the right. i

    asked by Jacob on April 13, 2010
  9. Social studies

    How did World War 2 affect life in Georgia? (Choose all that apply.) A. More Georgians were out of work than ever before B. Many people moved to the North or West C. People made sacrifices for the war effort. D. African american Georgians moved to the

    asked by Amber on March 16, 2016
  10. Physics. please help! due tomorrow!

    Let W1 represent the work required to accelerate an object on a frictionless horizontal surface from rest to a speed of v. if W2 represents the work required to accelerate the same object on the same surface from a speed of v to 2v, then which one of the

    asked by Matt on October 18, 2012
  11. physics

    An 8.00kg package in a mail-sorting room slides 2.00 m down a chute that is inclined at 53.0 degrees below the horizontal. The coefficient of kinetic friction between the package and the chute's surface is 0.400.Calculate the work done on the package by

    asked by Erin on March 6, 2008
  12. physics

    A pendulum is formed of a particle of mass 100g suspended from the end of an inextensible string of negligible mass and of length L=100cm. The pendulum is shifted by an angle of 60 degrees from its equilibrium position about a horizontal axis passing

    asked by vicky on September 21, 2016
  13. physics

    A pendulum is formed of a particle of mass 100g suspended from the end of an inextensible string of negligible mass and of length L=100cm. The pendulum is shifted by an angle of 60 degrees from its equilibrium position about a horizontal axis passing

    asked by vicky on September 21, 2016
  14. math solutions

    solve the equation abx=cy for each of following the variable x the variable a the variable c solve the equation ay/x the variable y the variable z the variable x solve each of following for variable y 3y=ab ab=cy ayc=bx bx/y=R zy/x=b

    asked by sherri on October 6, 2008
  15. chemistry

    1.If a container that is 1L has 1 mol of solid NACL , if you add more nacl will the concentration of solid increase? it should? because if you increase it to two mols it will become 2 mol/l right? so in a equillibrium system like nacl(s)-->

    asked by kevin on July 21, 2009
  16. Physics

    A 59.5 kg person, running horizontally with a velocity of +3.90 m/s, jumps onto a 12.2 kg sled that is initially at rest. (a) Ignoring the effects of friction during the collision, find the velocity of the sled and person as they move away. (b) The sled

    asked by Mary on February 28, 2007
  17. college chemistry

    a student determined the Ca^2+ ion content of a 100mL sample of calcium-fortified orange juice. After adding 2.0M HCl solution to the sample, the student filtered the juice to remove the pulp and other particulate matter. Then the tudent added Na2CO3

    asked by anne on October 8, 2012
  18. ENG 365 Issues in Literature

    I have a summary paper to do that is suppose to be 8-10 pages. The problem that I am having is where to get started. This is what the teacher want us to do. Relate your life in work, social responsibility, and/or individual responsibility to a literary

    asked by Anonymous on March 1, 2012
  19. Physics

    I'm having trouble relating Work, with Electric Field, with Kinematics. The question is asking: How fast and what direction is the particle moving, given: Disk: radius = 0.1m, surface charge density = 3.7mC/m2 Particle: 4.5 mC, mass = 75 mg accelerates

    asked by so CONFUSED! on February 14, 2010
  20. chemistry

    The vapor pressure of pure water at 70°C is 231 mm Hg. What is the vapor pressure depression of a solution of 115 g of the antifreeze ethylene glycol, C2H6O2, a nonvolatile compound, in 205 g of water? Use molar masses with at least as many significant

    asked by Brad on December 12, 2012
  21. chemistry

    the vapor pressure of carbon sulfide is 355.6 torr at 25 degrees Celsius. what is the vapor pressure of a solution prepared by dissolving 12.52 g naphthalene (C10H8, 128.2 g/mol) in 125.0 mL CS2 liquid (76.14 g/mol, 1.261 g/mL)? Assume the solution obeys

    asked by alexis on March 4, 2015
  22. Chem

    (a) The molar solubility of Ag2CrO4(s) at 35°C is 1.3 10-4 mol/L. Calculate Ksp. (b) If 0.0490 g of AgIO3 dissolves per liter of solution, calculate the solubility-product constant. (c) Using the appropriate Ksp value from Appendix D, calculate the

    asked by Rebekah on April 27, 2011
  23. Chemistry

    An aqueous solution of ethyl alcohol is made by transfering 1.32 mL of liquid ethyl alcohol to a 50.0 mL volumetric flask, and then adding enough water to fill the flask to the mark. What is the volume/volume percentage of ethyl alcohol in the solution?

    asked by Sasha on March 27, 2017
  24. Math (Quadratics)

    3. Solve for x in 8x^2 + 2x - 4 = 0 I have tried factoring, taking out a GCF then factoring, completing the square, and got a bunch of wrong answers. I thought we were supposed to complete the square, so maybe I'm just doing that wrong. I'm not looking for

    asked by Ariana on October 8, 2015
  25. Math

    The smallest real number in the solution set of 2x > 6 is 4. A) True B) False - The smallest real number in the solution set of 2x > 6 is 3. C) False - The smallest real number in the solution set of 2x > 6 is a number greater than 3. For example, 3.01 is

    asked by Michelle on October 4, 2011
  26. Math

    The smallest real number in the solution set of 2x > 6 is 4. A) True B) False - The smallest real number in the solution set of 2x > 6 is 3. C) False - The smallest real number in the solution set of 2x > 6 is a number greater than 3. For example, 3.01 is

    asked by Mary on October 4, 2011
  27. chemistry

    Oganic solvents are not suited to be heated with one of the followings: Oil Bath Electric hot plate Water bath Bunsen burner flame 2 Which of the following is not an inflammable liquid ? Water Ethanol Kerosine Benzene 3 These are some safety precausions

    asked by onyi on September 16, 2015
  28. physics

    The water skier in the figure is at an angle of 35degree with respect to the center line of the boat, and is being pulled at a constant speed of 15m/s . 1)If the tension in the tow rope is 90.0 , how much work does the rope do on the skier in 30.0 ? 2)How

    asked by JC on November 20, 2010
  29. college physics helpasap

    The water skier in the figure is at an angle of 35degree with respect to the center line of the boat, and is being pulled at a constant speed of 15m/s . 1)If the tension in the tow rope is 90.0N, how much work does the rope do on the skier in 30.0s ? 2)How

    asked by JU on November 20, 2010
  30. Ethical and Legal Issues

    Let’s start this discussion by providing examples of an ethical duty or ethical obligations you have encountered in your life. What are some examples of rules at WORK that might cause a conflict with your ethical standards? 1. What was that duty or

    asked by Anonymous on October 26, 2010
  31. Physics

    Suppose you must remove an average of 3.4 X 10 ^8 J of thermal energy per day to keep your house cool during the summer. If you upgrade from an old air conditioner with a COP of 2 to a new one with a COP of 6, by how many joules is the required mechanical

    asked by Erin on August 4, 2019
  32. chemistry

    what is the thermal energy change as 175.0g, of water drops from 75.00 dgrs C to 15.50 dgrs C??? q = mass H2O x specific heat water x (Tfinal - Tinitial). mass H2O = 175.0 g specific heat water = 4.184 J/g*C Tf = 15.50 Ti = 75.00 Solve for q. Check my work

    asked by crystine cole on April 11, 2007
  33. Physics

    Compute the initial upward acceleration of a rocket of mass 1.5 ✕ 104 kg if the initial upward force produced by its engine (the thrust) is 2.7 ✕ 105 N. Do not neglect the weight of the rocket. Pleas tell me the steps, I've tried getting the

    asked by Will on December 15, 2015
  34. precalc

    Given a square matrix M, we say that a nonzero vector v is an eigenvector of M if Mv=kv for some real number k. The real number k is called the eigenvalue of v with respect to M. 1. Let v be an eigenvector of the matrix M with eigenvalue k. Find a simple

    asked by katie on August 7, 2016
  35. Business Communications

    5: You are attending a professional conference and are privileged to be introduced to Caroline Peters. You know nothing about her except that she is an executive at a very successful company. You have and idea that you would like to talk over with her. How

    asked by Jay on March 5, 2011
  36. Chemistry

    1. As a research chimst, you are intrested in studying the extent and type of interactions in aqueous salt solution. As part of this study, you weight three samples of NaCl and dissolve each in 1.000kg H2O. You then measure the freezing temp. of each

    asked by Liz on March 5, 2012
  37. Physics relationship

    Let W1 represent the work required to accelerate an object on a frictionless horizontal surface from rest to a speed of v. if W2 represents the work required to accelerate the same object on the same surface from a speed of v to 2v, then which one of the

    asked by Cody on October 16, 2012
  38. English / Grammar

    Please help me word this sentence correctly: At its zenith, the depression saw nearly 25 percent of all workers and 37 percent of all non-farm workers completely out of work. I'm trying to say that at the peak of the depression, that's how many people were

    asked by Tiffany on August 10, 2014
  39. Chemistry

    A 100.0 mL sample of 0.300 M Ca(OH)2 is mixed with 100.0 mL of 0.700 M H3PO4 in a coffee cup calorimeter. If both solutions were initially at 35.0 degrees celsius and the resulting solution had a temperature that was recorded at 39.7 degrees celsius,

    asked by 2difficult on April 25, 2016
  40. Chemistry

    A calorimeter contains 21.0 mL of water at 14.0 degreesC. When 1.90 g of X (a substance with a molar mass of 70.0 g/mol) is added, it dissolves via the reaction X(s)+H_2O(l)reacts to make X(aq) and the temperature of the solution increases to 28.5degreesC.

    asked by Ellen on October 22, 2010
  41. Chemistry

    What are the functions of potassium hydroxide and tetraoxosulphate 6 acid and heated iron filing in the preparation of nitrogen from air. Describe the commercial preparation of nitrogen. Both hydrogen sulphide and sulphur 4 oxide decolourise acidified

    asked by Abigail Ibrahim on September 9, 2018
  42. Social Studies

    Can I have these answers checked? 1. Which of The following provides the definition of a nation? A. The Highest elected officials in a country B. The area ruled by an independent government**** C. A country with defined borders and foreign policy enforced

    asked by New Here on September 27, 2017
  43. Chemisty

    How do I solve what is the mass of a 32.5 mL sample of ethanol if the density of ethanol is .789 g/mL. I know Mass = Density * Volume. So 32.5 mL * .789g/mL = the mass, but I don't know how to solve that.

    asked by Brenda on August 26, 2013
  44. algebra3

    can u solve the equation 1)1.2x= 2.3x-2.2 2)[x-4]= 15 3)[13+2x]= 5 1) 1.2x = 2.3x - 2.2 2.2 = 2.3x - 1.2x 2.2 = 1.1x x = 2 2) x - 4 = 15 x = 15 + 4 x = 19 3) 13 + 2x = 5 2x = 5 - 13 2x = -8 x = -8/2 x = -4 it's all about getting the same variables to the

    asked by WOLF on January 30, 2007
  45. Math

    The following interval represents the solution of an absolute value inequality. Find an example of an absolute value inequality whose solution is described by this interval. [-2,1] please expalin

    asked by Help:( on March 19, 2010
  46. pharmacy tech

    3. You receive an order for 30 mL of 3% boric acid solution. The pharmacy has in stock a 1% and 5% boric acid solution in stock

    asked by katrina on December 21, 2015
  47. Chem 151

    A solution of ammonia and water contains 3.50×10^25 water molecules and 5.00×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?

    asked by Tyler on September 13, 2011
  48. Chemistry

    Find the ratio of the pH of solution (I) containing 1 mol of CH3COONa and 1 mol of HCl in 1L and solution (II) containing 1 mol of CH3COONa and 1 mol of CH3COOH in 1L

    asked by Sandu on October 11, 2016
  49. Chemistry

    How many liters of 12.3 molar NaOH stock solution will be needed to make 12.4 liters of a 1.2 molar NaOH solution?

    asked by Lindsey on May 1, 2011
  50. Chemistry Honors

    What volume of a 0.50 M MgSO4 solution will be needed to prepare 100.0 mL of a 0.20 M MgSO4 solution? A.250 mL B.100 mL C.0.250 mL D.40.0 mL

    asked by Tony on December 16, 2014
  51. Chem II

    In the question Consider a 0.90 M Al(NO3)3 solution. This solution has a nitrate ion concentration of . . . . How do you figure the nitrate ion concentration?

    asked by Ken on June 6, 2008
  52. chemistry

    A chemist wants to make 5.50 L of a 0.300 M lithium phosphate solution. What mass of lithium phosphate must be used to make this solution?

    asked by James on November 3, 2014
  53. physics

    A spiral staircase winds up to the top of a tower in an old castle. To measure the height of the tower, a rope is attached to the top of the tower and hung down the center of the staircase. However, nothing is available with which to measure the length of

    asked by Coreen on April 1, 2007
  54. math

    3. (TCO A) The following questions are worth 5 points each. Please show all work. a. Inflation is expected to average five percent for the long term and Mr. Smith earned $74,000 this year, how much must he earn in 20 years just to keep up with inflation

    asked by Steven on August 5, 2012
  55. engineering

    ANPR system takes two images of each passing car. each image is 840 pixels wide and 320 pixels high. each pixel is stored in one byte. on average six car pass per minute. if each uncompressed image is sent back to the control centre for processing, what is

    asked by kenji86 on April 19, 2010
  56. Chemistry(Please help)

    What is the molar solubility of barium phosphate in a 0.282M barium acetate solution? If I set up and ice table I would have 0.282M - X = ? Would I use the molar mass of barium acetate to complete the equation to find X? Ba3(PO4)2 ==> 3Ba^2+ + 2PO4^3-

    asked by Hannah on April 28, 2012
  57. Chemistry

    he experiment is a sequence of Chemical Reactions. Procedure part A preparation fo copper (II) Hydroxide-get a solution of copper(II)nitrate. measure 25ml of solution. to blue solution add 2mL of concertarted NaOH while stirring. Let mixture settle and use

    asked by Missy For Bob on September 15, 2010
  58. math

    Jane is taking a class and asks you to help her figure out what her last grade must be in the class to get a 85 in the class. She tells you the following calculation is used to find your final grade: 75+85+90+X ___________ > 4 x is her last score which has

    asked by Jennifer on November 30, 2011
  59. algebra

    Jane is taking a class and asks you to help her figure out what her last grade must be in the class to get a 85 in the class. She tells you the following calculation is used to find your final grade: w2d2 x is her last score which has not been taken.

    asked by Jennifer on November 29, 2011
  60. 7th grade math

    The hypotenuse of a right triangle is 10 centimeters and one of the legs is 6 centimeters. the leg to the very left is 6 cm and the leg to the top is 10 cm. the bottom leg has a x for unknown. My teacher gave me the answer since I couldn't figure it out

    asked by Dingbat on January 27, 2013
  61. physics

    When a 1.3kg mass was attached to a spring, the spring stretched 21cm from its equilibrium position. The mass spring system was then set into oscillatory motion by providing the mass with an initial velocity. Its oscillatory motion is then described by the

    asked by Hannah on November 27, 2014
  62. ALGEBRA

    The table below shows two equations: Equation 1 |3x - 1| + 7 = 2 Equation 2 |2x + 1| + 4 = 3 Which statement is true about the solution to the two equations? Equation 1 and equation 2 have no solutions. Equation 1 has no solution and equation 2 has

    asked by HELP PLEASE on October 5, 2014
  63. Math

    Help with these problems would be greatly appreciated: 1.Find the definite integral of dx/(x(1+ln(x))from e^6 to 1. 2. Solve for x in terms of k for log[2,x^6)+log[2,x^10=k. (its log base 2) 3.Solve log base 3(log base 3, x)=-2

    asked by Angelina on January 30, 2009
  64. Math

    Hands on:multiply with 0 and 1 1/ Jon has 4 fishbowls. there are 5fish in each bowl . How many fish does Jon have in all? Answer,, 4x5=20 2/peter threw a basketball 12 times. It missed the basket every time. Write a muitiplication sentence to show peter's

    asked by Nawaf on November 18, 2013
  65. Georgia History

    1. Which of the following describes the Puritans? A) didn't have much success as planters B) made Sunbury into a thriving port*** C) came from the backcountry of Virginia D) came from Pennsylvania by way of North Carolina 2. Georgia’s slave code was

    asked by Sami on September 17, 2016
  66. math

    Jane is taking a class and asks you to help her figure out what her last grade must be in the class to get a 85 in the class. She tells you the following calculation is used to find your final grade: w2d2 x is her last score which has not been taken.

    asked by Jennifer on November 29, 2011
  67. Calculus

    A section of highway connecting two hillsides with grades of 6% and 4% is to be build between two points that are separated by a horizontal distance of 2000 feet. At the point where the two hillsides come together, there is a 50-foot difference in

    asked by Jon on December 3, 2007
  68. Calculus

    A section of highway connecting two hillsides with grades of 6% and 4% is to be build between two points that are separated by a horizontal distance of 2000 feet. At the point where the two hillsides come together, there is a 50-foot difference in

    asked by Jon on December 4, 2007
  69. physics

    A car of mass 1200kg accelerates from rest to a speed of 8.0ms in a time of 2.0s. a)calc the forward driving force acting on the car while it is accelerating. b)At high speeds the resistive frictional force F produced by the air on a body moving with

    asked by Shanti on January 19, 2012
  70. solar energy please help

    In this section, we talked about combining a solar cell with a photoelectrode to form a photoelectrochemical device. Why do we add a solar cell in the system? a)Because the photoelectrode is not able to produce any voltage difference to drive the reaction

    asked by hitesh on November 6, 2013
  71. algebra

    the new school has exactly 1000 lockers and 1000 students. on the first day of school, the students meet outside the building and agree on the following plan: the first student will enter the school and open all of the lockers. the second student will then

    asked by Bri on January 12, 2011
  72. Probability

    In a 1970’s game show, a contestant was given a choice of three doors of which one contained a prize. The other two doors contained gag gifts like a chicken or a donkey. After the contestant chose an initial door, the host of the show then revealed an

    asked by Lisa on April 25, 2011
  73. Probability

    In a 1970’s game show, a contestant was given a choice of three doors of which one contained a prize. The other two doors contained gag gifts like a chicken or a donkey. After the contestant chose an initial door, the host of the show then revealed an

    asked by Lisa on April 24, 2011
  74. Chemistry

    A solution is 0.20 M in Cd2+ and 0.20 M in Ca2+. NaOH solution is added slowly through a burette. Ca(OH)2 (s) Ca2+ (aq) +2OH (aq) Ksp= 5.5*10^-6 Cd(OH)2 (s) Cd2+ (aq) +2OH (aq) Ksp= 2.5*10^-14 Calculate the concentrations of hydroxide ion, calcium ion, and

    asked by Sally on April 5, 2018
  75. chemistry

    a student mixes 4 reagents together thinking that the solution will neutralize each other . The solution is mixed together are 50 ml of 0.100 M of HCL and 100 ml of 0,200 M of nitric acid 500 ml of 0.0100 M ca hydroxide and 200 ml of 0.100 M rubidium

    asked by mathew on September 27, 2014
  76. Chemistry-dilutions

    I have a 2000ppm benzoic acid solution.I want to prepare a 20ppm benzoic acid solution.Is it better to 1) do serial dilutions i.e. from 2000 to 200 to 20ppm or 2) prepare 20ppm standard fresh when required( take 10ul of 2000ppm stock and top up to 1ml in a

    asked by chloe on September 11, 2010
  77. AP Calculus

    Consider the curve given by x^2+4y^2=7+3xy a) Show that dy/dx=(3y-2x)/(8y-3x) b) Show that there is a point P with x-coordinate 3 at which the line tangent to the curve at P is horizontal. Find the y-coordinate of P. c) Find the value of d^2y/dx^2 (second

    asked by Leanna on January 26, 2011
  78. math power series(please helpassessment tomorrow)

    The exponential function can be represented as an infinity power series as follows. e^x=1 + x/1! + x^2/2! + x^3/3!+⋯,-∞

    asked by bryan on May 2, 2017
  79. Business Finance

    Your firm is contemplating the purchase of a new $869,500 computer-based order entry system. The system will be depreciated straight-line to zero over its 5-year life. It will be worth $84,600 at the end of that time. You will be able to reduce working

    asked by Leigh on December 4, 2010
  80. Chemistry

    Consider the titration of 20.0mL of 0.300M acetic acid, HAc, with 0.150M NaOH solution. Ka=1.75*10^-5 HAc + NaOH ---> NaAc + H2O What is the composition of the solution at the equivalence point of the titration? Give both the formula of the compound and

    asked by Jonah on May 1, 2015
  81. Chem wondering how to set it up

    1.) A biochemistry student wants to make 4 liters of a phosphate solution using 48.6 g Na2HPO4 (FW=141.96) What is the concentration of this solution? 2. When she reaches the storeroom she finds that there is no Na2HPO4, however there is a bottle of

    asked by Jon on September 16, 2013
  82. Chem still confused

    1.) A biochemistry student wants to make 4 liters of a phosphate solution using 48.6 g Na2HPO4 (FW=141.96) What is the concentration of this solution? 2. When she reaches the storeroom she finds that there is no Na2HPO4, however there is a bottle of

    asked by Jon on September 16, 2013
  83. General Chemistry

    Vinegar is a 5.0% solution by weight of acetic acid in water. Given that the pH for vinegar is 2.41 and that Ka= 1.8E-5 and the density s 1.00g/mL, what is the percent dissociation of acetic acid in vinegar? I know the % dissociation equals the amount

    asked by Matt on February 27, 2008
  84. programming

    3. Create the logic for a program that accepts input values for the projected cost of a vacation and the number of months until vacation. Pass both values to a method that displays the amount you must save per month to achieve your goal.

    asked by jeff on May 13, 2014
  85. science

    Lilian's car won't start. She is using the scientific method to determone the cause. The car won't jumpstart so the battery is not the casue of the problem. What should she do next? a) run another experiment b) form another hypothesis c) draw another

    asked by Happy Labor Day!!!!!!!!!!! on September 6, 2010
  86. physics

    Given a square of sidelength a = 5 cm. We place a charged particle at each corner, three of them carry + 2 nC of charge and one carries the same amount of negative charge. What is the magnitude of the electric field at the center of the square? I don't

    asked by jude on February 6, 2010
  87. Business Math

    The Tao Inc. purchased an asset for $170,000 with a salvage value of $8,500 have a useful life of four years. Find the depreciation expense for the first year using the 150% declining blance method. a. $63,750 b. $63,500 c. $63,250 or d. $63,000

    asked by LaDonna on June 14, 2013
  88. Chemistry

    I am supposed to name this using IUPAC method for binary compounds (i think) arsenic(111) sulfide silicon tetraiodide antimony (111)bromide ammonia gas lead(11) and the things in the brackets are supposed to be the roman numerals

    asked by Sam on February 13, 2014
  89. Statistics

    In the past, the mean running time for a certain type of flashlight battery has been 8.0 hours. The manufacturer has introduced a change in the production method and wants to perform a hypothesis test to determine whether the mean running time has

    asked by Justice on December 17, 2014
  90. Hydrology

    I am having difficulty analyzing my lab data. I don't know whether to analyze a chart or use calculations to define the data. I am trying to use the Cooper-Jacob method. I also need to calculate transmissivity and storativity, but am having difficulty

    asked by Max on April 7, 2016
  91. Financial accounting 2

    If a building cost $600,000, has an estimated residual value of $240,000, has an estimated life of 36 years, and is depreciated by the straight-line method: a) What is the annual depreciation? b) what is the book value at the end of the 20th year?

    asked by MAry on September 3, 2012
  92. SCIENCE?CHEMISTRY***

    Am using the inventory method at moment but am stuck on how fill i the inventory for __Agl+__Fe2(CO3)3--> __Fel3+__Ag2CO3 I think the brackets are throwing me Hows this element b4 after ------------------------------------ Ag 1 2 l 1 3 Fe 6 1 CO 3 3 I

    asked by ANDY on May 16, 2010
  93. maths

    If a boy standing on the assembly ground looks at tje school flag from an angle of 32°and the length of the pole is 90cm.find the distance of the pole from the boy,to the nearest signifant figures using elevation and depression method

    asked by favour on August 5, 2019
  94. Calculus

    A large tank is filled with 200 gallons of pure water. Brine containing 1 pound of salt per gallon is pumped into the tank at the rate of 5 gallon per minute. The well-mixed solution is pumped out at the same rate. (a) Find the number A(t) of pounds of

    asked by Thomas on November 23, 2009
  95. Chem II

    Which of the follwoing gives the molarity of 17.0% by mass solution of sodium acetate (molar mass = 82.0 g/mol) in water. The density of the solution is 1.09 g/mL. OK - I know that to figure molarity is moles divided by liters. This is confusing me because

    asked by Ken on June 4, 2008
  96. Science

    A vitamin C tablet was dissolved in 50.0 mL of water. The resulting solution was titrated to the equivalence point with 28.5 mL of 0.100 M I3− solution. What is the starting mass of the tablet assuming the tablet is 100% vitamin C? I found the moles in

    asked by Clay on September 21, 2015
  97. Math

    A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. 1. What is the probability of selecting a purple marble and then a white marble? 2. What is the

    asked by Rose on May 29, 2018
  98. Math-please help

    A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. 1. What is the probability of selecting a purple marble and then a white marble? 2. What is the

    asked by Rose on May 29, 2018
  99. chemistry

    An aqueous solution of silver nitrate contains 5.00 g of silver nitrate. To this solution is added sufficient barium chloride to precipitate all the silver as silver chloride. What mass, in grams, of dry silver chloride can be obtained?

    asked by Erika on September 21, 2008
  100. Chemistry

    What is the maximum mass(g) of KCL that can be added to 1.00L of a 0.0100 M lead(ii) chloride solution without causing any precipitation of PbCl2? Assume the additional KCl does not affect the volume of the solution. For, PbCl2, Ksp=1.6x10^-5 Personally

    asked by Alex on May 5, 2016

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