1. chemistry help

    In the following questions, assume that no excess distilled water was added from a wash bottle during the titration of 10.00 mL of vinegar with your standardized solution of NaOH. A. calculate the pH of vinegar. B. what was the pH of the solution after

    asked by jk on April 1, 2015
  2. chemistry

    In the following questions, assume that no excess distilled water was added from a wash bottle during the titration of 10.00 mL of vinegar with your standardized solution of NaOH. A. calculate the pH of vinegar. B. what was the pH of the solution after

    asked by jk on April 1, 2015
  3. Chemistry

    i. Which of the following solutions has the lowest pH (more acidic). Explain you answers. a. a 0.1 M solution of a strong acid or a 0.1 M solution of a weak acid. b. a 0.1 M solution of an acid with Ka=2×10-3 or one with Ka=8×10-6 c. a 0.1 M solutions of

    asked by m on April 7, 2013
  4. statistics

    A mini-computer system contains two components, A and B. The system will function so long as either A or B functions. The probability that A functions is 0.95, the probability that B functions is 0.90, and the probability that both function is 0.88. What

    asked by Paula on March 5, 2011
  5. algebra

    Solve. Simplify your answer. Type an exact answer using radicals as needed. y^2 + 31 = 12y Solution y = {8.236067978, 3.763932022} 1. y =(12-√20)/2=6-√ 5 = 3.764 2. y =(12+√20)/2=6+√ 5 = 8.236 Which would be the correct way to answer this equation,

    asked by slomo on February 3, 2015
  6. Chemistry

    What is the pH of a 1.0E-8 M solution of HCl? Please note that you cannot simply add the contribution of H+ ions from the autoproteolysis of water and the contribution from the dissociation of HCl. You will need to use the quadratic equation to solve this

    asked by Joel on September 3, 2010
  7. "Given Molality, calculate..."

    "Given: An aqueous solution of C6H12O6 with a density of 1.18 g/ml" I) Calculate Molarity 1) It firsts asks me to, "State the moles of solute" 2) Calculate the mass of the solute in grams - I think I can do this if I know how to get #1 3) Later it also

    asked by Rachel on November 19, 2006
  8. Chem

    The hydrolysis of sucrose into glucose and fructose in acidic water has a rate constant of at 25 degrees C. Assuming the reaction is first order in sucrose, determine the mass of sucrose that is hydrolyzed when 2.60 L of a 0.150 M sucrose solution is

    asked by Katherine on February 28, 2010
  9. Biology

    1) Why is it appropriate to call the endomembrane system a "system?" 2) The selective permeability of biological membranes is dependent on _______________. 3) Why is it unusual for a phosphlipid molecule to flip from one face of the membrane to the other?

    asked by Dexter on January 9, 2010
  10. LA HELP!!!!

    PLZ HELP! 1. Part A In "All Together Now," Barbara Jordan's main purpose is to persuade readers that a tolerant society is best created by working on a small scale.*** inform readers of the recent history of the civil rights movement in the United States.

    asked by Agal on November 28, 2016
  11. math

    Farhan is in a hurry to tidy up. without looking at the cases of 3 cds, farhan just puts the cds into the cases. how many different ways can the 3 cds be put into the cases? please show me what work you use to do this? im super confused. thx

    asked by nicole on January 18, 2011
  12. Math

    Mary has 2/3 cup of chocolate chips. A cookie recipe calls for 1/2 cup of chocolate chips per batch. How many batches can bury make using all of her chocolate chips? Show your work and

    asked by Anonymous on April 14, 2016
  13. Algebra

    2 pumps can fill a water tank in 45 minutes when working together. Alone, the second pump takes 3 times longer than the first to fill the tank. How long does it take the first pump alone to fill the tank? Show all work

    asked by Anne on October 9, 2011
  14. MATH !

    Farhan is in a hurry to tidy up. without looking at the cases of 3 cds, farhan just puts the cds into the cases. how many different ways can the 3 cds be put into the cases? please show me what work you use to do this? im super confused. thx

    asked by Anonymous on January 18, 2011
  15. chemistry

    Aspirin tablet, mass of tablet= 0.4149 g concentration of iron III salicylate complex = 3.997E-4, What is the concentration of ASA in the original solution? What is the mass of ASA in the original solution? The procedure was as follows: accurately weigh by

    asked by Emma on November 20, 2012
  16. chemistry

    Aspirin tablet, mass of tablet= 0.4149 g concentration of iron III salicylate complex = 3.997E-4, What is the concentration of ASA in the original solution? What is the mass of ASA in the original solution? The procedure was as follows: accurately weigh by

    asked by Emma on November 20, 2012
  17. Chemistry

    Aspirin tablet, mass of tablet= 0.4149 g concentration of iron III salicylate complex = 3.997E-4, What is the concentration of ASA in the original solution? What is the mass of ASA in the original solution? The procedure was as follows: accurately weigh by

    asked by Emma on November 20, 2012
  18. Science help ASAP

    1. In which way does the circulatory system rely on the skeletal system? Glucose is secreted by compact bone as an energy source for blood. Spongy bone stores minerals needed by blood cells. Bones provide a source of oxygen to blood. Blood cells are

    asked by Anonymous on May 5, 2014
  19. physics

    A 280 kg piano slides 4.3 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. Calculate: (a) the force exerted by the man, (b) the work done

    asked by pauleen on October 7, 2009
  20. Help Please!!!- Physics

    A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting

    asked by Jacob on November 22, 2013
  21. physics

    A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting

    asked by Ashley on November 21, 2013
  22. Chemistry

    Consider a 67-g chunk of ice (∆Hfus = 6.0 kkJ/mol) in a beaker immersed in a water bath. To produce just enough heat to melt the ice, how many moles of solid NaOH (∆Hsoln = -445.1 kJ/mol) must you dissolve in the water bath? Please show all work.

    asked by Stacie on June 19, 2013
  23. Physics

    The occupants of a car traveling at a speed of 30 m/s note that on a particular part of a road their apparent weight is 15% higher than their weight when driving on a flat road. a. Is that part of the road a hill or a dip? b. What is the vertical curvature

    asked by Jorge on December 30, 2016
  24. physics

    A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting

    asked by Ashley on November 21, 2013
  25. Physics

    A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting

    asked by Ashley on November 20, 2013
  26. Algebra 11th

    Activity 1: Graphing To fill an order for Sizzlin' Sauce sauces, you bought 1050 green peppers and 1200 hot chili peppers. • Write and graph a system of inequalities to represent how many pints of each kind of sauce you can make. Use the recipes below.

    asked by John on December 25, 2013
  27. Geometry

    ted skated through one of the face off circles at a hockey rink. His path through the circle is shown in the figure. Given that the face off circle is 15 feet in diameter what distance within the face off circle did Ted travel?? If you google this there

    asked by Anonymous on February 23, 2016
  28. math

    What inequality those this graph show: file:///C:/Users/751017272/Desktop/y%20ilt%202x%20plus%202.png (Copy and paste it) Can you show me how you get your answer also? so i can write it in my notes.

    asked by PleaseHelp(Again) on September 20, 2016
  29. math

    Evan is painting a stool that has a cylindrical seat and four rectangular prism legs. The seat has a diameter of 10 inches and a height of 3 inches. Each leg is 3 inches by 3 inches by 12 inches. How much area will Evan have to paint. use 3.14 for pi show

    asked by datavia on August 19, 2014
  30. physics

    A sphere of mass 78 kg is attached to one end of a rope as shown in the figure below. It is found that the rope does an amount of work W = 3550 J in pulling the sphere upward through a distance 4.6 m. Find the work done by the force of gravity on the

    asked by Dan on October 26, 2015
  31. Math

    1) 60 meters of fencing are needed to fence in a square lot. What is the area of the lot? a) 3600 m^2 b) 900 m^2 c) 225 m^2 d) 15 m^2 2) A can do a piece of work in r days and B, who works faster, can do the same work in s days. Which of the following

    asked by Lenovo on July 24, 2014
  32. Math

    A design on a balloon is 2 cm wide when the balloon holds 47 cm^3. How much must the balloon hold for the design to be 6 cm wide? I'm confused about how to solve this. Could someone please show me the steps?

    asked by Annie on May 30, 2011
  33. Physics Help Please

    Issac has to do 1000J of work on a 5kg box, and all the work he did simply went into lifting it above the ground. How high above the ground will the box be when all the work has been done?

    asked by Marissa on November 28, 2011
  34. PHSC

    Explain the difference between the everyday use of the word "work" and the physical (physics related)use of the word "work".How is energy related to work?

    asked by brandy on June 26, 2012
  35. Algebra

    Evaluate sqrt7x (sqrt x-7 sqrt7) Show your work. sqrt(7)*sqrt(x)-sqrt(7)*7*sqrt(7) sqrt(7*x)-7*sqrt(7*7) sqrt(7x)-7*sqrt(7^2) x*sqrt 7x-49*x ^^^ would this be my final answer?

    asked by Alexa on February 17, 2016
  36. algebra

    solve for the indicated letter. y=5x, solve for x d=55t, solve for t

    asked by Lisa on June 7, 2014
  37. Algebra II

    1.Solve: x(x2 + 16) = 0 2.Solve: 2x3 + 6x2 – x – 3 = 0 3. Solve: 2x = x2

    asked by Christian on January 11, 2008
  38. Math

    Solve P=P(base 0)e^kt Solve for t? I have no idea how to solve this

    asked by Eiban on October 17, 2014
  39. algebra

    solve the equation for x -2(2x-2)=2x for y 9x+y=9 solve theinequality 2x-6

    asked by gary on November 8, 2014
  40. calculus

    answer the questions about the following function f(x)= 10x^2/x^4+25 a. is the point (-sqrt 5,1) on the graph b. if x=3, what is f(x)? what point is on the graph of f? c. if f(x)=1, what is x? what points are on the graph? d. what is the domain of f? e.

    asked by Help--Please help!!!! on December 16, 2012
  41. Chemistry

    A compound is known to be a cesium halide, CsX. If 3.00 grams of the salt is dissolved in exactly 100.0 grams of water, the solution freezes at -0.735°C. What is the chemical formula for the salt? i know it would be -0.735= -1.86 * m m= 3g/ X g/mol/kg

    asked by Susy on February 20, 2014
  42. Math

    did i work these problems right if not could some one show me how to work all three of them. 8.Represent the quantity with a real number: An altitude of 400 feet (ft) above sea level: 400 is a real number. I could also use 4 as a real number representing a

    asked by Gertrude Sanders on November 9, 2008
  43. PHYSICS

    You push your physics book 2.20m along a horizontal tabletop with a horizontal push of 2.20N while the opposing force of friction is 0.500N . How much work does your 2.20N push do on the book? How much work does the friction force do on the book? How much

    asked by JADE C. on August 30, 2014
  44. Geometry

    Jason designed an arch made of wrought iron for the top of a mall entrance. The 11 segments between the two concentric circles are each 1.25 m long. Find the total length of wrought iron used to make the structure. Round the answer to the nearest meter.

    asked by Alexa on October 2, 2015
  45. Chemistry

    A buffer solution is prepared by mixing 50.0 mL of 0.300 M NH3 with 50 mL of 0.300 NH4Cl. The pKb of NH3 is 4.74. NH3 + H2O-> NH4+ +OH- 7.50 mL of 0.125 M HCl is added to the 100 mL of the buffer solution. Calculate the concentration of NH3 and NH4Cl for

    asked by Dee on April 10, 2014
  46. American Government

    4. What is the strongest argument for supporting a jury system? a. to ensure that regional differences don't create differences in the law b. to ensure fairness through consideration of the verdict by more than one person*** c. to check the power of the

    asked by Elise Bedford on April 18, 2017
  47. Anatomy and Physiology

    Movement of bones in the skeletal system is made easier because of the existence of connections between bones called. JOINT Organs arranged in such a way that together they can perform a more complex function than can any one organ alone are called.

    asked by Erica on January 12, 2011
  48. chem

    a.)How many moles of NaOH are required to prepare 2.00L od 0.380M solution? answer is 0.760 mole of NaOH (mole/l * 2.00L) b.)What will be the molarity of a solution if 3.50 g of KOH are dissolved in water to make 150.0 mL of solution? answer is 0.52 M KOH

    asked by Angel Locsin on November 30, 2012
  49. CHEM-KSP/KA PROBLEMS

    really don't quite understand how to set up a caluculation to figure out whether a precipitate will form and i'm struggling with the second half too! When 25.75 mL of 0.00826 M lead II nitrate is mixed with 75.10 mL of 0.0183 M sodium chloride solution,

    asked by Sigurd on April 8, 2008
  50. physics

    2 forces pull horizontally on a heavy box. force b is directed 20 west of north and pulls twice as hard as force a. the resultant of these two pulls is 400N directly northward. using vector components to show two possible solutions to this problem: a. what

    asked by courtney on August 21, 2015
  51. Precalculus help fast

    a farmer has available 1032 feet of fencing and wishes to enclose a rectangular area. If x represents the width of the rectangle for what value of x is the area the largest A) 256.5 feet b) 258 feet c) 256 feet d) 257 feet please show work! i need help

    asked by Arielt on March 29, 2010
  52. Precalculus

    a farmer has available 1032 feet of fencing and wishes to enclose a rectangular area. If x represents the width of the rectangle for what value of x is the area the largest A) 256.5 feet b) 258 feet c) 256 feet d) 257 feet please show work! i need help

    asked by Help now fast due tommorow!!!!!!!!!!!!!!!!!!!!!!!! on March 29, 2010
  53. Math

    Evan is painting a stool that has a cylindrical seat and four rectangular prism legs. The seat has a diameter of 8 inches and a height of 2 inches. Each leg is 2 inches by 2 inches by ten inches. How much area will Evan have to paint? Use three point one

    asked by Matthew on January 20, 2012
  54. Precalculus

    a farmer has available 1032 feet of fencing and wishes to enclose a rectangular area. If x represents the width of the rectangle for what value of x is the area the largest A) 256.5 feet b) 258 feet c) 256 feet d) 257 feet please show work! i need help

    asked by Help now fast due tommorow on March 29, 2010
  55. Chemistry (concentration)

    H2SO4(aq) + 2LiOH(aq) → Li2SO4(aq) + 2H2O(l) 3.2 moles of LiOH enter the reaction and are fully consumed. The molar mass of Li2SO4 is 110 g/mol. The final aqueous solution has a volume of 4.0 L. What is the final concentration of Li2SO4 in g/L? 44

    asked by Summer on April 11, 2018
  56. computer programming

    : Create a program like KBC game show where program ask user 3 different question one after another and the user should answer them. If the answer are correct then pop up the message as “you got the right answer” and must ask user does he/she wants to

    asked by ravi on January 21, 2012
  57. Estimating DecimalsProducts and Quotients

    Determine whether each product or quotient is resonable.If not resonable,find a resonable result. 1. 62.77(29.8)=187.0546 2.16.132/2.96=54.5 The numbers are correct except for the decimal places. The first one looks like 60*30 or 1800, so determine where

    asked by Bowier4 on October 9, 2006
  58. Computer Science

    I need to write a program to solve for the following: Suppose that the file USPRES.txt contains the names fo the frist 43 United States presidents and the file USSENATE.TXT contains the names of all former and present US Senators. Write a program with

    asked by Wally on March 4, 2011
  59. math

    The denominator of a fraction is 4 more than the numerator. If both the denominator and the numerator are increased by 1, the resulting fraction equals 1/2. What is the original fraction? **Need to show all work** Thanks for the help.

    asked by Dylan on March 26, 2011
  60. Algebra

    The height of the flagpole is three fourths the height of the school. The difference in their heights is 4.5 m. What's the height of the school? Choices for school's height: 18, 20, 24. Please show work

    asked by Anonymous on August 23, 2012
  61. Algebra

    The height of the flagpole is three fourths of the height of the school. The difference in their heights is 4.5 m. What's the height of the school? Choices for school's height: 18, 20, 24. Please show work

    asked by Anonymous on August 23, 2012
  62. Geometry

    How much more pizza is in a 12-in. diameter pizza than an 8-in. diameter pizza? Round your answer to the nearest hundredth. Be sure to show all work and label your answer!

    asked by Maria on April 7, 2017
  63. Algebra I

    The cost of 4 scarves and 6 hats is $52. The cost of two hats is $1 more than the cost of one scarf. What are the costs of one scarf and one hat? Please show me how to set this up and work it.

    asked by Jane on February 21, 2013
  64. algebra

    In 2020 a​ city's budget is projected to be ​$24 million. This is approximately 12/7 of the 2000 budget. What was the​ city's budget in​ 2000? please show all work

    asked by merna on September 13, 2016
  65. math

    In a concert hall, 60% of the seats were taken. 520 seats were empty. What is the total number of seats in the concert hall? Show your work

    asked by mav on October 1, 2018
  66. chem lab

    when an aqueous solution suspected of containing BA2+ or Pb2+ or both is mixed with sulfuric acid a precipitate forms. In another test, when the original solution is mixed with an aqueous solution of sodium sulfide no precipitate forms. What do these two

    asked by natash on March 25, 2008
  67. Chemistry

    In a student's experiment, when 40 mL of 6% (w/w) hydrogen peroxide solution was reacted with 10 mL 0.5 M FeCl3 solution, a ΔrH of -3,382 J was calculated. Calculate ΔH for this reaction in kJ mol-1. Give your answer to 2 decimal places, do not include

    asked by Anon on April 19, 2016
  68. science(Chemistry)

    Calculate the concentration of the NaOH solution. If 30,0cm3 of a standard oxalic acid[(COOH)2] solution of concentration 0,5 mol.dm-3,is used to neutralize 25,0 cm3 of a sodium hydroxide (NaOH) solution. The balanced chemical equation for the reation is

    asked by Ntombikayise on July 14, 2011
  69. Chemistry

    A buffer solution is prepared by adding 14.37g of NaC2H3O2 and 16.00g of acetic acid to enough water to make 500mL of solution. What is the initial concentration of C2H3O2 in the solution? Ka(HC2H3O2)=1.8e-5 HC2H3O2 = H3O+ + c2h3O2 the molar mass of

    asked by Hannah on April 14, 2012
  70. Co-op

    I have to writeabout the work setting and work environment of a pharmacy technician... I am allowed to copy and paste from a website as long as you reference it so I did... but all in all this is what I wrote.: Work environment: Pharmacy technicians work

    asked by Katelyn on January 6, 2013
  71. passing on species

    I have to write an essay. I need some suggests as to where to start or some ideas as to what to write about. The topic is: One main biological objective for any living organism is to continue its species by reproducing and passing along genetic info.

    asked by Liz on June 27, 2009
  72. Alg 1

    The owner of a hair salon charges $20 more per haircut than the assistant. Yesterday the assistant gave 12 haircuts. The owner gave 6 haircuts. The total earnings from the haircuts were $750. How much does the owner charge for a haircut? Solve by writing

    asked by Emma on January 30, 2012
  73. Algebra

    The owner of a hair salon charges $20 more per haircut than the assistant. Yesterday the assistant gave 12 haircuts. The owner gave 6 haircuts. The total earnings from haircuts were $750. Hw much does the owner charge for a haircut? Solve by writing and

    asked by Cierra on February 24, 2013
  74. gr 11 Math

    Solve for x 2^x+1 - 2^x = 112 Put this in exponent form: (3square root of x) ( square root of 3 cubed) Put into equation form: Horizontal stretch of 2, up 3, left 6, reflection on x-axis. Please help me with these three so I can work on the rest using

    asked by Nancy on April 18, 2013
  75. Math

    Solve for x 2^x+1 - 2^x = 112 Put this in exponent form: (3square root of x) ( square root of 3 cubed) Put into equation form: Horizontal stretch of 2, up 3, left 6, reflection on x-axis. Please help me with these three so I can work on the rest using

    asked by Nancy on April 18, 2013
  76. Math- fraction equations

    How would I solve this equation? d-1 = -1 1 ____ ___ 4 2 (d-1) divided by 4 = -1 and 1/2 Thanks, Ok, I'll set up your problem this way: (d-1)/4 = -1 1/2 -1 1/2 is the same as -3/2. Therefore: (d-1)/4 = -3/2 Multiply each fraction by a common denominator,

    asked by Sarah on March 6, 2007
  77. Math

    I have a math question I am stuck on. It is on the applications of linear systems. This is the question: A club raised 5000$ for a trip, they invested part of the money into a savings account with 4% interest, they put the rest of the money into a

    asked by Vanessa on December 10, 2018
  78. math-please help,need quickly

    loga(x-5)-loga(x+9)=loga(x-7)-loga(x+9) all the a's are lower please show work

    asked by anonymous on January 9, 2013
  79. Chemistry

    Calculate the molar concentration for each of the following. a)The concentration of a brine solution containing 225 g for pure sodium chloride dissolved in 4.00 L of solution. b)The volume that must be added to 4.2 mol of magnesium chloride to make a 0.045

    asked by Lyn on November 22, 2015
  80. math

    Please help, 1) How do you solve 2017^2017 without a calculator? 2) What is the last digit of the solution to this problem: 2017^(2017^2017)? Thank you!

    asked by Onet on March 10, 2017
  81. english letter

    Hello everybody! Today a I have to write a complain letter to "my"boss.I should write about my difficulties,and about what's bothering me. In the letter I should propose a solution as well. The situation is: Me(Julie,47 years old)has worked as a secretary

    asked by Lulu on April 14, 2010
  82. physics

    please show me a simple formula to solve this find the final equilibirum temperature when 10.0 g of milk at 10.0degC is added to 1.60 * 10^2 g of coffee with a temperature of 90.0degC. assume the specific heats of coffee and milk are the same as for water

    asked by Bella on February 22, 2009
  83. Physics

    To supply the plumbing system of a New York office building, water needs to be pumped to a tank on the roof, where its height will provide a "head" of pressure for all the floors. The vertical height between the basement pump and the level of the water in

    asked by Steven on June 15, 2012
  84. Chemistry

    the lead (II) nitrate in 25.49 ml of a 0.1338M solution reacts with all of the aluminum sulfate in 25.00 ml solution. What is the molar concentration of the aluminum sulfate in the original aluminum sulfate solution? For a question like this how do I find

    asked by CL on February 23, 2017
  85. UIC

    Given a diprotic acid, H2A, with two ionization constants of Ka1 = 3.57× 10–4 and Ka2 = 3.14× 10–12, calculate the pH and molar concentrations of H2A, HA–, and A2– for each of the solutions below. (a) a 0.182 M solution of H2A (b) a 0.182 M

    asked by Anonymous on October 18, 2015
  86. Physics

    The method by which the Mars exploration rovers, Spirit and Opportunity, landed on the surface of Mars in January of 2004 was quite elaborate. The rovers began their descent through the thin Martian atmosphere on a parachute until they reached an altitude

    asked by Frances on September 7, 2007
  87. chemistry

    consider a crystallization of sulfanilamide in which 10 mL of hot 95% ethyl alcohol is added to 0.10 g of impure sulfanimide. after the solid has dissolved, the solution is cooled to room temp. and then placed into an ice-water bath. no crystals for, even

    asked by BOB on October 7, 2008
  88. Foreign languages

    Can you please check these sentences, Writeacher? 1) We...... (sit) in the sun for ... when she (tell) us to get inside. 2)We had been sitting in the sun for about half an hour when she told us to get inside. 3) Peter confessed to eating all the cake.

    asked by John on July 2, 2012
  89. Physics

    When one gallon of gasoline is burned in a car engine, 1.20 108 J of internal energy is released. Suppose that 0.99 108 J of this energy flows directly into the surroundings (engine block and exhaust system) in the form of heat. If 5.0 105 J of work is

    asked by please help on January 13, 2013
  90. Chemistry

    Powdered AgOH is slowly added to 2.0 L of a 0.020 M solution of NaOH until no more AgOH will dissolve. If Ksp = 1.4 x 10 -8 for AgOH: a. What is [Ag +] in the saturated solution? b. What mass of AgOH had to be added to the solution to produce this

    asked by joseph lungu on April 19, 2018
  91. Chemistry

    A saturated solution of Mg(OH)2 is prepared having a large excess of Mg(OH)2. Sn(NO3)2 is added to the solution. Ksp = 1.8 10-11 for Mg(OH)2 and Ksp = 5.1 10-26 for Sn(OH)2. (a) What [Sn2+] is required to start the precipitation of Sn(OH)2? (b) What [Sn2+]

    asked by Gregory on March 14, 2013
  92. Chemistry

    Consider the titration of 50 mL of 0.250 M HCl with 0.1250 M NaOH. Calculate the pH of the resulting solution after the following volumes of Na OH have been added. a) 0.00 mL b) 50.00 mL c) 99.90 mL d) 100.00 mL e) 100.1 mL The question is, I get, for

    asked by George on April 27, 2013
  93. chemistry

    A solution of iron(III) thiocyanate was produced by dissolving 7.98 milligrams solid iron(III) thiocyanate in enough water to produce a 100.00 mL solution. What is the concentration, in molarity, of the solution?

    asked by Anonymous on November 6, 2013
  94. chemistry

    ihave two solutions. in the first solution , 1.0 moles of sodium chloride is disslved to make 1.0 liters of solution . in the second one, 1.0 moles of sodium chlorine is added to 1.0 liters of water.is the molarity of each solution the same?

    asked by wendy on February 13, 2012
  95. physics

    In another solar system, a 100,000 kg spaceship and a 200,000 kg spaceship are connected by a motionless 90 m long tunnel. The rockets start their engines at the same time, and each produces 50,000 N of thrust in opposing directions. What is the system's

    asked by Anonymous on December 11, 2012
  96. biology a

    Read the scenario. A cell contains 90% water and 10% salt. The external solution contains 75% water and 25% salt. Which statement is correct? A>> The external solution is hypotonic, so the cell will shrink B>> The external solution is hupotonic, so the

    asked by Rylee on February 12, 2018
  97. Math

    At the first tri-city meeting, there are 8 people from town A, 7 people from town B, and 5 people from town C. If a council consisting of 5 people is randomly selected, find the probability that 3 are from town A and 2 are from town B. How would I show my

    asked by Punkie on December 6, 2009
  98. SS

    What is the difference in the mission system used by the spanish and the empresario system? A. The Spanish sent out missionaries sponsored by the state and the empresario system had empresarios that settled on their own land. ** B. Both the Spanish and

    asked by Check my answer on October 17, 2017
  99. Chemistry

    A 2.80-g sample of haematite ore containing Fe3+ ions was dissolved in a concentrated acid and the solution was diluted to 250 mL. A 25.0 mL aliquot was reduced with Sn2+ to form a solution of Fe2+ ions. This solution of Fe2+ ions required26.4mL of a

    asked by Luke on August 23, 2016
  100. Computer Science

    0 down vote favorite I have to print: Ain't no sunshine when she's gone It's not warm when she's away. Ain't no sunshine when she's gone And she's always gone too long Anytime she goes away. How would I used methods to print these no loops? Would it be

    asked by Jake on September 26, 2015

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