1. Science

    How many kilos of ammonia (N1H2)are contained in 600L of a solution that is8% NC13 by volume

    asked by Carrisse on July 16, 2013
  2. Math - derivatives of cos and sin fucntions

    a) Find an equation of a line that is tangent to y=2sinx and whose slope is a maximum value. b) Is there more than one solution? Explain.

    asked by Farah on November 6, 2010
  3. Chemistry

    What is the pH of a 0.40 mol L^-1 H2Se solution that has the stepwise dissociation constants Ka1 = 1.3 × 10^-4 and Ka2 = 1.0 x 10^-11 ? Thanks in advance

    asked by Elaina on June 21, 2015
  4. analytical chemistry

    What weight of potassium acid phthalate(KHC8H4O4) is required to react with 25 ml OF 0.5N NaOH solution

    asked by jeslf on April 28, 2015
  5. Calculus

    Find the unique solution to the differential equation y"?1y'?6y=?24(t^2)+10t+41 satisfying the initial conditions y(0)=?6 and y'(0)=?26

    asked by Hannah on December 3, 2010
  6. Chemistry

    To make the following saline solution(375ml 0.5%w/v sodium chloride) what would you weight out? what volume of water would you use?

    asked by Danny on October 22, 2010
  7. chemistry

    when zinc graurles are dipped in copper sulphate solution write balance equation?

    asked by swati on May 10, 2016
  8. 10th grade algebra

    How many kg of pure salt must be added to 8 kg of a 30% solution to obtain a 35% soltution? Round to the nearest tenth.

    asked by natalie on November 12, 2009
  9. Calculus

    (1 pt) Find the unique solution to the differential equation y"?5y'+6y=?312sin(2t) satisfying the initial conditions y(0)=?31 and y'(0)=?18

    asked by Hannah on December 3, 2010
  10. chemistry

    When the following reaction is balanced in acid solution, the coefficient of H+(aq) will be: Cr2O72-(aq) + Sn2+(aq) --> Cr3+(aq) + Sn4+(aq)

    asked by Becca on March 22, 2012
  11. Chemistry

    if a flask of 750 ml of 0.80m of nacl solution was left, and 275 ml evaporated, what is the new concentration

    asked by vikki on June 2, 2017
  12. Math

    solve using the multiplication principle. don't forget to perform a check. 12x=-96 the solution is x=

    asked by Tom on September 27, 2009
  13. Chemistry

    Determine the amount of potassium chloride in each of the following solutions: 44mg of a solution containing 15% KCl by mass.

    asked by Kelsey G on November 30, 2010
  14. Chemistry

    Determine the amount of potassium chloride in each of the following solutions: 22.2kg of a solution containing 17.2% KCl by mass.

    asked by Kelsey G on November 30, 2010
  15. Algebra

    Solve the following systems of equations using the addition (elimination) method. What type of system is it? Name the solution if there is one. 13. x+y=6 x-y=4

    asked by Steveo on March 2, 2014
  16. Chemistry

    Determine the hydronium ion concentration in a solution that is 0.00042M HCL Answer in units of M.

    asked by Raven on May 8, 2017
  17. algebra

    Find the missing coordinate to complete the​ ordered-pair solution to the given linear equation. y=5x+4

    asked by linda on September 28, 2017
  18. College Algebra

    Show all work solve the Polynomial inequality and express the solution in set notation. (3p-2p^2)/(4-p^2)

    asked by Liz on October 18, 2011
  19. Chemistry

    Need help with problem (Molarity) How many grams of NaOH are required to prepare 500.0mL of a 2.00 M solution?

    asked by JOY on March 19, 2013
  20. physical sciences(chemistry)

    Explain why solution turns blue by referring to the relative strength of oxidising agent?

    asked by Xalati on July 6, 2015
  21. chemistry

    what mass of potassium chloride is required to prepare 5.00L of a 2.00M solution of KCL

    asked by TROUBLED on October 24, 2011
  22. University of Liberia Chemistry 102

    Using a current of 4.75A how many minutes does it takes to plate onto a sculpture 1.50g of CuSO4 solution?

    asked by James on June 29, 2016
  23. Chemistry

    What's the resulting solution if 2000cm3 of 1MH2S04 is mixed with 20cm3 of 1M NaOH? i got 0.5M,acidic in concentration.

    asked by Jonathan on March 10, 2017
  24. maths

    find the general solution of the following first order differential equation. u(t): du/dt = u /t+2t pls show all working

    asked by Zane on October 26, 2011
  25. Chemistry

    What mass of NaCl is needed to precipitate all the silver ions from 20.0 mL of 0.100 M AgNO3 solution?

    asked by Joe on October 13, 2011
  26. math

    Can someone please explain this problem Find the general solution to the linear system of differential equations. x'1 x'2 x'3 = −4 −4 5 0 −4 4 0 4 2 x1 x2 x3

    asked by Anonymous on April 25, 2015
  27. Chemistry 104

    Nitric acid, HNO3, is available commercially at a concentration of 16 M. What volume would you use to prepare 770 mL of a 0.19 M solution?

    asked by Brenna on November 11, 2010
  28. Math

    What the base b1 of an Isosceles trapezoid if b2=57ft,h=17ft6inches and both legs are 23ft? or the formula for the solution?thank you.

    asked by Jason on November 18, 2011
  29. Chemistry

    What volume of a 0.578 M potassium hydroxide solution is needed to exactly neutralize 3.26 grams of KHP ?

    asked by Anonymous on October 21, 2011
  30. chemistry

    if you have 100 ml each of 1.0 m solutions of NaCl,KCl, and CaCl2 which solution would have the largest mass? explain..

    asked by lilly on April 28, 2011
  31. Physics

    what is the mass of hydrogen peroixide, H2O2, in 350 grams ofa 20% by weight solution?

    asked by Doly V on December 4, 2009
  32. chemistry

    If 2.1 moles of CaCl2 are dissolved in enough water to make a 0.92-liter solution, what is the resulting molarity?

    asked by smith on November 28, 2010
  33. math

    which ordered pair is a solution to the equation y = 3x + 4. I just can't figure it out. I have been working on this problem for over an hour. Please help me with the steps

    asked by Jay on April 11, 2015
  34. science

    what can happen to unhomogenized milk if left to stand is this an example of a mechanical mexture, solution or suspension?

    asked by jenna on June 21, 2006
  35. mathematics

    find the general solution of the following first order differential equation. u(t): du/dt =(u/(t+2t)) pls show all working

    asked by Zane on October 26, 2011
  36. Math

    For the following equations, write a word problem draw a picture, and find the solution to the equation: 5/12 - 1/3= 1/2 - 2/3=

    asked by Anonymous on October 9, 2009
  37. Chemistry

    What volume of a 0.578 M potassium hydroxide solution is needed to exactly neutralize 3.26 grams of KHP ?

    asked by Anonymous on October 21, 2011
  38. Chemistry

    What volume of a 0.578 M potassium hydroxide solution is needed to exactly neutralize 3.26 grams of KHP ?

    asked by Anonymous on October 21, 2011
  39. Chemistry

    I have 500 mL of a 6.0 M solution that I want diluted down to 2 M. How many mL of water should I add to the solutiion. " FOR EVERY PROBLEM YOU MUST DRAW A PICUTRE"

    asked by Emma on February 20, 2014
  40. Chemistry

    How much ethylalcohol must be added to 1litre of water so that the solution will freeze at 14 farenite, kf of wa ter is 1.86 c/mol

    asked by Ria on February 22, 2017
  41. chemistry

    Name the product obtained on passing carbon iv oxide into saturated sodium trioxocarbonate (iv) solution

    asked by Tobasco on May 21, 2016
  42. math

    write an inequality that represnts this sentence, graph the solution. A hamster weighs less than 10 ounces. thanks

    asked by dillon on October 23, 2007
  43. precalculus

    solve the inequality algebraically. write the solution in interval notation. the absolute value of x-2/3 is less than or equal to 4

    asked by jase on November 25, 2011
  44. science

    a solution that is composed of 5g of salt for every 95g of water produces by what percent concentration of mass?

    asked by frances on September 26, 2012
  45. Chemistry

    find the concentration of h3o in a .86mol/l solution of the weak acid H2O2 (kA=2.4x10-12)

    asked by Buck on May 31, 2016
  46. chemistry

    How much water is neede to add to 60ml of 10% NaCl, density 1.05g/ml to obtain 4% solution

    asked by Anonymous on June 29, 2013
  47. chemistry

    What volume of a 0.553 M calcium hydroxide solution is needed to exactly neutralize 7.34 grams of KHP

    asked by Pam on April 9, 2015
  48. Algebra 2

    The only solution of the equation ... x&2+bx-18 over (divided by) -2x+4 equals 4.... When x=-17. I plugged in the number and replaced x with -17 and it looks like this... (-17)^2 +(-17x)-18 over 38. I just got lost.

    asked by Macin on June 2, 2015
  49. general chemistry 2

    How many grams of urea [CO(NH2)2] would be required to prepare 200 mL of a 5.0 x 10-3 molar solution? Answer

    asked by Anonymous on September 26, 2012
  50. C

    number of moles of NaOH required to titrate 38.05mL of a 1.500 M H3PO4 solution

    asked by Nick on October 11, 2011
  51. Chemistry

    Which of the following will be more soluble in an acidic solution than in pure water? Be(OH)2 Ag2SO4 RbClO4 CuCN Cul

    asked by Anon on March 14, 2013
  52. Science

    What kind of a solution will you create if you add 17g of table salt to 50g of wAter at o'c?

    asked by John mark Lomboy on June 25, 2016
  53. Chemistry

    Determine the concentration for the following solutions 2.0g KOH is dissolved in water to make 200.0 ml of solution

    asked by Sara on February 23, 2017
  54. math

    Show you solution. List the terms that complete a possible pattern in each of the following: a)38,33,28,23,18,_,_,_ b)640,320,160,80,_,_,_ c)7,8,15,23,38,_,_,_

    asked by Anonymous on September 24, 2010
  55. Chemistry

    Express the concentration of a commercial hydrogen peroxide solution, which is 3.0 (w/w), as a molarity. Show all work

    asked by Amber on March 13, 2014
  56. Chemistry (again)

    What mass of NaOH is required to precipitate all the Fe2+ ions from 52.0 mL of 0.200 M Fe(NO3)2 solution?

    asked by Alex on September 28, 2010
  57. Chemistry

    The Ksp of aluminum hydroxide is 5 x 10 -33.At what ph foes Al(OH)3 just begin to precipitate in a 0.15M solution of AlCl3?

    asked by Beth on October 7, 2010
  58. Chemistry

    At home, you dissolve 26.0 g of AlCl3 in 1.5 kg of water. What is the freezing point of this solution? (Normal f.p = 0.0 C, Kf= 1.86 C kg/mol)

    asked by Nick on May 4, 2015
  59. chemistry

    How many kilograms of water must be added to 75.5 grams of Calcium nitrate to form a 0.500 m solution?

    asked by lynda smith on November 18, 2009
  60. Analytical Chemistry

    Determine the pH of a solution that is generated when 2.623 g Na3PO4 is added to a 100mL of 0.0800 M H3PO4.

    asked by Kevin on July 24, 2013
  61. chemistry

    how many grams of Na2CO3 must be dissolved into 155 g of water to create a solution with the molality of 8.20 mol/kg?

    asked by william on December 6, 2010
  62. science

    which solution is made entirely of gases? cough syrup,soda,helium,or clean air.

    asked by tricia on September 29, 2011
  63. algebra

    use method of substitution to solve the system of linear equations. 2x-y=3 9x-4y=14 is the solution an ordered pair(,)

    asked by scott on March 30, 2012
  64. graphing linear equatios

    I am really confused...can someone help me with this? I am supposed to graph solution of given system of linear inequality: y is greater than 4x-3 y is less than or equal to x+2

    asked by Lynne on November 20, 2010
  65. Math

    Find the following indefinite integral ∫ (x^2 -8)/ (x^2 -16) dx My work ∫ (x^2 - 8) * ∫ (1/(x^2 - 16) ∫ (x^2 - 8) = [(x^3)/(3) - 8x)] + C ∫ (1/(x^2 - 16) = ∫ [(-1/8)/(x+4)] + [(1/8)/(x-4)] = (-1/8)*ln|(x+4)| +(1/8)*|(x-4)| + C So I get this,

    asked by Georges on April 21, 2019
  66. Metis of the Red River

    About the Conflict that occurred between the Selkirk settlers and the Metis, could there have been any way to prevent it? Like could a peaceful solution have been found?

    asked by Anonymous on April 28, 2011
  67. Algebra

    Find the missing coordinate to complate the ordered-pair solution to the given linear equation. 9y+7x=-63 (a) (-9,0) (b) (? ,7)

    asked by 1234 on March 6, 2013
  68. Chemistry

    30.0 mL 0.200 M lithium hydroxide is added to 50 mL of 0.1 M nitrous acid. What is the final pH of the resulting solution?

    asked by YT on May 17, 2017
  69. analytical chemistry

    What is the pH of a solution formed by mixing 14.35 mL of 0.200 F HCl with 0.322 g of Na3PO4, followed by dilution to 500.00 mL?

    asked by Jonny on December 4, 2007
  70. physics

    damon,reiny,steve,ms sue.plz get a solution 2 my question please itz urgent!!!

    asked by edward on August 8, 2015
  71. chemistry

    How many grams of sucrose would you dissolve in water for a total volume of 500mL to make a 5% solution?

    asked by jami on January 20, 2010
  72. algebra

    I just started learning functions and how to graph them.. but I don't know how to do this problem? x + y = 0. I wasn't sure so I put "No Solution"

    asked by Michelle on December 2, 2010
  73. chemistry

    If tums is added to 20.0 mL of 0.400 M HCl solution, how many grams of CO2 gas are produced?

    asked by Starlit on April 22, 2011
  74. Chemistry

    The mass of lead bromide that is dissolved in 250 mL of a saturated solution is____ grams.

    asked by Kat on May 27, 2016
  75. Chemistry

    Balance the net ionic equation I− + NO− 2 ! NO + I2 (in acidic solution). What is the sum of the coefficients? Use H+ rather than H3O+ where appropriate. 1. 13 2. 15 3. 17 4. 11 5. 19

    asked by Jeremy on October 20, 2010
  76. Maths, physics, chemistry,

    The weight of H2C2O4.2H2O required to prepare 500 ml of 0.2N solution is a)126g b)12.6g c)63g d)6.3g

    asked by Deepak on April 29, 2017
  77. Chemistry

    how many moles of solid mg(oh)2 should you ad to 200 ml of .15M acetic acid solution to produce ph 4.0 buffer?

    asked by Munavvar on February 28, 2015
  78. computer science

    What type of solution is formed when steam from boiling water evaporates into the air?Explain.

    asked by Amar Saleh on October 12, 2010
  79. CHEMISTRY

    GIVEN A 30G OF ALCL3 DISSOLVED IN 250G OF WATER TO CME UP WITH 400ML SOLUTION WHAT IS THE NORMALITY ?

    asked by Savannah on July 31, 2017
  80. Chemistry

    What are the concentrations of acetic acid (pKa = 4.76) and acetate in a buffer solution of 0.15 M at pH 4.5? Please help me do this problem. I have no idea how to do it.

    asked by Emma on April 27, 2016
  81. Chemistry

    How much Pb(OH)2(in mg) can be added to 4.0liter of a 0.095 M KOH solution before precipitation starts? Ksp 4.2x10^-5

    asked by Joy on April 1, 2013
  82. chemistry

    What volume of water should be added to 50 ml of HNO3 having specific gravity 1.5g ml-1 and 63.0%by weight to have one molar solution

    asked by adarsh on June 13, 2015
  83. Chemistry

    What will the pH of a solution be when 0.5447 L of NaOH (pH = 14.436) is added to 0.357 L of 2.01 M ascorbic acid (H2C6H6O6)? Not sure how to do this.

    asked by Anonymous on June 29, 2016
  84. chemistry

    When a good indicator has been chosen, the pH at which the solution changes color is very close to the__________ point of the titration

    asked by Mia on April 4, 2008
  85. Chemistry

    Name the product obtained on passing cabon(2) oxide into saturated potassium trioxocarbonate(4) solution.

    asked by Yaseerah on May 20, 2015
  86. chemistry

    What is the molality of a solution made by adding 0.130 g of zinc sulfite to 151 ml water?

    asked by Dorothy on March 1, 2014
  87. AP chemistry

    1). In a titration 20 mL of 0.100 M of HCl is added to 50.0 mL of 0.150 M of ammonia. A). What is the pH of NH3? B). What is the pH of the resulting solution? HELP :(

    asked by Amanda on March 21, 2013
  88. math

    If 4 7 47 of 35 35 is divided by 2 9 29 of 21 21 , what is the quotient? Write the solution as a mixed number or a fraction in lowest terms.

    asked by Anonymous on September 23, 2017
  89. chemistry

    40 mL of 0.150 M ammonium hydroxide is added to 20 mL of 0.3 M perchloric acid. What is the final pH of the resulting solution?

    asked by Anonymous on May 17, 2017
  90. chemistry

    30.0 mL 0.200 M lithium hydroxide is added to 50 mL of 0.1 M nitrous acid. What is the final pH of the resulting solution?

    asked by YT on May 17, 2017
  91. chemistry

    What mass of NaOH is required to precipitate all the Fe2+ ions from 50.0 mL of 0.200 M Fe(NO3)2 solution?

    asked by jennifer on January 11, 2010
  92. math

    If the solution to the linear programming problem exists, then it has to be at a corner point.it is true or false?

    asked by sateko on April 18, 2011
  93. it

    Can someone please help me with this. I need some understanding on how to 4] Use IPO for analysis [4] Use Pseudo Code to show your design solution. I am not sure how to do this or how or what to do. Please help me better understand this. Please

    asked by Anonymous on May 16, 2008
  94. Chemistry

    which salt solution would have the highest ph and why KI,KBr,KF,KCL or they all have the same ph. Im leaning towards KF since im pretty sure the other salts are neutral?

    asked by Sean on February 19, 2017
  95. i hate.."chemistry"

    write the balanced half reaction for the conversion of HOBr(aq) to Br2(aq) in acidic solution

    asked by amethyst on May 11, 2008
  96. Chemistry

    What is the OH^- concentraton of a solution that is 0.10M in Na2C2O4? I have a couple of these concentration questions asking different things but I don't know how to do them

    asked by LT on April 14, 2008
  97. Math

    After deducting10% from sum and then 20% from the remainder₹3600 are left.Find original amount.Solution

    asked by Prateek on June 8, 2017
  98. algebra

    Find the radius and the center of the circular section of the sphere |r| = 17 cut off by the plane r·(i+2j+2k) = 24. Solution

    asked by shamma on October 4, 2017
  99. Chemistry

    a solution of 25 ml of HCL is neutralized by 42.5 ml of 0.10 M concentration of NaOH.Need to write a balanced equation for the reaction

    asked by Noah on March 10, 2015
  100. chemistry

    the molarity of a solution composed of 25.4g KHCO3 diluted with water to a total volume of 200 mL

    asked by Colin on October 18, 2011

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