1. Chemistry DrBob

    You told me the steps on a previous post but i must have forgot how to work out absorbance or ICE cus i keep getting the wrong answer ... The standard solution of FeSCN2+ (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN) has an

    asked by Amy on April 10, 2008
  2. Chemistry

    I have worked this problem out a number of ways, but every answer I come up with is incorrect. I have posted my last answers underneath the question. Please advise. (a) What is the mass percentage of iodine (I2) in a solution containing 0.060 mol I2 in 105

    asked by Jim on September 13, 2007
  3. chemistry (confirmation)

    If the reverse reaction is favoured and it includes a solid as a reactant, the solid concentration is not going to increase as solids and liquids stay constant right? To determine which solution is most basics given [OH-] / [H30+], you take the -log and

    asked by Xi on July 20, 2008
  4. English, psychology

    What are the cultural norms for the following: Individual rights vs the rights of society - There are more right for individual and rights of society. People can say whatever they want, even if it means to insult someone. People have rights to pursue their

    asked by miyabi on December 18, 2015
  5. English

    Thankk you very much. I still have some more sentences for you to check. 1) What part will Mickey and his friends play in a sci-fi film? They will be extras. 2) Will they get paid? Will they have to take a day off school? 3) What is Mickey going to do? Why

    asked by Henry2 on August 23, 2011
  6. socials

    Sue this mohammad’s sister, his computer not working. He need help with his work today. Imagine urself as the prime minister or minister of finance, what would you do about the debt the Canadian government carrying. Need thesis statement, evidence, and

    asked by Shreya on December 12, 2011
  7. Math

    Can someone help me with these questions? Q: The sum of 7 and u is 14 Q: Jamal and Keisha went running. Jeusha ran 2.4 miles more than Jamal. If Keisha ran 8.5 miles, how many miles did Jamal run? Q: Phil solved the question x + 235.12 = 310.21, and found

    asked by anonymouspants on November 9, 2015
  8. MATH

    Draw the graph of the equation 4x²-6x+3 using the -2≤x≤3 use a scale of 2cm to 1unit on the x-axis, 1cm to 4units in the y-axis. Find the graphfind; (a) minimum value of y (b) The roots of the equation 4x²-6x-3=0 (c) The value of x when y=5 (d) The

    asked by AGBOR on March 1, 2018
  9. chemistry

    Molarity is defined as moles/volumesolution What is the molarity of a solution of silver perchlorate, AgClO 4 , if 3.2 moles of silver perchlorate is dissolved in 1.5 liters of water? Is it 2.133 M, 4.756 M, 4.8 M, or 4.810 M ? it is 4.756

    asked by bobpursley on December 7, 2006
  10. Chemistry

    A solution of a weak acid will consist of the acid and its conjugate base. True or False false Yes, of course: Take acetic acid acetic acid + H2OH3O+ + acetateion- The system is in equilibrium. true

    asked by KHNJ on February 14, 2007
  11. math

    There are 5 rock songs, 6 country songs, and 3 hip-hop songs. How many different albums can be formed using the songs if the album should contain at least 1 rock song and 1 country song? My solution: 14C5x14C6x14C3-5C1x6C1 Is this correct? Thanks in

    asked by Anonymous on October 14, 2016
  12. Chemistry

    Enough concentrated sulfuric acid solution was added to provide 3.00 grams of sulfuric acid which dissolved 4.00 grams of pure fluorapatite. How much excess sulfuric acid was used? Or, in other words how much sulfuric acid was left after it reacted.

    asked by Lupe Gomez on November 2, 2018
  13. Chemistry.

    What volume of ethylene glycol (C2H6O2), a nonelectrolyte, must be added to 13.7 L of water to produce an antifreeze solution with a freezing point of -30.0¡ÆC? (The density of ethylene glycol is 1.11 g/cm3, and the density of water is 1.00 g/cm3.)

    asked by ? on November 23, 2009
  14. Chemistry

    What volume of ethylene glycol (C2H6O2), a nonelectrolyte, must be added to 13.7 L of water to produce an antifreeze solution with a freezing point of -30.0¡ÆC? (The density of ethylene glycol is 1.11 g/cm3, and the density of water is 1.00 g/cm3.)

    asked by fdqed on November 23, 2009
  15. Chemistry

    If a solute is very soluble in a solvent (ethanol), why doesn't crystallization occur? I attempted to recrystallize 14 g of solute A in 30 mL of ethanol, but crystallization didn't occur. Why? Is it because a) the solution is supersaturated or b) because

    asked by hellp on October 16, 2012
  16. math

    tom takes 3days to do a piece of work while jerry takes only one day for the same. together, they both can finish the job in 15 days. in how many days tom will finish the work? #please give it, the complete solution. please hurry

    asked by lucky on December 16, 2015
  17. chemistry

    In the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water, the oxidizing agent is____ is it hydrogen peroxide? cus its not water right?

    asked by Amy on April 15, 2008
  18. Math -data management

    There are 5 rock songs, 6 country songs, and 3 hip-hop songs. How many different albums can be formed using the songs if the album should contain at least 1 rock song and 1 country song? My solution: 14C5x14C6x14C3-5C1x6C1 Is this correct? Thanks in

    asked by Mark on October 13, 2016
  19. chemistry

    Estimate the initial [C6H5CO2H] in an aqueous solution in which the [C6H5CO2-] is 0.000172 M at equilibrium (make an approximate calculation assuming that initial concentration is equal to the equilibrium concentration). C6H5CO2H = C6H5CO2- + H+

    asked by HELP ASAP PLEASE on October 10, 2013
  20. maths

    really urgent plsss help... the digit at the ten's place of a two digit number is four times that in the unit's place. if the digits are reversed, the new number will be 54 less than the original number. find the original number. check your solution.

    asked by shagun on October 23, 2015
  21. Chemistry

    Determine the pH (to two decimal places) of a solution prepared by adding 15.9 mL of 0.0551 M sodium hydrogen oxalate (NaHOOCCOO) to 0.488 g of sodium oxalate (Na2OOCCOO). Hydrogen Oxalate pKb of 12.77 Oxalate pKb of 9.81

    asked by Reven on December 6, 2011
  22. physical cemistry

    f 20.0mL of 0.122M NaOH are required to reach the first equivalent point of a solution of citric acid(tripotic acid H3C6H5O7).How many mL of NaOH in total are required to reach the second equivalence point?

    asked by KAago on March 30, 2017
  23. Physical Chemistry

    If 20.0mL of 0.122M NaOH are required to reach the first equivalent point of a solution of citric acid(tripotic acid H3C6H5O7).How many mL of NaOH in total are required to reach the second equivalence point?

    asked by Malebogo on February 10, 2014
  24. Math

    Jim runs 50% faster then Bob. In a 1200m race how much of a head start should Bob get to make the race fair?  My solution: 50%= half Half of 1200m is 600m So the answer is 600m Am I right

    asked by Anonymous on November 5, 2015
  25. science

    how do you rearrange 1.1513/sqrt(f)=ln(Re*sqrt(f)/2.51) to get it in terms of f and also rearrange it in terms of Re? if you identify an initial estimate of the solution for f when Re=5000 how do you plot on a scatter graph (using something like 0 to 0.1

    asked by sarah on November 12, 2008
  26. Medical billing and coding

    Could someone look over this for me it is a paper in APA to answer 4 questions? Thanks. HEALTH INSURANCE PORTABILITY AND ACCOUNTABILITY ACT HIPAA 1. Health Insurance Portability and Accountability (HIPAA) is an act that was signed by Congress in 1996 to

    asked by Theresa on November 3, 2010
  27. Silent Night in Cheyenne

    For anyone interested in Native American, here is what is sung to the tune of Silent Night. Pavetaa'eva nehe'xoveva Tsexho'ehnese ho'eva, Jesus Vo'estanevestomanehe. Ehvo'estanetsehestaotsehoo'o Tsexho'eotsestomotahaetse Vo'estanevehahtsestotse. Ahaa

    asked by SraJMcGin on December 18, 2006
  28. Check 1 question.

    Help please!i'm not sure if i'm right. Honestly i'm not that confident about most of my work. In which of the following thermochemical equations would the deltaH be considered a heat of solution? C6H6 (s)--> C6H6 (l), deltaH = +9.87 kJ 2C8H18(l) + 25O2

    asked by Anonymous on June 22, 2012
  29. Chemistry: Please check answers

    12. What balances charges that may build up as reduction and oxidation occur in a voltaic cell? *the salt bridge one of the half-cells the electrolyte solutions the moving electrons 13. What is the electrode in the center of the most common dry cell made

    asked by Cassie on April 9, 2013
  30. Calculus

    Okay so I have a question on my assignment that says: You are given that tan(y) = x. Find sin(y)^2. Express your answer in terms of x. I know its derivatives, and I've tried taking the derivatives of both etc, and got them both to come out as cos(y)^2,

    asked by Tracy on October 21, 2006
  31. local nature trail

    Hi i ahve to create a local naturetrail on my area.It has to incorportae science, geography and histiry features.I ahve made out the questions and pictures but I am not very good with microsoft word and need someone to help put it together.Any ideas??

    asked by sara on March 24, 2007
  32. physics math

    the acceleration of a car is 2m/s^2 and another car has constant velocity of 35m/s.what time the first car overtake the car with constant velocity of the first car? draw and show solution

    asked by Hshdhdhdhdjdjdjdjjsjshsgshshs on December 10, 2012
  33. chemistry

    What is the freezing point of each solution? a)1.40mol Na2SO4 in 1750 g H2O Are these the right steps? 1.40mol Na2SO4 / 1.75kg = .8m 3 * 1.86 degrees C * .8m = 4.46 degrees C 4.46 degrees C - 1.86 degrees C = 2.6 degrees C

    asked by Jack on April 29, 2010
  34. math

    Determine the number of solutions for the following system of equations 2x+5y=7 10y=-4x+14 1)Exactly one solution 2)No solutions 3)infinite solutions 4)Exactly 2 solutions I solved the equations and got y=7-2X/5 y=-4X+14/10 and I said infinite solutions.

    asked by B8 on March 2, 2014
  35. Science

    1.The Bohr model of the hydrogen atom is best described as: 1. A large lump of chocolate chip cookie dough with electrons as the chocolate chips; those of higher energy are on the outside surface of the lump 2. Similar to Saturn with electrons of varying

    asked by Sarah on February 13, 2015
  36. microeconomics

    Question 4. (50 points) In an auction in the market for wholesale electricity, producers of electricity submit bids for each generator that they operate. The bid is the minimum price the operator of the generator is willing to accept for before it will

    asked by joel on September 22, 2006
  37. Math

    In an interbarangay basketball league the team from barangay Culiat has won 12 out of 25 games a winning percentage of 48% .We have seen that they need to win 8 games consecutively to raise their percentage to at least 60%. What will be their winning

    asked by Queen on July 18, 2016
  38. math

    The illumination a surface receives from a light source varies inversely with the square of the distance. A table lamp is 3ft from a certain work area. How far is another work area if it receives only 1/3 as much illumination as the first work area? (W/

    asked by HELP HELP HELP MNHS on January 11, 2013
  39. math

    In an interbarangay basketball league the team from barangay Culiat has won 12 out of 25 games a winning percentage of 48% .We have seen that they need to win 8 games consecutively to raise their percentage to at least 60%. What will be their winning

    asked by Queen on July 18, 2016
  40. Chem 2

    calculate the vapor pressure of a solution made by dissolving 61.7g (molar mass= 60.06g/mol) of Urea in 212ml of water at 35C. what is the vapor pressure lowering? the vapor pressure of water at 35c =31.82 mmHg

    asked by PleaseHelp on October 9, 2014
  41. chemistry

    Strychnine, C21H22N2O2(aq) is a weak base but a powerful poison. Calculate the pH of a 0.001 mol/L solution of strychnine. The Kb of strychnine is 1.0 x 10^-6 My work: I called Strychnine SN SN + HOH --> SNH+ + OH- Kb = (SNH+)(OH-)/(SN) (SNH+) = x (OH-) =x

    asked by Ross on April 7, 2008
  42. chemistry

    The distribution coefficient of a compound between ether and water is 5.8. A student takes 1.5.g of the compound and dissolves it in 45 mL of water. The resulting solution is placed in a separatory funnel and an extraction is performed using 15 mL of

    asked by Anonymous on October 7, 2011
  43. chemistry

    The distribution coefficient of a compound between ether and water is 5.8. A student takes 1.5.g of the compound and dissolves it in 45 mL of water. The resulting solution is placed in a separatory funnel and an extraction is performed using 15 mL of

    asked by Anonymous on October 7, 2011
  44. Chemistry

    Vapour pressure of ideal solutions at 25c the vapour pressure of chloroform and carbon tetrachloride are 26.54 and 15.27 kpa respectively. If the liquids from ideal solutions. (A) what is the composition of the vapour in equilibrium with with a solution

    asked by Munavvar on February 28, 2015
  45. chemistry

    Strychnine, C21H22N2O2(aq) is a weak base but a powerful poison. Calculate the pH of a 0.001 mol/L solution of strychnine. The Kb of strychnine is 1.0 x 10^-6 My work: I called Strychnine SN SN + HOH --> SNH+ + OH- Kb = (SNH+)(OH-)/(SN) (SNH+) = x (OH-) =x

    asked by Ross on April 7, 2008
  46. Chemistry

    When 0.354 g of an unknown nonelectrolyte compound was dissolved in 12.5 g of benzene a solution was formed that froze at 4.46 degrees C. Calculate the molar mass of the unknown compound. The freezing point of benzene if 5.48 degrees C, and the Kf of

    asked by Shines on October 15, 2013
  47. Chemistry

    Buffers- Common Ion effect IS this Correct Calculate the pH of a aqueous solution containing 0.15 M HNO2 and 0.20 M NaNO2 (aq). The Ka of nitrous acid is 4.0*10^-4. HNO2 + H20 NaNO2- + H30^+ Inital 0.15 0.20 X Final 0.15 0.20 Ka= [H30+][NaNO2]/ [HNO2]

    asked by Saira on August 11, 2009
  48. ashworth college

    In completing the work sheet, what is the reason for adding the net income for the year to the balance sheet credit column total It helps to put a subject in the subject box. In completing the work sheet, what is the reason for adding the net income for

    asked by cook on February 27, 2007
  49. english

    Hello I am having quite a bit of trouble trying to figure out a better way to answer this. 1. In the video, The Fates Present: Pyramus & Thisbe,There are parts of the animated version in which there is a character, who appears at the beginning of the

    asked by Sabrina on April 15, 2015
  50. Calculus

    A cylindrical drum is made to hold exactly 1m^3 in its interior. Assume that the material for the top and the bottom costs $20 per m^2, while that for the side costs $10 per m^2. Determine the radius of the drum that minimizes the cost of the material

    asked by Frederique on December 10, 2006
  51. Literature

    'Imagine that you are an extremely intelligent alien from outer space, but you have never seen a human before. For the very first time, you watch a human get out of bed, brush their teeth, sing in a chorus, or play softball. Choose a few of these

    asked by mysterychicken on November 19, 2009
  52. Chemistry

    What is the pH of the solution created by combining 1.30 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? This is how I would go about solving the problem, but could you tell me where I went wrong? First I would find the number of mols of OH

    asked by Marie on May 4, 2008
  53. chemistry

    a solution formed by mixing 50ml of 10.0 M NaX with 50ml of 2.0x10^3M CuNO3.Assume that Cu(l) forms complexions with X asn follows Cu^+ + X^- = CuX K1=1x 10^2 CuX + X^- = CuX2^- K2=1 x10^4 CuX2^- + X^- =CuX3^2- K3= 1x10^3 with overall reaction Cu^+ +3X^- =

    asked by Tat on April 7, 2014
  54. Math

    y=arccos(sin(x)), find dy/dx and sketch it's graph(I guess I can do this on wolframalpha after I'm done solving the question). And by arcsin I mean inverse of the expression(written like cos^-1(sin(x)), but is not 1/cos(sinx) but the inverse of cos). I am

    asked by Beth on January 4, 2016
  55. Chemistry

    Consider the reaction in aqueous solution: 6 HCl + 2 KMnO4 + 5 H2O2 ---> 5 O2 + 2 MnCl2 + 2 KCl + 8 H2O 1.) Write the total ionic equation. 2.) Write the net ionic equation. 3.) For each species (molecule or ion) in the net ionic equation, assign oxidation

    asked by Amy on February 29, 2012
  56. chemistry

    Calculate the mass ( g ) of the solute ethanol and the mass ( kg ) of the solvent CHCl3 that should be combined to prepare 9900 g of a solution that is 14.5 m ethanol. extra given info from problem: molar mass (g/mol): C2H5OH 46.07 CHCl3 119.38 density

    asked by Diem on February 25, 2010
  57. Physics

    If a metal with a threhold frequency of 1.1 x 10^15 Hz is illuminated by light with a wavelength of 170 nm, then the maximum kinetic energy of the emitted photoelectron will be? this is my solution: h= 6.63 x 10^ -34 J.s c = 3 x 10^8 m/s Wavelength= 1.7 x

    asked by Marium on June 24, 2010
  58. chemistry

    Calculate the molarity and mole fraction of a 2.35 m solution of acetone (CH3COCH3) dissolved in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.) Assume that the final volume equals the sum of the volumes of acetone

    asked by bob on May 4, 2010
  59. algebra

    Megan factored the expression 12x^2+13x-14 as (3x+2)(4x-7). But when Jacob applied the foil principle and multiplied out(3x+2)(4x-7), he got 12x^2-13x-14; thus, Megan's solution does not appear to check. Why is that? Please help Megan to understand this

    asked by sheba on July 26, 2011
  60. biochem

    I mixed 4.50mL of 10.0mM NaOH with .50mL phenol red. I need to calculate the pH of this solution. I have more information in my lab but I am not sure what data I need to look for. As part of the experiment I calculated pKa of Phenol Red. Do I use that pKa

    asked by amy on September 20, 2011
  61. Chemistry

    A 100.00 ml of volume of 0.500 M HCl was mixed with 100.00 ml of 0.500 M KOH in a constant pressure calorimeter. The initial temperature of individual acid and base was 23.0 degree celsius. The final temperature after mixing was 25.5 degree celsius Given

    asked by Payton on March 8, 2016
  62. College Algebra

    Translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution. State your answer for both variables. An orchard operator must dilute 11 quarts of a 60% insecticide solution by adding

    asked by Ashley on January 28, 2010
  63. Chemistry

    In a discussion,a study argued that calcium ions when asded to toothpaste would enhance the performance of the toothpaste by further strengthening teeth. Therefore, he suggested the addition of calcium hydrogen carbonate, calculate the solubility of

    asked by Shariah on January 26, 2017
  64. Chemistry

    A vessel of 9.49 L in volume contains 3.37 L of pure water at 25¡ÆC. A partial pressure of 4.73 atm of CO2 is quickly injected into the space above the water. Calculate the partial pressure of carbon dioxide remaining once the solution has become

    asked by Sally on February 2, 2007
  65. Public finance

    Please help me understand the problem provided below and suggest a solution. I thank you for your time and cooperation. Consider a public goods problem in which each person has the same income M and preferences as given by Uj=ln(g1+...+gN)+3ln(Cj) Assume

    asked by Anna on September 25, 2007
  66. Algebra

    Decide whether you would use a permutation, a combination, or neither. Next, write the solution using permutation notation or combination notation, if possible, and, finally, answer the question. A club with 31 members is to select five officers

    asked by Mary Ann on May 22, 2014
  67. Chem

    . Oleum or fuming sulfuric acid available commercially in concentrations ranging from 20 to 99.9% sulfur trioxide. A. What is the percent by mass of sulfur trioxide (SO3) if oleum is expressed as 3H2SO4 . 5SO3? Show your solution. B. Discuss at least three

    asked by John on November 17, 2012
  68. Chemistry

    The chief compound in marble is CaCO3. However, marble is readily attacked by acids. a) Determine the molar solubility of marble (that is, [Ca2+] in a saturated solution). b) Determine the equilibrium constant for the overall reaction that occurs when

    asked by Ashley on November 17, 2016
  69. Math

    Hi Ihave the solution and all thE steps for this question.:.but I am still having a hard time understanding it :( could somebody please help me walk through all the steps to this question? 1) assume that an average television costs $425 now and that the

    asked by Dawn on May 30, 2011
  70. Chemistry

    A vessel of 9.49 L in volume contains 3.37 L of pure water at 25¡ÆC. A partial pressure of 4.73 atm of CO2 is quickly injected into the space above the water. Calculate the partial pressure of carbon dioxide remaining once the solution has become

    asked by Sally on February 2, 2007
  71. Analytical Chemistry

    A solution is prepared by dissolving 0.2222 (¡¾0.0002) g of KIO3 in 50.00 (¡¾0.05) mL. (i) Calculate the molar mass of KIO3 with its associated uncertainty to the correct number of significant figures. (ii) Find the molarity and its uncertainty with an

    asked by Matt on February 27, 2017
  72. Finance

    Solution needed . You need to have $50000 at the end of 10 years .To accumulate this sum, you have decided to save a certain amount at the end of each of the next 10 years and deposits it in the bank. the bank pays 8 percent interest compounded annually

    asked by Tamanna on August 19, 2016
  73. Math

    New Hampshire is giving payday lenders the gong as it rings in the new year. A law that takes effect today caps the interest rate on small loans at 36 percent a year, which the industry has said will put it out of business. 1.6. EXERCISES 15 Payday lenders

    asked by Jackie on December 8, 2016
  74. science

    Read the scenario and answer the following questions: a. How could the scenario have been prevented? b. How should the student respond in the scenario to minimize the harm? During an experiment, Carin carefully pours solution A from a test tube into a

    asked by HEEEELP on October 2, 2018
  75. Kansas history

    The Progressive Movement in Kansas 1. Which of the following was a goal of politicians during the Progressive Era? A. Allow indirect election of senators. B. Ensure safe working conditions. C. Provide more common drinking cups. 2. During the Progressive

    asked by Sky, The Coder on March 29, 2019
  76. Chemistry

    Which of the following can we predict from an equilibrium constant for a reaction? 1 The extent of a reaction 2 Whether the reaction is fast or slow 3 Whether a reaction is exothermic or endothermic a. 1 only b. 2 only c. 3 only d. 1 and 2 only e. 1 and 3

    asked by Iby on May 13, 2010
  77. Organic Chemistry

    A sample of carvone was found to be 39% optically pure in favor of the dextrorotatory enantiomer. The specific rotation for enantiomerically pure carvone is 61o. The polarimetry experiment that led to this result was performed utilizing a 2.5 dm

    asked by polly on November 11, 2015
  78. Chemistry

    I dissolved 4g of solid NaOH in 200mL of water. I converted grams of NaOH to moles by 4g/40g/moles= 0.1moles. I calculated the concentration of NaOH by 0.1/(200mL/1000L)= 0.5 moles/L. I now have to record the expected mass of benzoic acid required to react

    asked by linda on January 13, 2010
  79. organic chemistry

    the crossed aldol condensation of acetaldehyde with benzaldehyde is aided by the face that benzaldehyde bears no alpha protons however a possible competitive reaction is the self condensation of two molecules of acetaldehyde. slow addition of acetaldehyde

    asked by ochemfreak on April 30, 2009
  80. Science

    I need to identify ways to reduce forms of pollution that my classmate put in their paper. Iron sulfide and coal seam was mentioned and how they react when exposed to air and water in the mining process, as well as form a mix of acid, sulfates, and metals

    asked by Mike on April 27, 2007
  81. 7th Grade Social Studies

    11. Where is the District of Columbia located? (2 points) in Georgia in North Carolina between the states of Maryland and Virginia in the West 12. What factor contributed to Chicago's rise as a steel-making and manufacturing center in the late 1800s? (2

    asked by Anonymous on March 29, 2013
  82. algebra

    In an experiment, the population P of bacteria is given by P=1000e^kt,where k is constant.If the size of population bacteria is found to be 3000 after 10 hours, what is the size of the population after 5 hours?Show me the solution please.

    asked by julie on October 10, 2016
  83. Math

    Amelia's soccer team won 3/4 of outgrew its games.The team won 18 games.How many games did the team play? Equation:3/4g=18 ,g is the total number of games. Possible solution: g=18×4/3,g is 24?

    asked by Mary on January 9, 2015
  84. Chemistry

    If a 0.1 mol/L solution is diluted to 0.01 mol/L, the: a) concentration of hydrogen ions increases b) pH decreases c) acidity constant decreases d) the acidity constant does not change I would think the ph decreases? no?

    asked by scilover on May 20, 2013
  85. Science

    Hydrogen chloride is added to a buffer solution of ammonia, NH3, and ammonium chloride, NH4Cl. What is the effect on the concentration of ammonia? On the concentration of ammonium chloride?

    asked by Nancy on March 11, 2008
  86. algebra 1

    Solve the following system of equations. You will type your x value in the first part and the y value in the second part of the question. If the answer is no solution then type NS in both parts and if the the answer is infinite solutions then type I in

    asked by Anonymous on January 11, 2018
  87. Math

    Solve the following system of equations by graphing. If the system is inconsistent or the equations are dependent, say so 5x-2y=3 10x-4y=6 I know the equations are dependent but I am confused on what is the solution set I'm thinking its (10x-4y=6) but I'm

    asked by Lataya on November 22, 2015
  88. Algebra 1

    Solve the following system of equations. You will type your x value in the first part and the y value in the second part of the question. If the answer is no solution then type NS in both parts and if the the answer is infinite solutions then type I in

    asked by Bill on December 14, 2017
  89. math

    A nurse wants to add water to 30 ounces of a 10% solution of benzalkonium chloride to dilute it to an 8% soultion. How much water nust she add?(hint water is 0% benzalkonium chloride)

    asked by jessica on January 15, 2009
  90. science

    A student needs to mix 50 ml. of glycine with 950 ml. of distilled water. This student has only a 25 ml. graduated cylinder. How many times will the student have to use the cylinder both glycine and water to prepare the solution?

    asked by BB on July 5, 2015
  91. algebra

    Solve the following system of equations. You will type your x value in the first part and the y value in the second part of the question. If the answer is no solution then type NS in both parts and if the the answer is infinite solutions then type I in

    asked by Harry on January 8, 2019
  92. algebra

    Solve the following system of equations. You will type your x value in the first part and the y value in the second part of the question. If the answer if no solution then type NS in both parts and if the the answer is infinite solutions then type I in

    asked by Anonymous on January 11, 2018
  93. english: essay

    Could someone give feedback on my expository essay? The concerns is the thesis, intro, conclusion and citations of the paper. Systemic Lupus Erythematosus (Lupus) Many years ago, my mother was diagnosed with Systemic Lupus Erythematosus. Every day since

    asked by marsha on December 1, 2008
  94. Informal Logic

    Looking to increase the profits of his lemonade stand, Johann doubled the price of a cup of lemonade from 25 cents to 50 cents. This clearly shows Johann’s lack of business sense, for now he’ll almost certainly sell fewer cups at the new price and

    asked by Donna on April 27, 2013
  95. English--Edgar Allen Poe

    I need some help with some questions about an excerpt from "The Tell-Tale Heart" by Edgar Allen Poe: "True! --nervous --very, very dreadfully nervous I had been and am; but why will you say that I am mad? The disease had sharpened my senses --not destroyed

    asked by Esmerelda on December 20, 2014
  96. algebra

    The rectangular floor of a shed has a length 4 feet longer than its width, and its area is 140 square feet. Let x be the width of the floor. (a) Write a quadratic equation whose solution gives the width of the floor. (b) Solve this equation.

    asked by bulatsu on July 8, 2012
  97. BioChem

    1.Suppose you had a buffer containing 0.5 moles of sodium monobasic phosphate and 0.5 moles of sodium dibasic phosphate. How many moles of hydrochloric acid would this phosphate buffer be able to accept before the pH of the solution began to change

    asked by Zaac on September 4, 2015
  98. Biology

    Father has red/green color blindness and is a hemophiliac. Mother is normal. Have two female children (Both are probably carriers). One female offspring marries a normal male. The question is what is the probability that their son is both color blind and

    asked by Frank on October 14, 2013
  99. chemistry

    The reaction of calcium bicarbonate, Ca(HCO3)2 with hydrochloric acid, HCl, produces a solution of CaCl2, gaseous carbon dioxide, CO2, and water, H2O. Write a balanced chemical equation for this reaction and determine the volume of CO2, in mL, that forms

    asked by terria on July 20, 2011
  100. Chemistry

    Solutions of NiSO4(aq), Al2 (SO4)3 (aq), CoSO4 , and SnSO4 (aq) are in bottles labelled A, B, C, and D. a) Design an experiment to identify which ionicsulfate solution is in which bottle. Give a list of equipment and chemicals required. Describe a

    asked by Sky on February 18, 2014