1. Chemistry

    Suppose that you used 0.75g of iron. What is the minimum volume of 1.5 M_ CuSO4 solution required Using eqn. (3-1)? and eqn. (3-2)?

    asked by Liza on September 12, 2015
  2. math

    show solution. in a certain eatery, there are 5 glass racks having 24 glasses and 8 left over. The answer says there are 130 glasses in all.

    asked by shawn on July 13, 2016
  3. science

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

    asked by Anonymous on October 15, 2009
  4. Chemistry

    A solution containing equal masses of glycerol, C3H8O3, and water has a density of 1.10 g/mL. Calculate the molality of glycerol. I got 11.9 m.

    asked by Student on February 14, 2016
  5. algebra

    Check whether the ordered pair is a solution to the equation x =3/4; (1/2, 3/4). Please show me step by step how you came up with this answer because I am really confused.

    asked by Joy Chapman on October 27, 2009
  6. Biology

    Identify/ name at least 1 biological science problem and prepare a procedure on how to solve such problem then recommend solution.

    asked by Gela on January 7, 2014
  7. Chemistry

    For a 0.47 M solution of LiClO compute the pH. Hi. I am confused about this question. I calculated the pH...but my answer is wrong. what am I doing wrong??? pH=-log(0.47) pH=0.33

    asked by J on November 13, 2016
  8. chemistry

    A 0.26 M solution of a diprotic acid, itaconic acid, has an [H+] of 6.0 10-3 M. What is the value of K1? I got answer like 2.6 10-1 ,I am not realy sure if u help me C5H6O4--> C5H5O4 + H+ K1 is constant

    asked by kelly on May 15, 2010
  9. chem

    a hydrocarbon has an empirical formula CH and a vapour density of 39. Determine its molecular formula. solution.................................................... CH=12+1 n=13 13n=39 =3

    asked by teegold on May 21, 2014
  10. Chemistry

    A solution of 22.0g of nonionic ascorbic acid in 100.0g of water freezes at – 2.33°C. What is the formula weight of the acid?

    asked by Jaques on May 8, 2014
  11. math

    what is the solution sets of the following a) 2x^-7x-5 b)5y^-16y+3 c)10x^+5y-6 d)10x^-13x+4 e)12y^-11y-5 f)10c^-21c+9 g)3m^+5m-2

    asked by Mohamed shiko on January 17, 2011
  12. chemistry

    Find the mass of urea needed to prepare 50.1 of a solution in water in which the mole fraction of urea is 7.50×10−2.

    asked by Kelley on January 28, 2012
  13. chemistry

    Describe how you would make 500.0mL of a 0.200M NaOH solution from a 15.0 stock NaOH conentration

    asked by Monique on November 6, 2011
  14. chemistry

    If 35.8 grams of LiCl are dissolved in 184 grams of water, what is the concentration of the solution in percent by mass?

    asked by smith on November 29, 2010
  15. science

    the hydrogen ion concentration in a mixture of 10ml 0.1 M H2SO4 AND 10ml 0.1M KOH solution in water is?

    asked by madhu on August 22, 2014
  16. chemistry

    how do you find the moles of solute and the molarity if the molar mas is 98.07, mass of solute is 62.0, and the volume of solution is 1.00?

    asked by denise on June 13, 2010
  17. Calculus

    If g(X) = 2+ln(x-5), find the inverse function, (g^(-1))(x) Solution: y = 2+ ln(x-5) e^y = 2 + x - 5 x = e^y + 3 y = e^x + 3 g^(-1) = y = e^x + 3 Is that right? I'm following an example - but don't really get it - how do I determine the domain and range -

    asked by Linda on September 3, 2016
  18. chemistry

    what volume of a 0.272 M solution of HBr is needed for a reaction that requires 49.5 g of HBr? Answer in units of L.

    asked by Anonymous on September 12, 2011
  19. chemistry

    indicate the concentration of each ion presentin the solution formed by mixing 20mL of .1M HCL and 10mL of .22 M HCL

    asked by fdg on December 6, 2011
  20. chemistry

    Find the mass of urea needed to prepare 51.7 of a solution in water in which the mole fraction of urea is 7.80×10−2.

    asked by amy on January 29, 2012
  21. Algebra 2

    An object is moving at a speed of 3 + 2 𝑓𝑡/𝑠. How long would it take the object to travel 20 𝑓𝑡? [looking for actual solution and not decimal approximation]

    asked by Bill on May 1, 2015
  22. Chemistry

    If a saturated solution prepared by dissolving solid BaSO4 in water has [Ba2+]= 1.04*10^5M, what is the value of Ksp for BaSO4?

    asked by Melissa on February 8, 2011
  23. chemistry

    use dimensional analysis to find how many moles of nitrate ions are in 40.0 mL of a 0.75 M aqueous solution of aluminum nitrate

    asked by M on August 22, 2011
  24. Chem

    What volume ( L ) of the solute ethanol should be mixed with 0.546 L of the solvent C4H8O to make a solution that is 8.44 m ethanol.

    asked by andy on February 12, 2010
  25. chemistry

    What is the molarity of H3O+ in a 5.33×10^-4 M NH2NH3Cl solution that hydrolyzes according to the equation. NH2NH3^+(aq) + H2O(l) = H3O^+(aq) + NH2NH2(aq)

    asked by Diem on May 5, 2010
  26. Chemistry

    Calculate the molar concentration of H+ ion of a solution that is 3.45×10-1 M in CH3CO2H and 1.62×10-3 M in the salt CH3CO2Li. CH3CO2H(aq) = CH3CO2-(aq) + H+(aq)

    asked by Jeby on May 5, 2010
  27. Math

    Solve the equation. (Enter solutions from smallest to largest. If there is no solution, enter NONE in the answer boxes.) 4x^2 = 7x + 2

    asked by darren on October 22, 2011
  28. Chemistry

    A current of 5.41 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 7.30 g of nickel?

    asked by At Least I Am Persistent. on April 2, 2014
  29. Chemistry

    Calculate the pH of the solution formed by adding 15.0ml of 0.1M sodium hydroxide to 30.0ml of 0.1M propanoic acid.

    asked by Fritz on January 19, 2014
  30. chemistry

    2 litre of NH3 at 30°C and at 0.20 atmosphere is neutralized by 134 mL of a solution of H2SO4. Calculate normality of H2SO4

    asked by jaimi on April 16, 2015
  31. Micoud secondary

    determine the number of electrons required to deposit 6.4g of copper from an aqueous solution of copper II sulphate

    asked by kaye on March 17, 2010
  32. Chemistry Help

    If 230.0 mL of 0.100 M H2SO4 are mixed with 280.0 mL of 0.300 M H2SO4, what is the molarity of the final solution? in M

    asked by MBH on October 3, 2011
  33. Chemistry

    For the reaction: Pb(NO3)2(aq) + 2KCl(aq)->PbCl2(s) + 2KNO3(aq) How many grams of PbCl2 will be formed from 63.0 mL of a 1.60 M KCl solution?

    asked by Terri on June 22, 2016
  34. Chemistry

    When 50.0 g of iron(3)nitrate, FE(NO3)3, is dissolved in water , the number of nitrate ions present in the solution is

    asked by Patrick on December 6, 2010
  35. algebra

    Solve the inequality, -3x - 2 < 5. Write the solution as an inequality with no spaces. You may leave the fraction in improper form.

    asked by Joshua on January 23, 2011
  36. Chemistry

    "Calculate the pH of 0.10 mol/L aqueous solution of aluminum sulfate." I am also given the ka value for the aluminum ion (9.8x10^-6)...but I don't know why I need it. I'm not even sure if I need to use it. Help please?

    asked by Stuck on May 1, 2010
  37. math

    what is the concentration of a sugar solution that contains 8g sugar dissolved in 500 ml water? answer in the form of a ratio

    asked by cheryl on November 20, 2011
  38. chem

    A weak acid, HA, has an ionization constant of 4.34 x 10-8. If we prepare a solution that is 0.273 M in HA what percent of the acid will be ionized

    asked by Anonymous on December 5, 2013
  39. chemistry

    What is the magnitude change in pH when 1.8g of NaOH is added 1L of a solution that is 0.100M in NH3 and 0.100 in NH4Cl? Kb for NH3 1.8 * 10^-5

    asked by Anonymous on June 21, 2014
  40. chemistry

    A 116.9 g sample of nitric acid solution that is 70.0% HNO3 (by mass) contains how many moles of HNO3? how did you get the answer

    asked by DIANA on December 5, 2011
  41. Chemisty!

    what are the molarities of Mb^2+ ions and Cl- ions in an aqueous solution of 4.00% by the mass magnesium chloride, with a density of 1.15g mL-1?

    asked by Wade on December 14, 2010
  42. logarithms

    Solve the logarithm equation. Express the solution in exact form only. log[6](64x^3+1)-log[6](4x+1)=1

    asked by Jennifer on January 3, 2012
  43. Chemistry

    A 335 -mL can of soda pop is found to contain 40 g of sucrose (C12H22O11). What is the molarity of the solution with respect to sucrose?

    asked by Kelsey G on November 30, 2010
  44. chemestry

    Calculate the pH of a solution obtained dissolving 10 g of NH3 and 15 g of NH4Cl in 300 ml of water (Kb NH3 = 1.8 x10-5).

    asked by Anonymous on June 19, 2016
  45. chemistry 12

    A) Calculate [OH^-] in a o.12 M solution of hydrazine, H2NNH2(aq), having K of 3.0x10^-6. B) what is the percent ionization of the H2NNH2(aq) I can't get these for the life of mee!

    asked by Jacob on October 5, 2011
  46. chemistry

    150 mL of a 4.00 molar NaOH solution is diluted with water to a new volume of 1.00 liter. What is the new molarity of the NaOH?

    asked by vee on October 5, 2011
  47. chemistry

    does the ph change and how much difference is there (double, triple, same or half) for a solution of 0.1M NaHCO3 vs 0.2M NaHCO3 (volume constant)? Kb not known?

    asked by Larry on April 13, 2010
  48. Chemistry

    Predict the products of the electrolysis of a solution of aqueous MnSO4 given the following choices: a. H2SO3 (aq) b. O2 (g) c. H2 (g) d. OH- (aq) e. Mn (s) f. e- g. H+ (aq) how is the answer O2 and H2SO3?

    asked by Sara on June 16, 2015
  49. science

    what is the concentration of a sugar solution that contains 8 g sugar dissolved in 500 ml of water? explain in ration form

    asked by cheryl on November 20, 2011
  50. Chemistry

    What must be the molarity of an acetic acid solution if it has the same percent ionization as 0.150M HC3H5O2 propionic acid,Ka=1.3*10^-5 )?

    asked by Tiana on February 16, 2012
  51. Calculus

    Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)

    asked by Mike on January 24, 2013
  52. Chemistry

    A current of 3.94 A is pass through a Pb(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 5.40 g of lead?

    asked by Brianna on July 24, 2013
  53. algebra1

    can you guys please graph the system of inequalities and clasify the solution of y¡Ü4x+4 y¡Ü-0.25x+4 y¡Ý4x-1 y¡Ý-0.25x-1

    asked by jenika on May 17, 2012
  54. chemistry

    Calculate the air concentration (mol/l) of phenol in equilibrium with solution including 100 g/m3 of phenol.(T=25 C)

    asked by Osama on September 30, 2014
  55. chemistry

    what volume of 0.150M Li2Sr solution is required to completely react with 130ml of 0.150M Co(NO3)2

    asked by Jake on October 17, 2014
  56. Chemistry

    A current of 5.61 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 9.00 g of nickel?

    asked by Anon on March 29, 2013
  57. Chemistry

    What volume of concentrated hydrochloric acid (12.0 M HCl) is required to make 2.0 liters of a 3.0 M HCl solution?

    asked by Wilson on March 25, 2016
  58. solution making/ chemistry/biotech

    You have 750ml's of a solution that was originally made up using a 20X stock. How much stock was used? I think the answer is 37.5 by dividing 750/20 but I am not sure

    asked by frank on February 26, 2015
  59. Density of CUSO4

    I don,t know if this helps but the Soln of CUSO45H2O is 1%, the mass solution is 100g and the mass of CUSO4 5H2O is 1g.

    asked by Lorraine on March 6, 2011
  60. College Algebra

    Classify the equation as a conditional equation, an identity, or a contradiction and then state the solution. 24a+14=6(8a+3)-26a+4

    asked by Anonymous on September 2, 2017
  61. chemistry

    A solution of 25.0mL of 0.10mol/L hydroiodic acid is titrated with 0.10mol/L ammonia.Determine the pH at equivalence.

    asked by rana on January 29, 2017
  62. MATH

    Solve the equation. (Enter solutions from smallest to largest. If there is no solution, enter NONE in the answer boxes.) x2 - 5x + 5 = 0

    asked by Anonymous on July 12, 2011
  63. Chemistry

    How many milliliters of a 0.81 M HCl solution are needed to react completely with 2.2 g of zinc to form zinc(II) chloride?

    asked by Emily on September 29, 2012
  64. Chemistry

    What is the mass of gas dissolved in a solution at 150kPa if 0.35g of the gas dissolves in 2.0L of water at 30kPa?

    asked by Jennifer on March 3, 2013
  65. Chemistry

    How many moles of benzoic acid, a monoprotic acid with Ka=6.4×10^-5, must dissolve in 250mL of H2O to produce a solution with pH=2.04

    asked by Khadijah on April 3, 2017
  66. Science!

    Which of the following is not a process of a stream load? A. Suspension B. Bed Load C. Materials in solution D. Divide Im thinking D but also C?

    asked by Morgan on September 8, 2014
  67. chemistry

    A 25.0 mL solution of HCl has been spilt. It took 21.8 mL of saturated 2.5 M NaOH to neutralise the acid. What was the molar concentration of the acid?

    asked by sarah on August 7, 2013
  68. Chem

    What is the pH of a 0.115 mol/L solution of sodium acetate, CH3COONa, at 25oC? (pKa=4.74 at 25oC for CH3COOH.)

    asked by M on April 3, 2016
  69. 12 chemistry

    What is the average ion concentration in a 7.9 mL saturated solution of calcium hydroxide containing calcium chloride (CaCl2)?

    asked by Erica on April 24, 2007
  70. chemistry

    exactly 20 mL of .0520M Pb(NO3)2 is diluted to a final volume of 100 mL. What is the molar concentration of the diluted solution?

    asked by chelsea on June 13, 2011
  71. CHemistry

    What is the pH of the resulting solution when 0.20 mole of NaF and 0.05 mole HCl are added to 100 mL water? The Ka for HF is 3.95x10^-4M

    asked by Mike on March 1, 2015
  72. Chemistry, Urgent!

    I can't solve this! I keep trying but I can't get it. Suppose 25mL of 1.00M HCl is added to 50mL of 1.00M HF. What is the pH of the HF in this solution? The pH is supposed to be 0.48 Thanks. -K.

    asked by Kearstyn on February 26, 2009
  73. Chemistry

    Calculate the pH of the following buffer solution that resulted from 125ml of 0.1M NH3 with 250ml 0.1 M NH4Cl ( for NH3, Kb= 1.76x10^-5)

    asked by Grace on April 16, 2013
  74. Chemistry

    Calculate the pH of the following buffer solution that resulted from 125ml of 0.1M NH3 with 250ml 0.1 M NH4Cl ( for NH3, Kb= 1.76x10^-5)

    asked by Grace on April 16, 2013
  75. Maths

    How many moles of NaOH can be added to 1L solution 0.1M in NH3 and 0.1 M in NH4Cl without changing the POH by more than 1 unit kb NH3 = 1.8 into 10^_5

    asked by Kkk on December 12, 2016
  76. chemistry

    A solution which contains 40.3 g of an unknown molecular compound in 360 g of water freezes at -5.07°C. What is the molar mass of the unknown?

    asked by paul on November 26, 2012
  77. Chemistry AP

    Calculate the pH of a 0.44 M aqueous solution of NH4Cl. Kb = 1.8 × 10−5 . I've tried used the Ka=Kw/Kb equation then used the resulting 5.5e-10 in Kw=([H+][Cl-])/[NH4Cl] , using that to get the [H+], but it isn't correct and I don't know what else to

    asked by Ethan on February 5, 2015
  78. Chemistry

    An unknown solution may contain one of the ions of the pair below. Devise a test which allows you to distinguish between the ions. Cu2+(aq) and Co2+ (aq)

    asked by Charlie on November 29, 2012
  79. Calculus

    Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)

    asked by Mike on January 23, 2013
  80. Calculus

    Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)

    asked by Mike on January 23, 2013
  81. chemistry

    What is the acid dissociation constant for a 0.010 M solution of the unkown acid HX that has a pH of 2.70 at equilibrium? I know the answer but not how to get it, please help? Thanks in advance.

    asked by ciaociao on November 29, 2012
  82. chemistry

    Suppose you mix 20.1 g of water at 66.2°C with 44.6 g of water at 35.7°C in an insulated cup. What is the maximum temperature of the solution after mixing?

    asked by caroline on October 29, 2010
  83. health science chemistry

    How many ml of water should be added to 20.0 ml of a stock of 12.0 M HCl solution to make 1.50 M HCl ?assume that the volumes are additive.

    asked by konja on May 4, 2016
  84. Chemistry

    When we add a large amount of etilendiamine to a solution NiSO4 a lila precipitate is observed, what is this precipitate)

    asked by Mary on November 23, 2007
  85. Chemistry

    The ksp of aluminum hydroxide is 5.6e-17. What is the concentration of hydroxide in a saturated solution? For the answer I got [AlOH] [Al] [OH]^2 5.6e-17 x 3x 5.6e-17 = 3x^4 x = 6.6e-5 Is this right? I'm not sure about 3x^4 part...

    asked by Kat on June 5, 2011
  86. Chemistry

    How many moles of mercury will be produced by electrolysis 1 m hg (no3)^2 solution with a current of 2A for 3 hours. Hg (no3)^2=200.6

    asked by Amrish gaur on July 25, 2018
  87. Chemistry

    Calculate the mass of sugar, C12H22O11, in 280.4 mL of a 1.49 M solution of sugar. (atomic weights: C = 12.01, H = 1.008, O = 16.00)

    asked by Abby on November 3, 2014
  88. chemistry

    calculate the mass in grammes of copper that will be deposited by dissolving 6.5g of zinc in copper tetraoxosulphate(vi) solution

    asked by jer on November 8, 2015
  89. Chemistry

    What is the (a) molality, (b) freezing point, and (c) boiling point of a solution containing 2.29 g napthalene (C10H8) in 44.6 g of benzene (C6H6)?

    asked by C on April 19, 2013
  90. science

    ind the molality of the solution obtained when 36.5 gram HNO3 is dissoloved in 750 gram water

    asked by tanay patel on September 23, 2014
  91. Chemistry

    If 45.8 grams of MgO are dissolved in 205 grams of water, what is the concentration of the solution in percent by mass?

    asked by ilyrae on March 21, 2011
  92. chemistry

    Explain in words how you would prepare 250 ml of a 3.000 M solution of Ba(OH)2 starting from a two liter bottle of 12.000 M Ba(OH)2

    asked by lalo on October 11, 2010
  93. Chemistry 30

    How do I complete an ICE table for a solution of nitrous acid, HNO2, one of the acids associated with acid deposition?

    asked by Iris on December 31, 2012
  94. science

    the ph of a 0.280m solution of a weak base. B has been measured ph --8.69. using this information. calculate the base ionisationconstant kbof b

    asked by Emily on September 14, 2012
  95. chem

    A weak acid, HA, has an ionization constant of 9.29 x 10-6. If we prepare a solution that is 0.727 M in HA what percent of the acid will be ionized?

    asked by jess on November 30, 2014
  96. chemistry

    What mass of MgSO4 · 7H2O is required to prepare 300 mL of a 0.61 M MgSO4 solution? Answer in units of g

    asked by cheri on September 13, 2012
  97. chemistry

    What reagent is commonly used for alcohol oxidation? a. Na2Cr2O7 b.Benedict's Solution c.H2SO4 d. Tollen's Reagent

    asked by paul on March 29, 2018
  98. solution making/ chemistry/biotech

    You have 750ml's of a solution that was originally made up using a 20X stock. How much stock was used? I think the answer is 3.75 by dividing 750/20 but I am not sure

    asked by sonya on February 23, 2015
  99. Chemistry Urgent please help! Test tomorrow

    if you have a mixture of sodium chloride and sodium bromide, could you use its conductance to determine the concentration of each solution? explain

    asked by Anonymous on January 9, 2013
  100. chem

    A 25.0 mL sample of 0.723 M HClO4 is titrated with a KOH solution. The H3O+ concentration after the addition of of KOH is

    asked by dj westfall on December 16, 2014