cheri

Most popular questions and responses by cheri
  1. math

    An electronics store receives a shipment of 20 graphing calculators, including 3 that are defective. Four of the calculators are selected to be sent to a local high school. A. How many selection can be made using the originial shipment?

    asked on March 8, 2011
  2. chemistry

    If you analyzed each of the substances NaBr, KOH, CrPO4, Pb(OH)2, RbCl, LiNO3 by mixing them with water in a beaker, which substances would be most likely to fall to the bottom of the beaker? 1. KOH and Pb(OH)2 2. CrPO4 and LiNO3 3. NaBr 4. RbCl and LiNO3

    asked on September 19, 2012
  3. ap chemistry

    Rank the compounds CH3OH CH3CH2OH CH3CH2CH2OH in terms of increasing evaporation rate. 1. CH3CH2CH2OH < CH3OH < CH3CH2OH 2. CH3OH < CH3CH2CH2OH < CH3CH2OH 3. CH3OH < CH3CH2OH < CH3CH2CH2OH 4. CH3CH2OH < CH3CH2CH2OH < CH3OH 5. CH3CH2CH2OH < CH3CH2OH < CH3OH

    asked on April 15, 2013
  4. ap chemistry

    What pressure would a mixture of 3.2 grams of O2, 6.4 grams CH4, and 6.4 grams of SO2 exert if the gases were placed in a 5.1 liter container at 127C? Answer in units of atm

    asked on February 9, 2013
  5. ap

    The reaction 2Na+ + 2Cl− ! 2Na + Cl2 is indicative of ? cell; the sign of the anode is ? ; and ? forms at the cathode. 1. an electrolytic; negative; Na+ 2. a voltaic; positive; Na 3. an electrolytic; positive; Na 4. an electrolytic; positive; Cl2 5. a

    asked on October 5, 2012
  6. chemistry

    Which of the species KClO2, NH4Br, HNO2, PbS is/are insoluble in water? 1. NH4Br and NH3 2. KClO3 3. PbS 4. HNO2 5. All of these

    asked on September 19, 2012
  7. ap chemistry

    Which of I) HCl II) HF III) LiOH IV) HClO2 V) HNO3 are strong acids or strong bases in water?

    asked on February 28, 2013
  8. chemistry

    When 0.025 moles of aluminum sulfate are dissolved in enough water to make 115 milliliters of solution, what is the molarity of sulfate ions? Answer in units of M

    asked on September 13, 2012
  9. chemistry

    Which one of the following substances is LEAST soluble in water? 1. BaCO3 2. KSCN 3. Na3PO4 4. RbOH 5. LiBr

    asked on September 19, 2012
  10. ap chemistry

    The system CO2(g) + H2(g) *) H2O(g) + CO(g) is at equilibrium at some temperature. At equilibrium a 4.00 L vessel contains 1.00 mole CO2, 1.00 mole H2, 2.40 moles H2O, and 2.40 moles CO. How many moles of CO2 must be added to the system to bring the

    asked on January 30, 2013
  11. ap chemistry

    How much heat is released if 2.00 moles CF2Cl2 reacts with 70.0 g F2 with a 75.0 percent yield? CF2Cl2 + F2 ! CF4 + Cl2 H for this reaction is -401 kJ/mol rxn. 1. 553 kJ 2. 739 kJ 3. 985 kJ 4. 601 kJ 5. 1069 kJ 6. 802 kJ

    asked on October 31, 2012
  12. ap chemistry

    A 6.9 gram sample of a gaseous substance occupies 10 L at 63C and 537 torr. What is the density of the gas under these conditions? Answer in units of g/L

    asked on February 9, 2013
  13. chemistry

    Which of the following aqueous solutions should form a precipitate with aqueous Fe(NO3)3? 1. KNO3 2. KCl 3. K2SO4 4. KOH

    asked on September 19, 2012
  14. chemistry

    Suppose that you wanted to be sure that a metal ion, any metal ion, would dissolve in water. What salt of the metal ion compound would you choose? 1. the hydroxide (OH−) salt of the metal ion 2. the carbonate (CO2− 3 ) salt of the metal ion 3. the

    asked on September 19, 2012
  15. ap chemistry

    Given the following information, which of the following shows the acids in order from strongest to weakest? The order of atomic radii is I > Br > Cl, the order of bond strengths is HOI > HOBr > HOCl, and the order of electronegativities is Cl > Br > I.

    asked on February 27, 2013
  16. chemistry

    Which response includes all of the following LiOH, KOH, Ni(OH)2, Mg(OH)2, Ca(OH)2 that are insoluble bases, and no others? 1. Mg(OH)2 2. LiOH, Mg(OH)2, Ca(OH)2 3. Mg(OH)2, Ca(OH)2 4. Ni(OH)2, Mg(OH)2 5. LiOH, Ni(OH)2

    asked on September 19, 2012
  17. chemistry

    Consider the following reaction CaCl2(aq) + 2Ag2SO4(aq) ! CaSO4(?) + 2AgCl(?) .Which of the following statements is true? 1. Both CaSO4 and AgCl will precipitate from solution. 2. Neither CaSO4 nor AgCl will precipitate from solution. 3. CaSO4 will

    asked on September 19, 2012
  18. ap chemistry

    Consider the reaction Ni(s) + 4CO(g) ! Ni(CO)4(g) Assuming the gases are ideal, calculate the work done on the system at a constant pres- sure of 1 atm at 75C for the conversion of 1.00 mole of Ni to Ni(CO)4.

    asked on October 31, 2012
  19. ap

    Sodium, potassium, and rubidium are good 1. oxidizing agents. 2. reducing agents. 3. bases.

    asked on October 5, 2012
  20. ap

    Identify the type of reaction C4H10(g) + O2(g) ! CO2(g) + H2O(g) 1. hydrocarbon synthesis 2. single displacement 3. incomplete combustion 4. complete combustion

    asked on October 1, 2012
  21. ap chemistry

    Carbon monoxide reacts with oxygen to form carbon dioxide by the following reaction: 2CO(g) + O2(g) ! 2CO2(g) H for this reaction is −135.28 kcal. If 811.7 kcal is released, how many moles of CO must have reacted?

    asked on October 31, 2012
  22. ap chemistry

    What types of intermolecular interactions does chloroform (CH3Cl) exhibit? I) London dispersion II) dipole-dipole III) hydrogen bonding IV) covalent bonding Recall that chloroform is tetrahedral elctronic geometry with C as the central atom.

    asked on October 31, 2012
  23. chemistry

    In choosing a primary standard we generally choose something that 1. All of these are properties we want in a primary standard. 2. has a low percent purity. 3. None of these are properties we want in a primary standard. 4. has several different possible

    asked on September 19, 2012
  24. chemistry

    A variety of ions including Na+, K+, NH4 +, Pb2+, Fe2+, NO3 −, Cl−, Br−, S2−, and CO3 2− are mixed in a beaker of water. If you analyzed the precipitates, which substances would you expect to find? 1. PbS and FeCO3 2. FeCl2 and KCl 3. NaBr and

    asked on September 19, 2012
  25. ap chemistry

    In the reaction below, 22 g of H2S with excess O2 produced 10 g of sulfur. ?H2S + ?O2 ! ? S + ?H2O. What is the percent yield of sulfur? Answer in units of %

    asked on September 11, 2012
  26. 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 on September 13, 2012
  27. chemistry

    Which of the following aqueous solutions should NOT form a precipitate with aque- ous Ba(NO3)2? 1. K3PO4 2. K2SO4 3. K2CO3 4. KOH

    asked on September 19, 2012
  28. ap chemistry

    The reaction of 9.5 grams of fluorine with excess chlorine produced 5.9 grams of ClF3. What percent yield of ClF3 was obtained? Answer in units of %

    asked on September 11, 2012
  29. ap chemistry

    Arrange the bases I) deuterated ammonia (ND3) Kb = 1.1 × 10−5; II) hydrazine (NH2NH2) Kb = 1.7 × 10−6; III) hydroxylamine (NH2OH) Kb = 1.1 × 10−8; IV) ammonia (NH3) Kb = 1.8 × 10−5; in decreasing order of strengths.

    asked on February 27, 2013
  30. ap chemistry

    Iron pyrite (FeS2) is the form in whichmuch of the sulfur exists in coal. In the combustion of coal, oxygen reacts with iron pyrite to produce iron(III) oxide and sulfur dioxide, which is a major source of air pollution and a substantial contributor to

    asked on February 10, 2013
  31. ap chemistry

    If 300 mL of 3.9 molar HCl solution is added to 200 mL of 2.2 molar NaOH solution, what will be the molarity of NaCl in the resulting solution? Answer in units of M

    asked on March 5, 2013
  32. ap chemistry

    Which of the following reactions as written corresponds to a standard formation reaction? 1. 2H (g) + O2(g) ! H2O2 (`) 2. Na(s) + 1 2 Cl2(g) ! NaCl(s) 3. CO2(s) ! CO2(g) 4. SO2(g) + 1 2 O2(g) ! SO3(g) 5. 2 H2(g) + O2(g) ! 2 H2O(`)

    asked on October 31, 2012
  33. ap

    An excess of aqueous AgNO3 reacts with 44.5 mL of 5 M K2CrO4(aq) to form a precip- itate. What is the precipitate? 1. K2CrO4 2. KNO3 3. Ag2CrO4 4. AgNO3 What mass of precipitate is formed? Answer in units of g

    asked on October 1, 2012
  34. ap chemistry

    Nitroglycerin is a shock-sensitive liquid that detonates by the reaction 4C3H5(NO3)3(`) −! 6N2(g) + 10H2O(g) + 12CO2(g) + O2(g) Calculate the total volume of product gases at 210 kPa and 296C from the detonation of 2.7 lb (1224.7 g) of nitroglycerin.

    asked on February 9, 2013
  35. ap

    What is a poor conductor of electricity? 1. mercury 2. molten NaCl 3. copper 4. potassium 5. sulfur

    asked on October 5, 2012
  36. ap chemistry

    A 1.50 liter tank filled with helium at 125 atm is used to fill balloons. The pressure in each balloon is 950 torr and the volume of each balloon is 1.20 liters. How many balloons can be filled? Answer in units of balloons

    asked on February 9, 2013
  37. ap chemistry

    An oxygen sample has a volume of 5 L at 27C and 800 torr. How many oxygen molecules does it contain?

    asked on February 9, 2013
  38. Physics

    A proton and an electron have the same kinetic energy upon entering a region of constant magnetic field. What is the ratio of the radii of their circular path?

    asked on October 27, 2010
  39. ap chem

    A sample of 7.45 grams of NaOH is dissolved into 609 mL of aqueous 0.250 M NaOH (as-sume no volume change). This solution is then poured into 2.18 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in

    asked on September 16, 2012
  40. ap chemistry

    An apparatus consists of a 2 L flask containing nitrogen gas at 25C and 819 kPa, joined by a valve to a 12 L flask containing argon gas at 25C and 51 kPa. The valve is opened and the gases mix. What is the partial pressure of nitrogen after mixing?

    asked on February 9, 2013
  41. ap

    If aqueous hydrofluoric acid is reacted with sodium hydroxide, which of the following sub- stances are in the net ionic equation? 1. fluoride ion, hydronium ion, and water 2. hydrofluoric acid, sodium ion, hydroxide ion, and fluoride ion 3. hydrofluoric

    asked on October 1, 2012
  42. ap

    An excess of aqueous AgNO3 reacts with 44.5 mL of 5 M K2CrO4(aq) to form a precip- itate. What is the precipitate? 1. K2CrO4 2. KNO3 3. Ag2CrO4 4. AgNO3

    asked on October 1, 2012
  43. ap chemistry

    A 115 mg sample of eugenol, the compound responsible for the odor of cloves, was placed in an evacuated flask with a volume of 500 mL at 280C. After the eugenol completely evap- orated, the pressure that it exerted in the flask under those conditions was

    asked on February 9, 2013
  44. chemistry

    Sulfuric acid (H2SO4) is a very strong diprotic acid. If 0.062 moles of sulfuric acid is mixed with water to make 200 mililiter of solution, what is the molarity of H+? Answer in units of M

    asked on September 13, 2012
  45. math

    if a movie theater holds 1200 and 2/3 of its seat how many tickets does sell

    asked on April 29, 2015
  46. 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 on September 16, 2012
  47. ap chemistry

    At a certain temperature, the equilibrium constant Kc is 0.154 for the reaction 2 SO2(g) + O2(g) *) 2 SO3(g) What concentration of SO3 would be in equilibrium with 0.250moles of SO2 and 0.853 moles of O2 in a 1.00 liter container at this temperature? Note:

    asked on January 28, 2013
  48. chemistry

    Silver nitrate (AgNO3) reacts with sodium chloride as indicated by the equation AgNO3 + NaCl ! AgCl + NaNO3 . How many grams of NaCl would be re- quired to react with 511 mL of 0.38 M AgNO3 solution? Answer in units of grams

    asked on September 19, 2012
  49. ap chemistry

    A 0.456 gram sample of an unknown mono- protic acid (let’s call it HZ) was dissolved in some water (you pick the amount). Then the acidic solution was titrated to the equivalence point with 32.5 mL of 0.174 M KOH. What is the molecular weight of the

    asked on March 5, 2013
  50. ap chemistry

    Jeff and Jill go canoeing. While reaching to feed a duck, the boat flips. Jeff and Jill blow up their inflatable life preservers and then put them on. As they wait for the rescue squad, they calculate how much nitrogen is in each life preserver. They

    asked on February 9, 2013
  51. ap chemistry

    3.5 g of a hydrocarbon fuel is burned in a ves- sel that contains 250. grams of water initially at 25.00 C. After the combustion, the temper- ature of the water is 26.55 C. How much heat is evolved per gram of fuel burned?

    asked on October 31, 2012
  52. ap chemistry

    Consider the reaction 2 Al2O3(s) ! 4 Al(s) + 3 O2(g) . H = +3339.6 kJ/mol What is the change in heat when 0.455 L of a 3.60 M Al solution reacts with excess O2 ?

    asked on October 31, 2012
  53. College Physics

    An amusement park mirror shows anyone who stands 2.5 meters in front of it an upright image two times the person's height. What is the mirror's radius of curvature?

    asked on November 17, 2010
  54. ap chemistry

    A sample of gas occupies 4 mL at STP. At what pressure would this sample occupy 500 mL if the temperature is changed to 525C? Answer in units of torr

    asked on February 9, 2013
  55. ap

    Chlorine, bromine, and iodine are good 1. oxidizing agents. 2. reducing agents. 3. bases.

    asked on October 5, 2012
  56. ap

    The net ionic equation for ALL aqueous reac-tion of strong acids and strong soluble bases that form soluble salts is 1. the formation of H2O from H+ and OH−. 2. the formation of water and the corresponding salt. 3. the formation of water from the

    asked on October 1, 2012
  57. chemistry

    We add excess NaCl solution (58.44 g/mol) to 56 mL of a solution of silver nitrate (AgNO3 169.88 g/mol), to form insoluble solid AgCl. When it has been dried and weighed, the mass of AgCl (143.32 g/mol) is found to be 1.25 grams. What is the molarity of

    asked on September 19, 2012
  58. ap chemistry

    The energy change H associated with the reaction NBr3(g) + 3H2O(g) ! 3HOBr(g) + NH3(g)is +81 kJ/mol rxn. These bond energy values might be useful:O-H 459 kJ/mol; N-H 386 kJ/mol;O-Br 201kJ/mol. The strength of the N Br bond is

    asked on October 31, 2012
  59. ap

    Which of the following metals or nonmetals are expected to displace Mn or Cl (respec- tively) from MnCl2? 1. Cu should displace Mn. 2. I should displace Cl. 3. Ca should displace Mn. 4. Br should displace Cl.

    asked on October 1, 2012
  60. apchemistry

    The numerical value of the concentration equilibrium constant for the gaseous reaction 2 SO2 + O2 *) 2 SO3 is 0.5 at temperature T. When a reactionmix- ture is brought to equilibrium, [O2] is found to be 2.0 M and [SO3] is found to be 10 M. What is the

    asked on January 30, 2013
  61. ap chemistry

    At 350 K, Kc = 0.142 for the reaction 2BrCl(g) *) Br2(g) + Cl2(g) An equilibrium mixture at this temperature contains equal concentrations of bromine and chlorine, 0.069 mol/L. What is the equilib- rium concentration of BrCl? Answer in units of M

    asked on January 28, 2013
  62. ap chemistry

    What is the density of hydrogen sulfide (H2S) at 0.9 atm and 295 K? Answer in units of g/L

    asked on February 9, 2013
  63. chemistry

    How many grams of sucrose (C12H22O11) must be dissolved in 200 g water to make a solution in which the mole fraction of su- crose is 0.1? Answer in units of g

    asked on September 16, 2012
  64. ap chemistry

    1.95 mol of an ideal gas at 300 K and 3.00 atm expands from 16 L to 28 L and a final pressure of 1.20 atm in two steps: (1) the gas is cooled at constant volume until its pressure has fallen to 1.20 atm, and (2) it is heated and allowed to expand against a

    asked on October 31, 2012
  65. chemistry

    HCN is mixed with water. Which is the best description of what you would expect to find in the solution? 1. CN+, OH−, and water molecules 2. HCN molecules and water molecules 3. H2CN+, OH−, and water molecules 4. HCN molecules, H3O+, CN1−, and water

    asked on September 19, 2012
  66. ap chemistry

    Suppose that a sample of gas occupies 117 mL of volume at 25C and a pressure of 289 torr. What would be the volume if the pressure were changed to 490 torr at 25C? Answer in units of mL

    asked on February 9, 2013
  67. ap chemistry

    Propane (C3H8) is burned in oxygen to pro- duce carbon dioxide and water. The heat of combustion of propane is -2012 kJ/mole. How much heat is given off when 3.0 mol C3H8 are reacted with 10.0 mol O2? 1. 4024 kJ 2. 2012 kJ 3. 916 kJ 4. 1555 kJ 5. 5122 kJ

    asked on October 31, 2012
  68. ap chemistry

    Calculate the standard reaction enthalpy for the reaction NO2(g) ! NO(g) + O(g) Given: O2(g) ! 2O(g) H = +498.4 kJ/mol NO(g) + O3(g) ! NO2(g) + O2(g) H = −200 kJ/mol 3O2(g) ! 2O3(g) H = +285.4 kJ/mol

    asked on October 31, 2012
  69. ap chemistry

    On a hot sunny day in August, the weather- man reports that the barometric pressure is 49 atm atmospheres. How many Pascals is this? Answer in units of Pascals

    asked on February 9, 2013
  70. ap chemistry

    Consider the reaction 2 Al2O3(s) -> 4 Al(s) + 3 O2(g) . H = +3339.6 kJ/mol How much heat is generated when 0.455 L of a 3.60 M Al solution reacts with 1.05 mole O2 ?

    asked on October 31, 2012
  71. ap

    Classify the reaction (NH4)2Cr2O7 ! N2 + 4 H2O + Cr2O3 as one or more of the following: Z1) combination Z4) metathesis Z2) decomposition Z5) displacement Z3) redox 1. Z2 only 2. Z2 and Z5 only 3. Z2 and Z3 only 4. Z3 and Z5 only 5. Z1 and Z3 only

    asked on October 1, 2012
  72. chemistry

    Calculate the molality of CsCl in a 19% by mass aqueous solution.

    asked on September 13, 2012
  73. ap chemistry

    How much work is done by the system when 2.00 moles of O2 expand from a volume of 3.00 liters to a volume of 8.1 liters against a constant external pressure of 0.0100 atm? Answer in units of J

    asked on October 31, 2012
  74. ap chemistry

    What is the value of w (work) when 1.3 moles of H2 expands from 25 liters to 50 liters against a constant external pressure of 1 atm, then expands further from 50 to 100 liters against a constant external pressure of 0.1 atm? Answer in calories. Answer in

    asked on October 31, 2012
  75. ap

    A volume of equimolar strong acid like HCl is mixed with an equal volume of equimolar strong base like NaOH in a beaker of water. What exists after the reaction? 1. mostly water molecules and HCl, NaOH, and NaCl molecules 2. mostly water molecules and Na+

    asked on October 1, 2012
  76. ap

    A saturated solution of which of the follow- ing substances in water would be the best conductor of electricity? 1. CH4 2. Hg2Cl2 3. HCl 4. NH3 5. CH3COOH

    asked on October 5, 2012
  77. chemistry

    Listerine mouthwash is 21.6%ethyl alcohol by volume. What mass of ethanol is contained in 20.0 mL of mouthwash? (The density of ethanol is 0.789 g/mL.) Answer in units of grams

    asked on September 19, 2012
  78. ap chemistry

    What amount of energy is required to com- pletely ionize 26.9 grams of carbon atoms in the gas phase (C(g)) if the ionization energy of C(g) is 1086 kJ/mole? Answer in units of J

    asked on April 15, 2013
  79. ap

    A ruptured tank in Anywhere, USA, spilled hydrochloric acid. Officials were reported to be concerned that the acid might mix with sodium hydroxide (caustic soda) in a neigh- boring tank and form a toxic gas. What toxic gas would be formed by mixing

    asked on October 1, 2012
  80. ap

    Which of the following is best described as an acid-base reaction? 1. NaCl + AgNO3 !NaNO3 + AgCl 2. NH3 + H2O ! NH+ 4 + OH− 3. 2HgO ! 2 Hg + O2 4. Ca + 2H2O ! Ca(OH)2 + H2 5. KCl + NH4NO3 ! KNO3 + NH4Cl

    asked on October 1, 2012
  81. ap chemistry

    Acid rain has a pH value of 3.0, whereas normal rain has a pH value of 5.6. Calculate the ratio of the hydronium ion in acid rain to that in normal rain.

    asked on February 28, 2013
  82. ap chemistry

    To what temperature must a sample of helium gas be cooled from 123C to reduce its volume from 3.7 L to 0.27 L at constant pressure? Answer in units of K

    asked on February 9, 2013
  83. chemistry

    We add excess Na2CrO4 solution to 27.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.420 grams. What is the molarity of the AgNO3 solution? Answer in

    asked on September 19, 2012
  84. chemistry

    How many milliliters of a 0.5 molar HCl solution are needed to react completely with 11 grams of zinc according to the following equation? ? HCl + ? Zn ! ? ZnCl2 + ? H2 Answer in units of mL

    asked on September 19, 2012
  85. chemistry

    Calculate the molality of acetone in an aqueous solution with a mole fraction for ace- tone of 0.171. Answer in units of m

    asked on September 16, 2012
  86. ICP

    What is the value of work done on an object when a 10-newton force moves it 30 meters and the angle between the force and the displacement is 25°?

    asked on June 22, 2015
  87. ap chemistry

    A 37 mL sample of a solution of sulfuric acid is neutralized by 42 mL of a 0.113 M sodium hydroxide solution. Calculate the molarity of the sulfuric acid solution. Answer in units of mol/L

    asked on March 5, 2013
  88. ap chemistry

    We drop 37.4 grams of magnesium into 461 mL of a 3 M HCl solution. What is the maximum volume of dry hydrogen that could be produced by this reaction at STP? Mg(s) + 2HCl(aq) ! MgCl2(aq) + H2(g) Answer in units of liters

    asked on February 10, 2013
  89. ap chemistry

    We mix 146 grams of oxygen gas with 117 grams of argon gas in a volume of 436 mL at 58C. What will be the final pressure of the gas mixture? Answer in units of atm

    asked on February 9, 2013
  90. ap

    Very small mercury batteries have been made and used in a multitude of applications. Why have they been replaced by other kinds of batteries for most applications? 1. These batteries cannot generate enough current for any modern devices. 2. Mercury is

    asked on October 5, 2012
  91. chemistry

    What mass of silver nitrate (AgNO3) is re- quired to prepare 400 g of a 3.50% solution of AgNO3? 1. 14 g 2. 0.00875 g 3. 114.28 g 4. 1400 g

    asked on September 19, 2012
  92. 2nd grade

    What number am I My tens digit is double my ones digit. I am less than 70 greater than 60? How do u figure this out need help to explain how to get the answer..

    asked on October 11, 2010
  93. chemistry

    We have an aqueous solution that contains 47% (by mass) of a hypothetical solute Z. The formula weight of the solute Z is 209 g/mol. The density of the solution is observed to be 1.3 g/mL. What is the molarity of Z in this solution? Answer in units of

    asked on September 13, 2012
  94. ap chemistry

    Benzene is a hydrocarbon that is commonly used as a commercial solvent. However, it is carcinogenic; i.e., accumulations in the body can cause cancer. What is the vapor pressure of benzene at 29C? The normal boiling point of benzene is 80.0C and its

    asked on April 15, 2013
  95. chemistry

    An ion can be removed from an aqueous solu- tion by 1. the formation of a gas that escapes. 2. formation of a precipitate. 3. the formation of what is essentially a nonelectrolyte. 4. All of these

    asked on September 19, 2012
  96. chemisry

    An unknown amount of water is mixed with 350 mL of a 6 M solution of NaOH solution. A 75 mL sample of the resulting solution is titrated to neutrality with 52.5 mL of 6 M HCl. Calculate the concentration of the di- luted NaOH solution. Answer in units of M

    asked on September 19, 2012
  97. chemistry

    It takes 62 mL of 0.124 M KOH to neutralize 46.7 mL of H2SO4 solution. What is the concentration of the H2SO4 solution? Answer in units of moles/liter

    asked on September 13, 2012
  98. ART

    What are some careers in the visual arts?

    asked on May 21, 2010
  99. Probability -- Help?

    Sampling one at a time with replacement from a bag with 8 blue, 7 red, and 5 green. What is the probability of getting at least two red in 3 draws? The book says the probability is 0.2818 but doesn't explain why. Any help???? Unfortunately, the probability

    asked on December 1, 2006
  100. ap chemistry

    Use the Clausius-Clapeyron equation to cal- culate the temperature at which pure water would boil at a pressure of 434 torr. The heat of vaporization of water is 41276 J/mol at 100C. Answer in units of C

    asked on April 15, 2013

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