1. chemistry 101

    How many moles of oxygen are in 3.45 mol of diphosphorus pentoxide? options: 5.75 mol O 13.5 mol O 6.90 mol O 3.45 mol O 17.3 mol O

    asked by ABCD on July 8, 2011
  2. chemistry

    how many moles of oxygen atoms does 1.2x10^25 diphosphorus pentoxide molecules have? hwo many oxygen atoms are in 1.25 mol sulphur trioxide? i don't understand these

    asked by lisa on December 4, 2008
  3. Steve help please?!?!

    How many moles of oxygen are produced from the decomposition of 36.7 g of dinitrogen pentoxide? 2N2O5 4NO2 + O2 A. 3.19 mol B. 0.340 mol C. 0.170 mol D. 5.44 mol Hi Steve, I posted this question the other day but really don't know how to answer it. Can you

    asked by Jessie on August 19, 2016
  4. chemistry

    How many moles of nitric acid are produced starting from 5.00 moles of NO2(g) and 2.00 moles of water? Question 29 options: 4.00 mol 1.67 mol 7.50 mol 3.33 mol 10.0 mol

    asked by beverly on November 5, 2015
  5. Science

    Which conversion factor should be used to solve the following problem? How many moles of water (H2O) would be produced from the reaction of 3.25 moles of hydrochloric acid (HCl) reacting with excess calcium hydroxide Ca(OH)2? Ca(OH)2 +2HCl --> CaCl2 + 2H2O

    asked by Help on February 26, 2020
  6. chemistry

    How many moles of carbon monoxide gas are produced from the reaction of 5.00 moles of SnO2(s) with 9.00 moles of carbon according to the equation below? SnO2(s) + 2C(s) → Sn(s) + 2CO(g) Question 28 options: 4.50 mol 9.00 mol 18.0 mol 5.00 mol 7.50 mol

    asked by beverly on November 5, 2015
  7. chemistry

    How many moles of carbon monoxide gas are produced from the reaction of 5.00 moles of SnO2(s) with 9.00 moles of carbon according to the equation below? SnO2(s) + 2C(s) → Sn(s) + 2CO(g) Question 28 options: 4.50 mol 9.00 mol 18.0 mol 5.00 mol 7.50 mol

    asked by beverly on November 5, 2015
  8. Chemistry

    How many moles of P4O10 are produced when we react 8 moles of phosphorous with oxygen? I know the answer is: 4 mol P produces 1 mol P4O10 8 mol P produces 2 mol P4O10. Or, 1 mol P4O10 x (8 mol P / 4 mol P) = 2 mol P4O10. but, what is the balanced equation?

    asked by Timofey on May 3, 2013
  9. AP Chemistry Help!!

    How many moles of P4O10 are produced when we react 8 moles of phosphorous with oxygen? I know the answer is: 4 mol P produces 1 mol P4O10 8 mol P produces 2 mol P4O10. Or, 1 mol P4O10 x (8 mol P / 4 mol P) = 2 mol P4O10. but, what is the balanced equation?

    asked by Timofey on May 3, 2013
  10. ap chemistry

    Carbon monoxide reacts with oxygen to form carbon dioxide by the following reaction: 2CO + O2 yields 2CO2 Delta H for this reaction is -135.28 kcal. If 811.7 kcal is released, how many moles of CO must have reacted? 1). 270.5 mol 2). 40.5 mol 3). 12.0 mol

    asked by bob on October 18, 2012
  11. AP Chemistry

    Carbon monoxide reacts with oxygen to form carbon dioxide by the following reaction: 2CO(g) + O2(g) --> 2CO2(g) change in H for this reaction is −135.28 kcal. If 811.7 kcal is released, how many moles of CO must have reacted? 1. 16.3 mol 2. 40.5 mol 3.

    asked by Anonymous on September 29, 2013
  12. Chemistry

    With the knowledge that the formula of Diphosphorus pentoxide is P205, and its anion is P3-02-, what would be its cation? Would the cation be P5+ or something? Give an answer to what you think is the cation of diphosphorus pentoxide and why.

    asked by Last Name on December 20, 2019
  13. chemistry

    Calculate the number of moles in 75.0 g of oxygen gas. A. 2.34 mol O2 B. 4.69 mol O2 C. 750 mol O2 D. 12.5 × 1023 mol O2 B

    asked by Cathy on November 11, 2012
  14. Chemistry

    How many moles of oxygen gas (O2) are in a 2.50 L container at standard temperature and pressure? 2.24 x 10^1 mol O2 1.12 x 10^–1 mol O2 2.50 x 10^0 mol O2 5.60 x 10^1 mol O2

    asked by Quinn on December 11, 2018
  15. chemistry

    1.0 mol of nitrogen oxide NO and 1.0 mol of oxygen were mixed in a container and heated to 450 oC. At equilibrium the number of moles of oxygen was found to be 0.70 mol. The total pressure in the vessel was 4.0 atm. Calculate the value of Kp for the

    asked by jemy on July 6, 2010
  16. CHEMISTRY

    1.0 mol of nitrogen oxide NO and 1.0 mol of oxygen were mixed in a container and heated to 450 oC. At equilibrium the number of moles of oxygen was found to be 0.70 mol. The total pressure in the vessel was 4.0 atm. Calculate the value of Kp for the

    asked by jemy on July 8, 2010
  17. Stoichiometry

    Balance. Ammonia + oxygen yields Nitrogen + water. Then, given the moles of reactant or product below, determine the corresponding amount in moles of each of the other reactants and products. a)4 mol Ammonia b)4 mol of Nitrogen c)4.5 mol oxygen

    asked by Sandy on December 5, 2007
  18. AP Chemistry

    The equilibrium constant for thermal dissociation of F2 F2(g)2F(g) is 0.300. If initially 1.00 mol F2 is placed in a 1.00 L container, which of the following is the correct number of moles of F2 that have dissociated at equilibrium? 1. 0.130 mol 2. 0.418

    asked by Gabriella on November 26, 2013
  19. Chemistry help

    Hello. Can I get someone to help me set up these problems? 1.) How many moles of N are there in 2.6 moles of NHO3? 2.) How many moles of C2H6 (g) are consumed when 4.4 mol CO2 (g) are produced? 3) How many milliliters of 0.80 M CuSO4 must be diluted to

    asked by Nazr on February 25, 2007
  20. Chemistry

    1)The chemical formula for aspirin is C9H8O4. What is the mass of 0.40 mol of aspirin? How would I find this? 2)The gram molecular mass of oxygen is 16.0 g right? 3)How would I find the mass, in grams, of 3.01 x 10^23 molecules of water? 1. Add the atomic

    asked by anonymous on July 31, 2007
  21. Science chemistry

    Determine the number of moles of oxygen in 1 mol of dinitrogen tetraoxide N2O4= N 2×14.01g/mol= 28.02g/mol O 4×16.00g/mol= 64.00g/mol N2O4= 92.02g/mol I can't get the right formula to solve the rest. Please help and thank you

    asked by Farhin on November 30, 2016
  22. chemistry

    3NO2(g) + H2O(l) → 2HNO3(l) + NO(g) How many moles of the excess reactant remain if 2.00 moles of H2O(l) and 5.00 moles of NO2(g) are used? Question 30 options: 1.67 mol H2O(l) 3.00 mol NO2(g) 4.00 mol NO2(g) 1.00 mol NO2(g) 0.33 mol H2O(l)

    asked by beverly on November 5, 2015
  23. Intro to chem

    What is the volume of 19.7g of oxygen at STP? Heres what i got but did not get the same answer..pls tell me where i am wrong! (grams to moles) 19.7g x 1 mol/ 16.00 = 1.23 mol Oxygen (Pv=nRT) looking for V 1.23 mol x 0.0821 x 273K / 1.00 atm = 27.57 CORRECT

    asked by pooja on April 14, 2011
  24. chemistry

    Give the mass in grams of diphosphorus pentoxide that contains 2.0 x 10^(24) oxygen atoms.

    asked by miriam on October 4, 2011
  25. Chemistry

    How many moles of sodium chloride must be added to an aqueous solution that contains 2.0 moles of silver nitrate in order to precipitate 0.50 moles of silver chloride? A) 0.25 mol B) 0.50 mol C) 1.0 mol D) 2.0 mol E) 1.5 mol The answer is B. I have no idea

    asked by Jill on March 22, 2009
  26. chemistry

    how many moles of oxygen are there in 50.0 grams of KClO3? Given: 50.0 g KClO3 Find: ? mol O K= 39.10 g/mol Cl= 35.45 g/mol O= (16.00)x3= 48.00 g/mol Total: 122.55 g/mol KClO3 50.0 g KClO3 x 1 mol KClO3/122.55 g/mol KClO3=0.408 mol KClO3 0.408 mol KClO3 x

    asked by J.R. on September 28, 2014
  27. ap chem

    calculate the lattice enthalpy of potassium fluoride from the following data: enthalpy of formation of K(g): +89 kJ · mol−1 first ionization energy of K(g): +418 kJ · mol−1 enthalpy of formation of F(g): +79 kJ · mol−1 electron affinity of F(g):

    asked by alexandra on July 13, 2010
  28. Chemistry

    Two reactions that occur in the production of iron (Fe) are 2 C + O2 → 2 CO followed by Fe2O3 + 3 CO → 2 Fe + 3 CO2 . Note that the carbon monoxide (CO) formed in the first reaction is then used in the second reaction. According to these equations, how

    asked by Esmeralda on January 21, 2020
  29. help with stochiometry

    can someone help me out with this one? balanced equation is: 2H2 + O2 > 2H2O My questions are: How many molecules of water are produced from 2.0 * 10 ^23 molecules of oxygen? How many moles of water are produced from 22.5 moles of oxygen? OK. First, it

    asked by iearn on January 24, 2007
  30. Chemistry- DrBob222

    Please check. Oxygen (O2) is about 20% of our air, with about 80% nitrogen and a bunch of minor components. In Colorado Springs, where I grew up, the elevation is ~ 6500 feet and atmospheric pressure is only around 9 psi (vs. 14.7 psi at sea level). Under

    asked by Student on March 11, 2016
  31. Chemistry

    3O2 -> 2O3 When 4.26 x 10^16 mol of oxygen (O) are converted into ozone, how many mol of the pollutant (O3) are formed? A. 2.84 x 10^16 mol O2 B. 6.39 x 10^6 mol O2 C. 2.84 x 10^1 mol O2 D. 2.84 x 10^16 mol O2 D?

    asked by Michael on January 26, 2018
  32. Chemistry

    1. Oxygen (O2) is about 20% of our air, with about 80% nitrogen and a bunch of minor components. In Colorado Springs, where I grew up, the elevation is ~ 6500 feet and atmospheric pressure is only around 9 psi (vs. 14.7 psi at sea level). Under those

    asked by Student on March 10, 2016
  33. chemistry

    3NO2(g) + H2O(l) → 2HNO3(l) + NO(g) How many moles of NO2(g) are required to react with 1.00 mole of water to produce 3.00 moles of nitric acid? Question 24 options: 6.00 mol 1.50 mol 2.00 mol Not enough water is available to produce 3.00 moles of nitric

    asked by beverly on November 5, 2015
  34. Chemistry

    Oxygen (O2) is about 20% of our air, with about 80% nitrogen and a bunch of minor components. In Colorado Springs, where I grew up, the elevation is ~ 6500 feet and atmospheric pressure is only around 9 psi (vs. 14.7 psi at sea level). Under those

    asked by Student on March 11, 2016
  35. Science

    Which conversion factor should be used to solve the following problem? How many moles of water (H2O) would be produced from the reaction of 3.25 moles of hydrochloric acid (HCl) reacting with excess calcium hydroxide Ca(OH)2? Ca(OH)2 +2HCl --> CaCl2 + 2H2O

    asked by Help on February 26, 2020
  36. Chemistry

    Hello. Can I get someone to help me set up these problems? 1.) How many moles of N are there in 2.6 moles of NHO3? 2.) How many moles of C2H6 (g) are consumed when 4.4 mol CO2 (g) are produced? 3) How many milliliters of 0.80 M CuSO4 must be diluted to

    asked by Nathan on February 25, 2007
  37. Chemistry

    given the balanced equation representing a reaction: 4NH3+5O2-->4NO+6H2O what is the minimum number of moles of O2 that are needed to completely react with 16 moles of NH3? (1)16 mol (2)20.mol (3)64 mol (4)80. mol i think its 2 but im not sure.

    asked by Destinee on January 2, 2011
  38. Chemistry

    Aluminum reacts with oxygen gas to produce aluminum oxide. How many moles of aluminum oxide would you expect to produce if you reacted 14.5 moles of oxygen gas with excess aluminum? 4Al +3O2 --> 2Al2O3 14.5 mol O2 x 4 mol Al / 3 mol O2 = 19.3 moles

    asked by Sydney on May 29, 2017
  39. chemistry-please check my work

    Determine the mass of carbon monoxide that is produced when 45.6 g of methane CH4 react with 73.2 g of oxygen gas, O2. The products are CO and H2O. Please check my work: CH4 + 3O2 ---> 2CO + 2H20 nCH4=2.84 mol nO2=4.58 mol Limiting Reactant: 1 mol CH4/2.84

    asked by Sarah H on May 23, 2008
  40. Chemistry

    How much water would be formed if 3.00 mol NH3 reacted with excess oxygen gas in the following equation? Given the reaction 4NH3+ 5O2 --> 4NO + 6H2O A) 2.00 mol B) 3.00 mol C) 4.50 mol D) 6.00 mol E) None of these

    asked by Petey on April 9, 2016
  41. chemistry

    The pH of a solution prepared by mixing 45 mL of 0.183 M KOH and 65 mL of 0.145 M HCl is i solved it but my answer is wrong. the right one is 1.97. am i missing a step? moles of HCl left over = (moles of HCl) – ( moles of KOH) moles of HCl left over =

    asked by ben on November 23, 2010
  42. Chemistry

    Oxygen can be produced in the laboratory by the reaction 2 KClO3(s) → 2 KCl(s) + 3 O2(g) . How much potassium chlorate is needed to produce 2.75 L of oxygen, collected over water at 37◦C and 94.9 kPa? The vapor pressure of water at 37◦C is 6.28 kPa.

    asked by Caitlin on November 20, 2012
  43. Chemistry

    Given the equation N2(g)+3H2(g)→2NH3(g), what is the total number of moles of NH3 produced when 10 mol of H2 reacts completely with N2? 1. 2.0 mol 2. 3.0 mol 3. 6.7 mol 4. 15 mol

    asked by Hopeless person on December 4, 2014
  44. chem

    How many moles of potassium iodide, KI, are required to precipitate all of the lead(II) ion from 25.0 mL of a 1.6 M Pb(NO3)2 solution? A. 0.020 mol B. 0.040 mol C. 0.080 mol D. 0.64 mol E. 64 mol

    asked by victoria on April 28, 2013
  45. Chemistry

    According to the reaction 2Al+3H2SO4→3H2+Al2(SO4)3, the total number of moles of H2SO4 needed to react completely with 5.0 mol of AL is 1. 2.5 mol 2. 5.0 mol 3. 7.5 mol 4. 9.0 mol

    asked by Hopeless person on December 4, 2014
  46. Chemistry

    A metal forms an oxide with the general formula MO2 with a deltaHf=-580.7 kJ/mol. Using the Born-Harber Cycle and the following information, determine lattice energy for the compound. Metal Information: deltaHsubl=302 kJ/mol, IE1=708.6 kJ/mol, IE2=1412

    asked by Ceamus Angelina on April 17, 2018
  47. Chem for final, please help!

    How many moles of H+(aq) ions are present in 1.25 L of 0.75M Nitric Acid? A. 0.60 mol B. 0.75 mol C. 0.94 mol D. 1.7 mol E. 1.9 mol Please show me how to work this!

    asked by lavonne on December 7, 2010
  48. Chemistry

    Calculate how many moles of Na2S2O3 must be added to dissolve 0.020 mol AgBr in 1.0 L of water at 25°C (assume constant volume). AgBr(s) ↔ Ag+(aq) + Br−(aq) Ksp = 3.3 x 10^−13 Ag+(aq) + 2S2O32−(aq) ↔ [Ag(S2O3)2]3−(aq) Kf = 2.0 x 10^13 (1)

    asked by bill on February 26, 2017
  49. Chemistry

    Consider the reaction below. 2C6H14 + 19O2 mc032-1.jpg 12CO2 + 14H2O How many moles of hexane (C6H14) must burn to form 18.4 mol of carbon dioxide? 1.53 mol 3.07 mol 110. mol 175. mol

    asked by Haylie S on May 14, 2016
  50. chem

    A 2.241 g sample of nickel reacts with oxygen to form 2.852 g of the metal oxide. Calculate the empirical formula of the oxide. 1)NiO Give the number of moles of each element to support you answer. moles of Ni 2) 1.339 mol moles of O 3)1.34 mol I know #1

    asked by hannah on November 12, 2010
  51. Chemistry e

    The rusting of iron is represented by the equation 4Fe +3O2 --> 2Fe2O3. If you have a 1.50-mol sample of iron, how many moles of Fe2O3 will there be after the iron has rusted completely? a. 0.50 mol b. 0.75 mol c. 1.0 mol d. 1.50 mol e. 2.0 mol --> I got

    asked by Kaye on January 18, 2011
  52. ap chemistry

    Carbon monoxide reacts with oxygen to form carbon dioxide by the following reaction: 2CO2 + O2 yields 2CO2 Delta H for this reaction is -566 kJ/mol run. What is the delta H for CO? 1). +270 kJ/mol 2). -110 kJ/mol 3). +65 kJ/mol 4). -405 kJ/mol 5). -65

    asked by bridget on October 18, 2012
  53. Chemistry

    srry I placed the question in the wrong spot. The equation is 2NH3 N2 + 3H2 1 mole of NH3 injected intoa 1L flask 0.3 moles of H2 was found the concentration of N2 at equlibrium is 0.1M how do I find the concentration of NH3 at equlibrium? (N2) = 0.1 (H2)

    asked by Bethany on May 8, 2007
  54. College Chemistry

    In a reaction vessel, the following reaction was carried out using 0.250 mol of NH3(l) and 0.100 mol of N2(g). 4NH3(l) + N2(g) ¡ú 3N2H4(l) Which of the following represents the composition in moles in the vessel when the reaction reaches completion?

    asked by Lisa on March 26, 2012
  55. chemistry

    2Na3PO4 + 3CaCl2 ----> Ca3 (PO4)2 + 6NaCl how many moles of CaCl2 remain if .10 mol Na3PO4 and .40 mol CaCl2 are used? When amounts of both materials are listed one must worry about which is the limiting reagentalthough the problem seems to suggest that

    asked by Hawk on June 21, 2006
  56. chemistry

    I don't know how to do this How many moles of water can be made from 4 moles of oxygen gas and 16 moles of hydrogen gas? What is the limiting reagent? Write the balanced equation. 2H2 + O2 ==> 2H2O 2 mols H2 + 1 mol O2 will produce 2 mol H2O. So 16 mols H2

    asked by Tabby on January 15, 2007
  57. Chemistry

    Fluorine reacts with oxygen to yield oxygen difluoride. 2 F2(g) + O2(g) 2 OF2(g)K = 2.00x 10^2 (a) Calculate [O2] at equilibrium when [OF2] = 0.25 mol/L and [F2] = 0.0208 mol/L. mol/L (b) Calculate [OF2] at equilibrium when [F2] = 0.088 mol/L and [O2] =

    asked by Marie on December 9, 2012
  58. chemistry

    Given a percent yield of 45.0% for the reaction: H2 + Cl2 → 2 HCl(g) How many moles of HCl gas are produced if 15.5 L of Cl2 at STP and excess H2 are reacted? 1. 0.769 mol 2. 0.346 mol 3. 0.622 mol 4. 3.08 mol 5. 1.38 mol 6. 0.156 mol

    asked by Anonymous on May 1, 2015
  59. Chemistry

    "Given that the bond enthalpy of the carbon-oxygen bonds in carbon monoxide and carbon dioxide are 1073 kJ/mol and 743 kJ/mol respectively, and that of the bond in the oxygen molecule is 496 kJ/mol, calculate the enthalpy change for the combustion of 1

    asked by Stuck on April 8, 2010
  60. chemistry

    How many moles of water are produced from the combustion of 3.5 mol of hydrogen and 5.2 mol of oxygen?

    asked by Sam on April 5, 2010
  61. chemistry

    how many moles of water are produced from the combustion of 3.5 mol of hydrogen and 5.2 mol of oxygen

    asked by juanita on April 6, 2010
  62. chemistry

    How many moles of water are produced from the combustion of 3.5 mol of hydrogen and 5.2 mol of oxygen?

    asked by Sam on April 5, 2010
  63. Chemistry

    How many liters of oxygen a@STP will produce 195 grams of diphosphorus pentoxide when reacted with sufficient phosphorus?- exact question. Could someone plz help I am confused and if you could help me put it in dimensional analysis.

    asked by Kristen on March 8, 2015
  64. Chemistry Check Please! ?Fixed

    A solution is prepared by dissolving 3.44 g of sucrose, C12H22O11, in 118 g of water. a) What is the molality of the resulting solution? b) What is the mole fraction of water in this solution? B) moles of h2o=118g/18(g/mol)=6.548 mol moles of c12h22O11=

    asked by Kate on January 17, 2014
  65. AP Chem

    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 201 kJ/mol. The strength of the N Br bond is 1. 4 kJ/mol 2. 465

    asked by Beth on November 7, 2010
  66. chemistry

    If 15.0 grams of C3H6, 10.0 grams of oxygen, and 5.00 grams of NH3 are reacted, what mass of acrylonitrile can be produced assuming 100% yield, what mass of the excess reactants remain? 15g C3H6 (1 mol / 42.08 g) = .35 mol C3H6 .36 mol C3H6 ( 2 mol C3H3N /

    asked by loulou on February 5, 2015
  67. Chemistry

    A 2.612 g sample of a copper oxide, when heated in a stream of H2 gas, yields .592 g H20. What is the formula of the copper oxide? Again, I need help with this problem. Answer = CuO Ok nvm.. i got it. Set up the reaction as best we can surmise at the

    asked by Laura on August 25, 2005
  68. chemistry

    Ibuprofen, the active ingredient in advil, is made up of carbon, hydrogen, and oxygen atoms. When a sample of ibuprofen, weighing 5.000 g, burns in oxygen, 13.86 g of CO2 and 3.926 g of water are obtained. What is the simplest formula of ibuprofen? My

    asked by Chris on October 17, 2006
  69. Chem

    A -> 3C The molar mass of A is 10.0g/mol If 2.0 grams of A reacts, how many moles of C will be produced? A -------------------> 3C m.mass= 10.0g/mol mass = 2.0 g moles = 2.0 g/10.0 g/mol =0.2 mol moles of c = 3 x 0.2 = 0.6 mol Did I do this correctly?

    asked by Lena on July 6, 2009
  70. Chemistry - Bob Pursley

    Posted by Sarah H on Friday, May 23, 2008 at 8:10pm. Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS = 7O2 --> 2Fe2O3 + 2SO2 Calculate the % yield. My

    asked by Sarah H on May 24, 2008
  71. chemistry please help

    Calculate the lattice energy of potassium oxide from the following data: Enthalpy of sublimation of potassium: +89.24 kJ/mol Bond energy of oxygen: +498 kJ/mol First ionization energy of potassium: +419 kJ/mol 1st electron affinity of oxygen: -141 kJ/mol

    asked by Joanie on April 17, 2011
  72. CHEM please!!! help

    Calculate the lattice energy of potassium oxide from the following data: Enthalpy of sublimation of potassium: +89.24 kJ/mol Bond energy of oxygen: +498 kJ/mol First ionization energy of potassium: +419 kJ/mol 1st electron affinity of oxygen: -141 kJ/mol

    asked by Joanie on April 19, 2011
  73. physics

    A 2.10 mol sample of oxygen gas is confined to a 5.10 L vessel at a pressure of 7.99 atm. Find the average translational kinetic energy of an oxygen molecule under these conditions in (j/mol) When i was working this out i tried using pv=nrt to find the

    asked by reeta on October 21, 2008
  74. REETA

    A 2.10 mol sample of oxygen gas is confined to a 5.10 L vessel at a pressure of 7.99 atm. Find the average translational kinetic energy of an oxygen molecule under these conditions in (j/mol) When i was working this out i tried using pv=nrt to find the

    asked by CHEMISTRY on October 21, 2008
  75. chem

    For the following reaction, 31.1 grams of diphosphorus pentoxide are allowed to react with with 10.2 grams of water. diphosphorus pentoxide (s) + water (l)>>> phosphoric acid (aq) What is the maximum amount of phosphoric acid that can be formed in grams?

    asked by moose on May 15, 2011
  76. Chemistry Check Please!

    A solution is prepared by dissolving 3.44 g of sucrose, C12H22O11, in 118 g of water. a) What is the molality of the resulting solution? b) What is the mole fraction of water in this solution? B) moles of h2o=118g/18(g/mol)=6.5556 mol moles of c12h22O11=

    asked by Kate on January 16, 2014
  77. Chemistry (stoichiometry

    (This homework question has been removed due to a copyright claim submitted by K12, Inc.) _----------_ [" okay this is what i got and im not sure if i did it right nor do i know if i answered everything the questions wanted so could you help me out

    asked by Samantha on December 17, 2010
  78. chemistry

    How many moles of magnesium chloride are formed when 55 mL of 0.70 M HCl is added to 42 mL of 1.204 g Mg(OH)2? Mg(OH)2(s) + 2HCl(aq) MgCl2(aq) + 2H2O(l) A. 0.019 mol B. 0.012 mol C. 0.021 mol D. 0.039 mol

    asked by Morgan on October 13, 2014
  79. Chemistry ?

    How many moles are contained in a 4.67-L sample of gas at 30°C and 199 kPa? A. 1.7 mol B. 11.8 mol C. 0.37 mol D. 3.7 mol I guessed D, but I'm not sure.

    asked by Kaylee on August 15, 2013
  80. Chemistry

    Determine the number of moles of air present in 1.35 L at 100. kPa and 23.0°C (R = 8.317 liter•kPa/mol•K a) 0.0548 mol b) 205 mol c) the number of moles is held constant d) 0.706 mol Please help! I can't get this!!

    asked by Veronica on February 25, 2020
  81. Chemistry

    I'm not really sure how to do this. I've tried many ways and I can't get the right answer of 0.0569 mol/L H3PO4 100.0 mL of a solution containing 2.55g of potassium hydroxide is mixed with 100.0 mL of a 1.50 mol/L phosphoric acid solution. Will the

    asked by Sarah on December 17, 2017
  82. chemistry

    A 79.9-L sample of a gaseous hydrocarbon, measured at 1.00 atm pressure and 25.0°C, is burned in excess oxygen, liberating 4.24 × 10^3 kJ of heat at constant pressure. What is the identity of the hydrocarbon? (R = 0.0821 L · atm/(K · mol)) Substance

    asked by chemistry on March 30, 2011
  83. chemistry

    how many molecules are in 5.5 moles of oxygen gas? How many atoms are in this quantity of gas? I used dimensional analysis and did: 5.5 mol. of oxygen x 6.02x10^23 molecules/1 mol of oxygen I got 3.3x^24 molecules of oxygen How do I find the # of atoms? I

    asked by ally on March 11, 2015
  84. Chemistry

    How many moles of aluminum is needed to form 3.4 moles of aluminum oxide? 3.4 mol Al2O3 x (2 mol Al/1 mol Al2O3) = ?? mol Al. Note how the units we don't want cancel but the unit we want to keep remains.

    asked by Jacob on February 1, 2007
  85. chemistry

    If my original sample contained 7.1 grams of potassium chlorate. How many moles of oxygen gas would I expect to have evolved? Hint: Convert grams to moles of potassium chlorate, then use the mole ratio in the balanced equation. Balance this equation KClO3

    asked by bekah on April 1, 2014
  86. Chemistry

    There is a question on my assignment that's asks how many moles of atoms are in x mol of CO2 (and a few others). Let X represent 5x10^-4. How do I do this? Teacher didn't really teach us this. I know in one mol of CO2 there is 2 moles of oxygen atoms, so

    asked by Logan on October 13, 2015
  87. Chemistry- Dr.Bob

    1. Oxygen (O2) is about 20% of our air, with about 80% nitrogen and a bunch of minor components. In Colorado Springs, where I grew up, the elevation is ~ 6500 feet and atmospheric pressure is only around 12 psi (vs. 14.7 psi at sea level). Under those

    asked by Sanaya on January 20, 2016
  88. Chem

    Calculate the work (in kJ) when 1.80 moles of methane react with excess oxygen at 389 K: CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) I got 11661.26 Calculate the change in entropy (in J/K) when 70.1 g of nitrogen gas is heated at a constant pressure of 1.50 atm

    asked by Anonymous on March 27, 2013
  89. chemistry

    Which of the following mixtures will be a buffer when dissolved in a liter of water? a. 0.1 mol Ca(OH)2 and 0.3 mol HI b. 0.3 mol NaCl and 0.3 mol HCl c. 0.4 mol NH3 and 0.4 mol HCl d. 0.2 mol HBr and 0.1 mol NaOH e. 0.2 mol H3PO4 and 0.1 mol NaOH i think

    asked by George2 on May 21, 2010
  90. Chemistry

    Determine the number of moles of N2 that are required to produce 12 mol of NH3 using the equation, N2 + 3H2 --> 2NH3. 12 mol NH3 x 1 mol N2/2 mol NH3 = 6 moles of N2.

    asked by Beth on November 29, 2015
  91. Physical Science

    When iron metal reacts with oxygen, the reaction can form Fe203. The balanced chemical equation I think is right is 4 Fe + 302----2Fe203. So I have 4 moles of iron + 3 moles of oxygen creates 2 moles of iron oxide. I need to find the number of moles of

    asked by Steve on November 11, 2016
  92. science

    I need some help with my science homework. Well it is not really my homework it is my study guide but the actual test is the same as the study guide almost. They just switch around the words and stuff around to mess with your mind. These were just the only

    asked by JAKE on February 25, 2008
  93. science

    I need some help with my science homework. Well it is not really my homework it is my study guide but the actual test is the same as the study guide almost. They just switch around the words and stuff around to mess with your mind. These were just the only

    asked by JAKE on February 25, 2008
  94. chemistry

    Changing 1 mol of Mg(s) and 1/2 mol of O2 (g) to gaseous atoms requires a total of approximately 150kJ of energy. The first and second ionization energies of Mg are 737kJ/mol and 1450kJ/mol respectively. The first and second electron affinities of Oxygen

    asked by Insolvable question on November 22, 2016
  95. chem.(sci)

    ___NH3+___O2->N2+H2O (this is not balanced) how many moles of oxygen react with 0.23 moles of NH3? HOW many moles moles of N2 will be produced when reacted with 5 mol of O2?

    asked by tyneisha on January 24, 2013
  96. chemistry

    How many moles are in 4.81 x 1024 atoms Na? A. 0.799 mol Na B. 7.99 mol Na C. 481 mol Na D. 7.99 x 10-1 mol Na B

    asked by Drew on November 10, 2012
  97. chemistry

    For these problem, I know how to solve it, but I have some issues with the formula. I know that, I need to write down the formula first, and then I need to balance the equation, then I can solve it. So, can anyone please check my formula? You don't have to

    asked by hh on September 10, 2009
  98. Chemistry

    Fluorine reacts with oxygen to yield oxygen difluoride. 2 F2(g) + O2(g) 2 OF2(g) What is the value of K if the following concentrations are found at equilibrium: [O2] = 0.200 mol/L, [F2] = 0.0100 mol/L, and [OF2] = 0.0633 mol/L

    asked by Marie on December 9, 2012
  99. Chemistry

    Fluorine reacts with oxygen to yield oxygen difluoride. 2 F2(g) + O2(g) 2 OF2(g) What is the value of K if the following concentrations are found at equilibrium: [O2]= 0.200 mol/L, [F2]=0.0100 mol/L, and [OF2]=0.0633 mol/L

    asked by Sally on March 1, 2012
  100. chemistry

    Consider the reaction: N2(g) + 3 H2(g) --> 2 NH3(g). At a particular time, the nitrogen is being consumed at a rate of 0.60 moles/sec. At this same time, what is the rate at which ammonia is being formed? a. 3.0 mol/s b. 0.12 mol/s c. 0.30 mol/s d. 2.0

    asked by Jessie on January 10, 2017