1. Chemistry

    For which of the following aqueous salts will electrolysis produce hydrogen gas and oxygen gas? Answered the hint in Mastering Chem & looked over the book and I still have no idea. Check all that apply: A) NiF_2(aq) B) NaF(aq) C) NiI_2(aq) D) NaI(aq) E)

    asked by Mike on November 8, 2012
  2. Chemistry

    N2(g) + O2(g) → N2O5(g) What volume of oxygen gas reacts to yield 750.0 cm3 of N2O5? The reaction conditions are 350°C and 2.50 atm pressure. I balanced the equation 2N2+2O2 = 2N2O5 BUT I AM NOT GETTING THE CORRECT ANSWER, WHAT AM I DOING WRONG?

    asked by Harry on February 2, 2014
  3. Statistics

    In a prior sample of U.S. adults, the Center for Disease Control (CDC), found that 10% of the people in this sample had pinworm but the margin of error for the population estimate was too large. They want an estimate that is in error by no more than 1.5

    asked by Sara on March 11, 2016
  4. Chemistry

    You have found that 14.37mL of 0.162M sulfuric acid reacts with exactly 20.00mL of barium hydroxide solution of unknown concentration. What is the molarity of the barium hydroxide solution? Round your answer to 3 decimal places and include units. I know

    asked by Micah on May 31, 2017
  5. Chemistry

    (1)Aluminum reacts with oxygen to produce aluminum oxide according to the following reaction: 4Al(s) + 3O2(g) → 2Al2O3(s) Calculate the moles of Al2O3 produced when the reaction is performed with 31.06 g of each reactant. (2)Nitrogen dioxide reacts with

    asked by WCU cats on March 6, 2013
  6. planning

    In three to five sentences, answer the following questions. 1.Where do I picture myself five years from now? What am I doing? Where am I going? 2.How do the course choices (both elective and required) that I make today lead to the fulfilment of this dream?

    asked by Anonymous on August 30, 2010
  7. Chemistry

    Consider the following balanced equation: 2N2H4(g)+N2O4(g)→3N2(g)+4H2O(g) Complete the following table showing the appropriate number of moles of reactants and products. If the number of moles of a reactant is provided, fill in the required amount of the

    asked by Carter on March 5, 2014
  8. chem(REALLY NEED HELP )

    calculate the total mass of carbon dioxide gas produced when you burn 1000ml of gasoline Density of heptane = 0.684g/ml density of octane =0.703g/ml a) Calculate the mass of carbon dioxide produced from combustion of heptane C7H16 + O2 ------- CO2 + H2O

    asked by christie on December 2, 2014
  9. language arts

    what are simple subjects ang simple predicates help me work due monday The simple subject is the one word that is doing the action. The simple subject in these examples are CAPITALIZED. LASSIE came home. ONE of my brothers plays football. Have YOU ever

    asked by autumn on August 13, 2005
  10. Finance

    I have a number of questions for a finance assignment that is meant as a review for our final. However my final is being written earlier than the rest of the class so the answers aren't up yet. I was hoping someone could answer two or three of the

    asked by Brian on April 19, 2010
  11. Chemistry

    An ideal monatomic gas initially at 298 K and 1 atm pressure is expanded from a volume of 1 liter to 2 liters. Consider separately isobaric, isothermal and adiabatic expansions to accomplish this. In each case, calculate the following: a) The final

    asked by Marcus on January 30, 2011
  12. chemistry12_2016-1

    In one process, 4.0 grams of sulphur was brunt in 48.0 decimeter cube of oxygen measured at RTP. (A) What is the limiting reactant in this reaction? (B) Calculate the volume of sulphur dioxide formed at RTP.

    asked by Anonymous666_4 on March 27, 2016
  13. Chemistry

    A 5.00 g mixture of methane (CH4) and ethane (C2H6) is combusted in oxygen gas to produce carbon dioxide and water. If 14.09 g of CO2 is produced, how many grams of methane was in the original 5.00 g mixture ?

    asked by Ana on January 21, 2015
  14. chemistry

    I do not understand how to right a balanced equation for the combustion of cellulose in oxygen to produce carbon dioxide and water vapor. I know that cellulose is C6H10O5 but I don't understand how to balance. Thanking you in advance for your help.

    asked by linda on March 27, 2014
  15. 5th grade math

    If you have 78.1% nitrogen,20.9% oxygen,.9% Argon and small amounts of other gases Which graph type would best display the data? Line graph bar graph pie graph stem and leaf plot

    asked by jill on December 2, 2010
  16. Science

    Hello van some one show me how to draw a dot and cross diagramm for 1 lithium atom and 1 fluorine atom(Lif) and also a diagram for 1 magnesium atom and 1 oxygen atom (MgO) Thankyou Paul.

    asked by Paul on March 28, 2011
  17. Physical Science

    An iron fence is left unpainted, and it reacts with the oxygen in the air, forming rust. The formation of rust is an oxidation-reduction reaction, but it is also an example of a(n) _________ reaction My answer is synthesis

    asked by Steve on October 13, 2016
  18. Chemistry

    Which of the following statements is true regarding a covalent bond in CO? Valence electrons are transferred to the oxygen atom. The bond length is less than the sum of the two atomic radii. Bonding electrons are stationary in the CO molecule. all of the

    asked by Lue on April 17, 2014
  19. Chemistry

    Gasohol contains ethanol (C2H4OH)(l), which when burned reacts with oxygen to produce CO2(g) and H2O(g). How much heat is released when 12.5g of ethanol burns? C2H5OH(l) + 3 O2(g) --> 2 CO2(g) + 3H2O(l) Delta H = -1368kJ

    asked by Keith on May 19, 2010
  20. Chemistry

    In an experiment, a mixture of two gases occupies a volume of 3.00 L at a temperature of 22.5 degree centigrade. The mixture contains 14.0 g of water, 11.5 g of oxygen, and 37.3 g of nitrogen. Calculate the total pressure and the partial pressure of each

    asked by Aaqib Zaman on November 15, 2014
  21. chemistry

    Fumaric acid, which occurs in many plants, contains, by mass, 41.4% carbon, 3.47% hydrogen, and 55.1% oxygen. A 0.050-mol sample of this compound weighs 5.80 g. The molecular formula of this compound is can you show me the formula

    asked by Tierney on October 6, 2009
  22. chemistry

    An explosive whose chemical formula is C3H6N6O6 produces water, carbon dioxide, and nitrogen gas when detonated in oxygen. write the chemical equation for the detonation reaction of this explosive.

    asked by Maria on January 17, 2011
  23. Chemistry

    When a mixture of 10.0 g of acetylene and 10.0 g of oxygen is ignited, a complete combustion of the reactants takes place. What is the limiting reagent of this reaction? How many grams of each of the reactants and products are present at the end of the

    asked by Destiny on October 10, 2011
  24. chemistry

    8750 g of a compound which contains only carbon, hydrogen, and nitrogen were burned in oxygen to produce, 2.1930 g of N2O4 , and 2.2900 g of water. What is the empirical formula of the compound? (Hint: do carbon by difference)

    asked by joan on September 21, 2011
  25. Chemistry

    Sulfur can form a bond with any of the following elements: oxygen, chlorine, bromine, or phosphorus. Which of those elements when bonded with sulfur produces the greatest degree of ionic character? Explain your answer.

    asked by Jonah on November 5, 2018
  26. Chemistry ( I NEED HELP, PLEASE!!!, IM DESPERATE!)

    Sodium peroxide reacts vigorously with water to produce sodium hydroxide and oxygen. The unbalanced equation is Na2O2(s) + H2O(ℓ)→ NaOH(aq) + O2(g). What mass of O2 is produced when 81 g of Na2O2 react?

    asked by Farrell on March 11, 2015
  27. Chemistry ( I NEED HELP, PLEASE!!!!, IM DESPERATE)

    Sodium peroxide reacts vigorously with water to produce sodium hydroxide and oxygen. The unbalanced equation is Na2O2(s) + H2O(ℓ)→ NaOH(aq) + O2(g). What mass of O2 is produced when 81 g of Na2O2 react?

    asked by Farrell on March 11, 2015
  28. Chemistry I

    A scuba diver's tank contains 0.23 kg of O2 compressed into a volume of 3.5 L. (a) Calculate the gas pressure inside the tank at 11°C. ________atm (b) What volume would this oxygen occupy at 20°C and 0.92 atm? ________L what are the formulas for this

    asked by Elizabeth on May 17, 2009
  29. Chemistry

    Iron (II) ions can be precipitated from the following reaction: 4Fe(OH)+(aq) + 4OH-(aq) + O2(g) + 2H2O(l) --> 4Fe(OH)3(s) How many grams of oxygen gas will be needed to precipitate the iron contained in 125mL of 0.085M Fe(OH)+ solution?

    asked by Bekah on September 28, 2011
  30. Chemistry

    Explain why this reaction is not feasible:CH3CHO^-Na^+ + CH3C(CH3)2Cl=CH3CH2O(CH3)2OCH3. ;->Becos of ion charge of Oxygen and Na in the cpd reacting with non ionic cpd

    asked by Destiny on June 5, 2014
  31. Science

    If oxygen, Carbon dioxide, and xenon gases are heated at 500k with a probable particle speed of 1094 and an average particle speed of 1234, what id the mass of an atom or molcule for each?

    asked by Carolyn on July 20, 2012
  32. science

    Oxygen is prepared by heating KClO3. (i) What weight of O2 is obtained from 3.00 g KClO3? (ii) What is the volume of O2, measured at standard conditions? (iii) What volume does the O2 occupy if collected over water at 0.961 atm

    asked by reagan on October 7, 2018
  33. Chemistry

    It has been determined that the body can generate 5500 kJ of energy during one hour of strenuous exercise. Perspiration is the body's mechanism for eliminating this heat. How many liters of water would have to be evaporated through perspiration to rid the

    asked by Jamie lee on April 14, 2015
  34. Physics (please help!!!!)

    Blood pressure is usually reported in millimeters of mercury (mmHg) or the height of a column of mercury producing the same pressure value. Typical values for an adult human are 130/80; the first value is the systolic pressure, during the contraction of

    asked by Anonymous on April 16, 2011
  35. algebra

    Solution A is 25% acid and Solution B is 40% acid. How much of each is needed to make 60 liters of a solution that is 30% acid?

    asked by hanaa on April 13, 2008
  36. algebra

    Solution A is 25% acid and Solution B is 40% acid. How much of each is needed to make 60 liters of a solution that is 30% acid?

    asked by hanaa on April 13, 2008
  37. Chemistry

    Ok so reviewing my notes I also got 11,326.6 as the volume in ml. The density of water he wanted us to use was (0.9975) and I went from 1 gal of H2O = 3.785 liters = 3785 grams then multiplied by 3 giving me 11,355g H2O. The only other step I could come up

    asked by Holly on September 25, 2012
  38. science chemistry

    1000g of a 55%(mass percentage) nitric acid solution is to be diluted to 20%(mass percentage) nitric acid solution.how many liters of water should be added to the starting solution?

    asked by Muhammad on November 5, 2012
  39. chemistry

    for this question How many liters of H2 gas at STP are produced when Zn reacts with 125 mL of 6.00 M HCl? my book answers it this way: 0.125 L x 6.00 mole HCl x 1 mole H2 x 22.4 L 1 L 2 mole HCl 1 mole = 8.40 L of H2 gas where did the 22.4L come from?

    asked by Blain on April 13, 2011
  40. mixture problem

    Lisa will make punch that is 25% fruit juice by adding pure fruit juice to a 2-liter mixture that is 10% pure fruit juice. How many liters of pure fruit juice does she need to add?

    asked by Marie on May 28, 2008
  41. science chemistry

    1000g of a 55%(mass percentage) nitric acid solution is to be diluted to 20%(mass percentage) nitric acid solution.how many liters of water should be added to the starting solution?

    asked by Muhammad on November 5, 2012
  42. Chemistry

    1000 g of 55%(mass percentage) nitric acid solution is to be diluted to 20%(mass percentage) nitric acid solution. How many liters of water should be added to the starting solution?

    asked by Wube on May 2, 2012
  43. Chemistry

    a) An equilibrium exists between three chemical species in the blood , Hemoglobin, oxygenated hemoglobin and oxygen. Using the symbols Hb for hemoglobin , O2 for oxygen and HbO2 for oxygenated hemoglobin write out the equilibrium reaction. If you have

    asked by AB on November 26, 2011
  44. Marketing (Help Check)

    24.Which of the following is characteristic of the organizational buying process? A)Multiple parties participate in purchase decisions. B)Negotiation between buyers and sellers is commonplace. C)Online buying over the Internet is widespread. D)Buying

    asked by Bryan on November 8, 2009
  45. Finance

    Your company, Martin Industries, Inc., has experienced a higher than expected demand for its new product line. The company plans to expand its operation by 25% by spending $5,000,000 for an additional building. The firm would like to maintain its 40% debt

    asked by Miss Patte on November 1, 2015
  46. Chemistry

    solution of hydrogen peroxide, H2O2 , is titrated with potassium permanganate, KMnO4 , according to the following equation: 5 H2O2 + 2 KMnO4+ 3H2SO4 -> 5O2 + 2 MnSO4 +8H2O + K2SO4 It requires 46.9mL of 0.145 mol/L KMnO4 to titrate 50.0 mL of the solution

    asked by Brenan on March 30, 2008
  47. physics

    Sewage at a certain pumping station is raised vertically by 5.27 m at the rate of 1 930 000 liters each day. The sewage, of density 1 050 kg/m3, enters and leaves the pump at atmospheric pressure and through pipes of equal diameter. (a) Find the output

    asked by Anonymous on March 8, 2012
  48. Physics

    Sewage at a certain pumping station is raised vertically by 5.57 m at the rate of 1 860 000 liters each day. The sewage, of density 1 050 kg/m3, enters and leaves the pump at atmospheric pressure and through pipes of equal diameter. (a) Find the output

    asked by Michelle on March 16, 2013
  49. Chemistry

    The reaction describing the formation of ozone from oxygen is shown below. 3 O2(g) 2 O3(g) Calculate Grxn at 288 K for this reaction in a flask where [O2] = 3.419 x 10-2 M and [O3] = 5.783 x 10-4 M. Assume G° = 326 kJ. Use molarity to construct the

    asked by Summer on January 2, 2012
  50. Chemistry

    Um how do i balance these word equations for chemistry... I think I'm suppose to look them up on a common table of ions and then I don't know wat to do ferric Oxid --> iron oxygen what exactly am i suppose to do please tel me thr throught process that's

    asked by Bob on December 11, 2008
  51. Chemistry

    Acetylene(C2H2) torches are used in welding. How much heat (in kJ) evolves when 2.0L of C2H2 (d=1.0967kg/m3) is mixed with a stoichiometric amount of oxygen gas? The combustion reaction is C2H2(g)+52O2(g)→2CO2(g)+H2O(l), ΔH∘=−1299.5kJ

    asked by Kelly on March 24, 2014
  52. Chemistry

    What is the percent by mass of C in methyl acetate (C3H6O2)? The molecular weight of carbon is 12.0107 g/mol, of hydrogen 1.00794 g/mol, and of oxygen 15.9994 g/mol. Answer in units of %. Please work it out for me so I totally understand it. Thanks!

    asked by Randy on December 6, 2009
  53. American gov

    16. What ruling did the Supreme Court make regarding flag burning in Texas v. Johnson? (1 point) It is legal to burn flags other than the U.S. flag, but burning an American flag is not free speech because it affects public morale. Burning any sort of flag

    asked by Anonymous on March 29, 2017
  54. chemistry

    what is the molarity of a solution made by mixing 178.5 of 1.5 M NaCl with 283.4m of 4.3M NaCl Mnacl*L nacle =(1.5)(.001718)=.0026775 moles nacl=(4.3)*(.002834)=.0121862 total moles = .0026775+.0121862=.0148moles final volume = .001785+.002834=.004819 L

    asked by amber on October 3, 2010
  55. College chemistry

    Calculate the number of grams of silver nitrate required to prepare 2.00L of 0.500 M AgNO3.

    asked by mysterylvr6 on April 6, 2009
  56. chemistry

    What volume of 0.0482 M Ba(OH)2 is required to neutralize exactly 16.10 mL of 0.141 M H3PO4? Phosphoric acid contains three acidic hydrogens.

    asked by justin on October 28, 2010
  57. Chemistry

    What mass of NaNo3 would be required to prepare 10% solution of the salt in 100cm square of distilled water

    asked by Osegbe on July 1, 2011
  58. chemistry

    Balance this equation. If a coefficient of "1" is required, choose "blank" for that box. CH4 + O2 → CO2 + H2O

    asked by derek on May 2, 2016
  59. Federal polytechnic, oko

    What force would be required to accelerate an electron mass of 0.009kg from rest to a velocity of 104m/s in 10 seconds.

    asked by Chris on October 27, 2015
  60. chemistry

    What volume of 0.076M HNO3 is required to titrate 20.0ML of 0.25M Ba(OH)2 solution? use 2 sig figures

    asked by jennifer on June 16, 2015
  61. Chemistry

    What mass of sodium bromide (NaBr) is required to make 250 cm3 of a 0.35 mol.dm-3 solution?

    asked by Kelly on January 12, 2012
  62. science

    Determine the kinetic energy required to throw a 500g ball vertically to a height of 9.20m?

    asked by Kate on September 17, 2018
  63. chemistry

    Calculate the total amount of heat (in calories) that would be required to convert 15.0 g of ice at 0 oC to 15.0 g of steam at 100 oC.

    asked by david drame on April 26, 2012
  64. Technology Skills class???? Grade 9???

    So I got accept to this Catholic private high school. So we are required to take "Technology Skills". What am I going to learn in this class??????

    asked by Laruen on May 7, 2013
  65. Chemistry

    How many calories are required at 0 degrees C to melt an ice cube with a mass of 25g? I got 2000 cal. Could you tell me if this is right?

    asked by Eric on September 18, 2010
  66. math

    a ground is 80m wide& 60m long. how much wire is required for fits fencing in two rows.

    asked by anita on April 22, 2014
  67. Chemistry

    If vinegar sample #1 requires 29.05 mL of NaOH solution to reach an endpoint, what volume should be required for samples #2 and #3?

    asked by Gladys on November 2, 2014
  68. chemistry

    how many kilojoules of energy are required to bring 800.0g water from 20.0c to the boiling point. not sure what formula is? 4.184j

    asked by melissa on September 11, 2015
  69. Chemistry

    What volume of 18.00 M HCl is required to completely neutralize 750.0 kg of barium hydroxide at 25.0 degrees C and 760 mm Hg?

    asked by Sean P. on June 8, 2010
  70. Chemistry

    What is the HCl concentration if 72.1ml of 0.035M NaOH is required to titrate a 20.0ml sample of the acid?

    asked by Sara on July 18, 2012
  71. chemistry

    How many grams of water are required to dissolve 27.8g of NH4(NO3)(MM=80.05 g/mol)to make a 0.500M solution?

    asked by Carrie on March 4, 2012
  72. Chemistry

    If 25.0 mLs of 0.150M nitric acid was used, how many grams of barium carbonate would be required for complete reaction?

    asked by Jessica on July 2, 2013
  73. chemistry

    The amount of energy required to remove an electron from the surface of Hg is 7.22x10^-19 J. What is the threshold frequency of mercury? I got 1.09*10^15 hz is it right?

    asked by lo on June 21, 2016
  74. Chem 11

    How many grams of O2 are required to produce 255grams of SO2 in following reaction? 4FeS2+11O2===> 2Fe2O3+8SO2

    asked by Emmy on October 20, 2010
  75. chemistry

    calculate the weight of oxalic acid required to neutralise 250 ml, 0.1 normal KOH sollution?

    asked by Anonymous on September 8, 2013
  76. Chem - Stoichiometry

    How many grams of sodium carbonate is required for a complete reaction with 1.00g of calcium chloride dihydrate? Help!

    asked by Erin on October 17, 2009
  77. physics

    If a person does 80 J of work in moving a 30 \rm{kg} box over a 13 m distance on a horizontal surface, what is the minimum force required?

    asked by Jon on October 6, 2010
  78. Math

    What nominal annual rate of interest compounded yearly is required to double an investment in 13 years?

    asked by Lexie on November 10, 2012
  79. trig

    What would be the force required to push a 100-pound object along a ramp that is inclined 10 degrees with the horizontal?

    asked by greenburrow on March 19, 2012
  80. maths

    a rectangular courtyard is 57 cm 50 cm long and 22 m . determine the least possible number of square stones of the same size required to pave it.

    asked by maths on July 16, 2016
  81. Chemistry

    How much heat is required to vaporize 343g of liquid ethanol at its boiling point? ΔHvap+38.6 Kj\mol

    asked by Anonymous on February 22, 2010

    Calculate the force required to remove a suction cup of area 2.60 cm2 from the surface to which it is stuck.

    asked by JOHN on March 26, 2012
  83. chemistry

    Please help again. How many grams of lithium are required to completely react with 70.7 mL of N2 gas at STP when given the following reaction: 6Li + N2 = 2Li3N

    asked by Lisa on December 3, 2011
  84. chemistry

    For each titration of a buffer, how do i calculate how many mLs of titrant were required to obtain a 1.00 pH unit change from the initial pH?

    asked by Wendy on February 27, 2011
  85. chemistry

    how much heat is required to raise the temperature of one mole of NaCl(s) by 15 degrees celsius at constant pressure

    asked by emoni on February 23, 2011
  86. Chemistry

    What mass of MgSO4 · 7H2O is required to prepare 800 mL of a 0.442MMgSO4 solution? Answer in units of g.

    asked by Mike on October 11, 2010
  87. Physics

    How much power is required to lift a 25kg box to the top of a 4 meter flight of stairs in 3.5 seconds

    asked by Rebecca on November 24, 2018
  88. chemistry

    What mass of steam is required to release 4.36 × 105 kJ of heat energy on condensation? answer in unit of g.

    asked by Anonymous on December 1, 2011
  89. Chemistry

    How do I calculate the mass of sodium carbonate required to neutralize 15-20 mL of 0.25M HCl at the stoichiometric point?

    asked by Joel on May 17, 2012
  90. chemistry

    Silver is electroplated at the cathode of an electrolysis cell by 1/2 reaction Ag(aq) + e- --> Ag(s). How many moles of electrons are required to electroplate 5.8g of Ag?

    asked by Ashley on November 30, 2011
  91. chemistry

    In the previous example, how many ml of 0.1M kmn04 are required to react with 30ml of 0.05M h202? the answer 3ml who helps

    asked by Fai on February 10, 2013
  92. Chem - Stoichiometry

    How many grams of sodium carbonate is required for a complete reaction with 1.00g of calcium chloride dihydrate? Help!

    asked by Erin on October 18, 2009
  93. Chem

    What mass of MgSO4 · 7H2O is required to prepare 700 mL of a 0.342MMgSO4 solution? Answer in units of g.

    asked by Chandler on September 11, 2011
  94. Physics

    I don't understand what formula to use for this question: Points A and B each have an electric potential of +9 V. How much work is required to take 1 mC of charge from A to B? Thank you

    asked by Anna on July 19, 2016
  95. Career Plz help................

    If the pay for a possible career is less than you required for your ideal lifestyle, then you will just have to learn to live on that budget. True*** False

    asked by Labbayk on November 17, 2015
  96. Science

    Eight bricks 6 cm thick with mass 1.5kg lie flat on a table.how much work is required to top them one on another?

    asked by Christopher on May 14, 2012
  97. physics

    What average force is required to stop an 1100-kg car in 8.0 s if it is traveling at 95 km/h? i got the answer to be 13062.5 N. i don't think that's right...

    asked by beckii on November 21, 2007
  98. Chemistry

    Calculate the amount (volume) of 0.135 M HClO4 solution required to neutralize 57.00 mL of .089 M NaOH

    asked by Vicky on October 6, 2012
  99. Social Studies

    Which of the following technologies required the measurement of the stars for navigation? A. compass** B. lateen C. Mercator projection D. astrolabe

    asked by sam on December 6, 2018
  100. Chemistry

    what mass of hydrogen chloride gas is required to produce 250 ml of hydrochloric acid solution with a pH of 1.57

    asked by John on April 9, 2016