1. physical science with earth science

    Write a balanced chemical equation for the reaction for propane C3H8 burning in oxygen to for carbon dioxide and water vapor
  2. stoichiometry

    What mass of nitrogen monoxide can be made by the reaction of 8.00 g ammonia and 17.0 g oxygen? correct answer is 12.8 ± 0.1 (g) I keep getting 14.1 g and that the limiting reagent is NH3 What am I doing wrong?
  3. Chemistry

    How many grams of commercial C2H4O2 (97% pure by mass) must be allowed to react with an excess of PCl3 to produce 75.0g of C2H3OCL if the reaction has a 78.2% yield?
  4. chemistry

    How much heat is gained (in Joules) by the water where a chemical reaction takes place in 100 mL aqueous solution and has a temperature increase of 14 C?
  5. chem

    whats the net ionic equation for the following reaction AgNo3(aq)+Na2SO4(aq) answer 2Ag+(aq)+SO42- (aq)___> Ag2So4(s) correct?
  6. CHemistry

    write the balanced net ionic equation that shows the formation of Fe(OH)3 in the reaction of iron (III) nitrate with sodium hydroxide. Please help
  7. Chemistry

    What minimum volume of 3.0 M H2SO4 is required to produced 13 L of H2 at STP? Reaction formula: 2Al(s) + 3H2SO4(aq) --> Al2(SO4)3(aq) + 3H2 (g)
  8. earth science

    When I bumped the table, the coffee in my cup spilled out. Newton's _____ law explains this reaction. 1st 2nd 3rd
  9. Chemistry

    Complete the reaction: Methanol and propanoic acid are mixed. Okay, I got the two formulas: CH3OH + CH3CH2COOH ---> ??? ...now I don't know what to do. Lots of CH3's and CH2's. Help? Thanks!
  10. CHemistry

    For the reaction 2 Na + 2 H2O -------> 2 NaOH + H2, how many grams of hydrogen gas are produced when 133.6 g of water are reacted? I am soooo confused in chemistry. Please help.
  11. chemistry

    What products are formed when aqueous solutions of Na2SO4, Fe3SO42, and BaCl2 are mixed together ? Can someone help me write out a balanced equation for the reaction that occurs.
  12. chemistry

    write half reaction for KMnO4 and (COMM)2 and balance the equation.calculate the atomic mass of M in14.0g/dm3 of solution
  13. chemistry

    0.43g limestone and 98cm3 of carbon dioxide are produced on reaction with excess hydrochloric acid. How much calcium carbonate is present?
  14. Chemistry

    Write a balanced net ionic equation (include physical states) for the following reaction: HClO2(aq)+NaOH(aq)=H2O(l)+NaClO2(aq)
  15. science

    how can you define the problem how far can you make a rubber stopper fly through the air if the only force applied comes from a gas forming chemical reaction
  16. CHEMISTRY

    If an explanation for correct answer could be provided, that would be great! Which equilibrium constant indicates that the reaction will produce mostly products? a. Kc = 3.46x10-6 b. Kc = 1.96x10+7 c. Kc = 0.319 d. Kc = 0.37
  17. chemistry

    At 2200 degrees celsius,kp=0.050 for the reaction: n2(g)+O2(g) ->2NO(g)
  18. chemistry

    Given the equilibrium constant values: N2 + 1/2O2 >>> N2O ; kc = 2.7 * 10^-18 N2O4>>>>2NO2 kc=4.6*10^-3 1/2N2 + O2>>>NO2 kc = 4.1 * 10^-9 What is a value of Kc for this reaction? 2N2O + 3O2 >>> 2N2O4
  19. Chemistry

    I need help with Stoichiometry Mapping and solving using the "line bar" method Cl2P4(s)+6Cl2(g) --> 4PCl3(g) How many mL of PCl3 can be produced by the reaction of so g of Cl2(g)
  20. Chemistry

    Write a net ionic equation for the reaction that occurs when aqueous solutions of hydroiodic acid and barium hydroxide are combined.
  21. Science - Biology

    Please can someone help me! I've got to do a biology experiment to Investigate the relationship between reaction temperature and the effectiveness of action of the enzyme amylase on starch. I really don't know what it is all about pls someone help :)
  22. Exo and Endo

    D. What tests and observations should be conducted after the reaction to determine if new substances are formed? I am working on a project called Exothermic and Endothermic Reactions….I need help please!
  23. Chemistry

    Write a net ionic equation for the reaction that occurs when aqueous solutions of potassium hydroxide and nitrous acid are combined.
  24. Chemistry

    If in an experimental reaction 32.5 mL were collected of hydrogen gas at 23.5 degrees celsius and 745.2 Torr what would be the volume corrected to STP conditions?
  25. Chemistry

    42. List four of the factors that affect the rate of a chemical reaction. Temperature Concentration of reactants Surface area Volume Is this correct? Thanks -MC
  26. chemistry-chemical kinetics

    by what factor is the rate of detoxification changed if a liver enzyme lowers the activation energy of the reaction by 5 kJ/mol at 37 degree celsius?
  27. chemistry

    Write a balanced equation for the proton transfer reaction between water and phosphate ion. Determine in which direction the equilibrium is favored.
  28. URGENT CHEM

    Write a balanced equation for the following reduction-oxidation reaction. SO3(2-) + MnO4(-) --- SO4(2–) + Mn(2+) numbers in parenthesis means the charge
  29. Chemistry

    For the reaction shown, compute the theoretical yield of the product in grams for each of the following initial amounts of reactancts 2Al(s) + 3Cl2(g) = 2AlCl3(s)
  30. Chemistry

    What volume of hydrogen, measured at 25 C and 1.00 atm can be produced by dissolving 5.0 g of magnesium in hydrochloric acid? (Write and balance the equation for the reaction first.)
  31. Science

    science 10 little experiment why does water added to an unknown white power(teacher won't tell) makes it slimy? whats the reaction?
  32. Chemistry

    What mass (g) of water is produced by the combustion of 48.8 g of propane according to the following reaction? Round your answer to one decimal place. C3H8(g) + 5 O2(g) --> 3 CO2(g) + 4 H2O (l)
  33. Chemistry

    The rate constant for this first-order reaction is 0.440 s-1 at 400 C. A to products How long in seconds would it take for concentration of A to decrease from 0.740 M 0.290 M?
  34. chemistry

    Which of the following compounds would result in an exchange reaction if mixed in an aqueous solution with (NH4)2S? a. SrCl2 b. Li2C2O4 c. CH3CO2Ag d. MnSO4 I don't know what to look for.
  35. Chemistry

    How many grams of hydrochloric acid should we use so we have exactly enough to react with 40g of sodium hydroxide? You'll need to write a chemical reaction, balance it, and then perform your calculation.
  36. Chemistry 1

    What is the minimum amount of a 6.0 M solution of sulfuric acid necessary to produce 25 grams of hydrogen gas if the molar ratio in the chemical reaction is a 1:1
  37. chemistry

    Complete and balance the following reactions, where applicable. If no reaction occurs, write N.R. Li + H2O ---> KCI + F2 ---> Au + HNO3 ----> CI2 + NaF ---> Li + Fe(NO3)3 --->
  38. chemistry

    Given one of the starting materials and end product for each of the following reactions, show all reactants, reaction conditions in brackets (where known) and products. fluoroethane from ethanol
  39. chemistry

    Write a net ionic equation for the reaction that occurs when aqueous solutions of sodium hydroxide and perchloric acid are combined.
  40. Chemistry

    For the oxidation-reduction reaction equation given here, 2Rb+Br2 --> 2RbBr Indicate how many electrons are transferred in the formation of one formula unit of product.
  41. Chemistry

    Please help !!!! In addition to the main product what are two side reactions that could occur in the experiment of The Diels-Alder Reaction of Cyclopentadiene with Maleic Anhydride. Thanks
  42. physics

    Determine the stopping distances for an automobile going a constant initial speed of 97km/h and human reaction time of 0.50s , for an acceleration a=−6.5m/s2
  43. Chemical Kinetics

    When experimentally determining the rate law, i am getting a negative fraction. is that right or am i doing something wrong? It is possibly right. I'd have to see you calculations to determine that. It would mean that the reaction is proceeding backwards.
  44. Chemistry

    For the oxidation-reduction reaction equation given here, 2Rb+Br2 --> 2RbBr Indicate how many electrons are transferred in the formation of one formula unit of product.
  45. Idontgetit

    The value of the equilibrium constant, Kc, at a certain temperature is 8.33 x 10-4. Would the reaction as represented by the chemical equation favor reactants or products? Enter P or R. Cl2CO(g) = CO(g)+Cl2(g)
  46. AP Chemistry

    We drop 17.3 grams of magnesium into 435 mL of a 2 M HCl solution. What is the maximum volume of dry hydrogen that could be produced by this reaction at STP?
  47. Chemistry: Stoichiometry

    calculate the number of oxygen needed to oxidize 12.5grams of glucose (C6H12O6) into carbon dioxide and water. (Combustion reaction)
  48. Chemistry: Stoichiometry

    calculate the number of oxygen needed to oxidize 12.5grams of glucose (C6H12O6) into carbon dioxide and water. (Combustion reaction)
  49. Chemistry

    The reaction: 2 HI==> H2 + I2, is second order and the rate constant at 800 K is 9.70 x 10-2 M-1 s-1. How long will it take for 8.00 x 10-2 mol/L of HI to decrease to one-fourth of its initial concentration? can someone please show me how to set this up?
  50. Science

    Can anyone exlplain how particles behave in the reaction between iron and sulphur???!!! Ive checked all over google and cant find any helpful answers!!! PLZ HELP ME!!
  51. Chemisty

    You started the conventional synthesis with 0.015 mole of salicylic acid. If the reaction worked perfectly, how many moles of aspirin would you make?
  52. chemistry

    When HgO is heated, it decomposes into elemental mercury and molecular oxygen gas. If 66.0 g of Hg is obtained from 82.0 g of the oxide, what is the percent yield of the reaction?
  53. chemistry

    Calculate the heat of reaction for changing 1.00 mol of silica that has been extracted from sand into the pure silicon that is need to make computer chips
  54. Science

    Describe the action and reaction force pairs involve when an object falls toward Earth. Ignore the effects of air resistance.
  55. chemistry

    Can aluminum (Al) react with K2SO4 by single replacement to yield products? Using the activity series chart, I know that K is more reactive than Al so does that mean that a reaction will occur or not?
  56. chemistry

    Consider the following reaction. CH4(g) + 2 O2(g) CO2(g) + 2 H2O(l) ÄH = -891 kJ Calculate the enthalpy change for each of the following cases. (a) 5.00 g methane is burned in excess oxygen.
  57. chemistry

    Given one of the starting materials and end product for each of the following reactions, show all reactants, reaction conditions in brackets (where known) and products. fluoroethane from ethanol
  58. Contemporary Business Communication

    What kind of unwanted reaction will I encounter when trying to convince a business committee to accept my proposal for a professional photography studio in their building?
  59. Chemistry

    how to determine the change in the number of moles of gas in the reaction 2H2 g + O2 g= 2H2Ol i thought it was 2 because the product is a liquid but that isn't correct
  60. chem

    18.1g of ammonia and 90.4g of copper(II) oxide are used in the reaction 2NH3+3CuO=N2+3Cu+3H3O.What is the limiting reactant? How many grams of nitrogen will be formed?
  61. Chemistry

    A commercial for a well known cleaning powder says that it "shakes out white, then turns blue" what type of reaction os occuring? what compound can one use to produce this effect?
  62. chemistry

    Complete and balance the following reactions, where applicable. If no reaction occurs, write N.R. Li + H2O ----> KCI + F2 ---> Au + HNO3 ---> CI2 + NaF ----> Li + Fe(NO3)3 --->
  63. Chemistry

    Use bond energy values to estimate delta H fro the following reaction in the gas phase: C2H4 + Br2 -> CH2BrCH2Br I am in dire need of help! Thank you
  64. Chem

    Calculate the Go for the oxidation of 5 moles of tin in the following balanced reaction. 16HCl + 2KMnO4 + 5Sn ---> 5SnCl2 + 2MnCl2 + 2KCl + 8H2O
  65. ap chemistry

    We drop 50.5 grams of magnesium into 572 mL of a 3 M HCl solution. What is the maximum volume of dry hydrogen that could be produced by this reaction at STP?
  66. Chemistry

    True or False? An increase in pressure for a system composed entirely of gases will cause the reaction to shift to the side that contains the larger number of moles.
  67. ap chemisrty

    When heated, cyclopropane is converted to propene. Rate constants for this reaction at 470°C and 510°C are k = 1.10 10-4 s-1 and k = 1.02 10-3 s-1, respectively. Determine the activation energy, Ea, from these data.
  68. chemistry

    What mass of carbon dioxide can be produced from 4 moles of sodium bicarbonate according to the following unbalanced reaction, NaHCO3 --> Na2CO3 + CO2 + H2O?
  69. Chemistry Lab

    5.00 mL of .00500 M ferric nitrate is added to 5.00 mL of nitric acid and 10.0 mL of .00250 M thiocyanate solution. Calculate the intial Fe^3+ concentration before reaction. So how do I go about doing this?
  70. literature

    In the Merchant of Venice, What is Shylock’s initial reaction to Launcelot’s leaving his service? I googled it many times, but I couldn't find the answer! Thanks!
  71. Chemistry

    Under acidic conditions, MnO4− becomes Mn2+. Write the balanced half-reaction for this transformation. (Omit states-of-matter from your answer.)
  72. chemistry

    The rate constant for this first-order reaction is 0.320 s–1 at 400 °C. A--> Products How long (in seconds) would it take for the concentration of A to decrease from 0.830 M to 0.220 M?
  73. Physics

    An object of mass 10kg is placed on an inclined plane at 30 degree to the horizontal. Calculate the reaction between two surface and what is the coefficient of static friction.
  74. science

    When I bumped the table, the coffee in my cup spilled out. Newton's _____ law explains this reaction. 1st 2nd 3rd
  75. Chemitry

    If he activation energy of a reaction is 4.86Kj, then waht is the percent increase in the rate constant of a raction when the temperature is increased from 45 to 75C
  76. Chemistry

    The standard enthalphies of formation of ozone, O3(g), and oxygen atoms are +142.70 and +249.17 kJ/mol. Calculate the reaction enthalpy for 2O2(g)-->O3(g)+O(g)
  77. Chem---DrBob222

    What are the relative rates of reaction of primary, secondary and tertiary alkyly halides in an SN1 substitution? Explain the reason for your answer? Thank you so much?
  78. chemistry

    we did a lab where we mixed an iron nail with cupric chloride to find the reaction is this the balanced equation... Fe + CuCl2 --> FeCl2 + Cu or would Fe and Cl bond different??
  79. AP chemistry

    Given the standard molar entropies measured at 25 C and 1 ATM pressure calculate delta S for the reaction 2al + 3 mg0 ---> 3mg + al2o3
  80. Chemistry

    Write a net ionic equation for the reaction that occurs when aqueous solutions of barium hydroxide and hypochlorous acid are combined.
  81. chem

    I don't understand ehat is the chemistry behind the ASA – FeCl3 reaction? what is this question even asking? any response will do so plz help (Broken Link Removed)
  82. chemistry

    Which of the answer choices is correctly defined as the materials that enter into a chemical reaction and are changed by it? solutes reactants products coefficients is it a?
  83. Chemistry

    Consider the following unbalanced reaction: Fe2O3 (s) + CO (g) --> Fe (s) + CO2 (g) How many moles of carbon dioxide are produced per mole of iron (III) oxide reacted?
  84. College Chemistry

    One liter of benzene (C6H6) is completely burned (oxidized) with air. Write a balanced chemical equation to represent this reaction.
  85. chemistry

    Arrange the three metals in order of their relative strengths as reducing agents, placing the strongest first. Write each metal as a half reaction.
  86. Chemistry

    Based on the steps occurring in an acid-base reaction, which definition of acids and bases is most practical? Give three reasons for your choice.
  87. Chem---DrBob222

    How would you carry out the conversations below? give two possible reactions you could use in each case, writing an equation for each reaction. a) 3,3-dimethylbut-1-ol to 3,3-dimethybutylchloride. b) cyclohexanol to cyclohexyl chloride. I think I've got
  88. English

    how can I rephrase this sentence to avoid plagarism. The hydroboration reaction has hecome an important tool in the repertoire of the synthetic organic chemi~
  89. chemistry

    Consider the following unbalanced reaction: Fe2O3 (s) + CO (g) --> Fe (s) + CO2 (g) How many moles of carbon dioxide are produced per mole of iron (III) oxide reacted.
  90. Chemistry

    Given the following reaction for photosynthesis, 6CO2 + 6H2O --> C6H12O6 + 6O2, how many liters of O2 can be produced from 100 g of water at standard temperature and pressure?
  91. chemistry

    using the balanced equation for the fermentation reaction, calculate for the theoretical amount of alcohol to be produced using 10 grams of sucrose. 0.79 g/ml is ethanol's density.
  92. Chemistry

    Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Cr2 ] = 0.859 M and [Ni2 ] = 0.0190 M. Standard reduction potentials can be found here.
  93. Chemistry

    Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Cr2 ] = 0.859 M and [Ni2 ] = 0.0190 M. Standard reduction potentials can be found here.
  94. Chem

    how many millimeters of 0.200M FeCL3 are needed to react with an excess of Na2S to produce 1.38g of Fe2S3 if the percent yield for the reaction is 65.0%
  95. Chemistry

    Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Cr2 ] = 0.859 M and [Ni2 ] = 0.0190 M. Standard reduction potentials can be found here. Cr+Ni(2+) ->Cr(2+) + Ni
  96. chemistry

    The equation for the reaction of sodium with water is as follows: 2Na(s) 2H2O(l) £ H2(g) 2NaOH(aq) How many liters of H2 are produced when 12.0 g of Na reacts with H2O at 293 K and 99.3 kPa?
  97. Chemistry

    Write the net ionic equation for the reaction between sodium chloride and cobalt (ll) nitrate. so far i have... 2NaCl(aq)+ Co(NO3)2(aq)---> NaNO3(aq)+CoCl2(s)
  98. University of Papua New Guinea

    Give equations with reaction conditions to show direct esterification methods for the production of A) isopropyl butanoate B) ethyl- 2-methylpropanoate
  99. chem

    How many CO2 molecules would be formed from the reaction mixture that produces the greatest amount of products? 2CH3OH(g)+3O2(g)--->2CO2(g)+4H2O(g)
  100. chem

    How many CO2 molecules would be formed from the reaction mixture that produces the greatest amount of products? 2CH3OH(g)+3O2(g)--->2CO2(g)+4H2O(g)