1. Chem

    I really appreciate the help you gave me earlier. I was wondering if you could please look over these questions for me to? The answers will always be either reactant, product or neither. 1)P4(s)+6 Cl2(g)4 PCl3(l) Which side of the reaction will be favoured

    asked by TINA on January 30, 2012
  2. politics

    What was the White House reaction to Lesley Stahl’s critical report on Reagan’s use of television? A. CBS News was excluded from White House press conferences. B. Stahl was honored at a White House ceremony. C. The reaction was very positive, because

    asked by bev on May 29, 2017
  3. Chemistry (equilibrium)

    In the following equilibrium system, N2O4(g) NO2(g), what happens to the color of the gas if the forward reaction speeds up? What happens if the reverse reaction speeds up? What happens if the forward and reverse reaction happen at the same time? NO2 is a

    asked by abby on April 1, 2007
  4. Chemistry

    Iodine Clock Reaction How does the concentration of iodide ion change during the initial portion of the reaction, while there is still unreacted thiosulfate present http://quiz2.chem.arizona.edu/preproom/Demo%20Files/the_iodine_clock_reaction.htm how does

    asked by Anonymous on February 28, 2007
  5. Chemistry

    For the reaction 2CH3OH + 3O2 → 2CO2+ 4H2O, what is the maximum amount of CO2 which could be formed from 13.97 g of CH3OH and 5.45 g of O2? Answer in units of g. Consider the reaction H3PO4 + 3NaOH → Na3PO4 + 3H2O. How much Na3PO4 can be prepared by

    asked by Farrell on March 11, 2015
  6. Physics

    A soccer player kicks the ball that travels a distance of 36.0 m on a level field. The ball leaves his foot at an initial speed of (v0) and an angle of 30.0° above the ground. Find the initial speed (v0) of the ball.

    asked by Alina on September 20, 2018
  7. Physics

    A 8.38g bullet is fired into a 4.60kg block suspended as in the figure. The bullet stops in the block, which rises 15.0cm above its initial position. Find initial speed of the bullet.

    asked by Jose on February 13, 2013
  8. chemistry

    Mix together 5.0 mL of solution #1 – 1.0 M HA with 35 mL of solution #2 – 1.0 M NaA in a small Erlenmeyer flask. What are the concentrations of HA and A– in solution #7?

    asked by kris on August 17, 2010
  9. physics

    A ball was shot from the angles given in the table below. The corresponding ranges (landing at the same height from which it is shot) for three trials are given below as well. A. Determine the average range and standard deviation for each angle. B. Next

    asked by Meghan on October 20, 2010
  10. Physics

    If you throw a ball through a pile of sand, it will slow down in the sand and emerge at less that its initial speed. But when light shines on a pane of glass, even though it slows down inside, its speed upon emerging is the same as its initial speed.

    asked by Hanako on January 31, 2010
  11. physics

    A shell fired from the ground with an initial speed of 1.70 x 10^3 m/s at an initial angle of 55 degrees to the horizontal. neglecting air resistance, find a) the shell's horizontal range b)the amount of time the shell is in motion.

    asked by luke on November 6, 2010
  12. Physics

    A ball is thrown horizontally from a height of 16.01 m and hits the ground with a speed that is 5.0 times its initial speed. What was the initial speed? This question really boggles my brain. I have no idea how to solve this, given only the height. Could

    asked by Lindsay on November 4, 2007
  13. chemistry

    A student weighed out 1.5g of salicylic acid into a flask and then added 4ml of acetic an hydride to react. He also added 5 drops of concentrated sulfuric acid. Density of acetic an hydride is 1.08g/ml and sulfuric acid is 1.85g/ml (sulfuric acid is a

    asked by Anonymous on April 19, 2010
  14. CHEMISTRY

    The heat evolved in the reaction of hydrobromic acid with potassium hydroxide was determined using a coffee coup calorimeter. The equation for the reaction is: HBr(aq) + KOH(aq) -------------> KBr(aq) + H2O(l) When 25.0 mL of 1.00 M HBr at a temperature of

    asked by TOM on November 17, 2017
  15. Physics

    A 5.00-kg box is suspended from the ceiling by a cord that is 50.0 cm long. A 10.0-g bullet was fired horizontally with speed at 350 m/s into the box. By how much will the vertical height of the pendulum change? Clue: To get the speed of bullet and box

    asked by Candu on October 5, 2017
  16. PHYSICS

    2.6 kg mass initial velocity of v1 =aˆi, where a = 5.95 m/s collides with and sticks to a 1.59 kg mass with an initial velocity of v1 = bˆj, where b = −4.8 m/s. Find the final speed of the composite mass. Answer in units of m/s

    asked by PLEASE PHYSICS HELP on October 22, 2011
  17. chemistry

    A reaction mixture is in a 5.4 L flask at 25 oC initially contains only 7.64 grams of acetic acid. (CH3COOH). Set up your I.C.E. table and use it to answer the following questions. HINT: You will need to look up the Ka for this equilibrium reaction.

    asked by juan on March 2, 2011
  18. Chemistry

    Consider the reaction 3CH_4(g)rightarrow C_3H_8(g)+ 2H_2(g). Calculate delta G at 298 K if the reaction mixture consists of 40atm of CH_4, 0.015atm of C_3H_8, and 2.3×10^−2atm of H_2.

    asked by Josh G. on December 6, 2012
  19. Chemistry

    The following reactions is a first order reaction with respect to nitrite ion and its rate constant is 0.0030/s. In a solution that is 10.0 M NO2-, what is the half-life of the reaction? NH4+ + NO2- -->N2 + 2H2O

    asked by Ceamus Angelina on July 1, 2018
  20. chemistry

    Consider the following reaction:4HCl(g)+O2(g)produces 2H2O(g) + 2Cl2(g) How many molecules of Cl2 would be formed from the reaction mixture that produces the greatest amount of products? Express your answer as an integer.

    asked by Anonymous on October 2, 2010
  21. chemistry

    Study the reaction. A(s) + 2BC(aq) →AC2(aq) + B2(g) ΔH = −92.0 kJ/mol Which change would increase the rate of the forward reaction? A. increasing the pressure B. adding more of A(s) C. adding water D. decreasing the temperature B?

    asked by madison on June 9, 2018
  22. Chemistry

    50 mL of a 2.5 M solution of ammonium phosphate is added to 100 mL of 1.5 M solution of calcium nitrate. At the end of the reaction 11.2 grams of solid product were obtained. Whats the % yield of this reaction?

    asked by Hillary on April 18, 2011
  23. Chem

    What reaction(s) could happen if we left the same reaction mixture (from the conversion of dimethyl fumarate to dimethyl maleate) for 6 months in the absence of light? Use chemical eqns to explain your answer.

    asked by Cindy on September 23, 2006
  24. Chemistry

    Consider the reaction 2H2O(g) --> 2H2(g) + O2(g) deltaH = +483.6 kJ/mol at a certain temperature. If the increase in volume is 32.7 L against an external pressure of 1.00 atm, calculate deltaU for the reaction. (1 L * atm = 101.3 J)

    asked by Kim on November 8, 2012
  25. college chemistry

    The chemical reaction representing production of water gas is as follows: C(s)+H2O(l)=CO(g)+H2(g) calculate the enthalpy change in the production of 200L(at 500mmHg and 65degree celcius) of hydrogen by this reaction.

    asked by bennett on November 3, 2008
  26. science(chem)

    How many mg of fluorenone can 0.53mol of sodium borohyride(NaBH4) reduce? ~I don't know how to get this..wouldn't I have to have a reaction equation given to me?? Well I didn't have one for the question given to me so I don't know what to do. I tried

    asked by ~christina~ on October 8, 2007
  27. Chemistry

    Consider the reaction 2H2O(g) → 2H2(g) + O2(g) ΔH = +483.60 kJ/mol at a certain temperature. If the increase in volume is 42.7 L against an external pressure of 1.00 atm, calculate ΔU for this reaction. (The conversion factor is 1 L · atm = 101.3 J.)

    asked by Marissa on October 3, 2018
  28. Chimestry

    (The reaction of calcium hydride and water produces calcium hydroxide and hydrogen as products). How many moles of H_2(g) will be formed in the reaction between 0.90mol CaH_2(s) and 1.33mol H_2O(l)?

    asked by Inni on September 11, 2012
  29. Chemistry

    The combustion of methanol (CH3OH) forms carbon dioxide and water vapor. A combustion reaction refers to a reaction of a substance with oxygen gas. What is the balanced equation?

    asked by Anonymous on October 10, 2017
  30. Chemistry

    Consider the following unbalanced reaction. P4(s) + F2(g)---> PF3(g) How many grams of F2 are needed to produce 114 g of PF3 if the reaction has a 80.3% yield? I've worked it every way I can think, and the online grader says I am wrong. Someone plz lend me

    asked by Jeff on September 13, 2011
  31. Chemistry 104

    The reaction of hydrogen peroxide, sulfuric acid and lead results in the production of lead sulfate in an acidic aqueous solution. Write the balanced equation for this reaction.

    asked by Sophie on May 3, 2013
  32. Physics

    For a certain Chemical reaction, you find that delta H = -100kJ and delta S = -200 J/K. What is the Gibbs free energy for the reaction at: (a) room temperature (b) 800 C (c) comment on whether the reactions are spontaneous or not

    asked by TIna on March 18, 2013
  33. Chemistry 101

    Which of the following will not increase the rate of a reaction? a. using a catalyst b.increasing the temperature c. decreasing the concentration of a reactant d. finding a shorter path for the reaction to take place e. increasing the kinetic energy

    asked by Robert on October 25, 2009
  34. chemistry

    what would the written chemical reaction be to this problem? 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

    asked by anonymous on June 20, 2014
  35. organic chemistry

    Instead of using 1-propanol or 2-pentanol, a student decided to conduct the same reaction you did starting with 2,4-dimethyl-3-pentanol. What product(s) would you predict for this reaction? Show a mechanism to account for any products you propose. How do I

    asked by spirit on April 21, 2009
  36. chemistry

    what is a good experiment for investigating the influence of the size reaction-surface on the reaction tempo of a specific raection. using Cal-c vita tablets, rennies tablets and vinegar...?

    asked by Lizard on February 5, 2011
  37. chemistry

    A reaction has a rate law, rate = kA]B]^2 What is the overall order of the reaction? a. 2 b. 3 c. 0 d. 1 e. 4 chemistry - DrBob222, Friday, February 17, 2012 at 10:53pm The overall is the sum of the orders of each component. still don't get it but guessing

    asked by elvis on February 19, 2012
  38. physics

    Problem 21.10 A proton with an initial speed of 800000 m/s is brought to rest by an electric field. Part B - What was the potential difference that stopped the proton? = Part C - What was the initial kinetic energy of the proton, in electron volts?

    asked by Paige on September 14, 2011
  39. Physics

    Problem 21.10 A proton with an initial speed of 800000 m/s2 is brought to rest by an electric field. Part B - What was the potential difference that stopped the proton? Part C - What was the initial kinetic energy of the proton, in electron volts?

    asked by Paige on September 9, 2011
  40. PHYSICS

    Given: The initial position of the block is the origin; i.e., x = 0 at t = 0 . Consider down the track to be the positive x-direction. A block with an initial velocity v0 slides up and back down a frictionless incline. Which graph best represents a

    asked by Cassandra on October 2, 2011
  41. physics

    A 1.4-kg copper block is given an initial speed of 2.0 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest. (a) If the block absorbs 85% of its initial kinetic energy as internal energy, calculate its increase in

    asked by Anonymous on April 12, 2012
  42. chemistry

    The value of Change in heat for the reaction below is -790 KJ. Calculate the enthalpy change accompanying the reaction of .95 g of S. 2S(s) + 3 O2 --> 2 SO3(g)

    asked by Anonymous on November 6, 2015
  43. Chemistry

    Predict the reaction, if any, that would occur if Sr(NO3)2 and Na2CO3 were mixed. Would any reaction occur if HBr were added? Thank You

    asked by Arnub on January 28, 2012
  44. chemistry

    Given the thermochemical equation: 2 Al(s) + 3/2 O2(g) > Al2O3(s) ΔH = -95.7 kJ find the heat of reaction, ΔH, for the following reaction: 2 Al2O3(s)> 4 Al(s) + 3 O2(g) Select one: a. -95.7 kJ b. +95.7 kJ c. -47.8 kJ d. +47.8 kJ e. +191.4 kJ

    asked by tal on May 15, 2014
  45. chemistry

    When Cl- is added to the following reaction at equilibrium, does the reaction go in the forward direction, reverse direction, or remain unchanged? Ag-->Ag^+ + Cl^-

    asked by Anonymous on July 19, 2010
  46. Chemistry

    In the reaction 2A+B2 to 2AB if 0.5 moles of A and an excess of B are combined and the reaction goes to %100 completion, then how many moles of C are formed?

    asked by Alanna on November 23, 2014
  47. chemistry

    Consider the following unbalanced reaction. P4(s) + F2(g) PF3(g) How many grams of F2 are needed to produce 212 g of PF3 if the reaction has a 79.8% yield?

    asked by Kris on August 1, 2013
  48. Chemistry

    A chemical reaction produces 3.75 L of chlorine gas at STP. How many moles of chlorine are produced by the reaction?

    asked by Karina on August 25, 2017
  49. CHEMISTRY

    The enthalpy change of an endothermic reaction is 8 kJ , and this reaction is spontaneous at 25 oC ,, what is the expected entropy change ? thank you a lot

    asked by MAD on July 6, 2014
  50. Chemistry

    Predict the reaction, if any, which would occur if AgNO3 and KBr were mixed. Would any reaction occur if HNO3 was added? Thanks!

    asked by Ajunb on January 28, 2012
  51. Chemistry

    Consider the following unbalanced reaction. P4(s) + F2(g) PF3(g) What mass of F2 is needed to produce 212 g of PF3 if the reaction has a 84.2% yield?

    asked by Cole on October 10, 2011
  52. Chemistry

    what is the balanced equation of: Combination reaction: Li2O(s)+H2O(l)-->(?) I know what a combination reaction is but I don't know how to do it when it is complex like this one.

    asked by Louis on April 21, 2010
  53. CHEMISTRY

    For the reaction 3 O2(g) reverse reaction arrow 2 O3(g) If the equilibrium mixture is analyzed and [O2(g)] is found to be 3.77*10-2 M, what is the concentration of O3(g) in the mixture?

    asked by Jane on November 22, 2010
  54. Chemistry

    The equilibrium constant, Kc is 3.2 x10 -34 at 25C for the reaction 2 HCl(g) H2(g) + Cl2(g). what is The equilibrium expression, Kc for the reaction

    asked by Donna on April 27, 2011
  55. chemistry

    predict the reaction, if any, that would occur if AgNo3 and KBr were mixed would any reaction occur if HBr was then added?

    asked by demar watson on November 26, 2013
  56. world geo

    in 1971 the eastern part of pakistan became: A)maldives b)bangladesh C)kashmir D)** bhutan the highest concentrations of populations in south asia are found A)in the great indian desert B)in nepal C)on the deccan plateu D)**on the ganges plain

    asked by henry on September 23, 2009
  57. Chemistry

    In the haber process for the preparation of NH3 which is given by the equilibruim? N_2_(g)+3H_2_(g) 2NH_3_(g)...... delta H= -92.38kJ State the conditions of concentrations and temperture that will favor production of NH_3_? Please help! would it be high

    asked by lisa on September 26, 2011
  58. science very urgent help?

    Susan has heard that taking an over-the-counter ‘energy’ pill, which contains as much caffeine as a strong cup of coffee, makes people feel alert and ‘speedy’. She wonders if taking this pill will make a difference to the reaction times of people

    asked by sam on December 13, 2013
  59. chemestry

    For the following reaction, 5.70 grams of hydrogen gas are mixed with excess nitrogen gas. The reaction yields 22.6 grams of ammonia. (1) What is the theoretical yield of ammonia ? ____ grams (2) What is the percent yield for this reaction ? ____ %

    asked by cristy on November 17, 2010
  60. chemistry

    Can the half cell electrochemistry experiment using a pH meter and aqueous solutions of Cu, Cu2+ and Ag and Ag+ be used to measure even lower concentrations, such as 10^-23 mol of Cu2+ or a single free copper ion in solution? Please explain.

    asked by Jude on May 5, 2011
  61. Bioelectricity

    Na equil-v: Only sodium may cross a membrane separating two compartments. At a temperature of 28∘C, the concentrations of sodium ions are: intracellular: 100 extracellular: 485 What is the equilibrium potential? Give a numeric answer within 1%, in mV.

    asked by B on February 19, 2013
  62. Bioelectricity

    K equil-v: Only potassium may cross a membrane separating two compartments. At a temperature of 30∘C, the concentrations of potassium ions are: intracellular: 280 extracellular: 110 What is the equilibrium potential? Give a numeric answer within 1%, in

    asked by B on February 19, 2013
  63. chemistry

    What are the equilibrium concentrations of H+,OH- ,(HSO3)-, (SO3)2- and Na+ in the solution that results from combining 50.0 mL of 0.200 M NaHSO3 with 50.0 mL of 0.600 M Ba(OH)2 ? Ka1 = 1.5 x 10-5 and Ka2 = 1.0 x 10-7 for H2SO3 does it matter that Ba(OH)2

    asked by alexis on August 4, 2008
  64. chemistry

    What would be the concentration of dinitrogen pentoxide after 6.00 X 10(2) seconds and how long would it take for the concentration of N2O2 to decrease to 10.0% of its initial value in the following equation... N2O5 to NO2 and O2 initial concentration is

    asked by Chris on January 21, 2013
  65. chemistry

    1)The reaction of methane and oxygen yields carbon dioxide gas and water. The unbalanced reaction is as follows: CH4(g) + O2(g)CO2(g) + H2O(g) A. If 0.718 grams of methane are reacted, how many grams of water vapor are produced? B. If 1.621 grams CO2 are

    asked by eng on January 8, 2010
  66. Chemistry

    How many milliliters of O2 are consumed in the complete combustion of a sample of hexane, C6H14, if the reaction produces 325 mL of CO2? Assume all gas volumes are measured at the same temperature and pressure. The reaction is 2C6H14(g) + 19O2(g) ->

    asked by Luke on July 8, 2014
  67. Chem

    A 7.50g sample of aluminum is placed in 250.0 mL of 1.80 mol/L sulfuric acid. The reaction is not nearly as vigorous as expected and produces only 427 mL of gas at 27 degrees celsius and 480 kPa pressure. Calculate the percentage Yield of the reaction

    asked by Tuan on February 15, 2016
  68. Grd.10 Science

    So i did a science lab today, and i am supposed to come up with the skeleton equation for it The chemical reaction is decomposition (starting with one compound that will break off into 1 or more compounds after reaction) This is what i have so far : Cu

    asked by Dawn on November 6, 2009
  69. chemistry lab (college level)

    So, this is going to be more like 2 or 3 questions. Here goes. First, what is the net-ionic reaction for Fe (III) + K4Fe(CN)6 be? I've been agonizing over this for HOURS with no answer in sight. (I don't even know what to put down as a product!) Second,

    asked by Tichele on April 10, 2011
  70. Math3(Reiny Please Help)

    An object on Earth falls with an acceleration of a=9.81 m/s^2. A function exists between the height from which the object falls, the initial velocity of the object and the time the object spends in the air. h(t)= Vt + at^2 V=initial velocity. T= time. A=

    asked by Heaven on May 17, 2016
  71. chemistry

    a 0.2000 grams sample of aluminum metal is added to a solution containing 1.0000grams of an unknown compound made of platinum and chloride ion. the reaction results in the formation of aluminum chloride and platinum metal. when the reaction is complete,

    asked by Anonymous on March 3, 2014
  72. Chemistry Dr. BOB

    I don't get it!! In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2. Write a combustion reaction for ethanol. I need help with

    asked by Mark on October 27, 2015
  73. physics

    if you fire a ball through a pile of sand, it iwll slow ddown in the sand and emerge at less that its initial speed. But when light shines pn a pane of glass, even though it slows down inside, its speed upon emerging is the same as its initial speed.

    asked by Anonymous on April 21, 2010
  74. introductory to physics

    A pendulum bob is released from some initial height such that the speed of the bob at the bottom of the swing is 4.0 m/s. The acceleration of gravity is 9.81 m/s 2 . What is the initial height of the bob? Answer in units of m

    asked by alicia on March 5, 2014
  75. physics

    a 0.5 kg ball is thrown upward with an iniatial speed of 10 m/s, what is the initial kinetic energy of the ball and the total mechanical energy assuming initial potential energy is zero.

    asked by flor on May 22, 2017
  76. Physics

    A pendulum bob is released from some initial height such that the speed of the bob at the bottom of the swing is 1.5 m/s. The acceleration of gravity is 9.81 m/s 2 . What is the initial height of the bob? Answer in units of m

    asked by Ted on February 5, 2013
  77. Chemistry

    HCl (aq) + NaOH (aq) -> NaCl (aq) + H2O (l) Will the neutralisation reaction be endothermic or exothermic? Hint: think about the net ionic equation. So, taking the hint, I got: OH- + H+ -> H2O Not sure how that helps, and now I'm stuck; how would I figure

    asked by A Canadian on February 11, 2013
  78. Chemistry

    What causes a reaction to be spontaneous? Answer by answering each part a) (1 point) What is definition of spontaneous reaction?b) (1 point) What is Gibbs free energy?c) (1 point) How is Gibbs free energy related to a spontaneous reaction?d) (1 point) What

    asked by Adam on May 17, 2016
  79. Chemistry

    2. Aluminum metal reacts with zinc(II) ion in an aqueous solution by the following half-cell reactions: Al(s) → Al3+(aq) + 3e− Zn2+(aq) + 2e− → Zn(s) a. Predict the potential of the cell under standard conditions. (4 points) b. Predict whether the

    asked by Morgan on October 22, 2014
  80. chem!

    Calculate the heat of reaction for the incomplete combustion of 67.0g propane producing carbon monoxide gas and water vapour. how would I go about and do this question? What are you studying? Do you know how to use the thermodynamic tables (delta Ho, etc).

    asked by Chem on May 14, 2007
  81. chemistry(check my work)

    The initial pressure for the compounds involved in the reaction displayed were determined to be P(SO2(g)) = 0.5932 atm, P(O2(g)) = 0.4886 atm, P(SO3(g)) = 0.09287 atm. Calculate the value of the equilibrium constant (Kp) at 1000 K if the equilibrium

    asked by bme1 on April 6, 2010
  82. Chemistry

    What is the net chemical equation of: Reaction 1: 3.3 kcal/mol+glucose+Pi --> glucose-6-phosphate+H2O Reaction 2: ATP+H2O --> ADP+Pi+7.3 kcal/mol AND Calculate the amount of energy released in the coupled reaction. energy released: ____kcal/mol

    asked by HELP! on December 3, 2012
  83. Chemistry

    HELP£¡ can someone find identify one chemical reaction that C4H4O4 is involved in. Or the synthesis of the compound? C4H4O4 is a formula that applies to both maleic and fumaric acid. A synthesis reaction of reaction of maleic acid is: Maleic acid

    asked by Qing on December 18, 2006
  84. chemistry

    Consider the following reaction. 2KClO3(s) → 2KCl(s) + 3O2(g) a. How many grams of KCl are produced from the complete reaction of 2.16 mol of KClO3? 161g b. How many grams of KCl are produced from the complete reaction of 52.7 g of KClO3? 32.1 g

    asked by krystal on February 13, 2012
  85. chemistry BOB

    is this the answer to B ) CH3CH2OH + 3O2 → 2CO2 + 3H2O In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and ethanol are "burned" to water vapor andCO2. Write a combustion

    asked by Mark on October 28, 2015
  86. physics

    Calculate the range of the projectile using the initial speed and angle. Use g = 9.8m/s your calculation. Initial speed is 18m/s Angle is 75 Help please !!

    asked by jacob on April 14, 2015
  87. organic chem

    what are some chemical reasons that might have resulted in a lower yield of a product on a grignard reaction. Something related to grignards being very reactive and since its the limiting reagent, any reaction that destroys it will result in a hit in

    asked by Yoo on February 28, 2011
  88. chemistry

    Consider the following reaction at equilibrium: 2NH3 (g) N2 (g) + 3H2 (g) ΔH° = +92.4 kJ Le Cha ^ telier's principle predicts that increasing the temperature will shift the reaction to the. a) stays same b)leftc)none d)right i was told right by some

    asked by richy on November 20, 2010
  89. Chemistry

    The Energy from glucose is obtained from the oxidation reaction C6H12O6 + 6O2 --> 6CO2 + 6H2O How would a similar reaction look for Sucrose? I am trying to find an equation about how the body uses a compound, in this case sucrose. I'm just not sure how

    asked by James on March 23, 2012
  90. Organic Chemistry

    When performing a dehydration reaction, what may be done to drive the equilibrium to the right: A. removal of the product as it is formed B. increasing the concentration of the solvent C. doubling the concentration of the acid catalyst D. lowering the

    asked by nilee on March 6, 2009
  91. chemistry

    For the reaction Al (s) + 3 HCl (aq) à AlCl3 (s) + ₃/₂ H2 (g), it was observed that when 4.00 g of aluminum reacted with excess HCl, exactly 30.0 kJ of heat were released. The DHo for this reaction is a) – 91.3 kJ b) – 120 kJ c) – 202 kJ d) –

    asked by Kumar on January 24, 2012
  92. chemistry

    Consider the combustion reaction: C3H8 (g) + 5 O2(g) ---> 3 CO2(g) + 4H2O(g), where triangle symbol H= - 531 kcal/mol. If 6.70 x 10 to the 4th kcal of energy is released in the reaction, How many grams of oxygen were consumed

    asked by sukanya on February 17, 2011
  93. chem class

    Consider the following reaction at equilibrium: 2NH3 (g) N2 (g) + 3H2 (g) ΔH° = +92.4 kJ Le Cha ^ telier's principle predicts that increasing the temperature will shift the reaction to the. a) stays same b)leftc)none d)right i was told right by some

    asked by richy on November 20, 2010
  94. 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
  95. chemistry

    A laboratory instructor gives you a test tube containing Ag+ ,Ba 2+ , and Cu 2+ ions. Devise a reaction scheme that would allow you to selectively precipitate each of these ions. Write a balanced net ionic equation for each precipitation reaction.

    asked by steven on March 17, 2014
  96. Chemistry

    What type of reaction occurs when potassiumbromide solution is mixed. With lead(II) acetate solution? Gas evolution, oxidation reduction, precipitation, acid-base neutralization, or no reaction

    asked by Coug on January 8, 2010
  97. 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
  98. Chemistry (redox reaction)

    Which reaction is a redox reaction? 1. HCI+H2O=H3O^+ +CI^- 2. H2SO4+2KOH=K2SO4+2H2O 3. CH4+2O2=CO2+2H2O 4. Fe^2+ +2OH^- =Fe(OH)2 I chose number 3, is this correct?

    asked by Summer on April 5, 2018
  99. physics

    I need help understanding these, please. Thanks! 1. A 2 kg body moves with constant velocity when a force of 10 N is applied. What is the coefficient of kinetic friction between the table and the body? (Would I use F=m*g for this??) 2. Which of the

    asked by Ellie on October 4, 2015
  100. chemistry

    The equilibrium constant for the reaction Cu3(PO4)2(s)    3 Cu2+(aq)  +  2 PO43–(aq) is K = 1.40 x 10–37.  Suppose that a beaker is filled to 1 L with a solution containing [Cu2+] = [PO43–] = 10.0 nM, and 300.0 g Cu3(PO4)2 . Which of

    asked by jess on June 8, 2016