1. physics

    A ball thrown vertically upward is caught by the thrower after 2 seconds. Find the initial velocity of the ball and the maximum height the ball reaches???!!

    asked by mb on September 18, 2008
  2. Physics

    The ball is thrown vertically upwards from the height of 14.1 meters. It takes 3 seconds till the ball hits the ground. What is the initial speed of the ball?

    asked by Luise on September 13, 2012
  3. physics

    A baseball player slides into third base with an initial speed of 7.75 m/s. If the coefficient of kinetic friction between the player and the ground is 0.45, how far does the player slide before coming to rest?

    asked by john on July 13, 2015
  4. Physics

    On a frozen pond, a person kicks a 10.0 kg sled, giving it an initial speed of 12.2 m/s. How far does the sled move if the coefficient of kinetic friction between the sled and the ice is .10?

    asked by Nicole on December 11, 2009
  5. Physics

    Hello, my problem is the next one: There are three objects that are launched at the Same time But with different angles( they describe proyectile motion ) . All the objects got the Same maximun height. My question is: Is the Initial velocity the Same for

    asked by Arthur on October 11, 2016
  6. Physics

    A baseball player slides into third base with an initial speed of 3.8m/s. If the coefficient of kinetic friction between the player and the ground is 0.40, how far does the player slide before coming to rest?

    asked by Marissa on February 11, 2015
  7. Science

    A car starts from an initial velocity of 10m/s and accelerates at 2.5m/s².how long will it take the car to reach a speed of 40m/s.. How far doea the car travel during this time?

    asked by Anonymous on November 16, 2016
  8. Physics

    A baseball player with a mass of 79 kg slides into homeplate. The coefficient of kinetic friction between the player and the ground is μk = 0.632. If the player comes to rest after 1.04 s, what is his initial speed?

    asked by danny on March 4, 2015
  9. physics

    A mass of 2kg was thrown straight up with a speed of 15m/s. (a) find the initial KE (b) how high does the mass rise? (c) what is the GPE of the mass at the highest point?

    asked by Madi on March 15, 2011
  10. physics

    An object starts sliding up a plane tilted at an angle of alpha = 5.0◦ to the horizontal. The object’s initial speed is v = 2.0m/s. How far from the start point does the object come to a stop if μK = 0.20?

    asked by Sandhya on November 7, 2008
  11. chem

    the volume of 0.220 mol of an ideal gas at 34°C is increased isothermally from an initial volume of 12.0 L. If the final volume is 21.5 L, calculate the entropy change for the process.

    asked by hannah on April 2, 2013
  12. physics

    object a does a freefall motion from an 80-m building and object b thrown upward from the base at the same time. they collide after 2s. find the initial velocity of object b. height is 80 m.

    asked by flay on January 9, 2013
  13. physics

    a man fires a rock of a sling shot upwards. the rock has initial velocity of 15m/s. How long will it take for the rock to reach its highest point??

    asked by lenex purre on October 9, 2014
  14. physics

    You accelerate your 1500 Kg car from 2 m/s to 12 m/s in 2 seconds. How do you determine the cars acceleration initial momentum final momentum change in momentum the force required to do this?

    asked by Kelley on January 11, 2016
  15. Physics

    A tennis ball is thrown up with an initial speed of 22.5m/s. It is caught at the same distance above the ground. A) how high does the ball rise B) how long does the ball remain in the air?

    asked by Sandara on January 23, 2014
  16. physics

    A man fires a rock of a slingshot directly upward.The rock has an initial velocity of 15m/s.How long will it take for the rock to return to the level he fired it at?

    asked by Shazz on April 4, 2013
  17. Science

    Maddy hits a golf ball up into the air with an initial velocity of (20m/s, 49m/s). Record the horizontal velocity, & vertical velocity at each second for 10 seconds.

    asked by Anonymous on November 15, 2012
  18. Chemistry

    1) The formation of water is represented by the following equation : 2H2(g) + O2(g) -> 2H2O(g) a.What is the limiting reactant if 4 mol of oxygen reacts with 16 mol of hydrogen? b.What amount (in moles) of water is produced in this reaction? 2) . Sliver

    asked by IMPO QUESTION on December 20, 2012
  19. Fly Ball Lab - Projectile Motion Please HELP FAST!

    In this lab, you will perform graphical and mathematical analysis on a tennis ball that is struck by a bat. The data required for this lab is the horizontal displacement of the ball from the location where it was hit to the point where it first strikes the

    asked by Amanda on November 13, 2013
  20. Physics

    A 24.5N brick slides from rest down an 11.2m, 53.0 degree ramp with a meu=0.45. At the bottom, it strikes a stationary 36.8N brick, and then the two slide on together. How far will the two slide on a level surface with a coefficient of friction of 0.080?

    asked by Lisa on June 14, 2007
  21. chemistry

    I cannot figure out how to work this stoichiometry problem with the given equation: Mg+2HCl-->MgCl2+H2 What volume of hydrogen is produced from the reaction of 50.0g of Mg and the equivalent of 75g of HCl What do you not understand about it? It is a

    asked by Carter on February 5, 2007
  22. Chemistry

    Question: you have a clear, colorless aqueous sample in a beaker that contains either CO2^-2(aq) or C^-1(aq) or a mixture of both ions. the following aqueous reagents are available: NaCl, HNO3, and AgNO3. describe a procedure that will allow the

    asked by Anonymous on May 13, 2009
  23. math

    how do you calculate theoretical yield of something? I don't know where to find the formula You go to the balanced chemical equation, and look at the mole ratio between the reactants and products. The theoretical yield is the value calculated from

    asked by james on January 31, 2007
  24. CHEMISTRY...

    1. Balance the reaction below, then use it to answer the following questions. C2H2(g)+O2(g)-->CO2(g)+H2O(l) a) How many grams of oxygen are needed to make 4.84 moles of water? Is the correct answer 387 grams of O2? b) How many grams of water will be

    asked by Anonymous on January 13, 2013
  25. can someone proof read my work thanks!

    If the assassination of Archduke Francis Ferdinand was just a trigger why did everyone wait a whole year to do anything? If war was going to happen don’t you think it was given many chances to happen before the assassination? War would have not been

    asked by debate paper World war one! on March 12, 2007
  26. Accounting

    The City of Jamestown has agreed to acquire a new city maintenance building under a capital lease agreement. At the inception of the lease, a payment of $100,000 is to be made; nine anual lease payments, each in the amount of $100,000, are to be made at

    asked by Jill on February 11, 2010
  27. College Chemistry

    A buffer solution contains 0.120M acetic acid and 0.150M sodium acetate. a. How many moles of acetic acid and sodium acetate are present in 50.0 ml of solution? b. if we add 5.55 mL of 0.092M NaOH to the solution in part (a) how many moles of acetic acid ,

    asked by Elizabeth on November 10, 2010
  28. physics

    a body is thrown vertically upward return to the earth in 3sec. (a)what was the initial velocity of the body (b)what height did the body reach? neglect the resistance of air.

    asked by pavatharani on June 14, 2011
  29. chemistry

    the concentration of a chemical degrades in water according to order kinetics. the degradation constant is 0.2 day^-1. if the initial concentration is 100.0 mg/L, how may days are required for the concentration to reach 0.14 mg/L?

    asked by Maria on January 15, 2011
  30. Physics

    An 81-kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is 0.49. (a) What is the magnitude of the frictional force? (b) If the player comes to rest after 1.6 s, what was his initial velocity?

    asked by Litany on November 13, 2009
  31. physics

    Doug hits a hockey puck, giving it an initial velocity of 6.0 m/s. If the coefficient of kinetic friction between ice and puck is 0.032, how far will the puck slide before stopping? A) 19 m B) 25 m C) 37 m D) 57 m E) 68 m

    asked by anonymous on June 14, 2010
  32. chemistry

    Water (2690 ) is heated until it just begins to boil. If the water absorbs 5.29×105 of heat in the process, what was the initial temperature of the water?express answer in Celsius.

    asked by Kyle on September 21, 2010
  33. Physics

    A baseball is projected horizontally from the top of a building with an initial speed of 15 m/s. The ball strikes the ground 25 m from the base of the building. a. How long will it be in the air? b. How tall is the building?

    asked by Tsunayoshi on November 2, 2013
  34. Physics

    A tennis ball is thrown straight up with an initial speed of 20.0 m/s. It is caught at the same distance above the ground. How high does the ball rise (m), and how long does the ball stay in the air (s)?

    asked by James on September 2, 2008
  35. Physics

    An 81 kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is .49. a) what is the magnitude of the frictional force? b) If the player comes to a rest after 1/6s, what was his initial velocity?

    asked by Anonymous on January 17, 2013
  36. physics

    A 200g Nerf dart is shot from a dart gun with a kenetic energy of 3.60J. What was the initial speed of the dart? >>> change g into kg Formula(i think) is: Ek=1/2 mv2 Helppp?

    asked by chyanne on April 30, 2008
  37. physics

    a stone is from the top of a tower 300m high and at the same time another stone is projected vertically upward with initial velocity 75m/s. calculate when and where the two stone meet

    asked by irna on April 23, 2011
  38. physics

    a stone is from the top of a tower 300m high and at the same time another stone is projected vertically upward with initial velocity 75m/s. calculate when and where the two stone meet

    asked by irna on April 21, 2011
  39. physics

    ahmed throws a ball at initial velocity of 36 meter per second.assuming the ball is caught at the same height at which it was released. calculate the maximum distance the ball can reach.

    asked by nuzhat on December 3, 2015
  40. algebra

    kathy plans to purchase a car that depreciates (loses value)at a rate of 14%per year initial cost of the car ia $21,000.which equation represents the value,v,of the car after 3 years?

    asked by harpreet on May 23, 2013
  41. Chemistry

    2A-->B+C given that the initial concentration of A is .022M and that at 69 s, the concentration of B increases to .0095M, what is the rate constant? i know I need to find the new concentration of A at 69s, but I am having trouble with findthing this. I

    asked by Val on April 1, 2010
  42. math algebra

    a diver dives from a cliff .when her centre of gravity is 46 ft above the surface of the water. her initial vertical velocity leaving the water is 9 ft per second. after how many secs does she hit the water? solve

    asked by E on March 8, 2013
  43. physics

    A man throws a ball straight up in the air with an initial speed of 24 meter per second. How long does it take for the ball to return to him? What is the maximum height of the ball above the point where it was thrown?

    asked by r on December 7, 2011
  44. physics

    A simple harmonic oscillator executes motion whose amplitude is 0.20 m and it completes 60 oscillations in 2 minutes. i) Calculate its time period and angular frequency. ii) If the initial phase is 45°, write expressions for instantaneous displacement,

    asked by meenu on March 29, 2015
  45. Physics

    A baseball is thrown from the rood of a 27.5m tall building with an initial velocity of magnitude 16.0m/s and directed at an angle of 37 degrees above the horizontal. A) Using energy methods and ignoring air resistance, calculate the speed of the ball just

    asked by Anonymous on April 9, 2013
  46. MATH HELP

    Law of Gravitation-find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is negelcted. The gravitational constant is given as G= 6.67428*10^-11 m^3 kg^-1 s^-2 Please give

    asked by AKUMA on April 28, 2011
  47. physics

    if the greatest acceleration force which may be be applied to a vehicle is numerically equal to its weight, find a the least distance and b the least time, in which the vehicle travelling on a horizontal road can be brought to rest from an initial velocity

    asked by tennesha greene on January 17, 2011
  48. Math

    You want to have $60,000 college fund in 12 years. How much will you have to deposit now under the scenario below. Assume that you make no deposits into the account after the initial deposit. An APR of 8​% compounded daily. I know how to break the

    asked by Heather on May 28, 2017
  49. Quantitative Analysis

    The dibasic compound B (pKb1 = 4.00, pKb2 = 8.00) was titrated with 1.00 M HCl. The initial solution of B was 0.100 M and had a volume of 100.0 mL. Find the pH at the following volumes of acid added and make a graph of pH versus Va; Va=0, 1, 5, 9, 10, 11,

    asked by Missy on November 14, 2012
  50. physics

    An object is thrown vertically up and attains an upward velocity of 10 m/s when it reaches one fourth of its maximum height above its launch point. What was the initial speed of the object? The acceleration of gravity is 9.8 m/s2. Answer in units of m/s

    asked by Curt on September 30, 2015
  51. Physics

    When I work this problem I get an answer different from what's given not sure why? A basketball is launched with an initial speed of 8.8 m/s and follows the trajectory shown. The ball enters the basket 0.98 s after it is launched. What are the distances x

    asked by Ben on September 14, 2014
  52. financial

    Determine the amount of money in a saving account at the end of five years, given an initial deposit of $5,000 and a 12 percent annual interest rate when interest is compunded a) annually b) semiannually c) quarterly

    asked by Anonymous on November 3, 2009
  53. physics

    a ball of mass 0.1kg is thrown vertically upwards with an initial velocity of 80m/s.calculate the potential energy (I) half way up (ii) at its maximum height.what is the kinetic energy as it leaves the ground

    asked by stephen on March 13, 2016
  54. math

    June made an initial deposit of $5000 in an account for her son. Assuming an interest rate of 7% compounded quarterly, how much will the account be worth in 11 years? Round to the nearest cent. Can someone help me with this problem?

    asked by Aleah on July 25, 2009
  55. Engineering Kinematic

    The particle travels along the path defined by the parabola y=0.5(x^2). If the component of velocity along the x-axis is v=5t [m/s], determine the particle's distance from the origin and the magnitude of its acceleration when t=1s. The initial condition is

    asked by Claire on October 16, 2010
  56. Physics

    A ball is thrown straight up from the ground with an initial velocity of 30.4 m/s; at the same instant, a ball is dropped from the roof of a building 21.1 m high. After how long will the balls be at the same height? The acceleration of gravity is 10 m/s2.

    asked by Kaleigh on January 29, 2012
  57. physical

    A basketball player who is 2.0m tall is standing on the floor 10.0m from the basket,If he shoots the ball at a 40.0¤ angle witi the horizontal,at what initial speed must he throw so that it goes through the hoop without striking the backboard?The basket

    asked by yenebeb on March 22, 2013
  58. physics

    a body of mass 2kg starting from origin t=0,has an initial velocity of 5m/s along x-axis and it subjected to constant force of 4N in y-direction in a gravity free space.the distance from origin after 4 seconds is nearly equal to

    asked by hari on September 7, 2016
  59. physics

    a baseball was launched from 1.5 m above the ground. the ball was caught at a position 4.5m above the ground with a speed of 28m/s moving at a angle of 30 degrees below horizontal: find initial velocity - time of flight - range

    asked by al on September 11, 2013
  60. Physics

    A pistol is shot upwards at an angle of 37 degrees above horizontal, with an initial velocity of 375m/s. What height does it reach? What is its horizontal range? (I pretty much know what formulas to use, but I'm not quite sure HOW to use them.. Also you

    asked by Devynn Austin on October 7, 2014
  61. chem

    The dibasic compound B (pKb1 = 4.00, pKb2 = 8.00) was titrated with 1.00 M HCl. The initial solution of B was 0.100 M and had a volume of 100.0 mL. Find the pH at the following volumes of acid added and make a graph of pH versus Va; Va=0, 1, 5, 9, 10, 11,

    asked by joshua on January 22, 2018
  62. physics

    a baseball was launched from 1.5 m above the ground. the ball was caught at a position 4.5m above the ground with a speed of 28m/s moving at a angle of 30 degrees below horizontal: find initial velocity - time of flight - range

    asked by al on September 11, 2013
  63. physics

    when you see a traffic light turn red you apply the brakes until you come to a stop. if your initial speed was 12 m/s, and you were heading heading due west, what was your average velocity during braking? Assume constant deceleration.

    asked by taylor on November 17, 2011
  64. Physics

    A ball is thrown upward from the ground with an initial speed of 21.5 m/s; at the same instant, a ball is dropped from rest from a building 17 m high. After how long will the balls be at the same height? The acceleration of gravity is 9.81 m/s2. Answer in

    asked by Anonymous on October 6, 2010
  65. Physics

    If a drummer at a gig hits his a drum that has a diameter of .2m with a stick that has a mass of 0.5kg at .03m from the center. What percentage radial region is impacted with a force twice as great as the initial impact force?

    asked by Sam on December 20, 2012
  66. Science

    A bullet blasts from the barrel of a gun upward in the vertical direction with an email initial speed of 700m/s .Find the maximum altitude reaches by this bullet and the time needed the reach it.

    asked by Anonymous on June 21, 2017
  67. Physics

    A golf ball is struck with a five iron on level ground. It lands 91.4 m away 4.20 s later. What was (a) the direction and (b) the magnitude of the initial velocity? angle=tan-1(Ry/Rx) for direction R=(Rx^2+Ry^2)^(1/2) I cannot figure out the variables and

    asked by Please Help Understand on June 16, 2016
  68. physics

    a baseball was launched from 1.5 m above the ground. the ball was caught at a position 4.5m above the ground with a speed of 28m/s moving at a angle of 30 degrees below horizontal: find initial velocity - time of flight - range

    asked by al on September 11, 2013
  69. Chemistry

    How many moles of propane are expected from the complete reaction of 82.8 g of propene? How many grams of propane are expected from the complete reaction of 101 g of propene? Kyle-- Here is a problem I worked last night for Kira (about half way down the

    asked by Kyle on April 6, 2007
  70. Chemistry

    If 5.86g of glucose are reacted and 1.44L of CO2 gas are collected at 293K and .984atm. What is the percent yield of the reaction? C6H1206 -> 2C2H5OH + 2CO2

    asked by Andrea on October 17, 2010
  71. Chemistry

    Whats the percent yield in the reaction: P+5C2H5OH+ 5/2 I2 -> 5C2H5I + H3PO4 + H2O if you have 4.14g phosporous, 27.5g ethanol, 63.5g iodine, and you get 73g ethyliodine (C2H5I)

    asked by Anonymous on February 6, 2013
  72. chemistry

    Use the reaction shown to calculate the mass of iron that must be used to obtain 0.500 L of hydrogen at STP: 3Fe(s) + 4H2O(l) pr029-1.jpg Fe3O4(s) + 4H2(g

    asked by jason on January 14, 2013
  73. chemistry

    The redox reaction below occurs in acidic solution. Balance it with the smallest whole number coefficients and determine the coefficient for H+. MnO4-(aq) + HNO2(aq) ---> Mn2+(aq) + NO3-(aq)

    asked by Megan on November 1, 2008
  74. Chemistry

    Nitrogen reacts with powdered aluminum according to the reaction: 2Al(s)+N2(g)→2AlN(s) How many liters of N2 gas, measured at 892 torr and 98 ∘C, are required to completely react with 17.8 g of Al?

    asked by Leslie on May 5, 2018
  75. Chemistry

    Consider the reaction: 2CH4(g) + 3O2(g) + 2NH3(g) --> 2HCN(g) + 6H2O(g) If 203.5 g NH3 is reacted with excess CH4 and O2, what mass in grams of HCN can be produced?

    asked by D on April 30, 2017
  76. Chemistry

    What mass of hydrogen gas is produced when 3.0 mol of iron react with excess hydrochloric acid according to the reaction below 2Fe + 6HCl --> 2FeCl3 + 3H2

    asked by Mary on November 8, 2016
  77. Chemistry

    What mass of hydrogen gas is produced when 3.0 mol of iron react with excess hydrochloric acid according to the reaction below 2Fe + 6HCl --> 2FeCl3 + 3H2

    asked by Mary on November 8, 2016
  78. chemistry

    a solution of lead(2)nitrate is added to hydrochloric acid. A precipitate is formed in a double displacement reaction Question:how to balance this equation problem

    asked by james on November 1, 2011
  79. Chemistry

    Calculate the number of liters of hydrogen gas at STP that could be produced by the reaction of 4.80g of magnesium with excess hydrochloric acid. Mg+HCl=MgCl2+H2

    asked by Makenna on January 31, 2017
  80. chemistry

    What happens to the concentration of NO(g) when the total pressure on the equilibrium reaction 3NO2(g) + H2O 2HNO3(aq) + NO(g) is increased (by compression)? 1. increases 2. remains the same 3. decreases 4. Unable to determine

    asked by luke on April 3, 2012
  81. chemistry

    Which one of the gollowing represents the theoretical yield, in grams, of precipitate for the double displacement reaction if 25.0 mL of 1.75 M aqueous calcium nitrate is added to 15.0 mL of 1.50 M sodium phosphate?

    asked by Tammy on October 15, 2010
  82. Chemistry answer check

    What quantity of heat is required to produce 5 mol of oxygen gas by this reaction? HgO(s) → Hg(l) + ½ O2(g), ΔH = +90.7kJ I calculated 90.7*5, but my online homework says its wrong how do I calcuate this?

    asked by Mary on June 26, 2013
  83. chemistry

    "a test liquid has a density of 1.1g/ml.. when u pour some of it into a cup of water what will happen asuming thar their nature are such that they don't mix and that their is no chemical reaction between the two substance? please help !!!

    asked by sam on January 21, 2009
  84. Chemistry

    What is the reaction that occurs at a silver anode of a voltaic cell? (Include states-of-matter under the given conditions in your answer.) I got: Ag(s) --> Ag^{2+}(aq) + 2 e^- But my hw program isn't accepting this. What am I doing wrong?

    asked by Anonymous on April 12, 2018
  85. chemistry

    what is the geometry of the molecular compound formed by the reaction of sulfur with hydrogen? linear angular trigonal planar tetrahedral please explain the correct answer

    asked by Lisa on February 23, 2014
  86. chemistry

    Using the following thermochemical data, what is the change in enthalpy for the following reaction? 2H¿(g) + 2C(s) + O¿(g) d C¿HOH(l)? C2H5OH(l) + 2O2(g) d 2CO2(g) + 2H2O(l),  DH = -875 kJ C(s) + O¿(g) d CO¿(g),  DH = -394.51 kJ H2(g) + ½O2(g) d

    asked by caleb on December 9, 2014
  87. Chemistry

    What mass of hydrogen gas is produced when 3.0 mol of iron react with excess hydrochloric acid according to the reaction below 2Fe + 6HCl --> 2FeCl3 + 3H2

    asked by Mary on November 8, 2016
  88. chem

    consider the chemical reaction, 2Al + 3Cl2 -> 2AlCl3. here, 212.7 g of chlorine can produce a maximum of 266.66 g of AlCl3 (molar mass of Al = 26.98 g and Cl = 35.45 g) true or false

    asked by bekah on October 5, 2014
  89. chemistry

    What is the minimum amount of 5.0M H2SO4 necessary to produce 24.1g of H2(g) according to the following reaction? 2Al(s) + 3H2SO4(aq) produces Al2(SO4)3(aq)+3H2(g). Express your answer using two significant figures.

    asked by Anonymous on October 2, 2010
  90. chemistry

    a 3.00g sample of baking soda is heated and decomposes according to the reaction below. Calculate the theoretical yield in grams for each of the three products Na2Co3. H2O, CO2

    asked by Chloe on June 17, 2012
  91. Chemistry

    5.2 grams of magnesium metal are place in 400.0 mL of 1.0 M hydrochloric acid. The balanced equation for the reaction is: Mg + 2HCl = MgCl2 + H2. How many moles of H2 gas were produced?

    asked by Heidi on June 9, 2014
  92. Organic Chem

    adding one equivalent of sulfuric acid to 2,4-hexadiene gives 2 possible products. Give the structure and write all steps in the reaction mechanism that explains how each product is formed

    asked by Lisa on August 4, 2013
  93. chemistry

    Write the equation for the decomposition of HI, knowing that the reaction requires 9.4 kj/mol of hydrogen forming. If 100.0 kj of energy are added, how many grams of iodine will form.

    asked by Bob on May 7, 2012
  94. ap

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

    asked by cheri on October 2, 2012
  95. Chemistry

    The overall hydrogen burning reaction in stars can be represented as the conversion of four protons to one alpha particle. Use the data for the mass of H-1 and He-4 to calculate the energy released by this process.

    asked by Sandy on April 10, 2014
  96. chemistry

    Balance the reaction below in acidic conditions: IO3- + I- --> I2 What volume of 0.352 M HCl is needed to produce 2.48x10-3 moles of iodine, I2, with an excess of KlO3 and Kl?

    asked by Sarah on December 14, 2010
  97. biology

    Can someone please list a few ideas to conduct an experiment on how the surface area affects the reaction rate. Hydrochloric acid can be tested as a catalyst with what sort of objects?

    asked by michael on April 18, 2010
  98. science

    The combustion of acetylene in the presence of excess oxygen yields carbon dioxide and water: 2C2H2 (g) + 5O2 (g) ¨ 4CO2 (g) + 2H2O (l) The value of ƒ¢So for this reaction is __________ J/K.

    asked by lauren on August 1, 2010
  99. Chemistry

    Balance the following equations for a half reaction that occurs in a acidic solution A) ClO3- --> Cl2 B)H2BO3- -->BH4- C) MnO4- + HNO2 -->NO3- +Mn2+

    asked by Anonymous on November 19, 2012
  100. Chemistry

    What is the total volume of gases produced at 819 K and 1. atm pressure when 320 g of ammonium nitrite undergoes the following decomposition reaction? NH4NO2 --------> N2(g) + 2H2O(g)

    asked by Sarah on November 14, 2012