1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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
  24. 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
  25. 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
  26. 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
  27. 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
  28. 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
  29. 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
  30. 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
  31. 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
  32. 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
  33. 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
  34. 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
  35. 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
  36. 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
  37. 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
  38. 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
  39. 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
  40. 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
  41. 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
  42. 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
  43. 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
  44. science

    write balanced equation showing the reaction occurs when lead is added to a solution containing a mixture of aqueous silver nitrate and copper(ii)sulfate

    asked by saeed mohmoud on December 31, 2016
  45. 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
  46. 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
  47. 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
  48. Chemistry

    what mass of nitrogen dioxide (8NO2) will form by reaction of 3.50 mole of perchloric acid (13HClO4) with excess methylamine (8CH3NH2)? Answer is 99.1 g. How do you work this?

    asked by Michelle on November 7, 2012
  49. 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
  50. Science

    Equal Masses of phosphorus and chlorine react according to the follow equation. 2P+3Cl2=2PCl3 Which reagent is in excess and what percentage of it will remain at the end of the reaction

    asked by H on May 9, 2011
  51. 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
  52. 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
  53. 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
  54. 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
  55. 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
  56. chemistry

    Given the following reaction and enthalpy change, calculate the amount of heat for converting 100.4g of liquid water (18.02g/mole) to a vapor? delta H= +44kJ

    asked by Teresa on November 3, 2011
  57. chemistry

    The following redox reaction occurs in basic aqueous solution. When balanced with the smallest whole number coefficients, what is the coefficient for OH-(aq)? Mn(OH)2(s) + MnO4-(aq) = MnO42-(aq). 1. ) 2 2. ) 3 3. ) 4 4. ) 6 5. ) 8 the answer i got was

    asked by edward on November 8, 2009
  58. Chemistry 12

    given the reacting system: H2 (G) + I2(G) ---> 2HI(g) Keq= 64 Equal moles of H2, I2, and HI are placed in a 1.0 L container. Use calculations to determine the direction the reaction will proceed in order to reach equilibirum

    asked by Patrick on December 7, 2012
  59. science

    chemical reaction in cells that needs oxygen to release energy and produce carbon dioxide and water as waste 1)breathing 2)exhaling c)inhaling d)respiration

    asked by selena on May 10, 2011
  60. Chemistry 12

    given the reacting system: H2 (G) + I2(G) ---> 2HI(g) Keq= 64 Equal moles of H2, I2, and HI are placed in a 1.0 L container. Use calculations to determine the direction the reaction will proceed in order to reach equilibirum

    asked by Patrick on December 7, 2012
  61. 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
  62. 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
  63. chemistry

    The following redox reaction occurs in basic aqueous solution. When balanced with the smallest whole number coefficients, what is the coefficient for OH-(aq)? Mn(OH)2(s) + MnO4-(aq) = MnO42-(aq). - after doing the question i got 1..but i don't know if im

    asked by John on November 7, 2009
  64. 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
  65. 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
  66. 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
  67. 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
  68. 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
  69. Gr 12 chemistry

    Given the equation: 6C6H12O6+O2= 6CO2+ 6H2O How many moles of carbon dioxide will be formed upon the complete reaction of 24.1 grams of glucose with excess oxygen gas

    asked by Avery on September 23, 2015
  70. science

    6. identify the action-reaction pairs of forces for the following situations: (a) you step off a curb. (b) you pat your tutor on the back (c) a wave hits a rocky shore.

    asked by sophia on February 3, 2011
  71. science

    Represent this reaction with balanced chemical equation. Disilane gas (Si2H6) undergoes combustion to form solid silicon dioxide and water.

    asked by Shane on November 24, 2012
  72. chemistry

    CH3CH2CH=CHCH3 --KMnO4-> Include all steps of reaction, any additional reagents/conditions needed and the products formed. ive been stuck on this for hours need help please

    asked by CHRIS on November 13, 2012
  73. Chemistry

    5.00 g of (Zn) was added to 0.800 moles of nitrate ion in acidic media. Calculate the volume of (NO) gas collected at STP. Zn(s) + No3^-(aq) ---------> ZN^2+(aq) + NO(g) (Must balance the reaction first). Thank you.

    asked by Dalal on May 13, 2018
  74. 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
  75. Chemistry Help Please

    Using standard thermodynamic data from Appendix L of your text, calculate the equilibrium constant at 298 K for the following chemical reaction: CO(g) + H2O(l) CO2(g) + H2(g). Show work please! Thank you!!!

    asked by Layla on March 17, 2014
  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. Science

    Hi , I am doing a written science assessment on burning magnesium metal - one of the questions we had to answer was:explain the reaction using the big idea of energy . Would you have any clue what that means ? Thanks x

    asked by Melody Aheto on February 7, 2012
  78. chemistry

    CH3CH2CH=CHCH3 --KMnO4-> Include all steps of reaction, any additional reagents/conditions needed and the products formed. ive been stuck on this for hours need help please

    asked by CHRIS on November 14, 2012
  79. 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
  80. 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
  81. 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
  82. Organic chem

    I just need some clarification regarding SN1 reactions Okay...so a reaction with a secondary ALKYL HALiDE + CH3OH (Methanal), why is the nucleophile CH3O? why doesn't it dissociate to give CH3 and OH?

    asked by Kim on February 20, 2010
  83. 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
  84. chemistry

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

    asked by Chandler on September 30, 2011
  85. 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
  86. 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
  87. 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
  88. chemistry

    What are the partial pressures for all gases in 4NH3+O2-->4NO+6H2O that remained at the end, if the reaction took place in a sealed 50.0L tank and the final temperature is 345K?

    asked by anne on November 20, 2010
  89. chemistry

    What is the sign of the entropy change in eaech chemical reaction? a) N2O4(g)--> 2NO2(g) b) PCl3(g) + Cl2(g) --> PCl5(g) c) 2 Al(s) + 3/2 O2(g) --> Al2O3(s) d)N2(g) + 3H2(g) --> 2 NH3(g) e) S(s) + O2(g) --> SO2(g)

    asked by Kalen on April 6, 2008
  90. chemistry

    What happens to the concentration of HI(g) when the total pressure on the equilibrium reaction 2HCl(g) + I2(s) 2HI(g) + Cl2(g) is increased (by compression)? 1. increases 2. Unable to determine 3. decreases 4. remains the same

    asked by please help on March 29, 2012
  91. Chemistry 2

    Does the reaction P4(s, white) + 5 O2(g) P4O10(s) occur spontaneously at 298 K and standard state conditions? Calculate the value of capital delta S°univ. Honestly do not know where to start.

    asked by Anonymous on April 26, 2015
  92. 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
  93. 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
  94. science

    calculate the concentration for the reaction of 0.25mole 0f sodium hydroxide NaOH and water H20 solution of 250cm^3. Provide the answer in cubuc decimeter

    asked by clay on September 16, 2013
  95. 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
  96. Chem Check Please!!!

    Using standard thermodynamic data from Appendix L of your text, calculate the equilibrium constant at 298 K for the following chemical reaction: CO(g) + H2O(l) CO2(g) + H2(g). Show work please! Thank you!!!

    asked by Layla on March 17, 2014
  97. chemistry

    I need steps of solving this question Balance the oxidation reduction equation in electron ion / half reaction PbO2 + KCL = KCLO + KPb(OH)3 please best regards

    asked by h a i a e on May 24, 2010
  98. 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
  99. chemistry

    A chemist mixes 96.8 g of ammonia, NH3, with 188 L of O2 at STP. How many grams of NO will be produced? The balanced equation for this reaction is: 4NH3 +5O2 = 4NO + 6H2O

    asked by Faith on March 18, 2016
  100. Chrmistry

    How many grams of hydrogen gas be produced from the reaction of 3 g of magnesium with 4 g of hydrochloric acid. identify the limiting in excess reactants. Please help btw that's the exact question.

    asked by Lucy on March 8, 2015