1. chemistry buffers

    What molar ratio of HPO4 2- to H2PO4 - in solution would produce a pH of 7.0? Phosphoric acid (H3PO4), a triprotonic acid, has pKa values: 2.14, 6.86, and 12.4. Only one of the pKa values is relevant here. how do i know which pka value to use.. please

    asked by ron on September 9, 2012
  2. chemistry

    1 what's the Tyndall Effect and whats one example of this effect? 2) Given an unknown mixture consisting of two or more substances, how could we determine whether that mixture is a true solution, a colloid, or a suspension? 3) why is a suspension

    asked by jerson on May 4, 2008
  3. Chemistry

    Consider the following acid/base reaction CO3^2− + 2H^+ → H2O + CO2 that produces CO2 gas. 6 L of CO2 is collected at STP. What is the molarity of the HCl solution used in the reaction if 81 mL of HCl was needed?

    asked by Claire on April 12, 2016
  4. Chemistry

    85.65 grams of barium hydroxide were dissolved in 2000ml of water. 88 grams of carbon dioxide were passed through the solution producing a white precipitate. what was this white precipitate and how many grams of it were produced.

    asked by John on March 26, 2012
  5. Algebra II

    Find the exact solution to 6x^2+1= -8x by using the Quadratic Formula. Answer: -4 +/- sqrt 10 2)Which describes the number and type of roots of the equation x^2-625=0? Answer: 2 real roots 3)If g(x)=3x-8, find g[g(-4)] Answer: -20

    asked by Lucy on April 6, 2008
  6. Chemistry

    There is a current being applied to an aqueous solution fo sodium bromide. What is produced at the cathode and anode? I said that Na(s) being produced at the cathode and Br2(l) being produced at the anode. The other options are H2 and O2 for either but

    asked by Katherine on May 20, 2012
  7. social justice and ethics

    Discuss current trends affecting social welfare. Do modern trends favor the solution of social issues? What are the most effective social welfare organizations today, in your opinion, and why?

    asked by connie on March 5, 2009
  8. Chem

    Calculate the [NH4+] in solution that is 0.25 M NH3 and 0.20 M NaOH. (Kb for NH3 = 1.8 x 10-5) I set up ICE from the equation: NH3 + H20 ------NH4 + OH- I 0.25 0 0 C -x +x +x E 0.25-x x x 1.8 *10^-5 = x*x/ 0.25-x 4.5* 10^-6 = x2 took the square root to

    asked by AMI on April 6, 2010
  9. Chemistry

    Calculate the percent ionization of nitrous acid in a solution that is 0.311 M in nitrous acid (HNO2) and 0.189 M in potassium nitrite (KNO2). The acid dissociation constant of nitrous acid is 4.50 × 10-4.

    asked by Josh G. on November 17, 2012
  10. Soc.331

    Discuss current trends affecting social welfare. Do modern trends favor the solution of social issues? What are the most effective social welfare organizations today in your opinion, and why?

    asked by Barbara on November 8, 2010
  11. Science

    Any help would be appreciated! Which of the following is a way to improve the efficiency of a heat engine? increase Qh reduce Qh reduce Wnet increase Qc A What are the energies associated with atomic motion called? kinetic energy potential energy bond

    asked by Anonymous on January 18, 2012
  12. SOCIAL STUDIES (CHECK ANSWERS) ASAP

    1. Which of the following responsibilities are held by the legislative, rather than the executive branch? Select two answers. A) writing and voting on new laws**** B) providing social programs to citizens C) selecting new judges for federal courts D)

    asked by Bat-Man on September 15, 2016
  13. Science

    Any help would be apreciated! Which of the following is a way to improve the efficiency of a heat engine? increase Qh reduce Qh reduce Wnet increase Qc A What are the energies associated with atomic motion called? kinetic energy potential energy bond

    asked by Anonymous on January 19, 2012
  14. Physics

    A smooth circular hoop with a radius of 0.400 m is placed flat on the floor. A 0.450-kg particle slides around the inside edge of the hoop. The particle is given an initial speed of 8.50 m/s. After one revolution, its speed has dropped to 4.00 m/s because

    asked by Anonymous on March 8, 2012
  15. Business

    I have to write two memos for class. I did one but need help on the other one. Can you read mine and tell me if it's okay, den give me some ideas on how i should write my second. Memo 1: Your school is hosting a picnic and you would like to supply the soda

    asked by Anonymous on May 24, 2007
  16. Chemistry

    Explain what happens when you add sodium chloride to boiling water. I know that when sodium chloride is added to water, the boiling point of water increases. What happens when it is added to already boiling water? I know it increases the temperature, I

    asked by Mercedes on January 31, 2007
  17. Geography

    What kind of map could you use to show information about a city? -a relief map -a population density map -a political boundary map -a vegitation map -All of the above You can pick as many as you want, but the question is only worth one point. I think the

    asked by Anon on January 25, 2013
  18. Algebra

    An emergency plumber chargers $65 as a call-out fee plus an additional $75 per hour. He arrives at a house at 9:30 and works to repair a water tank. If the total repair bill is $196.25, at what time was the repair completed? In order to solve this problem,

    asked by Zhanise on September 29, 2014
  19. math

    the position of a car in time t (in hours) is (-10+45t,40+70t) and a truck (40-40t,20+75t) find the distance between the car and the truck at time t=0 in km) i have 53.9km to 1dp find an expression for d^2 in terms of t) I have 7250t^2 -8700t+290 Complete

    asked by s17 on November 30, 2016
  20. English

    Oh I am sorry the point of this letter is to show that you can write persuasive letter Mark Jones is the Head of Disablity benefits in your localDisablity office. You have a court hearring date in three months to determine if you are entilted to get any

    asked by Rachel on June 17, 2008
  21. Chemistry

    Show the calculation for the limiting reagent when 0.853g of sodium sulfate (95% pure) react with 1.707g of barium hydroxide octahydrate (87% pure) to produce a precipitate of barium sulfate. I've determined the equation is Na2SO4+Ba(OH)2*8H2O=BaSO4+2NaOH

    asked by Kevin on March 1, 2016
  22. Chemistry

    When 100mL of 1.00 M Ba (NO3)2 and 100 mL of 1.00 M Na2SO4, both at 25 degrees celsius, are mixed in a constant pressure calorimeter, a white precipitate is formed and the temperature rises to 28.1 degrees celsius. A. What is the precipitate? B. If all of

    asked by Johnny on March 9, 2011
  23. physics

    Consider N atoms con¯ned on a surface of area A at temperature T . The atoms form a two-dimensional (2D) gas of classical, noninteracting particles. (a) Calculate the partition function for the system. (b) Calculate the Helmholtz free energy, F , of the

    asked by esmat on June 13, 2011
  24. Computer Programming

    /* Develop a C program that will determine if a department store customer has exceeded the credit limit on a charge account. For each customer, the following facts are available: a) account number b) Balance at the beginning of the month c) Total of all

    asked by Claire on November 22, 2009
  25. American Government Please Check

    1. In relation to the balance of power, why is the evolution of the position of majority leader necessary? Select all that apply. (2 answers) a. because the power established by the Constitution of the president of the Senate does not establish a strong

    asked by dilly dally on March 6, 2018
  26. History

    1. What was described as the "hardest work" slaves did? A: Work in rice fields B: Work in tobacco fields**** C: Work in the lumber business D: work loading and unloading ships in port 2. Which of the following best describes the social class of a small

    asked by Anonymous human on February 3, 2017
  27. English

    Can you please tell me if the following statements are possible? Thank you very much for your help! 1) The action of the piston of the steam engine likens/is similar to/resembles/is like/ the head of an elephant in melancholy medness. 2)The town is

    asked by Franco on March 18, 2010
  28. Spanish 2

    Hi, I posted a question on the Foreign Languages section and I posted the answers I got but it doesn't show it went through. So I'll post it here! :) Fill in the blank with the correct form of the preterite verb given. 1.)Yo______el tenis. (practicar)

    asked by Fiona Coye on January 23, 2014
  29. chemistry

    If 8 cm3 of 9.9 mol m-3 Fe(NO3)3 are mixed with 10 cm3 of 1.0 mol m-3 KSCN solution in a 20 cm3 volumetric flask and water is added to bring the total volume up to 20 cm3, what is the concentration of the Fe3+ ions (in mol m-3)?

    asked by jessica on January 9, 2013
  30. Chemistry

    Predict whether the following pairs of solute and solvent will result in a solution that completely dissolves. 1. Sodium chloride and water 2. Sodium benzoate and water 3. Sodium benzoate and 1M HCl 4. Benzoic acid and 1M NaOH

    asked by Cassie on September 4, 2012
  31. chemistry

    Sodium sulfate is slowly added to a solution containing 0.0500 M Ca2 (aq) and 0.0210 M Ag (aq). What will be the concentration of Ca2 (aq) when Ag2SO4(s) begins to precipitate? Ksp=1.20×10^–5 silver sulfate ksp=4.93x 10 ^-5 calcium sulfate

    asked by alexa on April 10, 2014
  32. chemistry

    How many grams of CuSO4 . 5H2O are needed to prepare 100ml of a 0.10M solution? Remember to change the given volume to liters and take the moles and convert them to grams via the molar mass to get grams of CuSO4 . 5H2O

    asked by haley on April 20, 2015
  33. Chemistry university

    what is the ph of 50ml buffer solution which is 2M in CH3COOH and 2M in CH3CooNa? 1 Initial PH before the addition of acids and base? 2 What is the new PH after 2ml of 6.00M HCl is added to this buffer? 3 what is the new PH after 2.00ml of 6.00M NaoH is

    asked by Anonymous on August 23, 2017
  34. chemistry

    you made up a standard solution of calcium sulfate (CaSO4). the temperature is 25C. you then add 5.00*10^-3 odium sulfate (Na2SO4). Calculate the concentrations of calcium and sulfate after equilibrium is reached? The pKs of CaSO4 is 4.58.

    asked by Maria on January 15, 2011
  35. Chemistry

    Consider the reaction A+B->C+3D. A solution was prepared by mixing 50 ml of .001 M of A, 100 ml of .002 M of B, 10 ml of 1 M of C, and 75 ml of .0015 M of D. At equilibrium, the concentration of D was measured and found to be .0006 M. Calculate the

    asked by Anonymous on January 26, 2014
  36. Chemistry

    Estimate the equilibrium constant for the weak acid HCN, if a 4.68×10-3 M aqueous solution of HCN has a [H+] 0.00000151 M (make an exact calculation assuming that initial concentration is not equal to the equilibrium concentration). HCN = CN- + H+

    asked by Anna on April 17, 2013
  37. chemistry

    Estimate the equilibrium constant for the weak acid HCO2H, if a 2.19×10-3 M aqueous solution of HCO2H has a pH 3.21 (make an approximate calculation assuming that initial concentration is equal to the equilibrium concentration). HCO2H = HCO2- + H+

    asked by HELP ASAP PLEASE on October 10, 2013
  38. Chemistry

    In an excess of NH3(aq), Cu2+ ion forms a deep blue complex ion, Cu(NH3)4^2+ (Kf=5.6x10^11). Calculate the concentration of Cu2+ in a solution adding 5.0x10^-3 mol of CuSO4 to .5 L of .4 M NH3

    asked by Bam on October 24, 2010
  39. chem

    how many grams of sulfur are needed to react w/ 246 grams of mercury to form HgS? Hg + S ==> HgS unless your instructor insists on writing S as S8, in which case it will be 8Hg + S8 ==> 8HgS. The answer will be the same no matter which way the equation is

    asked by christine on July 16, 2007
  40. Mathematics

    Find the work done in moving a particle along the quadrant circle that has radius 2, going from A = (2, 0) to B = (0, 2) in the x-y plane through the force field F given by: F = (x - y)i + (x)j No diagram sorry, but the information provided does allow for

    asked by Blueberry Tuffin on April 3, 2013
  41. computers

    I was wondering if anybody could please tell me what I need to do I went to work on my power point project and when I turned on my computer a lot of my icons were missing such as my excel power point microsoft office 2007 my documents pictures my back

    asked by Anne on January 16, 2009
  42. Physics

    A skier of mass 66 kg skis straight down a 11° slope at constant velocity. Draw a free-body diagram of the skier with the various external forces acting on her. Include the force of air resistance, which is directed opposite the velocity. (Do this on

    asked by Help on March 16, 2013
  43. physics

    A 1500-kg wooden roller coaster car traveling at 15 m/s approaches the loading station where the under-track brake strips are pneumatically actuated to slow the car to a stop in 10m. What is the work done on the car by the brakes? What is the retarding

    asked by Laura on April 9, 2018
  44. english

    29. Which of the following is not a major conflict in Katherine Ann Porter's short story "He"? (1 point) A)the difficulty a family has trying to survive financially B)the struggle of a family to take care of a disabled child C)the concern of a family for

    asked by anonymous on March 1, 2014
  45. Algebra

    I am a parent trying help my son, who has trouble understanding and remembering how to work his math. I never had this math, so it is hard for me to explain it. If I see it worked out. Then I can explain it, (I, Think) here is the problems. A ball is

    asked by Stacie on February 1, 2015
  46. civics

    In modern society, what do we mean when we refer to the dividion of labor? A} the specializatoon of jobs in tthe medical field B}splitting work equally between two people C{all the jobs peopkle do are connected to other jobs D} the ways joconstruction jobs

    asked by kimberly on November 28, 2013
  47. English Expressions

    1. I work in that building across the street. 2. I am a computer programmer/ a computer scientist. 3. I am a banker/ bank clerk / bank employee / teller / 4. I am an information provider. 5. I am a prosecutor. 6. I am a lawyer/attorney. (Are both the same?

    asked by John on March 25, 2008
  48. statistics

    Can someone work this out for me, so I can use as an example to do the other ones. Does it pay to study for an exam? The number of hours studied, x, is compared to the exam grade received, y. x 4 4 6 1 1 y 75 90 95 60 80 (a) Find the equation for the line

    asked by Sue on May 25, 2013
  49. spanish

    1. "¿A que hora te despiertas los fines de semana?" "_____ Si no tengo que trabajar, duermo hasta muy tarde." 2. "At what time do you wake up on the weekends?". "_____ if i don't have work, I sleep until very late." 3. Depends on 4. Depende a. depende b.

    asked by y912f on May 12, 2009
  50. physics

    A large, solid metal sphere is suspended from a the ceiling by a cable, and is free to rotate about the wire. If the mass of the sphere is 176 kg, its radius is 0.7 m, and it is initially rotating at 28 rpm (revolutions per minute), what work is required

    asked by john on November 15, 2011
  51. English

    In the Great Gatsby what is Jordan’s Nick’s Daisy’s, and Tom’s motivation, hope, or dream. I haven't read this work. The best suggestion I can make is that you go to one or both of these websites, look up this book, and see if they have insights

    asked by Ron on March 4, 2007
  52. Chemistry

    The thermal decomposition of potassium chlorate can be used to produce oxygen in the laboratory. What volume (L) of O2 gas at 25 °C and 1.00 atm pressure is produced by the decomposition of 7.5 g of KClO3 (s)? Here is my work: V=nRT/P .0611995 mol of O2 x

    asked by Gweedo on June 17, 2009
  53. Applied Physics

    When a 3600 lb automobile runs out of gas, it is pushed by its unhappy driver and a friend a quarter of a mile (0.250 mi). To keep the car rolling, they must exert a constant force of 175 lb. (a.) How much work do they do? (b.) If it takes them 15 minutes,

    asked by Kayla on October 22, 2013
  54. Math

    I am a parent trying help my son, who has trouble understanding and remembering how to work his math. I never had this math, so it is hard for me to explain it. If I see it worked out. Then I can explain it, (I Think) here is the problems. A ball is tossed

    asked by Stacie on February 1, 2015
  55. English

    Could you please check this dialogue and tell me if the expressions are commonly used in American English? Would you have written them differently= 1.How are things with you? Any news? 2.We’ve moved house. 3.Where did you move to? 4.We moved to Villiers

    asked by Henry2 on February 20, 2012
  56. PHYSICS

    ANOTHER QUICKQUESTION ABOUT THIS ONE, PLEASE HELP pete and john play a game of tug war on a frictionless icy curface. pete weighs 539 N and john weights 392 N. during the course of the game, john accelerates toward pete at a rate of 3 m/s^2. Sarah decideds

    asked by SAMIR on January 24, 2010
  57. Physics

    If a .3kg arrow is fired at 120m/s at a 30degree angle with the horizontal, how high is it at the top of its arc? I'm confused. Do I break up the x and y components of velocity or do I set initial KE + PE = KE (top of arc)+ PE (top of arc) to get

    asked by Brigid on April 16, 2009
  58. Math

    my problem is: From the box containing 5 red balls, 7 blue balls, 10 black balls. you select 4 balls what is the probabilty that EXACTLY 2 balls are black. i know that you start it/set it up like this: c(10,2)c(2,1) divided by c(22,4) and i can get the

    asked by Katia on December 13, 2010
  59. accounting

    RC Corp. uses a job order cost accounting system. During the month of April, the following events occurred: (a) Purchased raw materials on credit, $32,000. (b) Raw materials requisitioned: $25,800 as direct materials and $10,500 indirect materials. (c)

    asked by Anonymous on December 10, 2011
  60. Social Studies (Check my answers please!)

    What did the Mayan caldenders track? 1. Religous celebrations and battles 2. Religous celebrations and the seasons ** 3. Games of pok-ta-tok and the seasons 4. Games of pok-ta-tok and battles The Aztech capital of Tenochtitlan stood on the site of

    asked by Zach on March 27, 2017
  61. calculus

    given 7sin^2 theta + cos theta sin theta = 6 show that tan^2 theta + tan theta - 6 = 0

    asked by suz on January 11, 2011
  62. trignometry(maths)

    if 3tan tita=4,show that( 4cos tita-sin tita/2cos tita+sin tita)=4/5

    asked by Anonymous on May 30, 2015
  63. maths

    if 3tan tita=4,show that( 4cos tita-sin tita/2cos tita+sin tita)=4/5

    asked by Anonymous on May 30, 2015
  64. Precalc

    My problem is this: Three friends want to share a circular 14-inch pizza equally by exactly only two parallel cuts. How far from the center must the cuts be? Hint: The pizza is a circle of radius 7 inches. My professor wants a neat and detailed solution

    asked by Tamara on March 6, 2017
  65. Chemistry

    What acid and what strong base would react in aqueous solution to produce the following salts in the formula equation? Write the balanced formula equation for each reaction. a) potassium perchlorate b) cesium nitrate c) calcium iodide I don't need just the

    asked by Steven on December 28, 2011
  66. Chemistry

    What is the pH of a 1.00 L solution of the following buffer 0.500 M propanoic acid (HC3H5O2 Ka = 1.30 × 10^−5) / 0.800 M sodium propanoate after the addition of 0.700 mol solid NaOH. I tried using the Henderson-Hasselbach equation pH = pKa + log[A-/HA]

    asked by Anonymous on October 27, 2009
  67. Chemistry

    Ammonium nitrate a common fertilizer was used by terrorists in the trgic explosion in oklahoma city in 1995.how many litres of gas at 307oc and 1.00atm are formed by the explosive decomposition of 15kg of ammonium nitrate to nitrogen, oxygen and water

    asked by David on November 29, 2016
  68. physics

    A rope attached to a truck pulls a 180-kg motorcycle at 9.0 m/s. The rope exerts a 400-N force on the motorcycle at an angle of 15∘ above the horizontal. What is the work that the rope does in pulling the motorcycle 300 m? Express your answer with the

    asked by Myah on December 14, 2014
  69. Chemistry

    1. What does 'the time taken to reach completion decreases if 20cm^3 of hcl containing 4mol/dm^3' means? How to work out to find the concentration? 2(a)What does concentrated hcl means? (b)What does dilute hcl means? Which will react faster or slower / a

    asked by StuartKess on October 30, 2011
  70. 4th Grade Math

    Re: Factor Numbers My son has to write at least two ways to break down numbers - I know he did not learn this in school but I would like to help him at home, please help me I have not done this work in over 30 years. He has to break down the numbers 56,

    asked by Carol on June 9, 2010
  71. 4th Grade Math

    Re: Factor Numbers My son has to write at least two ways to break down numbers - I know he did not learn this in school but I would like to help him at home, please help me I have not done this work in over 30 years. He has to break down the numbers 56,

    asked by Carol on June 9, 2010
  72. calculus2

    A tank is full of water. Find the work required to pump the water out of the spout. (Use 9.8 m/s^2 for g. Use 1000 kg/m^3 as the density of water. Assume r = 9 m and h = 3 m.) The tank is a spherical shape with r as the radius(9m). On top of the tank is a

    asked by A on June 28, 2018
  73. Microeconomics

    6.) "Since peaking in 1976, per capita beef consumption in the United States has fallen by 28.6 percent... [and] the size of the U.S. cattle herd has shrunk to a 30-year low." a.) Using firm and industry diagrams, show the short-run effect of declining

    asked by Evan on November 8, 2007
  74. physics

    An infinitely long thin metal strip of width w=12cm carries a current of I=10A that is uniformly distributed across its cross section. What is the magnetic field at point P a distance a=3cm above the center of the strip as shown? This one requires some

    asked by roger on April 7, 2014
  75. math

    A dealer buys an article at Rs x and sells it for R96 ,thus making a profit of x%.find the value of x. I assume that "R" represents a unit of currency such as the Chinese Renminbi. 98/x = 1 + x/100 Turn that into a quadratic equation and solve for x. Take

    asked by Davina on July 4, 2007
  76. physics

    An infinitely long thin metal strip of width w=12cm carries a current of I=10A that is uniformly distributed across its cross section. What is the magnetic field at point P a distance a=3cm above the center of the strip as shown? This one requires some

    asked by may on April 7, 2014
  77. physics

    A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Two metallic blocks are placed in the water. One is a 50 g piece of copper at 79°C. The other sample has a mass of 83 g and is originally at a

    asked by Kelsey on April 28, 2010
  78. english

    In "My Brother's Keeper" the author includes the line " and Jamie thought to himself, this time it must be bad" in Jamie's phone conversation with Ted in order to? a) explain how uncle harry usually takes care of Ted b) develop Ted as a character who often

    asked by cassie on October 15, 2015
  79. Physics

    The mass of the float is 50.0 kh and it has a volume of 1.0 m^3.det ermine the density of the float and the tension on the rope. You may assume g=10N/kg. So I know that mfloat = 50.0kg weight of float = 50.0 x 10 = 500N Vfloat = 1.0 m^3 density of Sea

    asked by Herbert on October 5, 2013
  80. Language Arts

    The author of "My Brother's Keeper", includes the line "and Jamie thought to himself, this time it must be bad" in Jamie's phone conversation with Ted in order to a. explain how Uncle Harry usually takes care of Ted. b. develop Ted as a character who is

    asked by Sam on September 4, 2017
  81. books (Hamlet)

    The Earl of Surrey's most cutting use of irony is..? Choose from either.. A) "Thou art a proud traitor, priest." (line 9) B) "Whilst your great goodness, out of holy pity, / Absolved him with an axe." (lines 22 and 23) C) "Your goodness, / Since you

    asked by Suzanne on October 27, 2013
  82. Physics / Astronomy

    Here is my question: Consider the bending of light by the gravitation of the Sun as described by Newtonian physics. Light of frequency f passes at a distance d from the center of the Sun, which has a mass M. Show that the bending angle of the light is

    asked by Barry on May 28, 2008
  83. classroom instruction

    Teachers do need to establish ground rules about discussion: students should learn to listen politely to each other, and to agree to differ on occasion. Teachers can model calm and polite behavior, without giving in to irrationality. It is important to

    asked by scooby on March 10, 2010
  84. Algebra

    I have a few more questions that I either need help with or just need checking. Is the algebraic expression a polynomial? if it is write the polynomial in standard form, 1. 6x-9+8x^2 I got Yes; 8x^2+6x-9 Perform the indicated operations. Write the

    asked by Soly on August 13, 2007
  85. Physics

    A 1100- kg car collides with a 1500- kg car that was initially at rest at the origin of an x-y coordinate system. After the collision, the lighter car moves at 20.0 km/h in a direction of 35 o with respect to the positive x axis. The heavier car moves at

    asked by Alex on November 4, 2014
  86. physics

    A 1100- kg car collides with a 1500- kg car that was initially at rest at the origin of an x-y coordinate system. After the collision, the lighter car moves at 20.0 km/h in a direction of 35 o with respect to the positive x axis. The heavier car moves at

    asked by Alex on November 4, 2014
  87. Chemistry

    A hard water sample contains 121 mg of CaCO3 per liter of water. Calculate the mass of Na3Po4 needed to remove all Ca^2+ ions from 2.50 L of the water sample? Please help! This question is already on here, but I don't understand the part where it says

    asked by Sam on July 1, 2013
  88. Cemistry

    Hi, I've been trying to solve this chemical equation for the last 30 minutes and am only confusing myself. I am wondering if the product I obtained is correct. The question is to write a balanced equation for the below reaction and be sure to indicate the

    asked by Julie on March 16, 2012
  89. statistics

    solve this math statistic problem: an insurance company insures a person's antique coin collection worth $20,000 for an annual premium of $300. If the company figures that the probability of the collection being stolen is 0.002, what will be the company's

    asked by Anonymous on March 24, 2013
  90. College Physics

    How do I solve this problem: A particular wire has a current of 10A. A) How many electrons pass a fixed point every 5 seconds? B)If a wire has a radius of 2 x 10^(-3) m and the electron drift speed is 2.63 x 10^(-5) m/s, determine the number density of

    asked by Kate on February 4, 2010
  91. social economics

    Does international law work? In what situations is it most effective? In what situations is it least effective?

    asked by janet on October 21, 2010
  92. math

    how many 1/10 inch pieces of string can be cut from a 16.3 inch string my work out 1/10 / 16.3

    asked by meghana on October 2, 2015
  93. science

    Work is done when a force is applied or an object OR a force causes an object to move I think the second one.

    asked by Kiki on February 19, 2011
  94. pre cal

    how do you work out cot squared feta - CSC squared feta?

    asked by sam on April 26, 2011
  95. physics

    Mass M1 has twice the mass of M2. M1 and M2 are raised from a height of 5 m to 25 m, and from 14 m to 24 m, respectively. What is the ratio of work done on mass M1 to that done on mass M2? A. 1 : 4 B. 25 : 12 C. 4 : 1 D. 2 : 1 E. 5 : 1

    asked by dali on March 3, 2017
  96. calculus

    find functions f(x) and g(x) so that f(g(x))= sqrt(tan(3x^2 - 7)) Would this work??? g(x)= 3x^2 -7 f(x)= sqrt(tan(x))

    asked by Blake on October 12, 2010
  97. English- textual history

    What does it mean to research a textual history of a work? i.e. Hamlet's textual history

    asked by Nelson on December 11, 2007
  98. Eli whitney

    How did he invent the cotton gin what makes the cotton gin work

    asked by Anonymous on December 21, 2009
  99. physics

    Can you get more force out of a lever than you put in? Can you get more work out of a lever than you put in. Explain

    asked by Anonymous on October 15, 2008
  100. maths

    The sum of two numbers is 35. The second number is four times the first number.Work out the 2 numbers

    asked by rehman on February 19, 2018

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