1. Chemistry

    To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) Determine the mass of gold that can be extracted if 27.4 g sodium

    asked by tdb on February 9, 2010
  2. chemistry

    To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) Determine the mass of gold that can be extracted if 27.4 g sodium

    asked by tg on February 7, 2010
  3. Chemestry

    To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) (a) Determine the mass of gold that can be extracted if 29.3 g sodium

    asked by Kenah Smith on February 6, 2013
  4. physics

    Problem: A sample of liquid has amass of 1.04 kg and a volume of 1300 ml. If the mass of the sampleis to be increased by 70 g by adding more of the same kind kind ofliquid, what volume of liquid must be added? Solution given: 1) 1040/1300=.80 2) 70/.80=88

    asked by andrea on January 24, 2011
  5. physics

    Problem: A sample of liquid has amass of 1.04 kg and a volume of 1300 ml. If the mass of the sampleis to be increased by 70 g by adding more of the same kind kind ofliquid, what volume of liquid must be added? Solution given: 1) 1040/1300=.80 2) 70/.80=88

    asked by andrea on January 24, 2011
  6. Chemistry

    To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) (a) Determine the mass of gold that can be extracted if 21.4 g sodium

    asked by Dovahkiin on February 19, 2011
  7. Chemestry

    To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) (a) Determine the mass of gold that can be extracted if 29.3 g sodium

    asked by Kenah Smith on February 6, 2013
  8. Math

    From an observation tower that overlooks a runway, the angles of depression of point A, on one side of the runway, and point B, on the opposite side of the runway are, 6 degrees and 13 degrees, respectively. The points and the tower are in the same

    asked by jasmine on July 21, 2013
  9. MATH

    E LARGEST PYRAMID IN THE U.S. IS THE LUXUR HOTEL IN VEGAS. THE VOLUME OF THIS HOTEL IS 28,933,800 OR ABOUT 29 MILLION CUBIC FEET. THE HEIGHT OF THE PYRAMID IS 148 FEET LESS THAN THE LENGTH OF THE BUILDING. THE BASE OF THE BUILDING IS SQUARE. FIND THE

    asked by HOPE on March 10, 2008
  10. calc

    Are these correct? lim x->0 (x)/(sqrt(x^2+4) - 2) I get 4/0= +/- infinity so lim x->0+ = + infinity? and lim x->0- = + infinity? lim x->1 (x^2 - 5x + 6)/(x^2 - 3x + 2) I get 2/0, so lim x-> 1+ = - infinity? and lim x->1- = + infinity? lim h->0

    asked by Chelsea on October 13, 2010
  11. Calc. Limits

    Are these correct? lim x->0 (x)/(sqrt(x^2+4) - 2) I get 4/0= +/- infinity so lim x->0+ = + infinity? and lim x->0- = + infinity? lim x->1 (x^2 - 5x + 6)/(x^2 - 3x + 2) I get 2/0, so lim x-> 1+ = - infinity? and lim x->1- = + infinity? lim h->0

    asked by Chelsea on October 13, 2010
  12. Algebra 2

    Describe two laws of exponents and provide an example illustrating each law. Explain how to simplify your expression. How do the laws work with rational exponents? Provide a third expression to simplify that includes rational (fractional) exponents

    asked by Help Please on April 28, 2008
  13. Calc Please Help

    Are these correct? lim x->0 (x)/(sqrt(x^2+4) - 2) I get 4/0= +/- infinity so lim x->0+ = + infinity? and lim x->0- = + infinity? lim x->1 (x^2 - 5x + 6)/(x^2 - 3x + 2) I get 2/0, so lim x-> 1+ = - infinity? and lim x->1- = + infinity? lim h->0

    asked by Chelsea on October 14, 2010
  14. Math

    Problem Solving: Work Backward Will arrived at his mother's office at 3 p.m. It took him 30 minutes to walk from his home to the mall. He was in the mall for 45 minutes. It them took him 15 minutes to walk to his mother's office. At what time did Will

    asked by Quan on May 2, 2013
  15. Physics/Math

    A boy whirls a stone in a horizontal circle of radius 1.2 m and at height 2.0 m above ground level. The string breaks, and the stone flies horizontally and strikes the ground after traveling a horizontal distance of 10 m. What is the magnitude of the

    asked by winterWX on February 3, 2007
  16. math

    Paula is an office manager for ABC Advertising. She has been tasked with finding a copy machine that falls within a budget of $750 per month. She finds a company that will lease the machine for $275 a month. Each copy costs 4¢ and a ream of 500 sheets of

    asked by sally on April 25, 2014
  17. Physics

    So I have worked out the 'allowed' configurations for four particles which can occupy 5 different energy levels (1, 3, 5, 7, 9) and now I need to work out the average number of particles in a particular energy level (i.e 3). 1) 9,5,1,1 2) 9,3,3,1 3)

    asked by Anon on May 6, 2018
  18. physics!!

    A flight attendant pulls her 70.0 N flight bag a distance of 263 m along a level airport floor at a constant speed. The force she exerts is 41.0 N at an angle of 52.0° above the horizontal. (b) Find the work done by the force of friction on the flight

    asked by brittany on April 15, 2010
  19. math

    Take any number (except for 1). Square that number and then subtract one. Divide by one less than your original number. Now subtract your original number. Did you reach 1 for an answer? You should have. How does this number game work? Hint: Redo the number

    asked by Paula on November 2, 2010
  20. physics

    A 79-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.8 s. (a) Calculate the mechanical work done by the sprinter during this time. J (b) Calculate the average power the sprinter must generate. W (c) If the sprinter converts food energy to

    asked by Annette on April 29, 2013
  21. physics

    A 79-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.8 s. (a) Calculate the mechanical work done by the sprinter during this time. J (b) Calculate the average power the sprinter must generate. W (c) If the sprinter converts food energy to

    asked by Annette on April 29, 2013
  22. Physics ( just need a lil help multiplying

    Calculate the force of gravity between a 2.50 kg newborn baby and a 80.0 kg doctor standing 0.250 m away. G = 6.67 E -11 N*m2/kg2 My work Fg = (Gm1 Gm2) /d^2 m1=2.50 kg m2=80.0 kg d=0.250 m g=6.67 E -11 N*m2/kg2 Fg = (Gm1 Gm2) /d^2 Fg= g ( 2.50 kg)(80.0

    asked by Bongo on February 1, 2008
  23. Math (money)

    After spending $200 of her money on a dress. Lily spent 20% of her remaining money on a bag. She then spent $131 on a pair of shoes. In the end, she had 20% of the original amount Lily had at first. What is the original total amount she had at first? My

    asked by user1234 on June 7, 2016
  24. Physics

    The temperature in an electric oven is 165°C. The temperature at the outer surface in the kitchen is 55°C. The oven (surface area = 1.6 m2) is insulated with material that has a thickness of 0.023 m and a thermal conductivity of 0.045 J/(sm°C). a) How

    asked by papito Urgent help needed on April 18, 2007
  25. Chemistry

    A large sport utility vehicle has a mass of 2500kg. Calculate the mass of CO2 emitted into the atmosphere upon accelerating the SUVfrom 0.0mph to 66.0 mph. Assume that the required energy comes from the combustion of octane with 30% efficiency. (Hint: Use

    asked by Ashley on December 3, 2010
  26. Geography

    Textile mills in America and Europe became more efficient due to advancements in machinery such as the Spinning Jenny and power loom. What resulted from the technology advancements in the textile industry? Women and children never had to work in textile

    asked by Bro on February 6, 2019
  27. LA 7

    Which statement from "Why Do We Need Zoos?" best captures the author's point of view? 1. "...zoos were open to the general public, too, so everyone could find out about animals." 2. "Some people feel that there is lots of wild space and that animals should

    asked by Cool on April 26, 2016
  28. math

    A certain football league has the following scoring system: - each field goal counts for 5 points - each touchdown counts for 3 points The only way to score points is with some combination of field goals and touchdowns. They have noticed that not every

    asked by Kelly on October 15, 2006
  29. English

    Do these work? We have to pick quotes from a book I read. Do you see these as representing the chosen items? Bravery: (This quote talks about how she is going to plead innocent,knowing she will die anyway for being a witch) “If I do not do this thing,

    asked by Bryce on August 7, 2013
  30. sciology college course

    A science teacher tells her class that their final project requires the student to measure a specific variable and determine the velocity of a car with no more 2.5% error. Jennifer and johnny work hard and decide the velocity of the car is 34.87 m/s. The

    asked by sucker 1 on April 14, 2013
  31. science

    A science teacher tells her class that their final project requires the students to measure a specific variable and determine the velocity of a car with no more than 2.5% error. Jennifer and Johnny work hard and decide the velocity of the car is 34.87 m/s.

    asked by JUSTIN on May 19, 2013
  32. Physics (Normal force and static coefficient)

    Calculate the normal force for a 2 kg object at rest on an inclined surface, α=42 degrees How much is the static coefficient of friction between the surface and the block ---- My work: N = mg*cos(θ) N = (2kg)(9.8n/m^2)cos(42) = 14.57 N F = µsN µs = F/N

    asked by Jana on June 18, 2016
  33. Physics

    In two separate experiments, a sample of helium gas is taken from the same initial state to the same final state, along two separates paths on a P-V diagram. Path a has two parts: first an isochor and second isobar. Path b is an isotherm. Determine the

    asked by Bryan on February 18, 2018
  34. math

    Hi again. I don't understand these two questions so um please help me. Also explain me how to do it. Please 1. An electrician charges $40 to come to your house. She also charges $55 for each hour that she works. The electrician charges you a total of $190.

    asked by Amanda on September 25, 2017
  35. Chemistry

    the specific heat of a substance is the energy (Joules) required to raise one gram of substance by one degree celsius (units J/g°C). Heating 225.0° cm3 of a solid from 36.1° to 74.3°C takes 35850 J of energy. The density of the solid at 36.1°C is 1.75

    asked by Ally on March 15, 2011
  36. computers in day care

    Which of the following statements about children and computers is not correct? A. Today, many children begin using computers in preschool or day care. B. Some day care providers begin computer-assisted instruction with children as young as two years old.

    asked by nk on July 24, 2011
  37. PHYSICS : )

    A flight attendant pulls her 69.1 N flight bag a distance of 280 m along a level airport floor at a constant velocity. The force she exerts is 32.7 N at an angle of 50.2◦ above the horizontal. Find the work done by the force of friction on the flight

    asked by Jay on October 18, 2008
  38. Chemistry

    Could you please check my work about complete ionic and net ionic equations. They really confuse me. My original equation, after I balanced, was: FeCl2(aq)+Na2S(aq)=FeS(s)+2NaCl(aq). For complete Ionic I think its:

    asked by DeDe on April 21, 2015
  39. Chemistry

    When 0.655 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 107C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant

    asked by Anonymous on February 25, 2008
  40. econ

    The unemployment rate is determined by individuals filing for unemployment assistance from the government or other similar programs, such as disability. If 2 million of those individuals decided to stop looking for work, they would necessarily stop filing

    asked by sue on June 21, 2019
  41. english

    please proofread my contrast and comparision paper Another War for the People of the United States Although the Air Force, Navy, and Army were different in the 1940's and the 200's show that, even though technology and communication have improved,

    asked by austin on November 18, 2012
  42. Chemistry

    If 45.3 mL of liquid CS2 and 7.62 L of gaseous O2 measured at STP are reacted stoichiometrically according to the balanced equation, how many milliliters of liquid CS2 remain? CS2(l) + 3O2(g) -> CO2(g) + 2SO2(g) Molar Mass (g/mol) CS2 76.143 O2 31.998

    asked by Lisa on April 20, 2010
  43. Chemistry

    Cocaine is a non-electrolyte that has a molecular weight of 303.4 g/mole. How many grams must be dissolved in 25.0 mL of Chloroform (density = 1.484 g/mL) to raise its boiling point to 65.5 Celsius? The boiling point of pure Chloroform is 61.2 Celsius. Kb

    asked by Alyssa on February 26, 2012
  44. chemistry

    I balanced an equation between lead(II) nitrate and potassium sulfate and ended up with: Pb(NO3)2 + K2SO4 --> PbSO4 + 2 KNO3 If 0.87 moles of potassium sulfate react with an excess amount of lead(II) nitrate, how many moles of lead(II) sulfate would be

    asked by Nicholas on April 2, 2012
  45. Math

    If Leah is 6 yr.s older than sister, Sue, & John is 5 yrs. older than Leah, and the total of their ages is 41. How old is Sue? Still having problems setting the problem up. Have hit a brick wall. Any suggestions? Have you tried algebra? Let J = John's age

    asked by Katie on March 5, 2007
  46. Physics

    A 0.20-kg ball on a string is whirled on a vertical circle at a constant speed. When the ball is at the three o'clock position, the string tension is 16 N. Find the tensions in the string when the ball is at twelve o'clock and at the six o'clock positions.

    asked by Sanjna on October 6, 2009
  47. Physics

    A comet orbits the Sun with a period of 72.0 yr. (a) Find the semimajor axis of the orbit of the comet in astronomical units (1 AU is equal to the semimajor axis of the Earth's orbit). (b) If the comet is 0.60 AU from the Sun at perihelion, what is its

    asked by James on July 18, 2012
  48. OChem

    A mixture of fluorene and benzoic acid is dissolved in diethyl ether and mixed thoroughly with an aqueous solution of NaOH. After the layers separate, what will each of the layers contain? Label the layers. Indicate the main components, not species that

    asked by David on October 20, 2011
  49. english

    While there is little evidence that the federal capital punishment system treats minorities unfairly, some may argue that the death penalty systems in certain states may be discriminatory. One such state is Maryland. In May 2001, then-Governor Parris

    asked by Mary on October 13, 2009
  50. Science - Biology - Ecology

    I desperately need help on the iron hypothesis and related facts: Where are HNLC waters found and why? (a map would be nice) What is the fate of the organic carbon fixed by photosynthesis in the deep ocean? How does iron enter the ocean eco-system? What is

    asked by Robert on November 12, 2007
  51. Science

    When elemental sulfur,S8,is heated with AgF,a gas forms that contains only sulfur and fluorine. The following tests were done to characterize this gaseous product. *The density of the gas was found to be 0.807g/L at 152mmHg and 35 degrees celsius. *When

    asked by anonymous on November 10, 2009
  52. Algebra

    A baseball player's batting average is the number of hits the player has divided by the number of at-bats. At the beginning of a game, a player has a batting average of .360. During the game, the player gets 3 hits during 5 at-bats, and his batting average

    asked by Amie on January 16, 2013
  53. writing inequalities

    you must have an average score of at least 80 to get a B on your report card. You have scores of 61,70,99, and 70. What is the minimium score you must get on the last test to get a B on your report card? the minimum score you can make and receive an 80 is

    asked by Anonymous on March 18, 2007
  54. math

    1. A baseball diamond is actually a square, 90 feet on each side. What is the distance from third base to first base? 2. The equation gives the distance, D, in miles that a person can see to the horizon from a height, h, in feet. a) Solve this equation for

    asked by summer on August 30, 2010
  55. math

    Help me solve this!! Joeys father stops at the gas station to buy gas. The car has a 16 gallon tank, and the feul gauge says there are 3-4 of a tank of gas. If joeys dad buys 6 gallons of gas, what fraction of the tank will the car´s feul gauge read??

    asked by tayler on December 12, 2007
  56. math

    The formula for the lateral surface area of a cone is A=πr√(h^2+r^2). (A)Solve for r and simplify the result, if possible. (B) If the lateral surface area of a cone is 10 square feet and the height is 16 inches, what is the radius of the cone in inches?

    asked by Andrea on April 24, 2018
  57. math

    1. A baseball diamond is actually a square, 90 feet on each side. What is the distance from third base to first base? 2. The equation gives the distance, D, in miles that a person can see to the horizon from a height, h, in feet. a) Solve this equation for

    asked by summer on September 4, 2010
  58. Physics(Please respond)

    There is a rod that is split into two sections. The left side is copper with value of 390, temp of 100 degrees c and the length is 2m. The right side is silver, 420, temp 20 degrees celsuis, and length 1m. I need to calculate the temperature. 390 X 1 X

    asked by Hannah on June 15, 2012
  59. Physics(Please check)

    There is a rod that is split into two sections. The left side is copper with value of 390, temp of 100 degrees c and the length is 2m. The right side is silver, 420, temp 20 degrees celsuis, and length 1m. I need to calculate the temperature. 390 X 1 X

    asked by Hannah on June 13, 2012
  60. Chemistry

    Consider 2 separate solutions, one of a weak acid HA and one of HCL. Assume that you started with 10 molecules of each. Draw a picture of what each solution looks like at equilibrium. Ok to my very limited knowledge on this subject so far, a weak acid at

    asked by kevin on October 11, 2011
  61. Science

    You are given 10 µL of a DNA stock solution that has 1.0 µg target DNA/µL. The target DNA molecule is 2.9 kb in length. Describe a set of serial dilutions that would yield a standard curve with the following concentrations: 2 x10^7 copies/µL, 2x10^6

    asked by Meena on April 7, 2014
  62. 2 balloons and a doubled distance (physics)

    EARLIER SOMEONE POSTED: "Two like-charged balloons, placed at a distance of .5 meters, experience a repulsive force of .32 N. What is the force if the distance between the two balloons is doubled? If you use Coulomb's Law, the equation used to find .32 N

    asked by help! on February 27, 2011
  63. ELA

    Video Presentation Permission Form Mary O'Dell Video Broadcast Permission Form Willow High School Teacher’s Name: __________________________ Date: __________ Name of Video:____________________________________________ Video rating - G PG PG-13 R NR (not

    asked by Dolphin on February 15, 2018
  64. 8th grade math - Variations

    Can you check the following, please? 1. Two minutes after a skydiver opens his parachute, he has descended 1900 feet. After 5 minutes, he descended 4750 feet. If distance varies directly with the time, at what rate is skydiver descending? Ans: to find unit

    asked by Alexis on February 15, 2016
  65. French

    Hi, I did a paragraph of what I will do this weekend. The problem is, I'm not sure how to correctly put my verb tenses in the future. Can someone please help? Thanks in advance! In English: This weekend, I will catch up on psychology homework. I will also

    asked by Anonymous on April 26, 2019
  66. Human Services

    Creating a Budget Various budget approaches play an important role in resource allocation in human service organizations. You are the executive director for a local government workforce agency that focuses on providing career- and work-related skills. The

    asked by Angel on February 1, 2012
  67. Physics repost

    FM radio stations use radio waves with frequencies from 88.0 to 108 MHz to broadcast their signals. Assuming that the inductance has a value of 4.60 x 10^-7 H, determine the range of capacitance values that are needed so the antenna can pick up all the

    asked by Mary on October 17, 2007
  68. Physical Science

    A donkey pulls a cart(c) with a mass of 240kg, attached to a log of wood(w), with a mass of 80kg on a horizontal road. W is tied to the back of c by means of non elastic rope. The donkey applies a foce of 170N on Cart c and the system accelerates at 0,3m

    asked by Taryn on March 15, 2007
  69. art history

    Hello! I just need help in confirming/denying my own answers. For wrong answers, any assistance would be appreciated. These are study questions for an upcoming test so guidance would be EXTREMELY helpful. THANK YOU THANK YOU THANK YOU :) 1. The Sanctuary

    asked by kailey on November 17, 2014
  70. computers

    1. It is important to include voice and point of view in writing because (1 point) A. It helps the reader understand the characters feelings and emotions B. It adds more words to the story C. It makes the information stand out D. It makes the story more

    asked by Bob on March 3, 2014
  71. Geography

    How do you think the existence of nearly 3,000 ethnic groups and 800 languages affect life in countries south of the Sahara? The countries south of the Sahara show more diversity and variety of culture than anywhere in the world. This region speaks more

    asked by Chandler on July 6, 2011
  72. MATH Graphing Domain

    Consider the linear function with equation y = 3x + 5. Sketch the graph of the linear function on the grid. h t t p : //img402 . imageshack . us/img402/1466/picture38c . j p g Here is a picture of the graph, and this is how I did it. h t t p : //img9 .

    asked by Anonymous on September 13, 2011
  73. Quadratic Equations

    Ok, I am supposed to find out what the variables are by factoring and finding square roots. I couldn't find the right factors of a and c that added up to b in the equation (did that make sense?). Please help me find them! TYVM -5n+6n^2-4=0 I know

    asked by Emily on February 8, 2007
  74. Physics

    A 0.40kg block is held against a compressed spring of stiffness 68.2N/m and compression 0.64m parallel to a 24 degree incline that is 1.27m long.  The coefficient of kinetic friction between the block and the incline is 0.34.  The external force holding

    asked by Alphonse on October 15, 2012
  75. Chemistry

    Reposting with correct information..Carbon tetrachloride (CCl4) and benzene (C6H6) form ideal solutions. Consider an equimolar solution of CCl4 and C6H6 at 25°C. The vapor above this solutionis collected and condensed. Using the following data, determine

    asked by Minx on December 8, 2011
  76. science

    Rates of Reactions  I am conducting a experiment on increasing the rate of a reaction by increasing the surface area. For this I am reacting hydrochloric acid and marble chips.  Variables:-  -Independent: the mass of marble chips  -Dependent: The

    asked by Heena on November 23, 2014
  77. Chemistry

    Rates of Reactions I am conducting a experiment on increasing the rate of a reaction by increasing the surface area. For this I am reacting hydrochloric acid and marble chips. Variables:- -Independent: the mass of marble chips -Dependent: The volume of gas

    asked by Anonymous on November 22, 2014
  78. Chemistry

    Rates of Reactions I am conducting a experiment on increasing the rate of a reaction by increasing the surface area. For this I am reacting hydrochloric acid and marble chips. Variables:- -Independent: the mass of marble chips -Dependent: The volume of gas

    asked by Anonymous on November 22, 2014
  79. Math

    My answers 1.A 2.C 3.D 4.A 5.A 6.D 7.B 8.D 9.D 10.C 1. Write the following ratio in simplest form: 32 min:36 min (1 point) 8:98:3632:9128:144 2. Marie saved $51. On Wednesday, she spent $8 of her savings. What ratio represents the portion of her total

    asked by Bill Cipher on December 2, 2016
  80. Math

    There are three distinct ways to add four positive odd numbers to obtain 10: 1 + 1 + 3 + 5 = 10 1 + 1 + 1 + 7 = 10 1 + 3 + 3 + 3 = 10 Here, distinct means that changing the order of the numbers on the left-hand side of an equation does not count as a new

    asked by SkaterGirl on December 5, 2010
  81. Algebra

    State the possible number of imaginary zeros of g(x)= x^4+3x^3+7x^2-6x-13 this is how far Ive gotten:there are 4 zeros,3 positive and 1 negative If you've found four real zeroes, then there are no imaginary zeroes. You can also see that there are no

    asked by Marissa on August 10, 2007
  82. Chemistry Problem

    At 25 oC, Kc = 0.145 for the following reaction in the solvent CCl4. 2BrCl Br2 + Cl2 A solution was prepared with the following initial concentrations: [BrCl] = 0.0482 M, [Br2]= 0.0307 M, and [Cl2]= 0.0277 M. What will their equilibrium concentrations be?

    asked by Peter on March 8, 2013
  83. AP Chem

    At 25 oC, Kc = 0.145 for the following reaction in the solvent CCl4. 2BrCl Br2 + Cl2 A solution was prepared with the following initial concentrations: [BrCl] = 0.0482 M, [Br2]= 0.0307 M, and [Cl2]= 0.0277 M. What will their equilibrium concentrations be?

    asked by Peter on March 8, 2013
  84. physics

    A 12 kg mass on a horizontal friction-free air track is accelerated by a string attached to a 100 kg mass hanging vertically from a pulley as shown. Compare the accelerations when the masses are interchanged, that is, for the case where the 100 kg mass

    asked by naomi on June 3, 2007
  85. Chemistry

    You want to neutralize 6 mol of sulfuric acid with 6.0 M sodium hydroxide. How much 6.0 M sodium hydroxide must you add to react exactly with the sulfuric acid? 2NaOH(aq)+H2SO4(aq)-->2H2O(l)+Na2SO4(aq) 2 moles sodium hydroxide for every 1 mol sulfuric

    asked by Kierstin on May 7, 2016
  86. Physics

    A plane drops a bomb from an altitude of 10,000m. a. Determine the time the bomb is in the air. b. Determine the velocity the bomb would have right before it hits the ground. c. Before the bomb is launched the plane has a horizontal velocity of 92m/s.

    asked by Alex on November 19, 2012
  87. Math

    1. Given the following polynomial: 2x^2 + 7x - 15 = 0 Check all that apply.  The value of the discriminant is 169.  There are 2 real roots.  There are 2 irrational roots.  The graph intersects the y-axis twice.  The parabola is directed

    asked by Anonymous on June 21, 2017
  88. physics

    4 packets of charges are arranged in a circle. Each packet is 90 degrees from each other. Each packet consists of 22 elementary charges associated with the nucleus of two sodium atoms. A test charge is placed in the center of the circle of packets. The

    asked by Pat on March 19, 2018
  89. chemistry

    Calculate the number of grams of reactant left over when 28.35 grams of silver reacts with 50.0 liters of air at STP which is 20.9476 % oxygen by volume. The density of air at STP is 1.292 g/L. attemt at a solution: m = dv = 64.6 g of air moles silver

    asked by jason on November 7, 2008
  90. Budget Matrix

    Creating a Budget Various budget approaches play an important role in resource allocation in human service organizations. You are the executive director for a local government workforce agency that focuses on providing career- and work-related skills. The

    asked by Jacilyn Troeger on May 7, 2009
  91. Human Resources

    Creating a Budget Various budget approaches play an important role in resource allocation in human service organizations. You are the executive director for a local government workforce agency that focuses on providing career- and work-related skills. The

    asked by Dawn on June 30, 2013
  92. Secondary Math

    Fill in the empty spaces to complete the puzzle. In any row, the two left spaces should multiply to equal the right-hand space. In any column, the two top spaces should multiply to equal the bottom space. ________| - 3 | ___________ 3 | -5x+1 |-15x+3

    asked by Rose Nicol on October 24, 2014
  93. Accounting-balance sheet and income statement

    Argo Sales Corporation has in recent years maintained the following relationships among the data on its financial statements: Gross profit margin 40% Net profit margin 10% Rate of selling expenses to net sales 20% Accounts receivable turnover 8 times per

    asked by Peace on November 30, 2007
  94. physics

    A Carnot engine is operated between two heat reservoirs at temperatures 520 K and 300 K. (a) If the engine receives 6.45 kJ of heat energy from the reservoir at 520 K in each cycle, how many joules per cycle does it reject to the reservoir at 300 K? (b)

    asked by Jen on December 2, 2007
  95. physics

    A Carnot engine is operated between two heat reservoirs at temperatures 520 K and 300 K. (a) If the engine receives 6.45 kJ of heat energy from the reservoir at 520 K in each cycle, how many joules per cycle does it reject to the reservoir at 300 K? (b)

    asked by Jen on December 2, 2007
  96. chemistry

    For the reaction H2(g) + I2(g) ↔ 2 HI(g), you have the initial concentrations [H2] = 0.15 and [I2] = 0.05. Keq for the reaction at this temperature is 4.5 x 10-6. Make a reaction table. Include rows for initial concentration, change in concentration, and

    asked by Anonymous on April 24, 2012
  97. math

    marcy has a total of 100 dimes and quarters. if the total value of the coins is $14.05, how many quarters does she have? You need two equations to substitute into each other. You need one for the total number of coins, and one for the amount. d=# of dimes

    asked by help me on April 26, 2007
  98. chemistry

    For the reaction H2(g) + I2(g) ↔ 2 HI(g), you have the initial concentrations [H2] = 0.15 and [I2] = 0.05. Keq for the reaction at this temperature is 4.5 x 10-6. Make a reaction table. Include rows for initial concentration, change in concentration, and

    asked by Anonymous on April 23, 2012
  99. maths

    the load which a crame can lift up is directly proportional to the mass and inversely proportional to the height through which the load is to be lifted.if a load of 40+ and mass of 175gm is lifted through height from what load will be carried through

    asked by chinaemerem on April 25, 2017
  100. Math - extreme values

    Identify the critical points and find the extreme values on the interval [-1,-5) for f(x)=cosx+xsinx+3 I've taken the derivative which gives me f'(x)=xcos(x). I know I have to solve to get the critical points and then plug in the critical points that are

    asked by Anonymous on March 9, 2017

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