christine

Most popular questions and responses by christine
  1. chem--please help me check my answer!!

    write an ionic and net ionic equation for the following reaction between Fe3+ and NH4OH. Please check my answer!! Thank you. My answer is: ionic: Fe3+(aq) + NH4OH--> Fe(OH)3 + NH4+ net ionic: Fe3+ +OH- -->Fe(OH)3

    asked on October 25, 2010
  2. Language Arts

    Which of the following citations from The Watsons Go to Birmingham---1963 illustrates how the setting affects Byron? A. The way Byron kept his head down and was smiling and saying “Yes, ma’am” this and “No, ma’am” that, it looked like he had

    asked on January 20, 2016
  3. Trig

    A Ferris wheel is 40 meters in diameter and boarded from a platform that is 4 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 2 minutes. How many minutes of

    asked on February 13, 2013
  4. math

    Electrical system are governed by Ohm's law, which states that V = IR, where V=voltate, I=current, and R=resistance. If the current in an electrical system is decreasing at a rate of 9 A/s while the voltage remains constant at 14 V, at what rate is the

    asked on May 2, 2010
  5. math

    A 154-lb person burns 420 calories per hour riding an exercise bicycle at a rate of 15 mi/h. Write a function rule to represent the total calories burned over time by that person. Explain how the information in the problem relates to the function. Thank

    asked on December 8, 2012
  6. maths

    Starting from one oasis, a camel walks 25km in a direction 30 degrees south of west and then walks 30km toward the north to a second oasis. What distance separates the two oases?

    asked on June 6, 2011
  7. calculus

    can you please help me solve this problem if dy/dx=ycosx and y=3 when x=0, then y=

    asked on March 20, 2011
  8. Chemistry

    Write a balanced equation for the combustion of gaseous ethane (C2H6) a minority component of natural gas, in which it combines with gaseous oxygen to form gaseous carbon dioxide and gaseous water.

    asked on November 6, 2012
  9. balanced equation

    ? MnO4– + ?H+ + ?C2O42– --> ?Mn2+ + ?H2O + ?CO2 what's the balanced equation? correct coefficients? is it 1MnO4- + 2H+ + 1C2O42- --> 1Mn2+ + 1H20 + 2CO2 ? c2042..? are you missing parenthesis somewhere? oh i see, no i believe this is correct: MnO4- +

    asked on April 29, 2007
  10. Chemistry

    Suppose you have two solutions to titrate with NaOH: (a) 10 ml of.1M HCL (b) 10 ml of .1M CH3COOH would you expect either of the solutions to require different volumes of NaOH in order to reach an end point? Explain

    asked on December 9, 2011
  11. Math

    Find the radius of a sphere with a volume of 1,767.1 m (3 cubed) would I use the formula V=4/3*pie*radius (3 cubed)

    asked on October 29, 2014
  12. physcial science

    What are the wavelength limits of the audible range of the sound spectrum? (Use the speed of sound in air. The speed of sound in air is 344 m/s. The audible range of the sound spectrum contains frequencies as low as 30 Hz and as high as 25 kHz.)

    asked on June 23, 2015
  13. chemistry

    Write a net ionic equation for the reaction of the aqueous species ammonia and hydrofluoric acid. I don't think mine is coming out right- I don't know how NH3 reacts with other species, because I end up getting hydrogen as both an anion and a cation in the

    asked on April 29, 2007
  14. Physics!

    The following four forces act on 4.00 kg object: F1 = 300 N east F2 = 700 N north F3 = 500 N west F4 = 600 N south What is the acceleration of the object?

    asked on November 1, 2011
  15. Chemistry

    Write the dissociation equation for iron(II) ammonium sulfate hexahydrate in water . Fe(NH4)2(SO4)2 * 6H2O --> __?________ I know dissociate means to take apart so for example; NaCl would look like Na^+ + Cl^- And another one like: Fe2(SO4)3 would look

    asked on October 4, 2015
  16. Chemistry

    Write a balanced equation for the incomplete combustion of gaseous pentane (C5H12) which combines gaseous oxygen to form carbon dioxide, gaseous water and carbon monoxide.

    asked on November 6, 2012
  17. Chemistry - Rate Determining Step

    The rate law for the reaction 2NO (g) + Cl2 (g) -> 2NOCl (g) is given by rate = k[NO][Cl2] A mechanism involving the following steps has been proposed for the reaction: NO (g) + Cl2 (g) -> NOCl2 (g) NOCl2 (g) + NO (g) -> 2NOCl (g) If this mechanism is

    asked on February 6, 2007
  18. Chemistry

    what is the difference between a basic bunsen burner and the tirrll burner

    asked on September 24, 2010
  19. Chemistry

    Which type of intermolecular forces would be expected in a sample of F2 gas? a. London forces, dipole interactions, and ionic interactions b. dipole interactions c. London forces d. London forces and dipole interactions I believe C is the correct answer.

    asked on June 13, 2018
  20. Physics

    A 1000-kg car is driving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a rest in a distance of 140 m. What is the constant force applied to the car to bring it to rest?

    asked on November 1, 2011
  21. essay edit

    Can someone look over this? I've been working on wordiness, sentence structure, and repetition. Tangled and its Hidden Critique of Rapunzel Peeking at the mere surface of the film Tangled (2010) directed by Nathan Greno and Brian Howard, most would presume

    asked on November 2, 2014
  22. equilibrium concentration

    A standard solution of FeSCN2+ is prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN. The equilibrium concentration of FeSCN2+ ([FeSCN2+]std) for this standard solution is assumed to be ? M. Wouldn't that be 0.002 x 1/11 = ??

    asked on April 4, 2007
  23. Biochemistry

    An enzyme-catalyzed reaction was carried out in a 0.2M �Tris� buffer, pH 7.8. As a result of the reaction, 0.03 mole/liter of H+ was produced. (pKa of Tris =8.1) (a) What was the ratio of Tris+ (conjugate acid) / Triso (Conjugate base) at the start of

    asked on June 26, 2016
  24. High School Math

    Write an equation for the sentence below. Then solve the equation. Thirteen multiplied by h is one hundred and four. A. 13h = 104; 91 B. 104h = 13; mc011-1.jpg C. mc011-2.jpg; 1,352 D. 13h = 104; 8 I chose A and it;s not right could it be D

    asked on October 3, 2012
  25. physics

    1.) A small sphere of charge 2.4 μC experience a force of 0.36 N when a second sphere of unknown charge is placed 5.5 cm from it. What is the charge of the second sphere? 2.) Two identically charged sphere placed 12 cm apart have an electric force of0.28

    asked on March 20, 2011
  26. chemistry

    equilibrium pressure at 731 K for the reaction H2+I2-2HI initially the mixture contains 0.08592 each of H2 and I2 and 1.0atm.what is the pressure of HI at equilibrium?

    asked on July 10, 2012
  27. Physics

    Planet Jupiter revolves around the Sunin 12 years (3.79 X 10^8 sec. What is its mean distance from center of Sun? mass of sun is 1.99 x 10^30 kg.

    asked on June 17, 2012
  28. math

    using two fair dice, what is the probability of rolling a sum that exceeds 4?

    asked on March 12, 2012
  29. Physics

    Two balls undergo inelastic collision. The y-momentum after the collision is 98 kilogram meters/second, and the x-momentum after the collision is 100 kilogram meters/second. What is the magnitude of the resultant momentum after the collision?

    asked on June 15, 2012
  30. Physics

    A fisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. It takes 2.90 s for the boat to travel from its highest point to its lowest, a total distance of 0.640 m. The fisherman sees that the wave

    asked on November 20, 2007
  31. Economics

    Four roommates are planning to spend the weekend in their dorm room watching old movies, and they are debating how many to watch. Here is their willingness to pay for each film: Orson Alfred Woody Ingmar Frist film 7 5 3 2 Second film 6 4 2 1 Third film 5

    asked on September 30, 2006
  32. Physics

    A block weighing 6.8 N requires a force of 2.5 N to push it along at constant velocity. What is the coefficient of friction for the surface? A weight W is now placed on the block and 4.6 N is needed to push them both at constant velocity. What is the

    asked on January 8, 2011
  33. math

    If a and b are positive integers and their product is 3 times their sum, what is the value of 1/a + 1/b? Given that ab = 3(a + b). From this, ab/3 = a + b. Dividing through by ab yields 1/a + 1/b = 1/3.

    asked on June 30, 2005
  34. physics

    the following point charges are placed on the x-axis: +2.0μC at x=20cm,-3.0μC at x=30cm and -4.0μC at x=40cm. What is the potential at x=0?

    asked on November 19, 2015
  35. Chemistry

    Write the dissociation equation for iron(II) ammonium sulfate hexahydrate in water . Fe(NH4)2(SO4)2 * 6H2O --> __?________ I know dissociate means to take apart so for example; NaCl would look like Na^+ + Cl^- And another one like: Fe2(SO4)3 would look

    asked on October 4, 2015
  36. Chemistry

    You have the following acids and their conjugate bases available: Acetic Acid: CH 3COOH/CH3COO-; Ka = 1.8 × 10-5 Carbonic Acid: H2CO3/HCO3-; Ka = 4.2 × 10-7 Hydrofluoric acid: HF/!@#$%^&a = 7.2 × 10-4 Which of these acid/conjugate base pairs would be

    asked on June 13, 2018
  37. 5th grade Math

    A recipe call for the following ingredients: 3c flour 1/2t salt 3/4c sugar 4c fruit 2T butter To make 2/3 of the recipe, how much of each ingredient should you use. Question, should I multiply of divide by 2/3?

    asked on September 20, 2014
  38. Physics(class) /Math (problem)

    Moe earns 15% more than her husband Joe. Together they make 78000 per year. What is Joe’s annual salary? Answer to two significant figures. My answer was $31000, but the program doesn't seem to want to take it. Did I do something wrong?

    asked on October 3, 2012
  39. math

    A cup of brewed tea has 54 milligrams less caffeine than a cup of brewed coffee. If a cup of tea has 66 milligrams of caffeine, how much caffeine is in a cup of coffee?

    asked on October 14, 2013
  40. Physics Problem

    The portion of string between the bridge and upper end of the fingerboard (the part of the string that is free to vibrate) of a certain musical instrument is 60.0 cm long [.6m] and has a mass of 2.23 g [.00223kg]. The string sounds an A4 note (440 Hz) when

    asked on November 19, 2007
  41. physcial science

    Picnickers see a lightning flash and hear the resulting thunder 7.9 s later. If the storm is traveling at a rate of 20. km/h, how long, in minutes, do the picnickers have before the storm arrives at their location?

    asked on June 23, 2015
  42. physics

    A 70.0 kg climber is supported in the "chimney" by the friction forces exerted on his shoes and back. The static coefficients of friction between his shoes and the wall, and between his back and the wall, are 0.760 and 0.610, respectively. What is the

    asked on October 26, 2009
  43. Math

    The dimensions of a gift box are consecutive positive integers such that the height is the least integer and the length is the greatest integer. If the height is increased by 1 cm, the width is increased by 2 cm, and the length is increased by 3 cm, then a

    asked on June 7, 2009
  44. chem 2

    what is the mass of F in grams in 24.6 grams of SnF2? Convert 24.6 g SnF2 to mols SnF2. Convert mols SnF2 to mols F atoms. Convert mols F atoms to grams F atoms. 24.6 g SnF2*(1 mol SnF2/molar mass SnF2)*(2 mols F/1 mol SnF2)*(atomic mass F/1 mol F Atoms) =

    asked on July 16, 2007
  45. Math

    The Wildcats basketball team scored 18 points in the first half of the game. All the points came from either 2 or 3 point baskets. If a total of 8 shots were made ( some two pointers and some three points), how many of each type of shot were made?

    asked on September 3, 2015
  46. physics

    A piano is being moved into a concert hall up a 15m ramp that has a final height of 1.5m. To help with the weight, a rope has been tied between the piano and a counterweight through two pulleys. One at the top of the ramp and the other off the edge of the

    asked on December 20, 2012
  47. chem

    a 6.54 g sample consisting of a mixture of silver nitrate and sodium nitrate is dissolved in water. this mixture then reacts with barium chloride to for 3.50 g of silver chloride. calculate the percent by mass of silver nitrate in the first mixture

    asked on December 14, 2010
  48. phys

    A long distance swimmer is able to swim through still water at 4km/hr. She wishes to swim from Port Angeles, WA due north to Victoria, B.C., a distance of 50km. An ocean current flows through the Strait of Juan de Fuca from west to east at 3km/hr. In what

    asked on October 19, 2008
  49. PHYSICS

    A stone is dropped from the top of a cliff and one second latter a second stone is thrown vertically downward with a velocity of 20m/s. How far below the top of the cliff will the stone overtake the first?

    asked on May 29, 2016
  50. Chemistry

    The density of water at 30*C is 0.9956g/mL. If the specific gravity of acetic acid is 1.040 at 30*C, what is the density of acetic acid at 30*C?

    asked on February 23, 2015
  51. oxidation

    In the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water, the oxidizing agent is... ? Fe(II) ==> Fe(III) H2O2 ==> H2O. Fe goes from +2 to +3, that is a loss of electrons, so it is oxidized (by definition,

    asked on April 19, 2007
  52. Science:Biology

    What are some unusual characteristics of food webs in agroecosystems?

    asked on January 5, 2016
  53. Science

    What processes must a stone undergo if it is to be made ready for use in jewelry?

    asked on October 21, 2007
  54. Chemistry

    Using the information below, which answer lists the salts in order of increasing solubility? PbSO4 Ksp = 1.6 x 10^-8 PbS Ksp = 8 x 10^-28 PbI2 Ksp = 7.1 x 10^-9 PbCl2 Ksp = 1.6 x 10^-5 a. PbS < PbI2 < PbSO4 < PbCl2 b. PbI2 < PbCl2 < PbS < PbSO4 c. PbCl2 <

    asked on June 13, 2018
  55. Statistics

    A student is taking a multiple-choice exam with 16 questions. Each question has five alternatives. If the student guesses on 12 of the questions, what is the probability she will guess at least 8 correct? Assume all of the alternatives are equally likely

    asked on May 14, 2008
  56. Finance

    Ngata Corp. issued 19-year bonds 2 years ago at a coupon rate of 9.6 percent. The bonds make semiannual payments. If these bonds currently sell for 107 percent of par value, what is the YTM?

    asked on December 1, 2016
  57. statistics

    assume that a set of test scores is normally distributed with a mean of 100 and a standard devaiton of 20. Use the 68-95-99.7 rule to find the following quantities: a. percentage of scores greater than 120

    asked on May 16, 2010
  58. chem

    I have a few questions. 1. write the net ionic equation for a precipitate when solutions of magnesium nitrate and potassium hydroxide form. When I did this equation out, both products were soluble. Am I doing this wrong? 2. A 50.00 mL sample of .0250 M

    asked on October 19, 2006
  59. chem

    When an electric discharge is passed through boron trichloride a new compound is formed. what is its simplest formula if on analysis it is shown to contain .0878 g of chlorine and .0131 g of boron?

    asked on December 15, 2010
  60. Chemistry

    student perform 2 melting point determinations on a crystalline product. In one determination, the tube contained a sample 1 - 2 mm in height, and the melting point was 141 - 142 ¢ªC. In the second determination, the sample hight was 4 - 5 mm and the

    asked on September 1, 2009
  61. math

    there are 12 men on a basketball team, and in a game 5 of them play at any one time. if the game is 1 hr long and if each man plays exactly the same amount of time how many minutes does each man play? a) 10 b) 12 c) 24 d) 25 e) 30 b) 12 NO. Its d) 25. With

    asked on June 29, 2005
  62. Chemistry

    In the chemical reaction where N2O4(g) is converted to 2NO2(g), if 0.5 M N2O4 and 0.15 M NO2 are present in the vessel, is the reaction at equilibrium? If not, which direction would the reaction proceed? (Kc = 4.4 × 10-3) N2O4(g) 2NO2(g) a. No, Q = 4.5

    asked on June 13, 2018
  63. chemistry

    A balloon is filled with hydrogen gas. reaction is Fe(s) + H2SO4(aq) ----> FeSO4(aq) + H2(g). The volume of the ballon was 4800 m cubed and the loss of hydrogen gas during filling was estimated at 20.% What mass of iron splints and 98% by mass H2SO4 were

    asked on April 6, 2017
  64. PHYSICS

    a mass of 3kg rests on smooth horizontal table connected by a light string passion over a smooth pulley at the edge of the table to another mass of 2kg hanging vertically. when the system is released from rest with what acceleration do the masses move and

    asked on June 21, 2016
  65. chemistry

    at 25 celcius, how many dissociated OH ions are there in 8.0x10^-1 L of aqueous solution with pH 4.73?

    asked on November 16, 2015
  66. Chemistry

    The percentage composition of chlorine, by mass, in the compound K2PtCl4 is

    asked on August 18, 2010
  67. algebra

    What is the width of a rectangle with a perimeter of 70 feet if its length is 1 foot? 2 feet? L.feet? perimeter = 2(length + width) If perimeter = 70 then 35= length + width Now substitute 1,2,and L and solve for width. how do you find the L. feet? L is

    asked on September 12, 2006
  68. CHEMISTRY HELP

    Reaction: 1/2N2 + 3/2H2 --> NH3 Delta H = -46Kj/mol 1) Find delta H n(NH3)formed=5 mol. M(NH3=8.5g) 2) Find delta H a)3 mol H2 + 3 mol N2 b) 3 mol H2 + 0.5 mol N2 M NH3 = 17 g/mol ???

    asked on September 24, 2016
  69. PHYSICS

    A ball is dropped onto the floor from a height of 20m. It rebounds to a height of 15m. If the ball was in contact with the floor for 0.01sec what was its average acceleration during the contact take g=10m/s

    asked on May 28, 2016
  70. Physics

    Skier A of mass 71kg slides down a slope and makes a completely inelastic collision with Skier B, who is stationary, and has a mass of 55kg.Immediately after the collision both skiers have a speed of 5.8m/s. a)Find the speed of skier A immediately before

    asked on October 25, 2015
  71. Physics

    A motorcycle rider plans to make a jump off a ramp. If he leaves the ramp with a speed of 38.0m/s and has a speed of 36.3m/s at the top of his trajectory, determine his max height above the end of the ramp. Ignore friction and air resistance. i got 6.45m

    asked on October 25, 2015
  72. math

    2. Simplify. Please be sure to show all of your work. -3(-9) – |-5 – 3 3. Simplify. Please show all of your work 9c^3+7c-(3c^3-12+c) 4. Solve 4x- 3(5x-8) =23-9(x+2) . Please show all of your work 5. Solve the following equation for z. Please show all

    asked on August 15, 2011
  73. 4th grade

    need help with edhelperku puzzle

    asked on November 4, 2009
  74. english/polsci essay excerpt edit

    Can someone edit this? Also, does anyone edit whole papers? (Essay redacted per request from original poster.)

    asked on May 3, 2015
  75. PHYSICS

    A 70 kg student traveling in a car with a constant velocity has a kinetic energy of 1.4 104 J. What is the speedometer reading of the car in km/h?

    asked on February 20, 2011
  76. Physics

    The gravitational potential difference between the surface of a planet and a point P, 10 m above the surface, is 8.0 J kg-1. Assuming a uniform field, what is the value of the gravitational field strength in the region between the planet’s surface and

    asked on January 19, 2011
  77. statistics

    assume the body temperature of healthy adults distributed with a mean of 98.20F and a standard deviation of 0.62F. If you have a body temperature of 99.00F, what is your percentile score?

    asked on May 16, 2010
  78. pre-calc

    How bright a star appears can depend on how much light the star actually emits and how far away it is. The stellar magnitude scale can be adjusted to account for distance as follows: m_2 - m_1 = log (b_1/b_2) Here, M refers to a star's absolute magnitude,

    asked on May 16, 2009
  79. math (pre cal)

    find the domain and range of y=|5x^3+8|-2

    asked on August 16, 2018
  80. Chemistry

    What is the solubility of PbI2 in 0.4 M KI given the solubility constant of PbI2 is 7.1 x 10-9 a. 3.5 x 10-3 M b. 1.2 x 10-3 M c. 4.4 x 10-8 M Ksp = 7.1 x 10-9 Ksp = x * (2 * 0.4) (7.1 * 10-9)/.8 = x 8.8 x 10-9 = x ------ But this is not one of the

    asked on June 13, 2018
  81. Chemistry (Help!)

    Reaction: 1/2N2 + 3/2H2 --> NH3 Delta H = -46Kj/mol 1) Find delta H n(NH3)formed=5 mol. M(NH3=8.5g) 2) Find delta H a)3 mol H2 + 3 mol N2 b) 3 mol H2 + 0.5 mol N2 M NH3 = 17 g/mol ???

    asked on September 24, 2016
  82. physics 1401!

    A closed-end tube is evacuated and placed with its open end beneath the surface of a reservoir of water. The water rises to a height of 9.5 m. If the density of water is 1000 kg/m^3, what is the pressure at the bottom of the column of water?

    asked on July 7, 2015
  83. physics

    shuffleboard disk is accelerated at a constant rate from rest to a speed of 6.0 m/s over a 1.5 m distance by a player using a cue. At this point the disk loses contact with the cue and slows at a constant rate of 3.5 m/s2 until it stops. (a) How much time

    asked on September 25, 2012
  84. Advance Math

    The path around a square flower bed is 3 feet wide. If the area of the flower bed is equal to the area of the path, find the dimensions of the flower bed.

    asked on February 18, 2009
  85. Geography

    1) What is the relationship between an ecozones GDP and area? 2) What is the relationship between an ecozones GDP AND population? ..please help. I thank you in advance. These sites have information that should help you.

    asked on May 23, 2007
  86. maths

    the angle of elevation of a top of a tree from point P on horizontal ground is 30 degrees.Fromanother point Q 8 METRES FROM THE BASEof the tree,the angle of elevation of the top of the tree is 48 degrees. a)calculate to one decimal place the height of the

    asked on April 21, 2019
  87. MATH HELP!!

    Consider the three points A(2,3,1) B(1,-2,3) C(7,4,6) a) Show that ABC is a right triangle. b) Calculate the area of this triangle. c) Find the coordinates of the center of the circle circumscribed about triangle ABC

    asked on September 28, 2016
  88. physics

    A truck accelerates uniformly from rest to 21.5m/s in 5.7sec along a level stretch of road. Determine the average power required to accelerate the truck for the following values of the weight (ignore friction) a) 1.00x10^4 N b) 1.45x10^4 N I used constant

    asked on October 26, 2015
  89. chemistry

    What volume (in Liters) of oxygen must react to form 17.0L of carbon dioxide according to the following balanced equation: 2CO(g) + O2(g) --> 2CO2(g) 17.0 L CO2 x (1 moles O2/2 moles CO2) = 17.0 x (1/2) = 8.5 L did i do this problem correctly

    asked on October 17, 2010
  90. Physics

    space shuttle travels at about 7.4581x10^3 m/s. An astronaut takes about 1.5933x10^2 ms to blink an eye. How far does the space shuttle travel in that time, expressed to 4 significant figures?

    asked on October 14, 2010
  91. physics

    A block of mass 39 kg lies on an inclined plane, as shown. The horizontal and vertical supports for the plane have lengths of 36 m and 15 m, respectively, and the coefficient of kinetic friction between the plane and the block is 0.3. The magnitude of the

    asked on October 6, 2010
  92. physics

    A descending elevator of mass 670 kg is uniformly decelerated to rest over a distance of6 m by a cable in which the tension is 8683 N.The acceleration due to gravity is 9.8 m/s2.Calculate the speed vi of the elevator at the beginning of the 6 m descent.

    asked on October 6, 2010
  93. Chemistry

    a dose of asprin of 5.0mg per kilogram of body weight has been perscribed to reduce the fever of an infant weighing 8.0 pounds one pound is 453.59g what is the number of milligrams of asprin that should be administered

    asked on September 29, 2010
  94. 7th grade

    What is the definition of the word "hamebells" from the book "The Red Pony" by Steinbeck. I have searched all dictionary sources I could and can't seem to find out anythin on it. Is it, perhaps, a slang word for something else?

    asked on September 9, 2009
  95. chemistry

    How many electrons are transferred in the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water? i'm not sure if iposted this already... sorry if i did :) Fe^+2 ==> Fe^+3 + e 2e + 2H^+ + H2O2 ==> 2H2O Multiply

    asked on April 22, 2007
  96. molarity

    calculate the molarity of k+ in a soln prepared by adding .2L of .200M K3PO4 and 75.0mL of .5M K3PO4. assume volumes are additive. A few of steps here and more than one way to answer the problem You need to calculate the total number of moles of K3PO4 from

    asked on April 5, 2007
  97. math problem

    the circle graph at the right shows eye colors of the students in Mr.Chare's 4th hour class. If 7 students have either green or hazel eyes, how many students are there in the class? Circle graph is.. 12% gray 24%hazel 4% green 36% brown 24% blue I need

    asked on August 30, 2006
  98. Chemistry

    Three unknown solutions were prepared by pipetting 15.00 mL of an unknown nickel solution into a 200.00 mL volumetric flask and diluting to the mark. Then three samples were prepared from this dilute unknown solution by pipetting 5.00 mL of the dilute

    asked on January 14, 2018
  99. physics

    two point charges +q and -q are separated by a distance d. aside from infinity, where else is the potential due to these two charges 0?

    asked on November 19, 2015
  100. Chemistry Need Help

    How many grams of baking soda, NaHCO3, are needed to react with 125 mL of stomach acid having an HCl concentration of 0.05984 M? The reaction is NaHCO3(aq) + HCl(aq) → NaCl(aq) + CO2(g) + H2O(l). Do I need to chenage mL to L first? I'm really stuck with

    asked on March 1, 2015

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