1. chemistry

    If you submerge a silver teaspoon in copper sulfate solution, what reaction would you expect and why?
  2. chemistry

    Balance the following redox reaction by inserting the appropriate coefficients. H^+ +CrO4^2- +NO 2^- =Cr^3+ +H2O+NO3^-
  3. 7th grade chemistry

    how is potassium sulfate prepared?explain with chemical reaction.
  4. Chemistry

    Write a balanced redox reaction between mercury and bromine to form Hg2^2+.
  5. Chemistry--help me, please

    how would you separate Fe3+ from Ba2+ in a mixture? Please explain and give an equation for reaction.
  6. Chemistry

    what is the concentration of I- before the reaction when 35 ml of 0.23M KI is mixed with 15 ml of 0.15M Fe3+ 2I- + 2Fe3+ --> 2Fe2+ + I2
  7. Chemistry

    The value of H° for the reaction below is -482 kJ. Calculate the heat (kJ) released to the surroundings when 12.0 g of CO (g) reacts completely.
  8. chemistry

    Predict wheter or not the following reaction will be spontaneous, please explain Br2(l) + Cl2(l) + 29.3 kJ --> 2 BrCl(g)
  9. chemistry

    Discuss the spontaneity of an electrochemical reaction in terms of its standard emf (E¨¬cell)
  10. College Chemistry

    The eqm. Constant for a reaction is 2.48 at 25°C. what is the value of ΔG° (kJ) at this temperature? (R=8.314 J/k mol)
  11. Chemistry

    What is the balanced equation for the reaction including states? Does it form a precipitate? Cu(NO3)2 + KI
  12. College Chemistry

    The eqm. Constant for a reaction is 2.48 at 25°C. what is the value of ΔG° (kJ) at this temperature? (R=8.314 J/k mol)
  13. Math

    If an object is propelled upward fom a height of s feet at an initial velocity of v feet per​ second, then its height h after t seconds is given by the equation he=−16t squared + vt + ​s, where h is in feet. If the object is propelled
  14. Physics

    A blue car with mass mc = 410.0 kg is moving east with a speed of vc = 23.0 m/s and collides with a purple truck with mass mt = 1248.0 kg that is moving south with a speed of vt = 10.0 m/s . The two collide and lock together after the collision. 1)What is
  15. Chemistry

    Equation: Fe+CuCl2>FeCl2+Cu We put two iron nails into the copper chloride solution:1. mass of empty dry beaker:103.64 2. mass of two iron nails, before reaction:1.20 3. mass of two iron nails after reaction: 1.01 4. mass of beaker and copper
  16. Chemsitry

    How do you find the amount in moles of excess reactant that reamins Please retype that, minding your spelling. =) Can you please show me how to determine the amount in moles of excess reactant that remains Sorry about the mistakes =) This is part of an
  17. Chemistry-Repost for DrBob222

    My question was: A saturated solution of MgF2 at 23 degrees C was prepared by dissolving solid MgF2 in 1 L water. The Ksp of MgF2 is 1.5e-5. a.)Calculate the mass of MgF2 dissolved. b.) When .1 mols of solid KF was dissolved in the MgF2 solution,
  18. Biology

    Cellular Respiration and Photosynthesis co-exist as paired metabolic processes. Photosynthesis uses light energy to convert carbon dioxide into glucose, a simple sugar, in two steps, the light dependent and light independent reactions. Oxygen is produced
  19. physics

    A red ball is thrown down with an initial speed of 1.2 m/s from a height of 25.0 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 22.9 m/s, from a height of 0.8 meters above the
  20. Physics

    A red ball is thrown down with an initial speed of 1.3 m/s from a height of 28.0 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 24.7 m/s, from a height of 0.8 meters above the
  21. Chemistry

    I need to write a balanced equation for this problem and am having difficulty doing so. The question is this: use the mole ratio of CuO produced per mole of malachite to write a balanced equation for the malachite decomposition reaction. Assume that CO2 is
  22. chemistry

    A 0.500 L solution of 7.50 M hydrochloric acid is used to neutralize a 250.0 g sample of calcium hydroxide. Calcium chloride – a chemical used to control highway dust, strengthen concrete mixes, and add flavor to foods – is produced by the reaction. 2
  23. Chemistry

    Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to
  24. math

    Liz,John and Kim had some amount of money.Liz gives half of her amount to John, who then gives half of what he now has to Kim. Kim gives half of what she has now to Liz, who, now has exactly what she started with. If the sum of John's initial amount and
  25. Physics..please help

    A car is traveling at 20m/s when it pulls out to pass a truck that is traveling at only 18m/s. The car accelerates at 2.0m/s^2 for 4.0 s and then maintains this new velocity. First it asked me to calculate the distance during acceleration so I used d =
  26. managerial economicsQ3

    Suppose the inverse market demand equation is P = 80 ¡V 4(QA+QB), where QA is the output of firm A and QB is the output of firm B, and both firms have a constant marginal cost of $4 (fixed costs are zero). (a)Write down the profit equations for firms A
  27. math

    An initial-value problem is given by the differential equation, f(x,y)=x(1-y^2), y(1)=0.07 Use the Euler-trapezoidal method with a step-size h = 0.1, to obtain the approximate value of y(1.1). Give your answer to 4 decimal places.
  28. Calculus

    Use Euler's method with step size 0.2 to estimate y(1), where y(x) is the solution of the initial-value problem given below. (Round your answer to four decimal places.) y' = 1 − xy y(0) = 0 I don't even know how to start!
  29. physics

    A hockey puck sliding on a frozen lake comes to rest after traveling 265 m. If its initial velocity is 4.2 m/s, what is its acceleration (assumed constant)? Answer in units of m/s2.
  30. Physics

    A 42.0 kg swimmer with an initial speed of 1.50 m/s decides to coast until she comes to rest. If she slows with constant acceleration and stops after coasting 2.00 m, what was the magnitude of the force exerted on her by the water?
  31. Physics

    A .5 kg block is sliding along a tabletop with an initial velocity of .20 m/s. It slides to rest in a distance of .7m. Find the frictional force regarding it motion. The answer given is .0143 N but I do not understand how to get that.
  32. Physics

    I'm having a bit of trouble with this problem. A ball is thrown upwards and stays in the air for 3.65 seconds. What is the initial velocity? (I use an acceleration of -10 m/s/s) I got an answer of 18.25 m/s/s but I'm not sure that it's correct. I would
  33. Physics

    v(y)=v with letter y below normal line. "Explain why you can use the formula v(y)=g(t/2) to calculate the initial vertical velocity." My teacher claimed he explained the answer to this, but I didn't catch it. I would appreciate any help I get. THANKS!!!
  34. science

    A bullet is fired vertically upward with initial speed wo, at latitude ö. Neglecting air resistance, by what distance will it be displaced horizontally when it returns to the ground?
  35. Physics

    A 0.19 kg ball of dough is thrown straight up into the air with an initial speed of 13 m/s.The acceleration of gravity is 9.81 m/s. b) What is its momentum halfway to its maximum height on the way up? Answer in units of kg · m/s.
  36. Physic

    A ball is thrown upward. What is its initial vertical speed? The acceleration of gravity is 9.8 m/s^2 and maximum height is 7.2 m,. Neglect air resistance. Answer in units of m/s
  37. Math

    Joey kicks a football with an initial velocity of 42'/sec at an angle of 35 degrees to the horizon. what is the longest field goal he can make if the crossbar is 10' high?
  38. pre calculus

    You set up a business and make an initial investment of $10,000. The unit cost of the product is $2.85 and the selling price is $4.95. How many units must you sell to break even?
  39. physics

    The football is kicked over the goalpost with an initial velocity of vA=32 m/s as shown. Determine the point B (x,y) where it strikes the bleachers. type this question to google to find the figure. please and thank you.
  40. Physics

    During a soccer game two players come from the opposite directions and collide when trying to head the ball. They come to rest in midair and fall to the ground. Describe their initial moments?
  41. Physics (12th Grade)

    Equal volumes of monoatomic and diatomic gases of same initial temperature and pressure are mixed.What will be the ratio of sprcific heats of the mixture(Cp/Cv)?
  42. physics

    When you see a traffic light turn red, you apply the brakes until you come to a stop. Suppose your initial speed was 12.9 m/s, and you come to rest in 35.0 m. How much time does this take? Assume constant deceleration.
  43. Physics

    Use the Work-Energy Theorem to show that an object with initial velocity vo will travel a distance d across a rough horizontal surface before stopping, where d = vo2/(2mKg).
  44. Physics

    I'm having a bit of trouble with this problem. A ball is thrown upwards and stays in the air for 3.65 seconds. What is the initial velocity? (I use an acceleration of -10 m/s/s) I got an answer of 18.25 m/s/s but I'm not sure that it's correct. I would
  45. Physics Honors

    How long will it take a shell fired from a cliff at an initial velocity of 800 m/s at an angle 30 degrees above the horizontal to reach the ground 150 meters below?
  46. physics

    a ball is thrown upward what is its maximun height? its initial vertical speed is 8.1 m/s and the acceleration of gravity is 9.8 m/s . neglet air resistance . answer in units of m
  47. PHYISCS

    A ball is thrown upwards. What is its initial vertical speed? The acceleration of gravity is 9.8 m/s^2 and maximum height is 4.6 m ,. Neglect air resistance. Answer in units of m/s
  48. phyics

    When you see a traffic light turn red, you apply the brakes until you come to a stop. Suppose your initial speed was 12.9 m/s, and you come to rest in 35.0 m. How much time does this take? Assume constant deceleration.
  49. Physics

    A hockey puck sliding on a frozen lake comes to rest after traveling 160 m. If its initial velocity is 2.3 m/s, what is its acceleration (assumed constant)? Answer in units of m/s2.
  50. physics

    A ball is thrown upward.What is its maximum height? Its initial vertical speed is 11.5 m/s and the acceleration of gravity is 9.8 m/s2 . Neglect air resistance. Answer in units of m
  51. physics

    Please show work to how you find this answer. A baseball is thrown with an initial velocity of 30 m/s at an angle of 45 degrees. Neglecting air resistance, how far away will the ball land?
  52. Physics

    a rocket is launched at an angle of 53 degrees above the horizontal with an initial speed of 75m/s. It moves for 25 seconds along its line of motion with an overall acceleration of 25 m/s^2. What is its maximum height?
  53. Physics

    With an average acceleration of negative 1.2m/s squared, how long will it take a cyclist to bring a bicylcle with an initial speed of 6.5 m/s to a complete stop? answers are: either 2.0, 5.4. 0.18 or -1.8s Please help-I am totally confused
  54. Chemistry

    Suppose a student titrates a 10.00-mL aliquot of saturated Ca(OH)2 solution to the equivalence point with 13.65 mL of 0.0234 M HCl. What was the initial [OH − ]? What is the experimental value of Ksp?
  55. Physics

    The fisherman decelerates steadily to a stop in 20.6 s. What is the boat's acceleration, in m/s2, during this last portion of the trip? Initial velocity is 1.70 m/s. Use correct sig figs. The answer is not -0.0825?
  56. physics

    an arrow is shot into the air with an initial velocity of 100m is at elevation of 60 degree find. a the time of flight b the maximum height attained c the range
  57. physics

    A football is thrown upward at a(n) 23◦ angleto the horizontal. The acceleration of gravity is 9.8 m/s To throw a(n) 52 m pass, what must be the initial speed of the ball? Answer in units of m/s
  58. Chemistry

    A sample of sodium hydroxide of volume 11 mL was titrated to the stoichiometric point with 24.5 mL of 0.138 M HCl(aq). What is the initial molarity of NaOH in the solution? Answer in units of M.
  59. science

    A hockey puck sliding on a frozen lake comes to rest after traveling 272 m. If its initial velocity is 3 m/s, what is its acceleration (assumed constant)? Answer in units of m/s2
  60. analytical chemistry

    Calculate the concentration of the initial nitrate stock solution (in ppm) if exactly 0.361 g of KNO3 is dissolved in a 1 L volumetric flask with distilled water.
  61. physics

    An object is projected upward from the surface of the earth with an initial speed of 2 km/s. The acceleration of gravity is 9.81 m/s^2. Find the maximum height it reaches. Answer in units of km.
  62. physics

    a 8 kg ball is thrown upward with an initial speed of 20 m/s. suppose there is a constant air resistance of 30N opposing the motion during it entire up and down path. what is the acceleration on the way up and on the way down?
  63. Finance

    What is the amount of money created in the banking system due to an initial deposit of $1,000 if the required reserve is 5%? The banks are not holding any excess reserves.
  64. physics

    A rock is thrown straight upward with an initial velocity of 9.6 m/s in a location where the acceleration due to gravity has a magnitude of 9.81 m/s^2. To what height does it rise? i got 4.7 can you please show me how to solve for this last one
  65. Physics

    Using energy considerations and neglecting air resistance, calculate how far a rock will rise above its point of release if it is tossed straight up with an initial speed of 10m/sec. Using energy considerations and neglecting air resistance, calculate how
  66. Chemistry

    4. Use the information above to write net ionic equations for the two reactions that you have observed. 5. For each reaction, write the two half-reactions that make it up and calculate the overall reaction potential by adding the two half-reactions. Each
  67. Chemistry

    C. Consider the reaction 2C3H6 + 9O2 6CO2 + 6H2O. If the rate at which C3H6 is reacting is 0.40 mol liter−1s−1, then the rate at which 1. O2 is reacting is 1.6 mol liter−1s−1 2. CO2 is being formed is 0.40 mol liter−1s−1
  68. Finance

    ABC Mining is evaluating the introduction of a new ore production process. Two alter¬natives are available. Production Process A has an initial cost of $25,000, a 4-year life, and a $5,000 net salvage value, and the use of Process A will increase net cash
  69. Finance

    ABC Mining is evaluating the introduction of a new ore production process. Two alter¬natives are available. Production Process A has an initial cost of $25,000, a 4-year life, and a $5,000 net salvage value, and the use of Process A will increase net cash
  70. biology

    Please can you explain how to do the following: a) a non-smoker with low blood pressure has a plasma chloesterol concentration of 5mmol per litre. Over a period of time this concentration increases to 8mmol per litre. By how many times has this risk of
  71. Finance

    ABC Mining is evaluating the introduction of a new ore production process. Two alter¬natives are available. Production Process A has an initial cost of $25,000, a 4-year life, and a $5,000 net salvage value, and the use of Process A will increase net cash
  72. Chemistry

    1. The standard heat of formation of glucose and lactic acid are -1274.45 and -694.04 kJ/mole, respectively. The molar heat capacity of the two compounds are 218.86 and 127.6 J/(mol)K a.) What is the total heat of reaction at 25 degree Celsius for the
  73. chemistry

    A 1.0 M acetic acid solution (CH3COOH, pKa = 4.7) is neutralized by dissolving NaOH(s) (a strong base) in the solution. Estimate the pH at the equivalence point of the neutralization process: 4.7 7.0 9.3 Which one of the following statements best explains
  74. college physics

    If the initial tension in the string is (2.10+/- 0.02)N, what is the tension that would double the wave speed?
  75. physics

    The initial speed of a body is 6.64 m/s. What is its speed after 1.38 s if it accelerates uniformly at 4.7 m/s 2 ? Answer in units of m/s
  76. AP Calculus

    Find the particular solution to y ' = 2sin(x) given the general solution is y = C - 2cos(x) and the initial condition y(pi/2) = 1
  77. physics

    a basketball player can leap upward 0.5m. what is his initial velocity at the start of the leap?
  78. value

    A man goes 30km due north and then 40km due east. how far away is he away from his initial position?
  79. physics

    An object with an initial velocity of 5 m/s accelerates uniformly for 15 s. (a) If the final velocity is 37 m/s, what is the acceleration?
  80. physics

    A car travels 20 km southwards and then another 30 westwards. What is the displacement of the car from its initial position?
  81. physics

    A football is kicked 66.6 meters. If the ball is in the air 5.39 s, with what initial velocity was it kicked?
  82. Calculus-HELP!!!

    Find the complete general solution and a particular solution that satisfies the initial conditions: 2y'' + y' - 4y = 0 y(0)=0, y'(0)=1
  83. economics

    what is the rate of return on an initial investment of $2000 and you generate $500 return?
  84. Science

    how does the initial procedure compare to your updated procedure? What changes did you have to make? Why? How can I answer this question? Please help me... ;(
  85. Physics

    How do you find the max height of a projectile given the angle and Vi? Angle = 57.0 degrees Initial V = 46 m/s
  86. Physics

    A projectile was launched 64° above the horizontal, attaining a height of 10 m. What is the projectile's initial speed?
  87. chemistry

    Calculate the percent recovery of copper if: 7.26 g is the initial amount and 8.61 g is the amount recovered?
  88. Physics

    A particle of mass 2 kg has an initial velocity of (4.5i + 3.5j) m/s. It is acted on by a force (5i -2j) N for 2 s. What is its final velocity?
  89. physics

    A basketball player can leap upward 0.69 m. What is his initial velocity at the start of the leap?
  90. Math

    I need to have 20,000 in the bank after 1 year can you tell me what my initial deposit must be if I have a intrest rate of 4% a year.
  91. maine s

    what is the rate of return on an initial investment of $2000 and you generate $500 return?
  92. Calculus

    Solve the differential equation: dy/dx = (3x^2) / (y+1) with initial conditions x = -1, y = 2 I have: ∫y + 1 dy = ∫3x^2 dx (y^2 / 2) + y = x^3 + C (2^2 / 2) + (2) = (-1^3) + C? 4 = -1 + C 5 = c (y^2 / 2) + y = x^3 + 5 Is this correct?
  93. Physics

    An electron has an initial speed of 2.24 × 10^5 m/s. If it undergoes an acceleration of 2.2 × 10^14 m/s^2, how long will it take to reach a speed of 5.37 × 10^5 m/s
  94. physics

    The initial velocity of a projectile is 12i+13j in m\s. What is the displacement of a projectile at 0.25 seconds later?
  95. math

    Suppose a vector v has initial point (4, -3) and terminal point (8, -1). Find the magnitude of v
  96. Physics

    The initial speed of a body is 3.01 m/s. What is its speed after 3.89 s if it accelerates uniformly at 3.63 m/s 2 ? Answer in units of m/s
  97. math

    if a car has an initial velocity of 103m/s and acclerates at 1m/s for 3 seconds what will its final velocity be
  98. physics

    The initial speed of a body is 2.14 m/s. What is its speed after 1.87 s if it accelerates uniformly at 4.31 m/s^2? Answer in units of m/s
  99. physics

    A crate is given an initial speed of 2.9 up the 29 plane shown in the figure . Assume = 0.13 how far up the plane will it go?
  100. Economics

    Suppose the price elasticity of demand for a novel translated into English is perfectly inelastic. Assume the initial price of the novel is $24 and the quantity demanded is 222 copies per year. If the price of the novel increases by $3, then the quantity