Most popular questions and responses by tanner
  1. Chemistry

    A gas is confined to a cylinder under constant atmospheric pressure, as illustrated in the following figure. When the gas undergoes a particular chemical reaction, it absorbs 827 J of heat from its surroundings and has 0.66 kJ of P−V work done on it by

    asked on October 14, 2015
  2. Calculus

    Find constants a and b in the function ax^b/ln(x) such that f(1/5)=1 and there is a local min at x=1/5

    asked on October 20, 2015
  3. Physics

    Two spherical objects with a mass of 2.88 kg each are placed at a distance of 2.12 m apart. How many electrons need to leave each object so that the net force between them becomes zero?

    asked on June 7, 2012
  4. chemistry

    The solubility products of AgBr and Ag3PO4 are 5.0 10-13 and 1.8 10-18, respectively. If Ag+ is added (without changing the volume) to 1.00 L of a solution containing 0.31 mol Br ‾ and 0.31 mol PO43-, calculate the molarity of Ag+ ions required to

    asked on March 25, 2012
  5. Chemistry

    A solution of H2SO4(aq) with a molal concentration of 1.66 m has a density of 1.104 g/mL. What is the molar concentration of this solution?

    asked on April 29, 2013
  6. Physics

    A motor takes 5 s to go from 30 rad/s to 130 rad/s at constant angular acceleration. The total angle through which its shaft turns during this time is... A. 400 rad B. 320 rad C. 640 rad D. 800 rad E. 1600 rad F. None of the above

    asked on November 10, 2016
  7. math

    Hi There- I really need help with this. I'm kind of confused and don't have an answer. if you could explain it ill give you my answer once I understand it. how does the product of a fraction and a whole number compare to the whole number? A. the product is

    asked on December 19, 2018
  8. Physics

    Romeo is chucking pebbles gently up to Juliet's window and he wants the pebbles to hit the window with only a horizontal component of velocity (the least possible speed). He is standing at the edge of a rose garden at H = 4.62 m below her window and at D =

    asked on January 21, 2015
  9. Chemistry

    use the Ksp of SnS2= 1.0X10^-70 and calculate the pH of a hydrogen sulfide solution needed to precipitate 99.99% of the tin(IV) ion assuming [Sn^4+]=0.05M and that [H2S]=0.10M.

    asked on March 25, 2012
  10. English

    After Victor recovers from the first of the several emotional and physical breakdowns, he is feeling much better and enjoying the fine spring weather in Ingolstadt. However, he receives a letter from Geneva that A. tells him that Elizabeth has decided to

    asked on May 28, 2015
  11. physics

    A baseball thrown at an angle of 45 degrees above the horizontal strikes a building 18 m away at a point 8 m above the point it is thrown. Find the time taken by the ball to hit the building. Can someone please show me how to set the problem up?

    asked on September 27, 2016
  12. Physics

    A golfer, standing on a fairway, hits a shot to a green that is elevated 5.50 m above the point where she is standing. The ball leaves her club at an angle of 37.0° above the ground, with a speed of 31.1 m/s. Find the time that the ball is in the air

    asked on February 1, 2015
  13. pre calculus

    Use Hooke's Law for springs, which states that the distance a spring is stretched (or compressed) varies directly as the force on the spring. A force of 265 newtons stretches a spring 0.15 meter. (a) What force is required to stretch the spring 0.2 meter?

    asked on October 2, 2014
  14. Help PHYSICS

    (a) If your relaxed eye has a refractive power of 56.0 D, and your lens-to-retina distance is 2.35 cm, determine if you are nearsighted or farsighted. (b) If you are nearsighted, determine your far point. If you are farsighted, determine your near point.

    asked on December 1, 2017
  15. Math

    About 3/4 of the track team are girls. About 3/4 of these girls are in 8 th grade. What fraction of th e students are grade 8 girls? 1/3?

    asked on November 14, 2010
  16. Physics

    If a curve with a radius of 91.5 m is perfectly banked for a car traveling 77.4 km/h, what must be the coefficient of static friction for a car not to skid when traveling at 91.6 km/h?

    asked on February 11, 2015
  17. chemistry

    A container is charged with hydrogen, nitrogen, and ammonia gases at 120°C and the system was allowed to reach equilibrium. What will happen if the volume of the container is increased at constant temperature? 3H2(g) + N2(g) 2 NH3(g)

    asked on February 27, 2012
  18. Chemistry HEAT OF FUSION

    What is the final temperature, in oC, after a 15.0 g piece of ice, at 0oC, is placed in a styrofoam cup with 128 g of water initially at 74.0oC. Assume there is no transfer of heat to or from the surroundings. The specific heat of water = 4.184 JK-1g-1 The

    asked on October 6, 2011
  19. Math

    The length of a rectangular board is 10 cm longer than its width. The width of the board is 26 cm. the board is cut into 9 equal pieces. What is the area of each piece? What are the possible dimensions of each piece?

    asked on October 1, 2014
  20. Chemistry HEAT OF FUSION

    What amount of energy is required to melt a 26.9 g piece of ice at 0oC? The heat of fusion of ice = 333 Jg-1 Heat required to melt the ice = J What amount of energy must be removed from 120 g of water to cool it from 72.1oC to 12.4oC? Specific heat of

    asked on October 6, 2011
  21. chemistry

    What pressure would be required for neon at 25 degrees C to have the same density as argon at 25 degress C and 1.00 atm?

    asked on November 5, 2012
  22. Physics

    A sports car moving at constant speed travels 150 meters in 5.4 seconds , then brakes and comes to a stop in 3.9 seconds What is the magnitude of its acceleration in ? What is the magnitude of its acceleration in g's (g= 9.80 m/s^2 )?

    asked on January 20, 2013
  23. chemistry

    Calculate the pH range required to separate 99.99% of Cr3+ from Zn2+ by precipitation of Cr(OH)3(s) in a solution that is initially 0.034 M in both Cr3+ and Zn2+. Use the Ksp values from Table 16.2 of Chang and calculate the pH to the nearest 0.01 pH unit.

    asked on March 25, 2012
  24. Chemistry

    A solution containing Pb2+ and a solution containing IO3- are poured together and quickly mixed. After mixing, the solution contains 0.0030 M Pb2+ and 0.040 M IO3-. Immediately Pb(IO3)2(s), which has Ksp=2.510-13, begins to precipitate. Calculate the free

    asked on March 5, 2012
  25. Chemistry

    Consider the following equilibrium reaction: NaHCO3(s) Na2CO3(s) + H2O(g) + CO2(g) When 100 g of sodium hydrogen carbonate are added to a reaction vessel, the temperature is increased to 200°C, and the system comes to equilibrium. What happens to the

    asked on February 27, 2012
  26. chemistry

    If 29.0 mL of 0.10 M Ba(NO3)2 are added to 76.0 mL of 0.21 M Na2CO3, will BaCO3 precipitate? Calculate Q

    asked on March 5, 2012
  27. physics

    A wave of amplitude 0.37 m interferes with a second wave of amplitude 0.18 m is traveling in the same direction. What is the largest resultant amplitude that can occur?

    asked on January 16, 2011
  28. physics

    : A 50kg wooden crate rests on a horizontal concrete floor. The coefficient of friction is u=0.7. What is the magnitude of the frictional force?

    asked on September 15, 2010
  29. Chemistry

    Ethanol (C2H5OH) boils at a temperature of 78.3oC. What amount of energy, in joules, is necessary to heat to boiling and then completely vaporize a 22.8 g sample of ethanol initially at a temperature of 16.5oC. The specific heat of ethanol is approximately

    asked on October 6, 2011
  30. Physics

    A 18.6 kg monkey hangs from a cord suspended from the ceiling of an elevator. The cord can withstand a tension of 202 N and breaks as the elevator accelerates. What was the elevator's minimum acceleration? (in m/s^2)

    asked on February 11, 2015
  31. Physics

    How many revolutions per minute would a 15.6 m diameter Ferris wheel need to make for the passengers to feel "weightless" at the topmost point? Do not enter unit.

    asked on February 11, 2015
  32. Physics

    A projectile is launched with an initial speed V0. At its highest point, the projectile's speed is V0/2 . What was the launch angle above the horizontal? (in deg)

    asked on February 1, 2015
  33. Physics

    Eddie the Eagle, British Olympic ski jumper, is attempting his most mediocre jump yet. After leaving the end of the ski ramp, he lands downhill at a point that is displaced 62.2 m horizontally from the edge of the ramp. His velocity just before landing is

    asked on February 1, 2015
  34. Physics

    What is the y-component of a vector in the x-y plane whose magnitude is 87.8 and whose x-component is 64.9?

    asked on January 21, 2015
  35. physics

    A football is kicked at ground level with a speed of 15.4 m/s at an angle of 34.7° to the horizontal. How much later does it hit the ground? (in s)

    asked on January 21, 2015
  36. math

    If the temperature at 10 o'clock is 46 degrees ,at noon it is 54 degrees, 2 o'clock it is 62 degrees, at 6 o'clock it is 60 degrees what would the temperature at 4 o'clock be

    asked on April 11, 2013
  37. Chemistry

    You are planning an experiment that requires 0.0610 mol of nitrogen monoxide gas (NO). What volume would you need at STP? Answer in units of L

    asked on December 7, 2012
  38. Physics

    At what minimum speed must a roller coaster be traveling when upside down at the top of a circle so that the passengers will not fall out? Assume a radius of curvature of 8.47 m. (in m/s)

    asked on February 11, 2015
  39. Physics

    Vector A has magnitude 37 units and direction, counterclockwise from east, of 12.9 degrees. What is the value of its x component to 1 decimal place?

    asked on May 12, 2012
  40. chemistry

    What pressure would be required for neon at 25 degrees C to have the same density as argon at 25 degress C and 1.00 atm?

    asked on November 5, 2012
  41. chemistry

    What pressure would be required for neon at 25 degrees C to have the same density as argon at 25 degress C and 1.00 atm?

    asked on November 5, 2012
  42. chemistry

    Both Fe2+ and Cd2+ are precipitated by sulfide. However, they can be quantitatively separated through pH adjustment. You are given a solution containing 0.086 M Fe2+ and 0.062 M Cd2+. Calculate the [H+] range for a saturated H2S solution (ie, [H2S]=0.10 M)

    asked on March 25, 2012
  43. Chemisty

    Let's explore the efficiency of chloride ion precipitation in seperating Ag^+ from Pb^2+ in a solution. Suppose that [Pb^2+]= 0.045 mol/L and [Ag^+]= 0.084 mol/L. Calculate the chloride ion concentraion required to just start precipitation of Pb^2+ ion and

    asked on March 4, 2012
  44. Chemistry

    What concentration of chloride ion is required to precipitate 99.9% of the lead ion from a solution with [Pb^2+]= 0.045 mol/L ?

    asked on March 4, 2012
  45. Math

    How would I solve equations with variables on both sides? Please help!

    asked on February 11, 2013
  46. English

    Come up with a thesis statement which could be supported by 3 points using: humans and greed.

    asked on September 3, 2014
  47. Science

    A student heats 4.00 g of a blue compound, which reacts completely to produce 2.56 g of a white compound and an unknown amount of colorless gas. What is the mass of the gas? Answer?_________ Work area: Reactant (s) = Product (s)

    asked on November 30, 2009
  48. Math

    -4 - x = -5

    asked on May 13, 2016
  49. Finance

    Company is planning to buy a machinery at a cost of $20 million. This machine will be used for 10 years. The machine will bring additional revenue as follows: $10 million for first 6 years and $7 million for the last 4 years Expenses = 60% of revenue for

    asked on June 27, 2015
  50. Math


    asked on February 24, 2015
  51. Chemistry

    A solution is made by dissolving 0.624 mol of nonelectrolyte solute in 795 g of benzene. Calculate the freezing point and boiling point of the solution. Tf=_ˆC Tb=_ˆC

    asked on April 29, 2013
  52. social studies

    Nubia was a kingdom to the south of egypt true or false

    asked on November 6, 2011
  53. Business

    You have been retained to analyze how many check-in agents should be used at a check-in counter for a large hotel. During normal business hours, customers arrive at a rate of about 24 per hour, and it takes about 7 minutes to complete the check-in process.

    asked on May 14, 2011
  54. Algabra

    What is 2/5 of 6?

    asked on October 4, 2010
  1. English

    is it intimate

    posted on December 4, 2018
  2. Math help ms sue.

    What are the answers

    posted on November 1, 2018


    posted on August 28, 2018
  4. SS

    Exactly thank you. @Ms.Sue where is the help you are supposedly so glad to help us with?

    posted on December 7, 2016

    No its not, the answer is C: Haploid, and are made when haploid spores undergo mitosis.

    posted on March 7, 2016
  6. English


    posted on August 30, 2015
  7. Chemistry

    you have to know the initial grams before starting. its not given I have the same question and I can't do it

    posted on March 10, 2015
  8. chemistry

    First you need to find the limited reactant. You do this by dividing the 2.0 g of NaSO4 by it's molar mass as well as the 2.0 g of Calcium Sulfate dihyrdate (CaCl2 + 2H20) You'll find that the Calcium sulfate is the limited reactant. From there you Take

    posted on February 10, 2014
  9. nutrition and wellness

    basketball football and swimming

    posted on November 15, 2013
  10. math

    Explain why 61 degrees

    posted on April 11, 2013
  11. Geometry

    what are the 2 lengths on top and bottom of plot 1, and what is the length on plot 3. with the following info I can answer

    posted on March 3, 2013
  12. Math

    the common denominator for all of the fractions would be six. as long as you multiply or divide the top and the bottom with the same number you do not break any math rules. 2/3=(2*2)/(3*2)=4/6 1/2=(1*3)/(2*3)=3/6 4/12=(4/2)/(12/2)=2/6 and 5/6=5/6 order the

    posted on November 26, 2012
  13. math

    y'=2x-1 y'=0 when x is .5 at (.5,-.25) you have a local and global minimum. the global maximum would be infinity because the function is continuous on all real x and the parabola opens up.

    posted on November 26, 2012
  14. math

    A 100/(1+9*1)=10 b lim as t->infinity is 100 c the growth rate at time 0 is 9

    posted on November 26, 2012
  15. chemistry

    i figured it out but how do i get the Low end and High end?

    posted on March 25, 2012
  16. Chemistry

    well that's the ksp they gave in the question

    posted on March 25, 2012
  17. Schindler's List Essay

    this is garbage

    posted on December 8, 2011
  18. social studies

    The Nubians worshipped only one god

    posted on November 6, 2011
  19. english

    carefully defined is defined an adj or adverb?

    posted on January 15, 2010