Adrian

Popular questions and responses by Adrian
  1. Chemistry

    Pentane gas (C5H12) combusts with oxygen gas (O2) to form water (H2O) and carbon dioxide (CO2). Write a balanced chemical equation for this reaction and explain the scientific principle (statement) that requires the balancing of an equation to make it

    asked on March 7, 2012
  2. History

    Which of these BEST describes the Supreme Court case of Brown v. Topeka Board of Education? A) it reaffirmed the decision of Plessy vs Ferguson B) ruled that universities must be open to people of all races C) Kansas schools were to be desegregated as an

    asked on June 27, 2015
  3. history

    Which of the these BEST describes why the Zhou dynasty collapsed? A) feudal power structure that gave too much power to regional lords B) failure to keep up technologically with border cultures C) too much exposure to outside cultures through trade D)

    asked on October 22, 2019
  4. CHEMISTRY

    An ethanol-water solution is prepared by dissolving 10.00 ml ethanol C2H5OH (density=0.789g/ml) in sufficient water to produce 100.00 ml of solution with a density of 0.982g/ml. What is the concentration of ethanol in this solution? Expressed as ml.

    asked on November 13, 2013
  5. chemistry

    A solution contains 25.5 g of NaCl dissolved in sufficient water to give a total mass of 325.0 g. What is the molality of the solution

    asked on May 10, 2013
  6. finance

    3.The Lo Company earned $2.60 per share and paid a dividend of $1.30 per share in the year that just ended. Earning and dividend per share are expected to grow at a rate of 5% per year in the future. Determine the value of the stock:

    asked on February 16, 2014
  7. chemistry

    Use the balanced equation below to answer the following questions. 2Al(NO3)3 + 3Na2CO3 Al2(CO3)3(s) + 6NaNO3 - What is the ratio of moles of Al(NO3)3 to moles Na2CO3? (1 point) - If 852.04 g Al(NO3)3 reacted with the 741.93 g Na2CO3, which would be the

    asked on February 8, 2012
  8. Phtsics

    Two identical point charges are separated by a distance of 3.0 cm and they repel each other with a force of 4 X 10^-5 N. What is the new force if the distance between the point charges is doubled?

    asked on February 14, 2013
  9. thermodynamics (dont know what to do)

    0.05 kg of carbon dioxide (molecular weight = 44) is compressed from 1 bar, 15°!@#$%^&il the pressure is 8.3 bar, and the volume is then 0.004 m3. Calculate the change of entropy. Take cp for carbon dioxide as 1.0 kJ/kg K, and assume carbon dioxide to be

    asked on January 17, 2018
  10. Science, Physics

    A 800kg safe is 2.3m above a heavy-duty spring when the rope holding the safe breaks. The safe hits the spring and compresses it 52cm.What is the spring constant of the spring?

    asked on November 5, 2014
  11. chemistry

    A solution of ethanol, C2H5OH, is prepared by dissolving 25.0 mL of ethanol in enough water to give a total volume of 250.0 mL. What is the percent-by-volume concentration of ethanol?

    asked on May 10, 2013
  12. History

    "A ship lost at sea for many days suddenly sighted a friendly vessel. From the mast of the unfortunate vessel was seen a signal, “Water, water; we die of thirst!” The answer from the friendly vessel at once came back, “Cast down your bucket where you

    asked on June 27, 2015
  13. Science

    A pond is located beside an open mine. Mercury from the mine contaminates the river water. This is an example of

    asked on June 24, 2019
  14. Physics

    Consider a thin 34 m rod pivoted at one end. A uniform density spherical object (whose mass is 5 kg and radius is 3.6 m) is attached to the free end of the rod. The moment of inertia of the rod about an end is I rod =1/3 mL^2 and the moment of inertia of

    asked on November 21, 2019
  15. Physics

    A mass of m1 = 6.00 kg is sitting on an inclined plane, which meets the horizantal at an angle of 22.0, which has a coefficient of sliding friction of 0.290, which is 3.50 m = L. a string is attached to m1, it is strung over a pulley, and attached to mass

    asked on September 30, 2012
  16. physics

    Salmon often jump waterfalls to reach their breeding grounds. Starting downstream, 2.56 m away from a waterfall 0.332 m in height, at what minimum speed must a salmon jumping at an angle of 31.2 ◦ leave the water to continue upstream? The acceleration

    asked on October 25, 2019
  17. Math

    58.6 rounded to the nearest whole number

    asked on August 31, 2019
  18. chemistry

    Use the following steps to balance the redox reaction below: Mg + Au+ Mg2+ + Au -Write the oxidation and reduction half-reactions. Make sure each half-reaction is balanced for number of atoms and charge. -Multiply each half-reaction by the correct number,

    asked on February 8, 2012
  19. chemistry

    Explain in one or two sentences how new evidence affects scientific models

    asked on February 8, 2012
  20. Physics

    Baseball player A bunts the ball by hitting it in such a way that it acquires an initial velocity of 2.0 m/s parallel to the ground. Upon contact with the bat the ball is 1.0 m above the ground. Player B wishes to duplicate this bunt, in so far as he also

    asked on October 16, 2015
  21. Geometry

    Part 1. The area of a circular pool is approximately 7,850 square feet. The owner wants to replace the tiling at the edge of the pool. The edging is 6 inches wide, so he plans to use 6-inch square tiles to form a continuous inner edge. How many tiles will

    asked on April 10, 2011
  22. word problems

    Dan enjoys watching the zookeepers feed the animals. The feeding schedule for some of the zoo animals is given below. Design a schedule for Dan so that he can see many animals being fed as possible REMEMBER *He wants to see each animal being fed for the

    asked on October 6, 2006
  23. English

    The Lottery takes place on a beautiful summer day in a small town. Although the location of the town, is never given, it appears to be in a rural community. The story begin as a regural summer day, but has a surising ending. In the short story "The

    asked on October 17, 2011
  24. math

    classify each statement as sometimes, always, or never true. give examples or properties to support your answer a+ (bc) =( a+b) .(a+c)

    asked on August 17, 2011
  25. Physics

    a driver runs off the end of a 6.50 m tall diving board with an initial horizontal velocity of 7.05 m/s. How long is the diver in the air? How far away from the cliff does the diver land? What is the final vertical velocity just before the diver lands?

    asked on November 7, 2017
  26. english

    Identify the appositive or complete appositive phrase. Sam, our cat, is too lazy to catch mice.

    asked on September 26, 2012
  27. chemistry

    1. Which of these chemical formulasCl2, KCl, Ar, or NO2represents both an element and a molecule? 2. A miner finds a small mineral fragment with a volume of 5.74 cm3 and a mass of 14.4 g. What is the density of that mineral fragment?

    asked on March 7, 2012
  28. biology

    if offspring exhibit a 3:1 phenotype ratio, what are the genotypes of the parents?

    asked on November 2, 2011
  29. Math

    Find the perimeter of the triangle with vertices at A (0, 0), B (-4, -3) and C (-5, 0). If it is not possible, write “not possible” and explain why it is not possible.

    asked on June 23, 2011
  30. Physics: Static Equilibrium

    Consider the 667 N weight held by two cables shown below. The left-hand cable had tension 890 N and makes an angle of è with the wall. The right-hand cable had tension 960 N and makes an angle of è1 with the ceiling. a) What is the angle è1 which the

    asked on November 16, 2015
  31. Trigonometry

    wheels on a skateboard are 3.63 inches. If the skateboarder is travelling down a hill at 23 miles per hour what is the angular velocity.

    asked on April 14, 2013
  32. math

    write an expression to represent each total and then simplify it cost of 2 pens and 3 notebooks the note books costs 179 each nd the pens 289 each

    asked on August 18, 2011
  33. Physics

    A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 640 m/s. The gun is pointed directly at the center of the bull's-eye, but the bullet strikes the target 0.028 m below the center. What is the horizontal distance between the end

    asked on October 16, 2015
  34. american history

    what was the teller amendment and what did it do? HELP

    asked on September 15, 2007
  35. Physics

    A tennis ball is struck and departs from the racket horizontally with a speed of 28.6 m/s. The ball hits the court at a horizontal distance of 18.4 m from the racket. How far above the court is the tennis ball when it leaves the racket?

    asked on October 16, 2015
  36. math

    Evaluate for each expression m = 2/5 and n = 1/2 1) 2m + n 2) 2m - n Please explain so I can understand the rest of the questions.

    asked on May 25, 2014
  37. Chemistry

    A stock solution is prepared by adding 20mL of 0.2M MgF2 to enough water to make 80mL. What is the F– concentration of 20 mL of the stock solution?

    asked on November 3, 2011
  38. Physics: Static Equilibrium

    Consider the 667 N weight held by two cables shown below. The left-hand cable had tension 890 N and makes an angle of θ with the wall. The right-hand cable had tension 960 N and makes an angle of θ1 with the ceiling. a) What is the angle θ1 which the

    asked on November 15, 2015
  39. Chemistry

    A solution is 25% by mass calcium nitrate and has a density of 1.21 g/mL what is the molarity?

    asked on May 12, 2016
  40. Math

    A rectangular prism has a length of 100 cm, a height of 10 cm and a width of 5 cm. What is the volume of the rectangular prism? A. 3100 square centimeters B. 1550 square centimeters C. 5000 square centimeters D. 1200 square centimeters 2. A cylinder has a

    asked on March 7, 2012
  41. English

    Please help me errors in my paper so I can correct them. The Lottery takes place on a beautiful summer day in a small town. Although the location of the town, is never given, it appears to be in a rural community. The story begin as a regural summer day,

    asked on October 17, 2011
  42. physics 12

    An 884 kg satellite in orbit around a planet has a gravitational potential energy of -5.44*10^10 J. The orbital radius of the satellite is 8.52*10^6 m and its speed is 7.84*10^3 m/s. A) What is the mass of the planet? B) What is the kinetic energy of the

    asked on October 8, 2011
  43. math 116

    How do you know if a value is a solution for an inequality? How is this different from determining if a value is a solution to an equation? If you replace the equal sign of an equation and put an inequality sign in its place, is there ever a time when the

    asked on March 24, 2010
  44. chemistry

    Suppose a gas sample has a density of 3.68 g/L at STP. What is its density at 25 oC and 19.0 atm?

    asked on December 9, 2014
  45. physical pharmacy

    Hoy does KH2PO4 induce controlled flocculation..?

    asked on September 5, 2013
  46. math 116

    How do you know if a value is a solution for an inequality? How is this different from determining if a value is a solution to an equation? If you replace the equal sign of an equation and put an inequality sign in its place, is there ever a time when the

    asked on March 24, 2010
  47. Science

    How do you determine protons, neutrons, electrons?

    asked on March 11, 2008
  48. Trigonometry

    Find the length of the shadow of a 50 ft vertical pole when the angle of elevation of the sun is 28 degrees

    asked on February 13, 2016
  49. physical mod

    What mass (in grams) of steam at 100°C must be mixed with 462 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 40.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and

    asked on September 13, 2013
  50. math

    Factor completely x³-8x²+11x+20

    asked on November 4, 2009
  51. world history

    can someone who is knowledgeable in world history please check my answers thank you. 1.)hitler became the leader of germany when a.his army staged a coup d' etat against the government b.the german people elected him president c his party won a majority in

    asked on December 4, 2019
  52. Pre-Calculus

    Factor the polynomial completely, and find all its zeros. State the multiplicity of each zero P(x)= x^3-x^2+x

    asked on September 14, 2014
  53. AP Chem!

    Hey, I have a test tomorrow in ap chemistry on gases. My teacher said that the test would be many open ended questions that are sort of like "explain what happens when a balloon is lowered into 77degrees C of liquid nitrogen and why" Can you guys give me

    asked on October 5, 2008
  54. Algebra

    You have recently found a location for your bakery and have begun implementing the first phases of your business plan. Your budget consists of an $80,000 loan from your family and a $38,250 small business loan. These loans must be repaid in full within 10

    asked on March 18, 2008
  55. chemistry

    How do you find the total number of σ and π bonds in a molecule? Is there an equation?

    asked on November 18, 2014
  56. English

    Please check for any errors in my paper. And crrect the errors for me. Let me know if there is anything I need to change. The Lottery takes place on a beautiful summer day in a small day in a small town.However, the the location of the town, is never

    asked on October 15, 2011
  57. chemistry

    what is the difference between to convert and conversion ex. convert 623.5 F to K ex. conversion 203.77miles/sec to cm/nsec

    asked on February 24, 2009
  58. Physics

    Consider the 667 N weight held by two cables shown below. The left-hand cable had tension 890 N and makes an angle of θ with the wall. The right-hand cable had tension 960 N and makes an angle of θ1 with the ceiling. a) What is the angle θ1 which the

    asked on November 15, 2015
  59. chemistry

    A mixture of 94.6g of O2 and 82.2g of Ne is placed in a 200.0L container at 250K . What is the partial pressure of O2 in atmospheres?

    asked on December 1, 2014
  60. ag

    which of the following determines who holds the position of speaker of the house? a the president b the house c the senate d the joint houses of congress

    asked on December 19, 2013
  61. Physics

    The height of a rocket is launched from a platform 12 meters above the ground is modeled by the function h(t)=-4.9t^2+25t+12 where h(t) represents the height of the rocket in meters and t represents the number of seconds after launching. How many seconds

    asked on January 24, 2013
  62. science

    what happen to cereal when heated?

    asked on November 12, 2008
  63. thermodynamics (dont know what to do)

    a piston cylinder device initially contains 10lb of acetylene at 70F. the piston is free to move to maintain 1000 psia on the gas. how much WORK is done by the gas as it is headed to 300F. (draw pv diagram)

    asked on January 17, 2018
  64. Physics: Static Equilibrium

    Consider the 667 N weight held by two cables shown below. The left-hand cable had tension 890 N and makes an angle of è with the wall. The right-hand cable had tension 960 N and makes an angle of è1 with the ceiling. a) What is the angle è1 which the

    asked on November 16, 2015
  65. math

    contract the expression,use the property of logarithms to write each expression as a single logarithm with a coefficient of 1

    asked on February 15, 2014
  66. science

    In science wwhy is that when they say what is the meaning of friction?

    asked on September 10, 2012
  67. Chemistry

    What is the representative particle for a salt, nacl2?

    asked on February 3, 2010
  68. Algebra

    A radio commercial for a used car company offers loans at "20 cents per day for every $400 borrowed" to purchase a car. If you borrow $2000 for 200 days, what amount will you repay? (Assume a 360 day year)

    asked on May 9, 2018
  69. Math

    The following table shows the distribution of Army and Navy personnel who like football and Boxing. ARMY(A) NAVY(N) TOTAL Football(F) 30 8 38 Boxing(B) 55 7 62 TOTALS 85 15 100 Use the table to determine the following probabilities: a) P(A | F) b) P(F | A)

    asked on June 26, 2016
  70. Physics: Static Equilibrium

    Consider the 667 N weight held by two cables shown below. The left-hand cable had tension 890 N and makes an angle of è with the wall. The right-hand cable had tension 960 N and makes an angle of è1 with the ceiling. a) What is the angle è1 which the

    asked on November 16, 2015
  71. chemistry

    The pressure of a gas sample in a rigid container is 810.0 mmHg at 22 oC. What is the pressure, in mmHg, at 50 oC? I have a rough idea on how to solve, but which equation do I use?

    asked on December 9, 2014
  72. chemistry

    Suppose a gas sample occupies 14.9 L at STP. What is its volume at 400 K and 0.87 atm? which equation would you use for this?

    asked on December 9, 2014
  73. chem

    Given these two reactions, how do I calculate ΔH for the third one? P4(s) + 6 Cl2(g) -> 4 PCl3(g) ΔH= -1148 kJ P4(s) + 10 Cl2(g) -> 4 PCl5(g) ΔH = -1500 kJ PCl3(g) + Cl2(g) -> PCl5(g) ΔH = ?

    asked on November 18, 2014
  74. Physics

    The height of a rocket is launched from a platform 12 meters above the ground is modeled by the function h(t)=-4.9t^2+25t+12 where h(t) represents the height of the rocket in meters and t represents the number of seconds after launching. How many seconds

    asked on January 24, 2013
  75. Physics

    The height of a rocket is launched from a platform 12 meters above the ground is modeled by the function h(t)=-4.9t^2+25t+12 where h(t) represents the height of the rocket in meters and t represents the number of seconds after launching. How many seconds

    asked on January 24, 2013
  76. Finance

    On July 1, 2011, Jackson Company exercises a $5,000 call option (plus par value) on its outstanding bonds that have a carrying value of $208,000 and par value of $200,000. The company exercises the call option after the semiannual interest is paid on June

    asked on December 3, 2012
  77. Business

    A bond price of $987.50 has a face value of $1000, pays 5% semiannually, and will repay the face value in 15 years. 5% tables Present Values Pv Annuity year 13 .53032 9.39357 year 14 .50507 9.89864 year 15 .48102 10.37966 What is the yield to maturity of

    asked on January 11, 2011
  78. chemistry

    How did dalton discover the atom?

    asked on September 28, 2010
  79. chem

    How do you find the total number of σ and π for CHOCl?

    asked on November 18, 2014
  80. Physics

    The height of a rocket is launched from a platform 12 meters above the ground is modeled by the function h(t)=-4.9t^2+25t+12 where h(t) represents the height of the rocket in meters and t represents the number of seconds after launching. How many seconds

    asked on January 24, 2013
  81. chemistry 32

    Calculate the concentration, in molarity, of a solutiion prepared by adding 9 mL of water to 1mL of 0.1 M of HCl

    asked on March 10, 2011
  82. chemistry

    calculate the frequency of light that has a wavelength of 103 nm

    asked on October 19, 2010
  83. 4th grade

    what is a question with the word there force

    asked on October 13, 2010
  84. Math

    Kevin hit a golf ball 123 yards. How far did he hit the golf ball in feet?

    asked on March 3, 2009
  85. English

    I have two poems that i have to analyze for poetic devices / figurative language such as (Alliteration, Metaphor, Hyperbole, Simile, Etc) I also need the theme of these poems, Not just "Love" but the more specific theme Sonnet 18 Shall I compare thee to a

    asked on July 6, 2008
  86. Physics: Static Equilibrium

    Consider the 667 N weight held by two cables shown below. The left-hand cable had tension 890 N and makes an angle of è with the wall. The right-hand cable had tension 960 N and makes an angle of è1 with the ceiling. a) What is the angle è1 which the

    asked on November 17, 2015
  87. Pre-Calculus

    Prove the identity: cos(x-π/2)=sin x

    asked on November 12, 2014
  88. math

    i told some of my classmates about this site and they said it really help but they also added that you all shall show examples when you are finished and an explanation and then give the person a sum similar to that.

    asked on December 8, 2012
  89. latin

    what latin word is the phrase strong distaste derived rom

    asked on October 24, 2011
  90. accounting

    A bond price of $987.50 has a face value of $1000, pays 5% semiannually, and will repay the face value in 15 years. 5% tables Present Values Pv Annuity year 13 .53032 9.39357 year 14 .50507 9.89864 year 15 .48102 10.37966 What is the yeild to maturity of

    asked on January 10, 2011
  91. college algebra

    (5,1) is a solution to the equation 2x-3y=7. what does this means

    asked on February 18, 2010
  92. Accounting

    For each fiscal year 2003, 2002, and 2001, is the amount of cash provided by operating activities more or less than the cash paid for dividends?

    asked on January 27, 2008
  93. math

    need help with algebra fractions what is the question

    asked on February 12, 2007
  94. Physics: Static Equilibrium

    Consider the 667 N weight held by two cables shown below. The left-hand cable had tension 890 N and makes an angle of è with the wall. The right-hand cable had tension 960 N and makes an angle of è1 with the ceiling. a) What is the angle è1 which the

    asked on November 17, 2015
  95. math

    what is the equation of the line in slope-intercept form or x=c with the given formation. Slope is in the lowest term as an integer or fraction (not decimal, not still divided by 1). What is substituted in as it is solved? Through (2,15), parallel to

    asked on November 9, 2015
  96. math

    how to factorise?

    asked on September 9, 2013
  97. math

    I NEED HELP

    asked on November 5, 2012
  98. Math

    Perform the indicated operations and simplify: i^-31

    asked on April 8, 2012
  99. algebra 1

    four less than half a number is 17.find the number

    asked on March 2, 2011
  100. Chemistry

    0.3 grams NaOH dissolved in 2.5litres. How many moles?

    asked on October 27, 2012

Pages

  1. 1
  2. 2