Marty

Most popular questions and responses by Marty
  1. Chemistry

    I'm trying to find if potassium nitrate is polar or non-polar by using the electronegativity scale. Can someone check my work? Electronegativity: potassium: 0.82 nitrogen: 3.04 oxygen: 3.44 =3.44-3.04 =0.82-0.4 =0.4 =0.42 So the final answer is 0.42 and by

    asked on November 10, 2007
  2. Physics

    an electron in a mercury atom jumps from level a to level g by absorbing a single photon. determine the energy of the photon in joules.

    asked on April 19, 2012
  3. Chemistry

    At what temperatures can 40mL of water dissolve the follownig quantities of potassium nitrate? (a) 35.0g (b) 20.0g can anyone start me off with a formula or a hint?

    asked on November 14, 2007
  4. Chemistry

    How many atoms of H are in a mixture of 3.49 x 10^23 molecules of H2O and 78.1g of CH3OH?

    asked on October 22, 2007
  5. Chemistry

    What would be the mass of a bag of anhydrous magnesium sulfate, MgSO4, if it contained the same amount of magnesium as a 1.00kg bag of Epsom Salts, MgSO4 . 7H2O?

    asked on October 22, 2007
  6. Chemistry

    A hydrate of zinc nitrate has the formula Zn(NO3)2 . xH2O. If the mass of 1 mol of anhydrous zinc nitrate is 63.67% of the mass of 1 mol of the hydrate, what is the value of x?

    asked on October 22, 2007
  7. Physics

    Calculate the work done by planet X on its moon. Planet X applies a force of 5.6 x 10^10 N on its moon and the moon is 4.0 x 10^8 km away from the planet and it continues to circle the planet in a circular orbit of circumference of 2.5 x 10^9 m.

    asked on March 26, 2008
  8. Chemistry re-post URGENT

    Chemical analysis reveals capsaicin to contain 71.0% of carbon, 8.60% hydrogen, 15.8% oxygen and 4.60% nitrogen. a) Determine the empirical formula of capsaicin b) Each molecule contains one atom of nitrogen. What is the molecular formula of capsaicin? I

    asked on October 22, 2007
  9. Chemistry

    A hydrated MgSO4 salt, weighing 3.211g, is heated in a crucible until reaching a constant weight. The weight of the anhydrous MgSO4 is 1.570 grams. 1. Calculate the moles of H20 removed and the moles of anhydrous MgSO4 remaining in the crucible. 2. What is

    asked on October 20, 2007
  10. Chemistry

    How many atoms of C are contained in 45.6g of C6H6?

    asked on October 20, 2007
  11. Physics

    If you weighed 112 N on the Moon where g=1.6N/kg, how much would you weigh on Earth?

    asked on March 5, 2008
  12. Maths

    In order to make some home improvements, a home owner spent $40,000. He paid 20% as a down payment and financed the balance of the purchase with a 36-month fixed installment loan with an APR of 7.5%. Determine the home owner’s a) total finance charge and

    asked on March 6, 2008
  13. Chemistry

    1. Water is a polar molecule. Therefore, it acts as a polar sollvent. a) Think about the following compounds: iodine, cobalt (II) chloride and sucrose (C12H22O11). Which compounds are soluble in water. b) Assume that the interaction between solutes and

    asked on November 6, 2007
  14. Chemistry

    6ClO2 + 3H2O -> 5HClO3 + HCl a) If 71g of ClO2 is mixed with 19g of water, what is the limiting reactant? b) What mass of HClO3 is expected in part (a)? c) How many molecules of HCl are expected in part (a)? I completed part a and b but got stuck on part

    asked on October 29, 2007
  15. Chemistry

    The isotopes of argon have the following relative abundances: Ar-36 0.34% Ar-38 0.06% Ar-40 99.66% Estimate the average atomic mass of argon. How would I go about doing this?

    asked on October 20, 2007
  16. math

    Sue wants to frame a picture with a matte of uniform width all around the print. Sue wants the area of the matte to equal the area of the picture. If the print measures 60cm by 40cm how wide should the matte be? let the width of the uniform matte be x cm

    asked on May 23, 2007
  17. accounting

    John's specialty store uses a perpetual inveentory system. the following are some inventory transaction for the month of may 2009. John's purchased merchandise on account for $5,000. FREIGHT CHARGE OF $300 WERE PAID IN CASH. JOHN'S RETURNED SOME OF THE

    asked on November 28, 2010
  18. Calculus

    An indoor physical fitness room consists of a rectangular region with a semicircle on each end. The perimeter of the room is to be a 200m running track. Find the dimension that will make the area of the rectangular as large as possible.

    asked on March 7, 2009
  19. Physics

    The first and second resonant lengths of an air column that is closed at one end are 15.5 cm and 45.5 cm, respectively. What is the best value for the wavelength?

    asked on April 26, 2008
  20. Physics

    At a height of 3.00 m above the ground, a 0.500-kg ball is thrown with an initial speed of 30.0 m/s in an arc from point A to point C. When the ball is 6.00 m above the ground travelling upward, what is the speed of the ball?

    asked on March 26, 2008
  21. Physics

    A 2500kg car is travelling due west at 30m/s when the brakes are applied, exerting a force of 5000 N [E]. What is the car's acceleration due to the braking?

    asked on March 2, 2008
  22. Chemistry

    Chemical analysis reveals capsaicin to contain 71.0% of carbon, 8.60% hydrogen, 15.8% oxygen and 4.60% nitrogen. a) Determine the empirical formula of capsaicin b) Each molecule contains one atom of nitrogen. What is the molecular formula of capsaicin? I

    asked on October 22, 2007
  23. physics

    How much would a 60-kg person weight on the Moon where the gravitational field has a magnitude of 1.6 N/kg?

    asked on March 5, 2008
  24. Physics

    A block M1 of mass 20.0 kg sits on top of a larger block M2 of mass 30.0 kg which sits on a flat surface. The kinetic friction coefficient between the upper and lower block is 0.415. The kinetic friction coefficient between the lower block and the flat

    asked on October 2, 2015
  25. physics

    A rocket ship at rest in space gives a short blast of its engine, firing 26 kg of exhaust gas out the back end with an average velocity of 182 m/s. What is the change in momentum of the rocket during this blast?

    asked on April 2, 2013
  26. Chemistry

    Express each quantity as a mass in grams. a) 3.70mol of H2O b) 8.43 x 10^23 molecules of PbO2

    asked on October 20, 2007
  27. Physics

    An airplane has a takeoff speed of 66m/s. Assuming a constant acceleration of 1.62m/s^2, how long is the plane accelerating down the runway?

    asked on August 28, 2015
  28. Chemistry

    Convert each quantity to an amount in moles: a) 4.27 x 10^21 atoms of He b) 7.39 x 10^23 molecules of ICl

    asked on October 20, 2007
  29. Math

    How do you factor 6a^2 + 17ab + 12b^2

    asked on September 4, 2007
  30. Math word problem

    The cost of producing x bags of pretzels is modelled by C(x)=0.5x^2 + x + 2 where x=# of bags per hundred. State the function that represents the average cost.

    asked on November 9, 2008
  31. Physics need help now

    A daredevil is dead set on jumping the Grand Canyon at its narrowest point (180 meters across). He has set up a ramp at 25 degrees and the ramp's release point is 20 meters above the rim of the canyon. He claims that his bike will be going 40m/s by the

    asked on September 22, 2013
  32. Math (Functions)

    he cost of producing x bags of pretzels is modelled by C(x)=0.5x^2 + x + 2 where x=# of bags per hundred. State the function that represents the average cost. Do you just have to factor it?

    asked on November 9, 2008
  33. Math

    PLEASE HELP FACTOR: 1. 8x^4 - 14x^2y^2 + 3y^4 2. 10m^2 - 17mn - 6n^2

    asked on September 4, 2007
  34. math

    Jeff is replacing the tile on his floor. he pans to use square tiles that are 11 inches on a side. the floor is 8 feet long and 6 feet wide. cabinet in the middle of the floor that will not need tile. this space is 2 feet wide and 3 feet long. estimate how

    asked on April 14, 2015
  35. statistics

    The mean score for all individuals who took the Law School Admission Test (LSAT) in 2010 was 155 and the standard deviation was 7. 9. What is the z score for a person, who received an LSAT score of 167? a. +1.71 b. +1.64 c. +1.74 d. -1.71 10.What is the

    asked on April 18, 2014
  36. physics

    A daredevil is dead set on jumping the Grand Canyon at its narrowest point (180 meters across). He has set up a ramp at 25 degrees and the ramp's release point is 20 meters above the rim of the canyon. He claims that his bike will be going 40m/s by the

    asked on September 22, 2013
  37. Nuclear Physics

    If a polonium-210 (Po-210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po-210 nucleus? Hint: W = F*r F=kq1q2/r 2

    asked on January 13, 2011
  38. health help please!!

    socialization process of caregivers. what are the implications for patients?

    asked on August 4, 2008
  39. math

    2/6 of the insects were centipedes. 1/2 were millipedes, 12 were flies. How many insects were there? Please explain.

    asked on March 11, 2008
  40. calculus

    If you are blowing up a balloon at a rate of 3 cubic ft per min, what is the rate of change of the radius after 30 seconds

    asked on December 16, 2016
  41. Math

    Mandy got 22 questions correct on her test. Her grade was 80%. How many questions were on the test.

    asked on October 20, 2014
  42. LOGS (ALGEBRA)

    FIND THE INVERSE: f(x) = 10^(5x+3) - 10 f^-1(x) =

    asked on May 5, 2014
  43. Acct

    One of the companies for which you provide accounting services offers office cleaning services and has 8 customers. Cleaning services are provided in the evenings, Sunday through Thursday, at a rate of $30 per day. Billing is done every Friday. During the

    asked on February 20, 2014
  44. chemistry

    100 mL of water is already in the calorimeter. Use the density of water at 25°C (0.998 g/mL) to determine the mass

    asked on June 27, 2011
  45. Tech math

    The sum of two numbers is 32. Ten more than half of the sum of the numbers is 26. What are the numbers?

    asked on May 26, 2011
  46. physics

    If a polonium-210 (Po-210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po-210 nucleus? Hint: W = F*r F=kq1q2/r 2

    asked on January 14, 2011
  47. Cultural Diversity

    if some one made the following statement Asian americans and pacific islander belong to a single -asian American culture, how would you explain that the statement is a misconception? include whether you think ,most americans believe this misconceptions and

    asked on April 12, 2010
  48. Physics

    If the third harmonic of a standing wave in a vibrating string is 600 Hz, what is the fundamental frequency?

    asked on April 26, 2008
  49. Physics

    The applied force of a 2.0-kg object is 8.4 N [E] and the friction is 2.2 N [W]. What is the motion of the object? Can I use the formula Fnet = ma?

    asked on March 2, 2008
  50. economics

    What changes if any to the current condition of these tools would you make at the next meeting of the Federal Reserve Explain why and the benefitsdrawbacks of this strategy

    asked on December 4, 2007
  51. Math

    Betty is supposed to work the same number of hours each week. One week, she worked 42 hours the first week and 34 hours the second week, how many hours is Betty supposed to work?

    asked on December 13, 2015
  52. Physics

    A model rocket is launched straight upward with an initial speed of 46.4 m/s. It accelerates with a constant upward acceleration of 2.18 m/s2 until its engines stop at an altitude of 138 m. What is the maximum height reached by the rocket? How long after

    asked on September 4, 2015
  53. statistics

    A residential treatment facility tests a new group therapy for patients with self destructive behaviors. To decrease scores of behaviors that has a mean in the overall population of 35 and a standard deviation of 4.7. The mean score for patients after new

    asked on March 1, 2013
  54. medical coding and billing

    discuss coding or obstetrics, including items covered by the global fee for antepartum and pospartum periods of normal pregnancy

    asked on September 22, 2010
  55. algorithms and logic

    i need an example of a peer review of the currency conversion test procedure exercises

    asked on June 10, 2010
  56. algebra

    7r-3s=18 3r+7s=16 Solve by the elimination method, please.

    asked on April 11, 2010
  57. algebra

    Perform and give answer in simplified form Find the product (2x-5)^2

    asked on December 13, 2009
  58. Algebra

    Factor completely 6a-9a^2

    asked on December 13, 2009
  59. math

    why is it necessary to find the gcf of two or more numbers

    asked on April 11, 2009
  60. Calculus

    Find the volume of the cone of maximum value that can be inscribed in a sphere of radius 10cm.

    asked on March 9, 2009
  61. Physics

    A student photographs a 18cm flower so it fills half of a 24mm slide. What is the magnification?

    asked on May 20, 2008
  62. Significant Digits

    (2.7 x 10^2) x (4.23 x 10^2) PLEASE YOU SIGNIFICANT DIGITS!!! thx

    asked on September 28, 2007
  63. Math

    A walking area around a pool is going to be frfinished with a nonslip surface. If it costs $17 per square foot to install what is the total cost? Inner rectangle is length 20 ft by width 10 ft. Outer dimensions of walkway are 14 length by 10ft. I have no

    asked on October 7, 2016
  64. math

    (1,0) (3,4) (5,8) (7,12) what would be the output value when the input value is 12?

    asked on September 22, 2014
  65. math

    factor 8x^3-8x=0

    asked on January 26, 2014
  66. WAN

    Provide a hypothetical situation for each signal type that illustrates how it could be, or is being, used in a WAN. In what circumstance, for example, would a company choose to use a satellite signal

    asked on January 31, 2013
  67. us history

    How did the automobile change America both geographically and socially?

    asked on August 24, 2012
  68. SCIENCE

    A PIPE FULL DIESEL HAS 5 PSI ON IT, AT 70 DEGREES AND ONE DEGREE OF CHANGE = WHAT PRESSURE

    asked on August 24, 2012
  69. american history

    I need to present arguments for and against imperialism in the 19th century and state if it was UN-American or not.

    asked on August 13, 2012
  70. american history

    What did the Compromise of 1877 have to do with the end of Reconstruction?

    asked on August 3, 2012
  71. Health

    Write a 200- to 300-word response to the following: What is long-term care? Provide an example. What is continuum of care services in the United States? Why is long-term care one of the greatest challenges facing the health care delivery system today?

    asked on July 19, 2012
  72. chemistry

    100 mL of water is already in the calorimeter. Use the density of water at 25°C (0.998 g/mL) to determine the mass

    asked on June 27, 2011
  73. mat116

    G(z)=4z+2 how to work this

    asked on July 25, 2010
  74. computers

    hl=en&lr=&as_qdr=all&ei=pAQqTJXuBsP38AaSnPTRCA&q=how+does+an+information+system+work+what+are+its+people+organizational+and+technological+components+List+and+describe+the+people+organizational+and+technological+components&start=10

    asked on June 29, 2010
  75. Cultural Diversity

    if someone made the following statement asian americans and Pacific Islanders are a model minority, how would you explain that the statements are misconceptions and why or why not. include whether you think most americans believe these mixconceptions, and

    asked on April 12, 2010
  76. cultural diversity

    2-3 consequence situations that are associated with group known as native americans.

    asked on February 26, 2010
  77. algebra

    solve the equation for x 1 + 1 = 1 - - - x 12 8

    asked on December 13, 2009
  78. havelock high

    An object accelerates (changes its speed) only if the forces acting on it in one direction are greater than the forces in the opposite direction, All of the following objects will accelerate EXCEPT? A) a ball striking a wall, in which the force of the ball

    asked on March 29, 2009
  79. 5th grade math

    A radius and a diameter both have to ___________.

    asked on March 17, 2009
  80. 8th grade

    Need weight of Iron vs magnesiium

    asked on January 12, 2009
  81. Psychology

    Describe other measurements sociologists use to calculate prejudice.

    asked on August 27, 2008
  82. Physics

    Two identical charges are 36 mm apart. The electrostatic force between them is 1.3 N. What is the size of each charge?

    asked on June 3, 2008
  83. Chemistry

    What are some factors that affect the solubility of ionic substances?

    asked on November 24, 2007
  84. math

    is 3n^2 - 11n + 6 factorable?!

    asked on September 4, 2007
  85. Math

    x^4 + x^2 - 20 Help! I have no clue how to factor this! Do i have to square root everything?

    asked on September 4, 2007
  1. History

    i go to privavera too

    posted on July 17, 2019
  2. Social Studies

    answers b,d 100% connexus

    posted on February 8, 2017
  3. calculus

    aren't you supposed to plug everything in AFTER you derive it?

    posted on December 16, 2016
  4. math

    x=7.5 y=18.5

    posted on November 21, 2016
  5. 12th grade A.P. Economics

    Functioning labor unions

    posted on June 9, 2016
  6. math

    2 ounces

    posted on January 27, 2016
  7. equations

    3 dimes+1 nickle+2pennies=1quarter+1dime+?

    posted on November 13, 2012
  8. american history

    I believe if I had an example of the arguments for and against I would be able to go from there.

    posted on August 13, 2012
  9. physics

    I don't quite understand

    posted on January 14, 2011
  10. Calculus questions..really need help, please!

    woops i mean this........ the answer to this question is..... OMG KID THAT IS HARD, WHAT GRADE R U IN

    posted on November 4, 2008
  11. Calculus questions..really need help, please!

    the answer to this question is OMG THAT ISHARD JESE KID WAT GARDE R U IN

    posted on November 4, 2008
  12. math mesurment

    i do not ahve a clue but then again im only in 7th grade

    posted on November 4, 2008
  13. math mesurment

    i woudn't know the answer to this ? but i would think there is

    posted on November 4, 2008
  14. math mesurment

    is there a ruler thhat is just made for fractions like 1/8ths and lower

    posted on November 4, 2008
  15. Com 220

    Actually it is called the SQ3R method, my bad.

    posted on August 27, 2008