Most popular questions and responses by smith
  1. chemistry

    When aqueous solutions of potassium hypochlorite and nitric acid are mixed, an aqueous solution of potassium nitrate and hypochlorous acid results. Write the net ionic equation for the reaction. Use H+ for the hydronium ion.

    asked on March 3, 2014
  2. chemistry

    If 2.1 moles of CaCl2 are dissolved in enough water to make a 0.92-liter solution, what is the resulting molarity? 0.44 M CaCl2 0.70 M CaCl2 2.3 M CaCl2 3.0 M CaCl2

    asked on November 7, 2010
  3. Math

    According to the National Center for Health Statistics, the mean height of an American male is 69.3 inches and the mean height of an American female is 63.8 inches. The standard deviation for both genders is 2.7 inches. According to Chebyshev’s Theorem

    asked on November 15, 2017
  4. chemistry

    if it requires 35.0 milliliters of 0.50 molar NaOH to neutralize 25.0 milliliters of HCl, what is the concentration of the HCl solution? Balanced equation: NaOH + HCl yields NaCl + H2O

    asked on November 17, 2010
  5. chemistry

    Which of the following gases effuses the fastest at a given temperature? Ne CH4 Ar H2

    asked on October 31, 2010
  6. math

    Cazz receives a semimonthly paycheck from a jazz club of $4,500.00. He is married and is entitled to 1 withholding allowance. Using the percentage method, calculate the amount of income tax that should be withheld from his paycheck each pay period.

    asked on October 1, 2015
  7. Chemistry 1150

    Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction:

    asked on February 25, 2014
  8. chemistry

    How many liters of fluorine gas, at standard temperature and pressure, will react with 23.5 grams of potassium metal?

    asked on October 31, 2010
  9. Physics

    A 7.30 kg sign hangs from two wires. The first wire is attached to the left end,and pulls 28.0 N directly left. What is the X component of the force of the second wire

    asked on June 11, 2019
  10. chemistry

    What is the volume of 3.5 moles of oxygen gas (O2) at standard temperature and pressure (STP)? 6.4 L 22.4 L 32.0 L 78.4 L

    asked on October 31, 2010
  11. Human Development

    Blake amuses and challenges his teachers with his independent thinking. He’s self-reliant and responds appropriately to corrections and criticism. Blake’s parents probably use the _______ style of child rearing. A. permissive C. authoritative B.

    asked on March 29, 2011
  12. chemistry

    If 35.8 grams of LiCl are dissolved in 184 grams of water, what is the concentration of the solution in percent by mass?

    asked on November 29, 2010
  13. chemistry

    How many grams of methane gas (CH4) are in a 15.8 liter sample at 1.2 atmospheres and 27°C

    asked on October 31, 2010
  14. English 10

    Which sentence correctly punctuates a nonessential appositive phrase? A. Aries, one of thirteen constellations in the Zodiac, contains four stars. B. Aries one of thirteen constellations in the Zodiac contains four stars. C.Aries, one of thirteen

    asked on November 18, 2014
  15. Physics

    A locomotive creates a 59400 force which creates an acceleration of 0.145 m/s. What is the mass of the locomotive

    asked on June 12, 2019
  16. chemistry

    Under certain conditions, neon (Ne) gas diffuses at a rate of 7.0 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 4.9 centimeters per second. What is the approximate molar mass of the unknown gas?

    asked on October 31, 2010
  17. mat

    A family left their house in two cars at the same time. One car traveled at an average of 7 miles per hour faster than the other. When the first car arrived at the destination after 5 & 1/2 hours of driving, both cars had driven 599.5 miles. If the second

    asked on January 24, 2017
  18. Calc

    Oil spilled from a ruptured tanker spreads in a circle whose area increases at a constant rate of 6.5 {\rm mi}^2{\rm /hr}. How rapidly is radius of the spill increasing when the area is 10 {\rm mi}^2? The radius is increasing at

    asked on November 3, 2015
  19. math

    ht tp://ww tube.c om/watch?v=xjV HHE22r3I

    asked on March 14, 2012
  20. chemistry

    If 2.1 moles of CaCl2 are dissolved in enough water to make a 0.92-liter solution, what is the resulting molarity?

    asked on November 28, 2010
  21. chemistry

    The presence of a catalyst provides a reaction pathway in which the activation energy of a certain reaction is reduced from 188 kJ/mol to 86 kJ/mol which increases the rate of the reaction. How many times faster is the reaction with the catalyst at 307 K,

    asked on June 12, 2012
  22. chemistry

    Under certain conditions, neon (Ne) gas diffuses at a rate of 7.0 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 4.9 centimeters per second. What is the approximate molar mass of the unknown gas? 6.5 g/mol 11 g/mol

    asked on October 31, 2010
  23. us history

    cryptogram grid

    asked on December 2, 2009
  24. Algebra

    What number is not part of the domain of the function g(x)=x+2/x-1 How can you tell? I am stuck.

    asked on October 25, 2016
  25. chemistry

    What would be the resulting molarity of a solution made by dissolving 21.9 grams of KCl in enough water to make an 869-milliliter solution?

    asked on November 29, 2010
  26. chemistry

    A 0.5917 g sample of a pure soluble chloride compound is dissolved in water, and all of the chloride ion is precipitated as AgCl by the addition of an excess of silver nitrate. The mass of the resulting AgCl is found to be 1.5683 g. What is the mass

    asked on March 3, 2014
  27. chemistry

    . Which of the following will result in a chemical change? A. Melting ice to obtain water B. Evaporating alcohol into vapor C. Drying wood in a shed D. Burning coal in a furnace 2. A salt is obtained as a reaction between A. a nonmetal and a metal. B. a

    asked on July 2, 2013
  28. AP Calculus

    True or False If f'(c)=0=f''(c)is less than 0, the f(c) is a local maximum. Justify your answer.

    asked on December 15, 2010
  29. hypothesis statistic

    how a t Test can be employed in hypothesis testing by the use of directional vs. nondirectional hypotheses. Discuss types of research where using the t statistic may be an appropriate alternative to using a z-score. Respond to at least two of your fellow

    asked on December 15, 2010
  30. chemistry

    Why is the ionic compound NaCl (table salt) able to dissolve in a glass of the molecular compound water (H2O)?

    asked on November 29, 2010
  31. chemistry

    Water is a polar solvent. Which of the following will not dissolve in water? sugar table salt vinegar olive oil

    asked on November 7, 2010
  32. College Chemistry

    A 38 L gas tank at 35 Celsius has nitrogen at a pressure of 4.65 atm. The contents of the tank are transferred without loss to an evacuated 55.0L tank in a cold room where the temperature is 4 Celsius. What is the pressure of the tank??

    asked on March 2, 2010
  33. math

    Please help solve this question. Thx in advance. Nick, Ryan, Simon, and James from the band Dandelion sang a few songs at their first concert. Always three of them were singing, and one was playing the guitar in accompaniment. James sang the most songs of

    asked on January 5, 2018
  34. art urgent

    achile de gas in the uniform of a cadet by edgar degas how was proportion used in this image to create a mood of tranquility to create an optical illusion to create a sense of perspective in the image to make sure the person was drawn correctly

    asked on November 5, 2015
  35. algebra II

    If a pro basketball player has a vertical leap of about 25 inches, what would his hang time be? Use V=48T^2 Answer:_______seconds.

    asked on October 23, 2010
  36. Health

    What short-term and long-term health conditions are direct consequences of the obesity epidemic? What individual and societal changes can help reverse the obesity epidemic?

    asked on April 28, 2009
  37. Math

    The sales price of a car is 12,590, which is 20% off the original price. What is the Original price?

    asked on March 11, 2008
  38. Math

    If sally can paint a house in 4hrs, and John can paint the same house in 6hrs, How long will it take for both of them to paint the house together?

    asked on March 11, 2008
  39. Math

    Jim is able to sell a hand-carved statue for $670 which was a 35% profit over his cost. How much did the statue originally cost him? How do you find the answer to this?

    asked on March 11, 2008
  40. finance

    suppose the Wrights found that both Tom and Sue had a life insurance protection gap of $50,000. Present the steps in sequence how Wrights should proceed to search for protection to close that gap?

    asked on June 25, 2008
  41. math

    What is the theoretical probability of getting tails if you flip a coin 40 times? a)If you did this experimental would you result be the same? Why? b) Is is possible to flip a coin 40 times and get tails each time? Explain.

    asked on June 21, 2017
  42. Differential Equations

    Consider the system shown below of two masses of mass m, coupled together between two fixed walls via springs with varying spring constants. Let x(t) and y(t) be the horizontal displacements of the two masses as a function of time. (a)Write down a system

    asked on October 13, 2014
  43. algebra

    If a pro basketball player has a vertical leap of about 20in., what is his hang time? Use the hang time function v=49t^2

    asked on November 9, 2011
  44. algebra

    Rationalize the denominator, assume that all expressions under radicals represent postive numbers. sqrt:a - sqrt:b/sqrt:a + sqrt:b

    asked on November 8, 2011
  45. math

    How much money must I start out with if I want to end up with 20,000 over 5 years with and intrest rate of 5% a year.

    asked on February 14, 2011
  46. chi-square test

    the assumptions for using a chi-square test. Research articles provide practical examples from the research to support your assumptions. Include a citation of one article you used for your research

    asked on December 15, 2010
  47. analysis of variance

    which analysis of variance should be applied when an experiment has more than one independent variable. Discuss the assumptions and limitations of the analysis of variance in comparison with the t test including a discussion of post hoc tests

    asked on December 15, 2010
  48. psy325

    For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

    asked on December 15, 2010
  49. math

    A rectangular window is 5 ft by 8 ft. Becky wants to replace the glass in the window. How many square feet of glass should she buy?

    asked on June 23, 2010
  50. college trig

    From a point on the ground a person notices that a 110-ft tree on top of a hill subtends an angle of 3°. If the angle of elevation to the bottom of the tree, represented by angle A in the figure below, measures 37°, find the height h of the hill

    asked on March 26, 2010
  51. math

    961 = X squared + Y squared + Z squared Find possible values for X, Y, Z

    asked on July 14, 2018
  52. math

    the length of each edge of a cube is of length 3m. the edges are increased by 20%. Calculate the percentage increase in the volume of the cube.

    asked on April 7, 2017
  53. Maths

    The ball of a float value is a sphere 200mm in diameter. Calculate the volume and surface area of the ball

    asked on November 17, 2015
  54. Physics

    A student applies a force of magnitude 39.0 N at an angle of 22.6o with the horizontal to push a 4.00-kg textbook 1.00 m across a table from rest to a final speed of 1.75 m/s. Find the work done by friction on the textbook.

    asked on July 18, 2012
  55. math

    To advertise their business, Toni and Mandy can either purchase flyers or e-mail addresses. They can print, distribute and pay the postage of 3 million flyers for $450. Find the unit price for the flyers.

    asked on October 7, 2011
  56. statistic

    how a t Test for a dependent variable can be of great value in applying a new approach to the treatment of aggressive behavior to a small group of students. Why would this t Test be preferred to using another test statistic?

    asked on December 15, 2010
  57. 11th grade English

    Write your own journal entry from the perspective of a member of Bradford's colony. What do you think of these unruly pirates? What shocks you the most about these surly characters? How do the manners of the pirates differ from yours?

    asked on May 16, 2010
  58. governmnet

    Describe the basic character of the unitary states. how can one reconcile the concept of the unitary state with the principles of the Declaration of Independence?

    asked on April 2, 2009
  59. math

    one decimeter is equal many centimeters

    asked on March 27, 2008
  60. math or physics

    Find the distance from 0 to 3 of the ∫ l3t-5ldt. I don't understand how the answer is 41/6.

    asked on September 21, 2018
  61. Math


    asked on December 11, 2016
  62. math

    if you got 12 yds of fabric and each skirt require 7/8 how many skirts can be made

    asked on October 7, 2016
  63. Pre calc

    estimate, correct to three decimal places all the zeros of the polynomial p(X) = x^4 - 4x^3 +5x -1

    asked on May 17, 2016
  64. maths

    if the angle of elevation of A from B is 65' what is the angle of depression of BB from A

    asked on May 14, 2016
  65. Physics

    A speedboat increases in speed from 21 m/s to 30.9 m/s in a distance 191 m. a)Find the magnitude of its acceleration. Answer in units of m/s^2. b)Find the time it takes the boat to travel this distance. Answer in units of s.

    asked on February 5, 2014
  66. math

    8x + 5y = -144 4x + y = -36

    asked on November 5, 2013
  67. Introduction to Psychology

    Alexander, a fifth- grade teacher, believes that Kimberly's behavior is a result of poor parenting, The school concerned with her inability to focus, attend to directions, and recall information from the previous day or events from earlier in the day.

    asked on May 30, 2012
  68. Introduction to Psychology

    Behavioral and Psychodynamic perspectives differ in that the former emphasizes the ______ while the latter focuses on _____.

    asked on May 30, 2012
  69. Introduction to Psychology

    Dr. Hall believes that thought processes determine behavior.She encourages her patient to examine the way he looks at problems and solves problems. They look for successful and unsuccessful evaluations and strategies.

    asked on May 30, 2012
  70. Math

    Beaufort Scale and Wind Effects 0 Smoke rises vertically 1 Smoke shows wind direction 2 Wind felt on face 3 Leaves move, flags extend 4 Paper, small branches move 5 Small trees sway, flags beat 6 Large branches sway, flags beat 7 Large branches sway,

    asked on February 22, 2012
  71. algebra

    Write an equation of the line containing the specified point and parallel to the indicated line.(1,4)3x+y=5

    asked on August 2, 2011
  72. psy325

    For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3

    asked on December 15, 2010
  73. Eurpoean History

    How did imperial forces entice resistant countries into submission? What role did the promise of democracy play? In your opinion, was this promise kept? Why or why not?

    asked on October 21, 2010
  74. algebra

    sarah has dimes and nickels which total $1.65. the number of nickels she has is 3 less than the number of dimes. how many of each does she have?

    asked on October 17, 2010
  75. math

    two planes take off from an airport at the same time and head in opposite directions at 260 mph and 275 mph respectively. in how many hours will they be 1605 miles apart?

    asked on October 16, 2010
  76. math

    a coast guard ship left the port at 30 mph. four hours later a helicopter was dispatched at 90 mph to intercept the ship. how long will it take the helicopter to catch the ship?

    asked on October 16, 2010
  77. algebra

    an insecticide originally contained 1/2 oz of pyrethrins. the new formula contains 5/8 oz of pyrethrins. what percent of pyrethrins of the original formula does the new formula contain?

    asked on October 9, 2010
  78. algebra

    Solve by elimination 7r-5s=41 5r+7s=61

    asked on October 5, 2010
  79. math

    Evaluate 80mi/h x 3 h Be sure to use the proper units

    asked on June 26, 2010
  80. geometry

    Let A = {circle, square} and let B = {3, 4, 5}. Find A X B

    asked on June 18, 2010
  81. Government

    What's the U.S model of corporate control? What are its consequences for the American society?

    asked on May 1, 2010
  82. college

    what kind of government does the Gayanashagowa represent?

    asked on April 2, 2009
  83. Calculus

    Find the maximum and minimum values of f(x,y,z)=x+4y+5z on the sphere x^2+y^2+z^2=1.

    asked on November 19, 2008
  84. Personal Finance

    What does it mean by 401k Investment Vehicles?

    asked on June 14, 2012
  1. Math


    posted on May 14, 2018
  2. Math

    Answer stupids!!???

    posted on May 14, 2018
  3. math


    posted on May 14, 2018
  4. lan

    Thanks!!!!!!!! Jr??!!!!!!!!

    posted on May 9, 2018
  5. English pls help

    Answer the question !!!!!!!!!!!!!!!!!!!!!please !!!!!!!!!!

    posted on May 9, 2018
  6. Math

    I don't understand the answer henry???

    posted on May 8, 2018
  7. statistics

    Yes. Although the selections are not​ independent, they can be treated as being independent by applying the​ 5% guideline.

    posted on February 25, 2018
  8. Science


    posted on August 12, 2017
  9. Physics/math

    A gun with a muzzle velocity of 1500 feet per second is fired at an angle of above the horizontal. Find the vertical and horizontal components of the velocity. (Round your answer to one decimal place.)

    posted on November 30, 2016
  10. statistics

    tell me answe

    posted on March 4, 2016
  11. Algebra

    you do it yourself

    posted on January 12, 2016
  12. art urgent

    oh sorry for not putting up my choice i believe it is d because it obviously not a or b and my definition of perspective is the illusion of depth which the picture doesnt have much of

    posted on November 5, 2015
  13. MATHS


    posted on October 18, 2014
  14. Critical Thinking (philosophy)

    questions 1-25

    posted on December 6, 2012
  15. personl finance

    What does it mean by 401k Investment Vehicles?

    posted on June 14, 2012