Popular questions and responses by kat
  1. Science - Please Look!

    The senses are used to make which of the following? inferences predictions evaluations ((**observations**)) You walk into the kitchen and see a broken egg on the floor. Which of the following is an inference you can make based on this observation? ((**The

    asked on August 22, 2016
  2. Chemistry

    Which of the following reactions are spontaneous (favorable)? A] 2Mg(s) + O2(g) -> 2MgO(s) Delta G = -1137 kJ/mol .. B] NH3(g) + HCl(g) -> NH4Cl(s) Delta G = -91.1 kJ/mol ... C] AgCl(s) -> Ag+(aq) + Cl-(aq) Delta G = 55.6 kJ/mol .. D] 2H2(g) + O2(g) ->

    asked on March 8, 2012
  3. Math

    The coordinates A(0, 0), B(0, 3), C(4, 3) and D(4, 0) are graphed and connected together. What 3-dimensional shape will be created when this shape is rotated about the y-axis? Provide an explanation and proof for your answer to receive full credit. My

    asked on June 9, 2017
  4. Business/Finance

    A $120,000, 5% 200-day note dated June 6 is discounted on October 8. The discount period is _______ days. a. 142 b. 67 c. 124 d. 76 C is wrong

    asked on August 31, 2014
  5. Business Math

    Lee and Fred are elementary school teachers. Fred works for a charter school in Pacific Palisades, California, where class size reduction is a goal for 2013. Lee works for a noncharter school where funds do not allow for class size reduction policies.

    asked on December 13, 2018
  6. alebra

    Let f(x)=2x^2+x-3 and g(x)=x-1. Perform the indicated operation then find the domain. (f*g)(x) a.2x^3-x^2-4x+3; domain:all real numbers b.2x^3+x^2-3x; domain: all real numbers c.2x^3+x^2+4x-3; domain: negative real numbers d.2x^3+x-3x+3; domain: positive

    asked on February 18, 2018
  7. Chemistry

    You wish to know the enthalpy change for the formation of liquid PCl3 from the elements shown below. P4(s) + 6 Cl2(g)--> 4 PCl3(l) ΔH°f = ? The enthalpy change for the formation of PCl5 from the elements can be determined experimentally, as can the

    asked on May 1, 2011
  8. chemistry

    Arrange the following 0.1 M solutions in order of increasing pH and state why you placed each solution in that position: NaCH3COO HCl HCN NaOH NH3 NaCN KNO3 H2SO4 NH4CL H2SO3 NaHCO3 Na3PO4 CH3COOH

    asked on March 27, 2011
  9. intro to computers

    You create a formula in A8 that adds up the numbers listed in A1 through A7. You copy the formula and paste it into C8. What happens in C8? A. The sum of cells A1 through A8 appears. B. The sum of cells C1 through C8 appears. C. The sum of cells A1 through

    asked on February 20, 2016
  10. please check my english

    1. Which phrase, in "The Prisoner Who Wore Glasses," best describes Brille? (1 point) easygoing and generous with his friends intelligent, yet shortsighted in his political views intuitive and calculating in his appraisal of others quick­thinking and

    asked on December 4, 2014
  11. Math

    A squirrel jumps into the air with a velocity of 7 m/s at an angle of 20°. What is the maximum height reached by the squirrel? I have my answer as 29.2 Am I right?

    asked on October 17, 2018
  12. math

    At the amusement park, you decide to ride the Ferris wheel, which has a maximum height of 80 meters and a diameter of 40 meters. It takes the wheel seven minutes to make one revolution. Write the sinusoidal function, f(t), that models the height of your

    asked on November 21, 2014
  13. math

    e. Felix Baumgartner is a daredevil famous for breaking the sound barrier during a freefall on October 14, 2012. Aided by a weather balloon, he climbed to a height of 128,100 feet. More than 24 miles in the air, he was so high up that he could see

    asked on June 17, 2014
  14. Chemistry

    OF2(g) + H2O(g) -> O2(g) +2HF(g) ΔH°rxn = -318 kJ Using bond energies, calculate the bond dissociation energy of the O-F bond, in OF2. This is the question and I got 438 as the answer, which is wrong. I don't know what I did wrong??

    asked on May 1, 2011
  15. biology

    Is sugar polar or nonpolar and why? I think it's nonpolar, but I don't really know why... Please help. Thank you.

    asked on September 1, 2009
  16. Chemistry

    The electron in a hydrogen atom, originally in level n = 8, undergoes a transition to a lower level by emitting a photon of wavelength 3745 nm. What is the final level of the electron? a) 5, b)8, c)9, d)6

    asked on April 23, 2019
  17. physics

    A car (m = 1870 kg) is parked on a road that rises 12.1 ° above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires?

    asked on August 12, 2015
  18. physics

    A girl delivering newspapers travels 3 blocks west, 4 blocks north, then 6 blocks east. What is her resultant displacement? what is the total distance that she travelled? and how do I graph this??

    asked on January 9, 2013
  19. Algebra 2

    James sold magazine subscriptions with three prices: $26, $19, $ 23. He sold 3 fewer of the $26 subscriptions than of the $19 subscriptions and sold a total of 32 subscriptions. If his total of sales amounted to $716, how many $23 subscriptions did James

    asked on October 27, 2011
  20. Math

    Your local gas station is having a price war. During the past 7 days, they have lowered the price of regular gas by $.02 each day. Define a variable. Then write and solve an equation to find the total change in gas price. Show your work. I need help

    asked on April 10, 2020
  21. Chemistry

    An aqueous solution is composed of 7.50 g NaCl (MM = 58.44 g/mol) diluted to 0.100 L. Calculate the osmotic pressure of the solution at 298 K a. 5.83 atm b. 9.22 atm c. 18.3 atm d. 62.8 atm

    asked on February 6, 2016
  22. algebra

    I don't quiet know where to start can anyone help guide me? Bonnie has a container in the shape of rectangular pyramid. The formula for the surface area of the enclosed space is S=lw+0.5Ph. Solve for P? P= S - lw- 0.5h P= S + lw + 0.5h P= S-lw/ 0.5h P=

    asked on October 5, 2015
  23. algebra

    Samir begins riding his bike at a rate of 6 mph. Twelve minutes later, Chris leaves from the same point and bikes along the same route at 9 mph. At any given time, t, the distance traveled can be calculated using the formula d = rt, where d represents

    asked on October 17, 2014
  24. Chemistry

    Zinc carbonate, ZnCO3(s), dissolves in water to give a solution that is 1.7 multiplied by 10-5 M at 22°C. Calculate Ksp for ZnCO3(s) at this temperature.

    asked on May 24, 2011
  25. college physics

    a 7500 kilogram rocket blasts off vertically upward from the launch pad with a constant acceleration of 2.25 m/s squared and feels no appreciable air resistance, when it reaches the height of 525 meter its engine suddenly fail so that the only force acting

    asked on July 19, 2010
  26. Chemistry

    a change in pressure would have the greatest effect on the solubility of a A. solid in a liquid B. gas in a liquid C.liquid in a liquid D.liquid in a solid in an aqueous solution of potassium chloride, the solute is A. Cl B. KCl C. H20 D. K B for the

    asked on March 26, 2007
  27. Chemistry

    The diagram shows an electrochemical cell with a gold strip (left) and aluminum glasses (right). In your response, do the following: • Label the cathode and the anode, including the charge on each. • Show the flow of electrons. • Describe what type

    asked on May 13, 2016
  28. Calculating and Reporting Healthcare Statistics

    How do you: Calculate the total inches of documents filed per day for all clerks. Calculate the total documents filed per day for all clerks. Calculate the weekly total inches of documents filed per clerk (round to two decimal points). Calculate the weekly

    asked on April 23, 2015
  29. Driver's Ed

    Driver's licenses can not be suspended for more than 365 days. A) True. B) False. In 2002, two out of every three drivers under the age of 21, involved in a single vehicle crash, were killed at night. A) True. B) False.

    asked on July 22, 2013
  30. physics

    an object weighs 10N on earth .what is the objects weight on a planet one tenth the earths mass and one half its radius?

    asked on July 12, 2013
  31. Chemistry

    Kp for the following reaction is 0.16 at 25°C. 2 NOBr(g) (reverse reaction arrow->

    asked on May 24, 2011
  32. bioloy

    Choose ONE animal species. Your goal is to describe the way in which an evolutionary change might occur for a particular characteristic (trait) of a population of that species as a result of natural selection. The characteristic (trait) could be something

    asked on July 6, 2009
  33. Social Studies

    What do the 15th, 19th, and 26th amendments have in common? A. Voting Rights B. Religious Rights C. African American Rights D. Women's Rights

    asked on October 17, 2017
  34. Pre algebra

    A fair charge an admission fee of $6 for each person. Let C be the cost of admission (in dollars) for P people. Write an equation relating C to P. Then graph your equation using axes

    asked on May 6, 2017
  35. Physics

    A 100 gram mass of metal at 106°C is placed in 100 grams of cool water at 22°C. The final temperature of the mixture is 25°C. What is the specific heat capacity of the metal?

    asked on February 24, 2017
  36. Social studies

    1. which is the most important effect of the Bessmer Process?

    asked on February 16, 2017
  37. Chemistry

    3. The diagram shows an electrochemical cell with a gold strip (left) and aluminum glasses (right). In your response, do the following: • Label the cathode and the anode, including the charge on each. • Show the flow of electrons. • Describe what

    asked on May 13, 2016
  38. Algebra

    Does the data in the table represent a direct variation or an inverse variation? x 1 3 4 7 y 5 15 20 35 Write an equation to model the data in the table

    asked on May 2, 2016
  39. English12

    In Pope's essay on Man, how does the speaker cast humankind's relationship to both God and His creation?

    asked on December 9, 2015
  40. Math

    Sam is 2 years and his mother is 28 years old. In how many years will Sam's mother be 3 times as old as he will be?

    asked on December 6, 2015
  41. Astro

    A newly discovered planet orbits a distant star with the same mass as the Sun at an average distance of 118 million kilometers. Its orbital eccentricity is 0.5. A.Find the planet's orbital period. B.Find the planet's nearest orbital distance from its star.

    asked on March 4, 2015
  42. Chemistry

    In a titration experiment involving an unknown concentration of HCl and a 0.100M solution of NaOH(aq), it was determined that it took 12.5mL of NaOH to neutralize 20.0mL of the HCl(aq). Write a balanced chemical equation for this reaction and determine the

    asked on January 22, 2015
  43. Gen Science 2

    lightning is actually an enormous display of the concept of? A) chemical heating B) solar energy C) magnetism D) groundind

    asked on January 19, 2015
  44. 6th grade math

    5ft 3 in. – 2ft 9 in. = ??

    asked on January 27, 2013
  45. math

    A car rents for $40 per day plus .20 cents per mile. your budget is $92 daily.What mileage will allow you to stay in budget?

    asked on December 20, 2011
  46. Psychology

    In plain words, can you tell me the difference between reciprocal interactionism and mechanistic interactionism? I am just not sure I understand this well enough to do my assignment yet.

    asked on May 26, 2011
  47. Chemistry

    2 Ch(aq) + Em(aq) + Is(s) + T(g) ⇄ Ry(aq) + 3 Ro(s) + 4 X(g) ΔHrxn=35.6 kJ/mol Name three things that you could do to make the equilibrium below run to the left. What direction would the reaction shift if you added water? Please help me!!

    asked on May 24, 2011
  48. Chemistry

    Cyclohexane, C6H12, a hydrocarbon, can isomerize or change into methylcyclopentane, a compound of the same formula (C5H9CH3) but with a different molecular structure. The equilibrium constant is 0.12 at 25°C. If you had originally placed 0.036 mol of

    asked on May 24, 2011
  49. Chemistry

    2 NO(g) + 2 H2(g) --> N2(g) + 2 H2O(g) Reactant Concentration(mol/L) and Rate of Appearance of N2 [NO] [H2] (mol/L·s) 0.420 0.122 0.136 0.210 0.122 0.0339 0.210 0.244 0.0678 0.105 0.488 0.0339 What is the rate constant?

    asked on May 15, 2011
  50. Trigonometry

    Determine the number of triangles ABC possible with the given parts. b=60 a=82 B=100

    asked on February 5, 2011
  51. osu

    a 50.0 ml sample of a 15% (m/v) solution of H2SO4 is added to water to give a final volume of 250.0 ml. What would the final concentration be?

    asked on November 23, 2010
  52. General Chemistry

    The photogenic work function of a metal is the minimum energy needed to eject an electron by irradiating the metal with light. For calcium, this work function equals 4.34 x 10^-19 J. What is the minimum frequency of light for the photoelectric effect in

    asked on January 13, 2008
  53. Chemistry

    which solution has the highest boiling point? a. 1 mole of NaNO3 in 500 g of water b. 1mole of NaNO3 in 1000g of water c. 1mole of NaNo3 in 750g of water d. 1mole of NaNo3 in 250 g of water The boiling point of water is elevated by about 0.5 degree for a 1

    asked on March 26, 2007
  54. Chemistry

    a lolution in which the crystalizing rate of the solute equals the dissolving rate of the solute must be? saturated?

    asked on March 26, 2007
  55. Chemistry

    I recently did a lab about double replacements and precipitates, my first post lab question asks me to write a proposed reaction for each double replacement reaction I did, in Molecular, Ionic and Net ionic form. My first reaction was KI and Ca(NO3)2 The

    asked on May 7, 2020
  56. Chemistry

    When a mixture of 13.0 g of acetylene (C2H2) and 13.0 g of oxygen (O2) is ignited, the resultant combustion reaction produces CO2 and H2O. How many grams of C2H2 are present after the reaction is complete? How many grams of CO2 are present after the

    asked on February 25, 2020
  57. United States History

    What was the primary goal of the National Association for the Advancement of Colored People? A. Ending racial discrimination B. Electing African Americans to office C. Establishing a separate government D. Separating white people and African Americans

    asked on October 11, 2019
  58. Social Studies

    Which Korean War outcomes are still in place today? A) The U.N gave Russia power over North Korea, and US troops left South Korea. B) North and south Korean leaders signed a treaty, and North Korea became a democracy. C) North and South Korea became one

    asked on May 13, 2019
  59. Physics

    A proton moves in a constant electric field E from A to pointB. The magnitude of the elctric field is 4.2x10^4 n/c; Thedirection opposie to that of the proton. If the distance from pointA to point B is 0.18m, what is the change in the proton's

    asked on April 5, 2018
  60. Social Studies

    What did we gain of the treaty of Versailles out of the fourteen points plan?

    asked on October 17, 2017
  61. Algebra

    Suppose that you work part time as a sales representative at a car dealership. You earn a base salary of $125 per week plus a 18% commission on all sales that you make. Your best friend has exactly the same job at another car dealership but earning a base

    asked on November 15, 2016
  62. civics

    Research how your local government works. Briefly explain the process to pass a law (usually called an ordinance or code) in your city or county. To introduce the idea in my city or county, first I would

    asked on November 15, 2016
  63. Chemistry

    25.0 mL of an H3BO3 solution were titrated with 29.15 mL of a 0.205 M LiOH solution to reach the equivalence point. what is the molarity of the H3BO3 solution?

    asked on August 23, 2016
  64. Chemistry

    When it comes to something being spontaneous, what does it mean? I know its something that goes out without no outside force or something like that but what are example of something that is spontaneous ?

    asked on May 25, 2016
  65. Chemistry

    For the reaction: 2NO(g) + H2(g) N2O(g) + H2O(g) + energy Write the equilibrium constant expression for the reaction. I wrote: [N2O][H2O] / [NO]2 [H2] This reaction takes place at 25°C. At this temperature the concentration of NO is found to be 1.75

    asked on April 13, 2016
  66. Science

    For the reaction: 2NO(g) + H2(g) N2O(g) + H2O(g) + energy Write the equilibrium constant expression for the reaction. This reaction takes place at 25°C. At this temperature the concentration of NO is found to be 1.75 mol/L, the concentration of H2 is 3.00

    asked on April 13, 2016
  67. Chemisty

    For the reaction: 2NO(g) + H2(g) N2O(g) + H2O(g) + energy Write the equilibrium constant expression for the reaction. This reaction takes place at 25°C. At this temperature the concentration of NO is found to be 1.75 mol/L, the concentration of H2 is 3.00

    asked on April 13, 2016
  68. Chemisty

    For the reaction: 2NO(g) + H2(g) N2O(g) + H2O(g) + energy Write the equilibrium constant expression for the reaction. This reaction takes place at 25°C. At this temperature the concentration of NO is found to be 1.75 mol/L, the concentration of H2 is 3.00

    asked on April 13, 2016
  69. Math

    The diameter of a car's tire is 60cm. While the car is being driven, the tire picks up a nail. At what times in two complete cycles is the nail at a height of 1cm above the ground. So far, I have calculated the circumference of the wheel (188.5) and I do

    asked on January 24, 2016
  70. science

    Specific heat capacity of solid ethanol is 2.419 J/g C. Melting point temperature of ethanol is -114.4 C/ 158.8 K. Enthalpy of fusion of ethanol is 106.4 J/g. Specific heat capacity of liquid ethanol is 2.440 J/g C. 44.0 g of solid ethanol at -134.4 C is

    asked on November 23, 2015
  71. Managerial Accounting

    Doughboy Bakery would like to buy a new machine for putting icing and other toppings on pastries. These are now put on by hand. The machine that the bakery is considering costs $78,000 new. It would last the bakery for ten years but would require a $9,000

    asked on August 1, 2015
  72. Managerial Accounting

    Direct materials: 7 microns per toy at $0.32 per micron Direct labor: 1.2 hours per toy at $6.80 per hour During July, the company produced 4,600 Maze toys. Production data for the month on the toy follow: Direct materials: 70,000 microns were purchased at

    asked on July 31, 2015
  73. please help english

    1. Which phrase, in "The Prisoner Who Wore Glasses," best describes Brille? (1 point) easygoing and generous with his friends intelligent, yet shortsighted in his political views intuitive and calculating in his appraisal of others quick­thinking and

    asked on December 4, 2014
  74. Algebra

    You have been hired by a cell phone company to create two rate plans for customers, one that benefits customers with high usage. The cell phone rates may compare usage of minutes or usage of text messaging. At 500 minutes or 200 text messages, both plans

    asked on October 24, 2014
  75. physics

    a Baseball player throws a ball for the outfield horizontally such that it is released 1.5 meters above the ground. if the ball is to reach second base 20.0 meters away, how fast must the ball be thrown so that is does not bounce before reaching the base

    asked on September 30, 2014
  76. English

    What is the subject and the verb of the sentence : A police officer stepped into the street and stopped cars .

    asked on May 20, 2014
  77. Biology

    Hydrolysis uses a catabolic reaction. Explain what a catabolic reaction is and how it is useful in creating monomers from polymers.

    asked on April 16, 2014
  78. Chemistry

    The activation energy of a certain reaction is 34.9kJ/mol . At 23 ∘C , the rate constant is 0.0190s−1. At what temperature in degrees Celsius would this reaction go twice as fast?

    asked on February 23, 2014
  79. chemistry

    By how much will the vapor pressure of water decrease if a solution at 40.0°C is produced by dissolving 16.0212 g of K3PO4 (formula mass = 212.30 g/mol) with 40.8480 g of water. The vapor pressure of pure water at this temperature is 55.30 mmHg. If the

    asked on February 21, 2014
  80. chemistry

    an aspirin contains .324 g of aspirin. how many pounds of aspirin are in a 500 aspirin of bottle

    asked on September 2, 2013
  81. Math 11

    Is it possible to construct a rectangle whose length is 1cm less than twice its width, and whose area is 40cm^2? If your answer is yes, determine the dimensions of the rectangle to the nearest tenth of a centimetre. If your answer is no, explain why it is

    asked on February 13, 2013
  82. science

    A golfer takes two putts to sink his ball in the once he is on the green. The first putt displaces the ball 6.00 m east, and the second putt displaces it 5.40 m south. What displacement would put the ball in the hole in one putt? and how do I show this

    asked on January 9, 2013
  83. physics

    A 10.8 kg block of metal is suspended from a scale and immersed in water, as in the figure below. The dimensions of the block are 12.0 cm 10.4 cm 10.4 cm. The 12.0 cm dimension is vertical, and the top of the block is 5.00 cm below the surface of the

    asked on November 10, 2012
  84. physics

    Assume that if the shear stress in steel exceeds about 4.00 108 N/m2, the steel ruptures. (a) Determine the shearing force necessary to shear a steel bolt 1.40 cm in diameter. (b) Determine the shearing force necessary to punch a 1.75-cm-diameter hole in a

    asked on November 10, 2012
  85. chem

    Is there any simple way to predict the volume of a second back titration done on a particular antacid substance after completing a titration the first time around?..Thank you every one for responses.

    asked on November 10, 2011
  86. Chemistry

    2 L(g) + An(aq) + 3 Gw(s) + 2 I(g) 2 Gd(aq) + 3 A(g) + Y(s) What direction would the reaction shift if the volume of the container was increased? left or right? What direction would the direction shift if some additional water was added? left or right? and

    asked on June 3, 2011
  87. Chemistry

    NH4HS(s) reverse reaction arrow NH3(g) + H2S(g) Using Le Chatelier's principle, explain how increasing the temperature would affect the equilibrium.

    asked on May 25, 2011
  88. Chemistry

    How is Surface catalyst(heterogeneous) and homogeneous catalyst different? I'm in 10th grade chemistry and I don't understand it.

    asked on May 24, 2011
  89. Chemistry

    Use Hess' Law to calculate the heat of the following equation. Show all work including the reactions that you use, in the form that you use them. 2 C + 2 NO2 ---> 2 CO 2 + N 2

    asked on April 24, 2011
  90. Social Studies Paper

    I have to write a paper about my neighborhood (east flat rock NC) using 3 of the 5 themes of geography. The 3 that I used were: Place, Location, and Human-Environment Interaction. I need some help on some ideas I could use for human-environment

    asked on March 9, 2011
  91. writing process part 2

    i need help on writing an eight sentence paragraph. i get a great idea(thought)about what to write and when i do start writing i freak out and go blank.

    asked on November 30, 2010
  92. french

    Hi, if I want to say: I will go to China, Greece, and Egypt. ...would this be correct?: J'irai en Chine, la Grece, et l'Egypte. Or would I just list them? Thanks!

    asked on March 27, 2011
  93. Physics

    At an amusement park, a swimmer uses a water slide to enter the main pool. If the swimmer starts at rest, slides without friction, and descends through a vertical height of 2.28 m, what is her speed at the bottom of the slide?

    asked on October 4, 2010
  94. math

    whts d answer 4 d pizzazz workseet that says "did u hear about...."

    asked on September 30, 2010
  95. physics

    A beam of negligible mass of length 3 m is suspended by a string attached to a wall such that the angle between beam and string is 30 degree, and the beam is held horizontal with a sky weight. Find the tension in the string? Find the compression force on

    asked on September 20, 2010
  96. trig

    an airplane leaves the airport and flies due west 150 miles and then 240 miles in the direction 200°40'. Assuming the earth is flat, how far is the plane from the airport at this time( to the nearest mile)?

    asked on March 26, 2010
  97. Geometry-properties of tangents of a circle

    Circle L has segment LJ and segment LK as radii. Those 2 segments are perpendicular. Segment KM and segment JM are tangent to circle L. Is triangle JLM congruent to triangle KLM? Please explain.

    asked on March 25, 2010
  98. chemistry

    When surface water dissolves carbon dioxide, carbonic acid (H2CO3) is formed. When the water moves underground through limestone formations, the limestone dissolves and caves are sometimes produced. CaCO3(s) + H2CO3(aq) Ca(HCO3)2(aq) What mass of limestone

    asked on February 9, 2010
  99. statistics

    Suppose that you got a score of X=78 on an English test for which the mean was (mu)=70 and the standard deviation was (lower case sigma)=10. Also, suppose that you got a scores of X=64 on a Spanish test with mean(mu)=50 and (lower case sigma)=7. For which

    asked on February 4, 2008
  100. help needed !!! URGENT

    Can some one help me I don’t know what to take out from the aspirin molecule, for the following structures? I have to generate a copy of the molecular structure of aspirin and then for each of the molecular features listed in (i) – (iii) have to

    asked on June 30, 2007


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