Most popular questions and responses by Jess
  1. algebra

    what happened when two fruit companies merged? this question is on a worksheet i have to do.

    asked on March 11, 2008
  2. AP Chem

    CH3CH2NH2(aq) + H2O(l) CH3CH2NH3+(aq) + OH-(aq) Kb = 5.0e-4 Ethylamine, CH3CH2NH, a weak base reacts with water according to the equation above. A 50.0 mL sample of a ethylamine solution is found to have a pH of the solution 11.60. (a) Write the expression

    asked on April 23, 2013
  3. english

    what does these quote mean? 1.)"my life for itself and not for a spectacle" 2.)An institution is the lengthened shadow of a man. 3.) Life only avails, not the having lived. 4.) Insist on yourself; never imitate Thanks for your help!

    asked on January 4, 2009
  4. english

    In the Odyssey, which of Odysseus' traits allows him to triumph in the bow-and-arrow challenge that Penelope sets for her suitors? (1 point) his love for Penelope his loyalty to the gods **** his pride in his bow his skill as a marksman i think B

    asked on January 29, 2016
  5. Exexponential Growth Modeling

    Researchers find that there are 60 Raccoons on an island. When they return a year later, they find that there are 84. What is the annual population growth rate for the raccoons?

    asked on April 30, 2016
  6. math

    which three-dimensional figure has all triangular faces? A. triangular prism B. triangular pyramid***i pick B.*** C. rectangular pyramid D. cone

    asked on April 1, 2016
  7. Science

    Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic? Help please

    asked on November 28, 2016
  8. math

    Suppose that the population of deer in a state is 19,900 and is growing 3% each year. Predict the population after 10 years. (1 point) A.about 274,338 deer B.about 26,744 deer**** D.about 597,000 deer C.about 204,970 deer i need help i don't if i'm right

    asked on January 27, 2016
  9. english

    II. By the end of Romeo and Juliet, Paris and Romeo, both of whom loved Juliet, are dead. The two characters, however, are very different. Write an essay comparing and contrasting the two men. The introduction of your essay should include an

    asked on March 14, 2016
  10. computer technology

    what type of link is used to call this file?

    asked on January 3, 2016
  11. physics

    A meter stick is pivoted at its 50-cm mark but does not balance because of non-uniformities in its material that cause its center of gravity to be displaced from its geometrical center. However, when masses of 150 and 200 grams are placed at the 10-cm and

    asked on June 25, 2010
  12. CALC

    Solve the Equation: 1. 2^x + 2^-x = 5 2. Log2x + log2(4 – x) = 0 thanks. i'm not sure how to approach this at all.

    asked on July 22, 2009
  13. Math - Limits/Derivatives

    Suppose that for a company manufacturing calculators, the cost, revenue, and profit equations are given by C = 70,000 + 20x R = 300x - (x^2 / 20) P = R - C where production output in 1 week is x calculators. If production is increasing at a rate of 600

    asked on October 19, 2013
  14. Physics

    A 72.0 kg swimmer jumps into the old swimming hole from a tree limb that is 4.00 m above the water. Part A- Use energy conservation to find his speed just as he hits the water if he just holds his nose and drops in. Part B- Use energy conservation to find

    asked on November 24, 2017
  15. english

    For the following questions, match each word to its definition by filling in the correct letter. wise deceptively charming enormous passion sound; fit competing awe-inspiring sinister; threatening Use the word bank to answer the question. 4. ardor (1

    asked on January 29, 2016
  16. Calculus - Optimization

    A fence is to be built to enclose a rectangular area of 800 square feet. The fence along 3 sides is to be made of material $4 per foot. The material for the fourth side costs $12 per foot. Find the dimensions of the rectangle that will allow for the most

    asked on November 17, 2013
  17. Chemistry

    Chromium (III) iodate has a Ksp at 25°C of 5.0 x 10–6. 125 mL of a solution contains 0.0050 mol L–1 Cr (III) ion. What is the molar solubility of chromium (III) iodate at 25°C? a. 8.4 x 10–2 mol L–1 b. 2.2 x 10–3 mol L–1 c. 6.3 x 10–2 mol

    asked on May 27, 2016

    As a technician in a large pharmaceutical research firm, you need to produce 450. mL of 1.00 M a phosphate buffer solution of pH = 7.20. The pKa of H2PO4− is 7.21. You have 2.00 L of 1.00 M KH2PO4 solution and 1.50 L of 1.00 M K2HPO4 solution, as well as

    asked on September 18, 2016
  19. chemistry

    I keep thinking that 3 is the van't hoff factor for ammonium chloride, but I keep getting my answer wrong. Any ideas?

    asked on February 11, 2011
  20. Social Studies

    The federal system and the unitary system most differ in that, A-): The unitary system has many different levels of government, but the federal system does not. B-): The Federal system allows citizens to vote on leaders, but the unitary system does not.

    asked on March 24, 2016
  21. chemistry

    The equilibrium constant for the reaction Cu3(PO4)2(s)    3 Cu2+(aq)  +  2 PO43–(aq) is K = 1.40 x 10–37.  Suppose that a beaker is filled to 1 L with a solution containing [Cu2+] = [PO43–] = 10.0 nM, and 300.0 g Cu3(PO4)2 . Which of

    asked on June 7, 2016
  22. Social Studies

    How did immigration affect immigrants and other Americans around 1900?

    asked on April 27, 2017

    Bender Electronics buys keyboards for its computers from another company. The keyboards are received in shipments of 175 boxes, each box containing 30 keyboards. The quality control department at Bender Electronics first randomly selects one box from each

    asked on October 24, 2014
  24. Math

    Kaitlyn needs 3 pounds of fruit for a salad. She already has 3/4 pound of apples and 1/3 pound of grapes. What fruits Kalen can add she already has to make exactly 3 pounds of fruit. Choices are 2/3 1/8 3/4

    asked on December 19, 2017
  25. English-Metaphors

    Which of the following excerpts from Frost's poems is NOT a metaphor? A.Magnified apples appear and disappear / Stem end and blossom end B.Spring is the mischief in me C.My apple trees will never get across / And eat the cones under his pines, I tell him.

    asked on February 8, 2012
  26. Calculus - Optimization

    A parcel delivery service a package only of the length plus girth (distance around) does not exceed 24 inches. A) Find the dimensions of a rectangular box with square ends that satisfies the delivery service's restriction and has a maximum volume. What is

    asked on November 16, 2013
  27. geometry

    the perimeter of a triangle is 59 inches. the longest side is 11 inches longer than the medium side, and the medium side is 3 inches more than the shortest side. Find the length of each side.

    asked on May 4, 2010
  28. Geometry

    In a garden, a birdbath 2ft 6 in. tall casts an 18-in. shadow at the same time an oak tree casts a 90-ft shadow. How tall is the oak tree?

    asked on April 14, 2014
  29. Finance - Capital Budgeting/Cost-cutting

    Caradoc Machine Shop is considering a four-year project to improve its production efficiency. Buying a new machine press for $560,000 is estimated to result in $210,000 in annual pre-tax cost savings. The press falls into Class 8 for CCA purposes (CCA rate

    asked on December 1, 2013
  30. math

    You are still debating about the two different computers. If you are paid $15.00/hour and your deductions are FICA (7.65%), federal tax withholding (12%), and state tax withholding (8%), how many hours do you have to work to pay for the new computer? Be

    asked on December 15, 2015
  31. Calculus - Integrals

    The projected rate of increase in enrollment at a new college is estimated by dE/dt = 6,000(t+1)^-3/2 where E(t) is the projected enrollment in t years. If the enrollment is 3,000 now (t=0), find the projected enrollment 15 years from now.

    asked on November 21, 2013
  32. physics

    a 1 kg mass is attached to a spring hanging vertically and hangs at rest in the equilibrium position. the spring constant of the spring is 1 n/cm. the mass is pulled downward 2 cm and released. what is the speed of the mass when it is 1 cm above the point

    asked on March 23, 2011
  33. Math

    A theater group made appearances in two cities. The hotel charge before tax in the second city was $1000 higher than in the first. The tax in the first city was 4% , and the tax in the second city was 7% . The total hotel tax paid for the two cities was

    asked on April 1, 2013
  34. Calculus

    Determine the interval on which f(x) = ln(x) is integrable. (0, ‡) [0, ‡) (−‡, 0) U (0, ‡)(MY ANSWER) All reals

    asked on March 15, 2016
  35. Chemistry

    If 3.0 liters of oxygen gas react with excess carbon monoxide at STP, how many liters of carbon dioxide can be produced under the same conditions? 2 CO (g) + O2 (g) ---> 2 CO2 (g)

    asked on February 4, 2015
  36. English

    It must be nice," she said. "It must be very nice. I wish women could do such things." "It ain't the right kind of a life for a woman. Her upper lip raised a little, showing her teeth. "How do you know? How can you tell?" she said. "I don't know, ma'am,"

    asked on February 20, 2012
  37. chemistry

    Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s) + H2O(l) ¨ Ca(OH)2(s) In a particular experiment, a 2.00-g sample of CaO is reacted with excess water and 2.14 g of Ca(OH)2 is recovered. What is the percent

    asked on October 26, 2011
  38. Physics

    A stone used in the sport of curling has a mass of 20.0 kg and is initially at rest, sitting on a flat ice surface. It is pushed with a constant force of magnitude 25.0N over a distance of 4.00 m. (Assume friction between the stone and the ice is

    asked on December 3, 2018
  39. Chemistry

    Use standard enthalpies of formation to determine ΔHorxn for: 2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(l) Enter in kJ.

    asked on October 21, 2014
  40. 11th grade physics

    A car slows down from +32 m/s to +8 m/s in 4s. Calculate the acceleration .

    asked on November 29, 2010
  41. algebra

    Find the values of the 30th and 90th percentiles of the data. 129, 113, 200, 100, 105, 132, 100, 176, 146, 152 i found 30th to be 105 and 90th to be 176 because i think its 30/10 * 10 = 3?? im not sure

    asked on January 25, 2019
  42. Personal fitness

    There are three important benefits to the warm up session: (1 point) flexibility is increased, the muscle is pushed to its full potential, and the chance of dizziness or fainting caused by the pooling of blood in the extremities is reduced. aids in the

    asked on January 28, 2016
  43. Social Studies

    Which of the functions would an international organization not perform? A-) Encourage greater trade among nation-states. B-) Help establish treaties between nation-states. C-) Set binding laws for nation states. ***** D-) Support multinational health and

    asked on March 24, 2016
  44. Chemistry

    Zinc has three major and two minor isotopes. For this problem, assume that the only isotopes of zinc are the major ones, zinc-64, zinc-66, and zinc-68. The atomic mass of zinc-64 is 63.9291 Da, that of zinc-66 is 65.9260 Da, and that of zinc-68 is 67.9248

    asked on May 3, 2013

    A wet bar of soap slides freely down a ramp 12.0 m long, inclined at 74.0 degrees. How long (in seconds) does it take to reach the bottom? (Neglect friction.)

    asked on March 7, 2012
  46. English-please help!

    It must be nice," she said. "It must be very nice. I wish women could do such things." "It ain't the right kind of a life for a woman. Her upper lip raised a little, showing her teeth. "How do you know? How can you tell?" she said. "I don't know, ma'am,"

    asked on February 21, 2012
  47. Chem

    An electrochemical cell based on the decomposition of H2O2 can be constructed based on the half-reactions in the table below. Half-Reaction | Standard Reduction Potential, E° H2O2+ 2e- => 2 OH- | 0.88 V O2+ 2 H2O + 2e- => H2O + 2 OH- | -0.15 V (d)

    asked on April 23, 2013
  48. Geometry

    Quadrilateral GHIJ is a scale drawing of quadrilateral ABCD with a scale factor r. Describe the following statements as always true, sometimes true, or never true, and justify your answer. a. AB/GH = BC/HI b. perimeter (GHIJ) = r * perimeter (ABCD) c. Area

    asked on February 13, 2015
  49. Math

    A charter fishing company buys a new boat for $224,000 and assumes that it will have a trade-in value of $115,200 after 16 years. Find a linear model for the depreciated value V of the boat t years after it was purchased.

    asked on October 23, 2013
  50. Physics

    A rope is used o pull a metal box 15.0m across the floor. The rope is held at an angle of 46.0 degrees with the floor and a force of 628N is used. How much work does the force of the rope do?

    asked on January 26, 2010
  51. Economic

    Why does globalization sometimes cause job loss in developed nations? a. Globalization prevents companies from hiring more workers. b. The movement of jobs to other countries can cause unemployment. c. Working conditions in LDCs are often worse than in

    asked on April 27, 2017
  52. physics

    An object moves along a circular path with a constant speed, |⃗vo|. (Semi Circle with point A on one side point B on the other. Looks like a 90 degree angle with points A and B on either side of the hypotenuse.) The average acceleration in going from A

    asked on November 8, 2012
  53. Chemistry

    how much chlorine, Cl 2, do you need to order to react completely with 500 kg of platinum, Pt, to make cisplatin, PtCl 2(NH 3) 2?

    asked on June 5, 2012
  54. chemistry

    The two isotopes of uranium, 238U and 235U, can be separated by effusion of the corresponding UF6 gases. What is the ratio (in the form of a decimal) of the root-mean-square speed of 238UF to that of 235UF6 at constant temperature?

    asked on November 9, 2010
  55. Physics Part A HELP!!

    4.) In coming to a stop, a car leaves skid marks 80m long on the highway. Assuming a DEceleration of 7.00 m/s^2 (m/s/s), estimate the speed of the car just before breaking. 6.) A car traveling @ 90km/h strikes a tree. The front end of the car compresses

    asked on December 14, 2015
  56. high school physics

    Annie rides her snowboard down a hill sloped at 25 degrees. The coefficient of kinetic friction between her and her skies is .15. If her mass is 55 kg, hw fast is she excelerating? Assuming she starts from rest and the equation is v=v+a*t, what is her

    asked on December 8, 2010
  57. Chemistry

    A 1.24-g sample of a hydrocarbon, when completely burned in an excess of O2(g), yields 4.04 g CO2 and 1.24 g H2O Draw a plausible structural formula for the hydrocarbon molecule. I think I understand how to get it to an empirical formula but I don't know

    asked on April 15, 2019
  58. Chemistry

    A scuba diver creates a spherical bubble with a radius of 4.0cm at a depth of 30.0m where the total pressure (including atmospheric pressure) is 4.00 atm. What is the radius of the bubble when it reaches the surface of the water? (Assume atmospheric

    asked on November 20, 2010
  59. math

    How can you use subtraction to complete an addition pattern? use this exercise as an example: 32, 39, 46, 53, 60, 67.

    asked on February 19, 2012
  60. linear modeling

    The fair market rental rate for Columbus was $730 in 2013 and $551 in 2003. Find the average rate of change for rent in Columbus during this period.

    asked on April 24, 2016
  61. Chemistry

    1. The value of ΔH° for the reaction below is -6535 kJ. _________ kJ of heat are released in the combustion of 16.0 g C6H6 (l). 2C6H6 (l) + 15O2 (g) --> 12CO2 (g) + 6H20 (l) 3. Given the following reactions CaCO3 (s) --> CaO (s) + CO2 (g) ΔH = 178.1 kJ

    asked on October 31, 2017
  62. physics 100

    An aluminum wing on a passenger jet is 30 m long when its temperature is 20°C. At what temperature would the wing be 5 cm (0.05 m) shorter?

    asked on February 26, 2015
  63. Chemistry

    I've been trying to figure out how to go about answering this question and don't even know where to start. Any help would be greatly appreciated The oxidation of NH3 to NO in the Ostwald process must be very carefully controlled in terms of temperature,

    asked on March 20, 2019
  64. chemistry

    1.2 mol of CH3OH(g) are injected into a 2.0 L container and the following equilibrium becomes established. 2H2(g) + CO(g) CH3OH(g) + 92 kJ If at equilibrium 1.0 mol of CH3OH is still in the container the Ke must be which of the following? a. 25 d. 12.5 b.

    asked on March 12, 2010
  65. Algebra

    allan borrowed $6400 from his father to buy a car. he repaid him after 9 months with interest of 8% per year. find the total amount he repaid.

    asked on November 30, 2017
  66. Math - Decimals

    Is 0.052 or 0.05 a bigger number?

    asked on June 5, 2013
  67. Math

    Sue decides to collect postcards. She starts her collection with seven cards. Every week, she buys three more cards to add to her collection. How many weeks will it take her to have more than 30 cards? 11 7 8 30 Can somone help me figure out the equation

    asked on September 7, 2018
  68. Organic Chemistry

    Label each reactant according to it role or roles in the chemical reaction? Two different (OH-) + (HBr) ----> (HOH) + (Br-) (OH-) + (H3CBr) ----> (H3COH) +(Br-) Lewis base, bronsted base, nucleophile, lewis acid, bronsted acid, nucleophile

    asked on September 15, 2014
  69. chem

    calculate the concentration of borate ion for a titration when 6.0998g borax is dissolved in 100mL of water and titrated with 25.5mL of HCl

    asked on April 24, 2012
  70. physics

    at what altitude should a satellite be placed into circular orbit so that its orbital period is 48 hours? the mass of the earth is 5.976x10^24 kg and the radius of the eatrh is 6.378x10^6 m.

    asked on March 23, 2011
  71. Physics

    An advertisement claims that a particular automobile can "stop on a dime". What net force would actually be necessary to stop an automobile of mass 850Kg traveling initially at a speed of 43.0 km/h in a distance equal to the diameter of a dime, which is

    asked on March 14, 2010
  72. Chem

    A scuba diver creates a spherical bubble with a radius of 4.0 at a depth of 30.0 where the total pressure (including atmospheric pressure) is 4.00 . What is the radius of the bubble when it reaches the surface of the water? (Assume atmospheric pressure to

    asked on November 20, 2010
  73. Physics

    An electron and a proton move in circular orbits in a plane perpendicular to a uniform magnetic field B. Find the ratio of the radii of their circular orbits when the electron and the proton have the same momentum. Find the ratio of the radii of their

    asked on September 28, 2010
  74. algebra

    Consider the leading term of the polynomial function. What is the end behavior of the graph? Describe the end behavior and provide the leading term. -3x5 + 9x4 + 5x3 + 3

    asked on January 8, 2019
  75. physics

    The data in the following table describe the initial and final positions of a moving car. The elapsed time for each of the three pairs of positions listed in the table is 0.52 s. Review the concept of average velocity in Section 2.2 and then determine the

    asked on September 13, 2015
  76. chemistry

    assuming x=1, how much CuSO4.5H20 would you need to prepare 6 grams of copper ammine complex?

    asked on March 15, 2010

    Strontium metal is responsible for the red color in fireworks. Fireworks manufacturers use strontium carbonate, which can be produced by combining strontium metal, graphite (C), and oxygen gas. The formation of one mole of SrCO3 releases 1.220 x 10^3 kJ of

    asked on February 1, 2007
  78. Math

    Suppose the number of hours a type of light bulb will burn is normally distributed with a mean 84 with a standard deviation of 9 hours. what is the probability one of these bulbs will burn for more than 90 hours? If a sample of 24 of this type of bulb is

    asked on April 16, 2019
  79. Chemistry

    The temperature of a lead fishing weight rises from 26 C to 38 C as it absorbs 11.3 J of heat. What is the mass of the fishing weight in grams? ( The specific heat capacity of lead is 0.128 J /g C )

    asked on February 15, 2018
  80. Chemistry

    1. A combination reaction may also be a displacement reaction. True or False 2. The combustion of an element is always a combination reaction. True or False For number 1, I first thought true, but then again, nothing is being displaced in a combination

    asked on November 19, 2014

    Fats help maintain your cell membranes. (1 point) True False 12. Your body does not use energy when you sleep. (1 point) True False 13. People with anorexia nervosa eat large amounts of food and then purge. (1 point) True False 14. Your body image is the

    asked on December 5, 2012
  82. chemistry

    Calculate the number of grams of h2c2o4.2h2o needed to prepare exactly 250mL of a 0.200 N solution of the acid?

    asked on March 16, 2012
  83. math

    the greatest common factor of 2x4x6x8x10 and 1x2x3x4x5 is A. 2 B. 4 C. 8 D. 120

    asked on September 1, 2018
  84. chemistry

    A buffer is prepared consisting of 0.75 mol of sodium dihydrogenphosphate, NaH2PO4, and 0.60 mol of sodium hydrogenphosphate, Na2HPO4, dissolved in 600.0 mL of water. The Ka for the dihydrogenphosphate ion is 6.2 x 10–8 at 25°C. Which of the following

    asked on May 27, 2016
  85. orgo

    What is the pH of a 5.00E-2 M solution of acetylsalicylic acid, pKa = 3.52.

    asked on September 14, 2012
  86. chemistry

    write the balanced chemical equation for the reaction that occurs when water is added to anhydrous BaCl2. would it be BaCl2+2H2o --> BaCl2+2H2O

    asked on September 11, 2011
  87. Organic Chemistry

    We've been working on extraction of known/unknown compound mixtures lately, and we have to give equations for the acid-base reactions that occurs between HCl, NaOh and (a) R-COOH (b) R-NH2, and (c) Neutral compounds (naphthalene and triphenylmethanol) For

    asked on September 27, 2008
  88. Chem 2

    A 0.15 M solution of butanoic acid, C3H7COOH, has a pH of 2.8210. Find the Ka of butanoic acid. Call buanoic acid HB. Then the ionization is HB ==> H^+ + B^- To start (HB) = 0.15 (H^+) = 0 and (B^-) = 0 After ionization, (H^+) = x but that is found by

    asked on July 19, 2007
  89. Algebra 2

    five chips numbered 1 through 5 are placed in a bag. A chip is drawn and replaced. Then a second chip is drawn. Find the probability that the first chip is even and the other one is odd.

    asked on May 30, 2012
  90. chem

    Calculate the boiling point elevation of a solution containing 50.0 g of glucose dissolved in 500.0 g of water? We just started learning about this and i don't get it!

    asked on May 25, 2010
  91. chemistry

    Determine the ratio of cations to anions for the following ionic compounds a. potassium, a salt substance b. calcium floride, used in steel industry c. aluminum oxide, known as corundum in the crystalline form d. calcium oxide, used to remove sulfur

    asked on October 24, 2010
  92. Literature

    Please can you check my answer.. 13. According to Renaissance philosophy, commoners often represent A. reason. C. pride. B. love. D. appetite. I think it it... B. love. It that correct ?

    asked on January 18, 2010
  93. writing skils

    In the metaphor of language as a layer cake given in your study unit, which of the following words could be considered to be a frosting word?

    asked on September 12, 2008
  94. Social Studies

    I got 3 last questions to ask. 1. Nation state a and nation state b share a border. the two nation-states are arguing over immigration policies regarding the border. what are two ways that the nation-sates could resolve their dispute? 2. How might citizens

    asked on March 24, 2016
  95. Chem URGENT

    How much energy (in kilojoules) is released when 13.3g of steam at 114.5∘C is condensed to give liquid water at 67.0∘C? The heat of vaporization of liquid water is 40.67 kJ/mol, and the molar heat capacity is 75.3 J/(K⋅mol) for the liquid and 33.6

    asked on June 17, 2014
  96. Macroeconomics

    Suppose GDP is $800 billion, taxes are $150 billion, private saving is $50 billion and public saving is $20 billion. Assuming this economy is closed, calculate consumption, government purchases, national saving and investment.

    asked on February 14, 2013
  97. Physic

    A block (mass 2.4 kg) is hanging from a massless cord that is wrapped around a pulley -3 2 (moment of inertia of the pulley = 1.3 x 10 kg·m ), as the drawing shows. Initially the pulley is prevented from rotating and the block is stationary. Then, the

    asked on February 4, 2013
  98. Chemistry

    The half life of radon 222 is 3.82 days. If the initial mass of a sample of radon 222 is 198.72 grams, how much will remain after 19.25 days?

    asked on September 29, 2016
  99. chemistry

    Suppose that 9.6 mL of 1.5 M KOH(aq) is transferred to a 250 mL volumetric flask and diluted to the mark. It was found that 31.5 mL of this diluted solution solution was needed to reach the stoichiometric point in a titration of 9.6 mL of a phosphoric acid

    asked on May 29, 2016
  100. Physics

    A stone is thrown vertically upwards from the top of a tower 50.0m high with an intial velocity of 20.0m/s. (a) whats the maximum height the stone reaches? (b) Whats the time it takes to reach the maximim height? (c) What is the total distance it covers?

    asked on November 16, 2010


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