Most popular questions and responses by Lisa
  1. Intermediate reading

    Can you help me with the sentence check 2 Chapter 17 and 18 in the improving vocabulary skill workbook?

    asked on January 27, 2013
  2. chemistry HELP!

    Solve an equilibrium problem (using an ICE table) to calculate the pH of each solution: a solution that is 0.170 M in HC2H3O2 and 0.105 M in KC2H3O2

    asked on December 15, 2010
  3. english

    38. Which of the following sentences contains a helping verb? (1 point) Eduardo looked in the basement, but the puppy wasn’t there. Sakkom hung wind chimes because she loves the sound. Roger has never performed a solo in his life. The leader of the troop

    asked on January 11, 2012
  4. Arts

    1. which of the following did the development of linear perspective allow artists to do? a. show human anatomy more accurately* b. paint three dimensional images on a flat surface c. create more exact technical drawings d. build domes with precise

    asked on October 7, 2018
  5. College Chemistry

    Consider the reaction. 4Fe(s) + 3O2(g) ¨ 2Fe2O3(s) If 0.500 mol of Fe reacts with 0.400 mol of O2, what are the limiting reactant and the theoretical yield in moles of Fe2O3 for the reaction, respectively?

    asked on March 26, 2012
  6. History

    Which of the following statements best describes the Mississippians? A. The Mississippians developed a complex culture and lived in large communities. B. The Mississippians lived in the Northwest and hunted and gathered for survival. C. The Mississippians

    asked on October 9, 2018
  7. Reading

    Is this the correct word for each sentence 1-2. Lynn begged the bank to __ the overdraft charge of thirty dollars, telling them that it would entirely __ her savings. 3-4. In high school, Julio was voted "Most Likely to Become a Psychologist." It was the

    asked on February 13, 2013
  8. Social studies

    Please check my answers! How are the governments of jordan and kuwait different from the governments of the united Arab Emirates and oman? A. Citizens of jordan and kuwait can vote. B. Jordan and kuwait have monarchs**** C. The king of jordan and emir of

    asked on December 10, 2018
  9. Science

    Two birds collide in midair. Before the collision, their combined momentum was 88 kg•m/s to the west. What is their combined momentum after the collision? A. 88 kg•m/s east B. 88 g•m/s north C. 88 kg•m/s down D. 88 kg•m/s west

    asked on December 6, 2016
  10. Organic Chemistry

    What are the advantages of using a solvent pair for recrystallization? Select all that apply. A) You can control the solubility of the substance in the mixed solvent. B) You don't have to know the exact amounts of the solvents needed. C) You can quickly

    asked on September 29, 2011
  11. Social studies

    Doestrogen anyone know the answers to the unit 8 lesson 4 quiz? Please help asap! Social studies

    asked on December 10, 2018
  12. languge arts

    the giver which words can be used to describe jonas father very caring and sensitive**** highly intelligent and driven usually loyal and obedient

    asked on May 5, 2016
  13. math

    in the middle of a page draw a small oval oriented vertically connected to the bottom of the oval draw a small rectangle oriented vertically what does this resemble

    asked on June 28, 2016
  14. Physics

    In a baseball a pitcher can accelerate a .15kg ball from rest to 98 mi/h in a distance of 1.7m a) what is the average force exerted on a ball during a pitch? b)If the mass of the ball is increased, is the force required of the pitcher increased, decreased

    asked on February 7, 2013
  15. Chemistry

    Consider the combustion of liquid methanol, CH3OH (l) CH3OH (l) +3/2O2 (g) = CO2 (g) + 2H2O(l) H = -726.5 kJ What is for the reaction represented by this equation? Express your answer using four significant figures

    asked on June 28, 2011
  16. Spanish

    Write four different questions for the following sentences 1. Mariana canta en el coro (choir) de la universidad 2. Carlos busca el libro de arte 3. La profesora Gutierrez ensena contabilidad 4.Ustedes necesitan hablar con el profesor de economia

    asked on October 4, 2014
  17. Math

    Betsy, a recent retiree, requires $6,000 per year in extra income. She has $60,000 to invest and can invest in B-rated bonds paying 13% per year or in a certificate of deposit (CD) paying 3% per year. How much money should be invested in each to realize

    asked on October 6, 2010
  18. Math

    Six neighbors share 4 pies equally. How much of a pie does each neighbor get?

    asked on January 5, 2016
  19. Reading( Immediate)

    Do you have a copy of the sentence check 2 questions for chapter 20 in the 4th edition of Improving Vocabulary Skill book by Sherrie L. Nist?

    asked on February 4, 2013
  20. Chemistry

    Write the acid-dissociation reaction of nitrous acid (HNO2) and its acidity constant expression.

    asked on March 25, 2012
  21. AP Physics

    mgh=1/2mv^2, solve for the variable v

    asked on August 1, 2010
  22. Trig

    A railroad tunnel is shaped like a semiellipse as shown below. A semiellipse is shown on the coordinate plane with vertices on the x axis and one point of intersection with the positive y axis. The height of the tunnel at the center is 27 ft and the

    asked on September 27, 2014
  23. science

    four flasks each contain 100 milliliters of aqueous solutions equal concentrations at 25 degress C and 1 atm. the four flasks are KCL,CH3OH, Ba(OH)2, and CH3COOH. the question is Which solution had the lowest freezing point and explain answer

    asked on May 4, 2008
  24. AP Chem

    For the following equilibrium system, which of the following changes will form more CaCO3? CO2(g) + Ca(OH)2(s) CaCO3(s) + H2O(l) deltaH(rxn) = -113 kJ My choices are: a) Decrease temperature at a constant pressure (no phase change) B) Increase volume at a

    asked on February 26, 2013
  25. Chemistry

    Write balanced complete ionic equation for HC2H3O2(aq) + K2CO3(aq)-----> H2O(l)+CO2(g)+KC2H3O2(aq) I put 2H+(aq)+2C2H3O2-2(aq)2K+(ag)+CO3-2(aq)------>H2O(l)+CO2(g)+2K+(aq)+C2H3O2-2(aq) and said it was wrong, but I got this part right. 2H+(aq)+CO3

    asked on October 29, 2010
  26. Stats

    Running times for 400 meters are Normally distributed for young men between 18 and 30 years of age with a mean of 93 seconds and a standard deviation of 16 seconds. Thus, 99.7% of running times are approximately between Need help

    asked on February 12, 2017
  27. Social studies

    Can someone please check my answers? How are the governments of Jordan and Kuwait different from the governments of the United Arab Emirates and Oman? Citizens of Jordan and Kuwait can vote. B. Jordan and Kuwait have monarchs. C. The king of Jordan and

    asked on December 13, 2018
  28. AP Chemistry

    Which is a stronger base in aqueous solution, IO- or IO3-? Explain.

    asked on April 26, 2010
  29. Chemistry

    A chemist wants to make 4.5 L of a 0.310 M CaCl2 solution what mass of CaCl2 (in g) should the chemist use

    asked on November 1, 2010
  30. Chemistry

    Hydrogen is generated by passing hot steam over iron, which oxidizes to form Fe3O4, in the following equation: a. if 625 g of Fe3O4 is produced in the reaction, how many moles of hydrogen are produced at the same time? b. how many moles of iron would be

    asked on May 28, 2012
  31. Science

    What occurs when a substance melts? 1) It changes from solid to liquid, and heat is absorbed. 2) It changes from solid to liquid, and heat is released. 3) It changes from liquid to solid, and heat is absorbed. 4) It changes from liquid to solid, and heat

    asked on January 9, 2011
  32. Science

    in a true solution, the dissolved particles (1)are visible to the eye (2)will settle out on standing (3)are always solids (4)cannot be removed by filtration

    asked on February 8, 2011
  33. Social studies

    Please check my answers! How are the governments of jordan and kuwait different from the governments of the united Arab Emirates and oman? A. Citizens of jordan and kuwait can vote. B. Jordan and kuwait have monarchs**** C. The king of jordan and emir of

    asked on December 11, 2018
  34. geometry

    If ON=2x-3, LM=7x+2, NM=x+6, and OL=6y-3, find the values of x and y for which LMNO must be parallelogram.

    asked on April 5, 2012
  35. Reading

    Can you help me with the following sentences? 1-2. Although Jenny chose the songs from her __ that she knew best, she wasn't complacent about being prepared. Afraid she would __ the night of the concert, she practiced the song over and over. 3-4. The __ of

    asked on February 20, 2013
  36. Chemistry

    the type of reaction in a voltaic cell is best described as 1.spontaneous oxidation reaction only 2.nonspontaneous oxidation reaction only 3.spontaneous oxidation-reduction reaction 4.nonspontaneous oxidation-reduction reaction i know its spontaneous, but

    asked on March 27, 2011
  37. Eco

    When Joe started his job at the laundromat 5 years ago, his wage was $5.50 an hour. Today his wage is $8.50 an hour. If Joe started his job in the base year, and his real wage is the same as when he started, what is the Consumer Price Index today?

    asked on October 31, 2017
  38. physics

    A ball is thrown straight upward and returns to the thrower's hand after 2.00 s in the air. A second ball thrown at an angle of 40.0° with the horizontal reaches the same maximum height as the first ball. (a) At what speed was the first ball thrown? m/s

    asked on February 4, 2016
  39. Chemistry

    what is the percent by mass of oxygen in propanal, CH3CH2CHO? the answer is 27.6 %. but i need to know why, please help !

    asked on February 2, 2011
  40. math

    At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 21 knots and ship B is sailing north at 15 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per

    asked on July 9, 2011
  41. College Chemistry

    Consider the following reaction that occurs when natural gas is burned. CH4(g) + 2O2(g) ¨ CO2(g) + 2H2O(g) How many moles of water are produced when 6.2 mol of methane are burned? Assume that there is more than enough oxygen present.

    asked on March 26, 2012
  42. math

    The cost of a telephone call is $0.75 + $0.25 times the number of minutes. Write an algebraic expression that models the cost of a telephone call that lasts t minutes. i got C= 0.75 + 0.25t am i correct? pls help if im not :( and show me how u got the

    asked on October 1, 2013
  43. Math Algebra

    TechWiz Electronics makes a profit of $35 for each MP3 player sold and $18 for each DVD player sold. Last week, TechWiz sold a combined total of 130 MP3 and DVD players. Let x be the number of MP3 players TechWiz sold last week. Write an expression for the

    asked on November 2, 2015
  44. Math

    Recall that the equation for the horizontal distance h in feet of a projectile with initial velocity v0 and initial angle theta is given by h=v0^2/16 sin theta cos theta . a. Assume the initial velocity is 60 ft/second. What initial angle will you need to

    asked on December 6, 2013
  45. Math

    Worldwide annual sales of all cellphones were approximately −10p + 1,600 million phones when the wholesale price was $p. At what wholesale price should cellphones have been sold to maximize annual revenue?

    asked on November 2, 2014
  46. Chemistry

    A weather balloon with a volume of 3.86934 L is released from Earth’s surface at sea level.What volume will the balloon occupy at an altitude of 20.0 km, where the air pressure is 10 kPa? Answer in units of L

    asked on March 2, 2014
  47. Chemistry

    A portable electric water heater transfers 255 watts (W of power to 5.5 L of water, where 1 W=1J/s.How much time (in minutes) will it take for the water heater to heat the 5.5 L of water from 27∘C to 49∘C? (Assume that the water has a density of 1.0

    asked on September 12, 2014
  48. Chemistry

    Energy, q, w, Enthalpy, and StoichiometrySource(s): Consider the combustion of liquid methanol, CH3OH (l). CH3OH (l) +3/2O2 (g) = CO2 (g) + 2H2O(l) H = -726.5 kJ Part A: What is the enthalpy change for the reverse reaction? Express your answer using four

    asked on June 28, 2011
  49. science

    which is the largest digestive organ in the earthworm - how does its size make it well suited for its function? Compare the sizes of the earthworms digestive organs? There is a good picture of Earhtworm anatomy at the link below. You will see intestine and

    asked on March 14, 2007

    Determine if HNO3 can dissolve in the following metal: 1) Write a balanced chemical reaction showing how the 2.09g Cu dissolves in HNO3. I had put down: Cu(s) + 4HNO3(aq) ——> Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l) but it's wrong. 2) Determine the minimum

    asked on March 31, 2013
  51. math

    At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 21 knots and ship B is sailing north at 15 knots. How fast (in knots) is the distance between the ships changing at 4 PM? (Note: 1 knot is a speed of 1 nautical mile per

    asked on July 9, 2011
  52. Chemistry

    How much heat, in kilojoules, is associated with the production of 273kg of slaked lime, Ca(OH)2? CaO(s)+H2O(l)-->Ca(OH)2(s) delta H=-65.2kJ

    asked on November 4, 2010
  53. chemistry

    how many moles of oxygen atoms does 1.2x10^25 diphosphorus pentoxide molecules have? hwo many oxygen atoms are in 1.25 mol sulphur trioxide? i don't understand these

    asked on December 4, 2008
  54. physics

    A force of 5.00 N to the left causes a 1.35 kg book to have a net acceleration of 0.76 m/s2 to the left. What is the frictional force acting on the book?

    asked on October 30, 2010
  55. Chem Help!

    I really need help for my homework on how to write the balanced equation for the following reactions. 1) Sodium reacts with iron(lll)oxide to produce sodium oxide and iron. Type of reaction: Balanced Equation: 2) Hydrogen bromide forms from hydrogen and

    asked on April 8, 2008
  56. Chemistry

    If 4.0 L of a 4.8 M SrCl2 solution is diluted to 50 L , what is the molarity of the diluted solution?

    asked on November 1, 2010
  57. biology

    Explain how a scientist would use DNA or protien sequences taken from three different organisms to create a cladogram?

    asked on December 17, 2014
  58. math

    One pump can empty a pool in 5 days, whereas a second pump can empty the pool in 7 days. How long will it take the two pumps, working together, to empty the pool?

    asked on August 2, 2011
  59. phsyics

    A young girl sits at the edge of a dock by the bay, dipping her feet in the water. At the instant shown in the figure , she holds her lower leg stationary with her quadriceps muscle at an angle of 39 degree with respect to the horizontal. Use the

    asked on December 16, 2010
  60. physics

    При 0° С молекулы кислорода имеют среднюю скорость 460 м/с. Какова при этой температуре средняя скорость молекул азота? At 0 ° C, oxygen molecules have an

    asked on May 29, 2011
  61. reading

    Fill in the blank 1-2. Although Jenny chose the songs from her __ that she knew best, she wasn't complacent about being prepared. Afraid she would __ the night of the concert, she practiced the songs over and over. 3-4. The __ of the lecture was that

    asked on February 20, 2013
  62. physics--pressure

    how high would the atmosphere extend if it were of uniform density throughout, equal to half the present density at sea level?

    asked on March 22, 2009
  63. Algebra

    A scuba diver is positioned at-30 feet. How many feet will she have to rise to change her position to -12 feet?

    asked on May 8, 2016
  64. Algebra

    The force needed to keep a car from skidding on a curve varies inversely as the radius of the curve and jointly as the weight of the car and the square of the car's speed.Suppose that 400 pounds of force keeps a 1600-pound car from skidding on a curve of

    asked on March 11, 2016
  65. Living environment

    1.All of Earth's water, land, and atmosphere within which life exists is known as a population b. an ecosystem c.the biosphere d. a biotic community IS THE ANSWER C

    asked on January 3, 2012
  66. social studies

    the word citizenship most closely means?

    asked on October 21, 2015
  67. lea

    book title of the watsons go to birmingham 1963

    asked on December 5, 2014
  68. Chem H.W. Help!

    If You transfer a sample of a gas at 17 °C from a volume of 5.67 L and 1.10 atm to a container at 37 °C that has a pressure of 1.10 atm. What is the new volume of the gas?

    asked on May 5, 2008
  69. physics

    A box with a volume V = 0.03 m^3 lies at the bottom of a lake whose water has a density of 103 kg/m^3. (a) How much force is required to lift the box, if the mass of the box is 100 kg? (b) How much force is required to lift the box, if the mass of the box

    asked on November 27, 2012
  70. math

    Workers who manufacture shirts are sometimes paid based on the number of shirts they produce. Compute Lyle's gross pay if she made 380 shirts. The rate per shirt is given by the differential piecework schedule below: Pay Level Pay Level Items Produced Rate

    asked on September 17, 2013
  71. Physics

    A 0.165-kg ball, moving in the positive direction at 10 m/s, is acted on by the impulse shown in the graph below. What is the ball's speed at 4.0 s?

    asked on November 30, 2011
  72. chemistry

    VSEPR theory predicts that the geometry of AsH3 molecule is which of the following. linear trigonal planar trigonal pyramidal tetrahedral please explain the correct answer

    asked on February 23, 2014
  73. Chemistry

    Consider the combustion of liquid methanol, CH3OH (l) CH3OH (l) +3/2O2 (g) = CO2 (g) + 2H2O(l) H = -726.5 kJ What is for the reaction represented by this equation? Express your answer using four significant figures

    asked on June 28, 2011
  74. Calculus

    A truck gets 377/x mpg when driven at a constant speed of x mph (between 25 and 75 mph). If the price of fuel is $1 per gallon and the driver is paid $8 per hour, at what speed between 25 and 75 mph is it most economical to drive? (Give your answer correct

    asked on November 4, 2011
  75. Physics

    As soon as a traffic light turns green, a car speeds up from rest to 50.0 mi/h with a constant acceleration of 8.10 mi/h·s. In the adjoining bike lane, a cyclist speeds up from rest to 20.0 mi/h with a constant acceleration of 13.0 mi/h·s. Each vehicle

    asked on April 14, 2010
  76. College Physics

    A tiny 0.60g ball carries a charge of magnitude f 8.0uC. It is suspended by a thread in a downward 300 N/C electric field. What is the tension in the thread if the charge on the ball is negative? - Positive?

    asked on January 26, 2010
  77. Chemistry

    three separate questions 1. An empty graduated cylinder weighs 82.450 g. When filled to 50.0 mL, with an unknown liquid it weighs 110.810 g. What is the density of the unknown liquid? 2. It is valuable to know that 1 milliliter (mL) equals 1 cubic

    asked on February 11, 2014

    On vacation, your 1400-kg car pulls a 520-kg trailer away from a stoplight with an acceleration of 2.00 m/s2 . A: What is the net force exerted by the car on the trailer? Assume that the positive x axis is directed toward the direction of motion. F = N

    asked on February 25, 2017
  79. physics

    To determine the force acting on each mass its was assumed that g=9.80 m/sec2. The value of g at the place where the experiment is performed may be slightly different from value . State what effect it would have on the percentage error calculated for the

    asked on September 28, 2011
  80. biology

    Explain how a scientist would use DNA or protien sequences taken from three different organisms to create a cladogram

    asked on December 17, 2014
  81. chemistry

    Write a balanced equation for the neutralization of each of the following. Express your answer as a chemical equation. Identify all of the phases in your answer. Part A: H3PO4(aq) and NaOH(aq) Part B: Hl(aq) and LiOH(aq) Part C: HNO3(aq) and Ca(OH)2(aq

    asked on April 1, 2012
  82. Physics--Pressure

    a house at the bottom of a hill is fed by a full tank of water 5m deep and connected to the house by a pipe that is 110m long at an angle of 58 from the horizontal. a) determine the water gauge pressure at the house b) how high could the water shoot if it

    asked on March 22, 2009
  83. chemistry

    Diborane (B2H6) is a highly reactive boron hydride, which was once considered as a possible rocket fuel for the U.S. space program. Calculate ∆H for the synthesis of diborane from its elements, according to the equation 2 B (s) + 3 H2 (g) → B2H6 (g)

    asked on January 25, 2015
  84. Statistics

    Many dairy cows now receive injections of BST, a hormone intended to spur greater milk production. A group of 53 Jersey cows increased average milk production from 43 to 52 pounds per day, with a standard deviation of 4.8 lbs. Is this evidence that the

    asked on November 21, 2013
  85. Math

    I can't make this work. Please help? Insert parentheses when necessary to make the number sentence true. 5-3x4/6+4=-9 Thank you!

    asked on March 7, 2010
  86. advanced functions

    =the height in metres of a weather ballon above the ground after t seconds can be modelled by the function h(t)=-2t^3+3t^2+149, for 0

    asked on February 20, 2014
  87. management science

    Kim Davis has decided to purchase a cellular phone, but she is unsure about which rate plan to select. The "regular" plan charges a fixed fee of $55 per month for 1,000 minutes of airtime plus $0.33 per minute for any time over 1,000 minutes. The

    asked on October 27, 2012
  88. Chemistry

    Consider the following equilibrium: NH4Cl(s)--->NH3(g) + HCl(g) Suppose a vessel containing NH4Cl(s), NH3(g) and HCl(g) is at equilibrium. If the volume of vessel is instantaneously doubled while keeping the temp constant when a new equilibrium is reacted,

    asked on February 10, 2013
  89. chemistry

    calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n=5 to n=1 how do I do this?

    asked on November 21, 2010
  90. Life Span Development

    As Selena and her friends are walking home after school they approach a corner store and see bags of candy and snacks on open shelves outside the front door. A young clerk is also outside waiting for customers. As they get closer, they see the clerk go

    asked on January 4, 2016
  91. physics

    A falling stone accelerates at a constant rate of 10ms^2. It is dropped from rest down a deep well and 3s later a splash is heard as it hits the water below.(1) How fast will it be moving as it hits the water? (2)What will be its average speed over the

    asked on October 27, 2015
  92. economics

    How to calculate item weight of an item

    asked on September 14, 2014
  93. Social studies

    In what present day countries can the sites of your civilizations be found? Help asap! I will thank you so much if you answer this question before 5:00 pm tonight! Thank you! Have a terrific day/thanksgiving break!

    asked on November 18, 2018
  94. English

    Read the following line from "Not Waving but Drowning." "Poor chap, he always loved larking And now he's dead" a. detached b. pleased c. objective d. critical NOT WAVING BUT DROWNING Stevie Smith Nobody heard him, the dead man, But still he lay moaning: I

    asked on October 26, 2017
  95. Chemistry

    At a certain temperature, the equilibrium constant, Kc, for this reaction is 53.3. H2(g)+I2(g) 2HI(g) Kc= 53.3 At this temperature, 0.300 mol of H2 and 0.300 mol of I2 were placed in a 1.00-L container to react. What concentration of HI is present at

    asked on March 8, 2013
  96. Chemistry- moles

    How do I determine the number of hydrogen atoms in .0885 mol Tetracarbon decahydrogen?

    asked on October 1, 2013
  97. conflict and negotiation

    A fellow supervisor usually argues about an issue before arriving at a decision. Knowing this a typical of this person's behavior. If you were the boss how would handle your next confrontation?

    asked on August 28, 2011
  98. Paine College

    Morningside Nursing Home, a not-for-profit corporation, is estimating its corporate cost of capital. Its tax-exempt debt currently requries an interst rate of 6.2 percent and its target capital structure calls for 60 percent debt fianancing and 40 percent

    asked on August 10, 2010
  99. statistics

    A person who has served three consecutive terms of four yrs shall be eligible for appointment, nomination for or election to the office of council-member no sooner than for a term beginning eight years after completion of that council member's third

    asked on June 4, 2012
  100. Chemistry

    If 80.0 grams of methane were reacted with 368 grams of oxygen, how many grams of water would be formed (find limiter first).

    asked on April 3, 2011


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