Most popular questions and responses by Melanie
  1. chemistry

    Consider the following reaction: I2(g) + Cl2(g) 2ICl(g) o Kp = 81.9 at 25 C. Calculate ∆Grxn for the reaction at 25 C under each of the following conditions: a Standard conditions. b At equilibrium. c PICl = 2.55 atm; PI2 = 0.325 atm; PCl2 = 0.221 atm.

    asked on April 18, 2013
  2. English, Language Arts

    Please check my answers 1. In the play Crossroads: A Sad Vaudeville, the use of stage directions better helps the reader to observe the movements of a character. envision inside the mind of a character. understand how a character responds to a certain

    asked on October 9, 2016
  3. Statistics

    A major department store chain is interested in estimating the average amount its credit card customers spent on their first visit to the chain's new store in the mall. Fifteen credit card accounts were randomly sampled and analyzed with the following

    asked on November 14, 2012
  4. math

    rearrange A = 2 pi r (r+h) to make h the subject (cylinder)

    asked on October 28, 2016
  5. History

    Which features of the Roman government limited individual power? Select all that apply. A. The Senate was the most powerful branch of government. B. The assemblies were a form of direct democracy. C. The two consuls could veto each other's actions.***** D.

    asked on December 5, 2018
  6. history

    What is the main reason that Rome was built on hills? A. The hills had fertile farmland. B. The hills provided a natural defense.*** C. The hills were near a port. D. The hills were densely populated.

    asked on December 8, 2018
  7. History Check My Answer!

    Hey I just have 1 question. What event caused four additional Southern states to secede from the Union? The U.S. accepted West Virginia as a state. The South fired on Fort Sumter. Lincoln declared the Emancipation Proclamation. ****** Lincoln raised an

    asked on February 25, 2016
  8. history

    How did geography affect the development of independent city-states? Select all that apply. A. The mountains isolated the city-states. B. The sea separated the city-states. C. The coastal areas were not fertile. D. The plains were barriers. E. The climate

    asked on November 29, 2018
  9. Physics

    A sound wave in a solid has a frequency of 15.0 kHz and a wavelength of 0.333 m. What would be the wave speed, and how much faster is this speed than the speed of sound in air?

    asked on March 4, 2014
  10. math

    There is a diagram of a running track. The track is made up of two straights and two semicircles. The radius of each semicircle is 35 meters. The length of the outer perimeter of the entire running track is 400 meters. Find the length of one of the

    asked on May 19, 2016
  11. Algebra

    Myra uses an inverse variation function to model the data for the ordered pairs below. (2, 30), (3, 20), (4, 15), (5, 12), (6, 10) Which statement best explains whether an inverse variation function is the best model for the data? An inverse function is

    asked on July 7, 2014
  12. math

    a baseball club has 18 players for every team, with the exception of four teams that have 19 playes each. is the number of players proportional to the number of teams?

    asked on January 2, 2013
  13. Math

    1. What are the next two terms of the following sequence? -3, 1, 5, 9... 2. What are the next two terms of the following sequence? -2, 4, -8, 16... 3. What is the common difference of the following arithmetic sequence? 13, -7, -27, -47... 4. What is the

    asked on January 15, 2011
  14. Intro to computers 1

    Which logging category does not appear in Event Viewer by default? A. Application B. System C. Volume D. Security

    asked on June 10, 2016
  15. business math

    A local Barnes and Noble paid a $79.44 net price for each calculus textbook. The publisher offered a 20% trade discount. What was the publisher’s list price?

    asked on February 24, 2015
  16. Physics

    A photon having wavelength λ scatters off a free electron at A (see figure below), producing a second photon having wavelength λ'. This photon then scatters off another free electron at B, producing a third photon having wavelength λ'' and moving in a

    asked on June 17, 2015
  17. math

    at the beginning of the summer, conan had $180 in the bank. each week he deposits another $64 that he earns mowing lawns. is his account balance proportional to the number of week since he started mowing lawns?

    asked on January 2, 2013
  18. history

    someone PLZ HELP ME! Why did the ancient Greeks use conquest, colonization, and trade? A. to build a strong and unified empire B. to stay isolated from other empires C. to establish a uniform currency D. to get the resources they needed to survive is it d

    asked on November 29, 2018
  19. Chemistry

    1. How many moles of ammonia NH3 are produced when 0.45 moles of nitrogen N2 reacts? N2 + 3H2 yields 2NH3 2. How many mililiters of water will be produced when 2.05 g of hydrogen reacts? The density of water is 1.00 g/mL ? 2H2 + O2 yields 2H2O 3. What is

    asked on March 18, 2015
  20. Physics

    An archer wishes to shoot an arrow at a target at eye level a distance of 45.0 m away. If the initial speed imparted to the arrow is 68.2 m/s, what angle should the arrow make with the horizontal as it is being shot?

    asked on October 27, 2012
  21. Literature

    Since the time of the play's first performance, the props and set have been designed to be minimal so that________. the play can be performed in outdoor as well as indoor locations the play becomes more appealing for younger audiences ***my answer actors

    asked on May 5, 2017
  22. History

    so in the world history book for 8th grade it says that the roman republic had it's own constitution, which was a written set of guidelines we can say as laws. but it was not ratified, as in it was not approved of. I know to make something a constitution

    asked on December 5, 2018
  23. Chemistry

    How much CuSO4.5H20 would you need to prepare 6 grams of copper ammine complex, [Cu(NH3)]SO4.H20? There is only 1 ammonia molecule in the copper ammine complex. please answer asap, thanks!

    asked on March 27, 2012
  24. Algebra

    Jordan uses a linear equation to model the data in a table. Which reasoning might Jordan have used in the decision to model the data with a linear equation? The products of corresponding x- and y-values are equal. The ratios of consecutive y-values are

    asked on July 7, 2014
  25. History

    Why did the Roman republic use separation of powers in government? A. so the Senate could be the most powerful branch B. so no one branch would get too powerful C. so the magistrates could veto the assemblies D. so the plebeians could join the race of

    asked on December 12, 2018
  26. Physics

    Stephanie serves a volleyball from a height of 0.78 m and gives it an initial velocity of +7.7 m/s straight up. How high will the volleyball go? The acceleration of gravity is 9.81 m/s^2. How long will it take the ball to reach its maximum height?

    asked on January 28, 2013
  27. history

    Please check my answers! Characteristics women can vote United States representative democracy: United States government included separation of powers: United States government structured by a constitution: United States part of government like an

    asked on December 4, 2018
  28. history

    Which of the following describes life in Sparta for children? A. Young boys got a well-rounded education. B. Young boys were taught to obey orders. C. Girls stayed in the home with their moms. D. Boys were expected to participate in government. is it b plz

    asked on November 29, 2018
  29. math

    can someone help me like ASAP 1. 13x - 7 = 136 A. 11 B. 15******* C. 8 D. 9 Am I correct?

    asked on November 29, 2018
  30. history

    someone plz help me Drag the geographical features that helped Rome flourish to the box. mountains plateaus plains rivers desert i think river mountains and plains am i right

    asked on December 3, 2018
  31. Chemistry

    only one of each of the following pairs of reactants undergoes a reaction. Complete and balance the equation for the reaction that occurs. NaCl (aq) + BaCl2 (aq) --> Na2SO4 (aq) + BaCl2 (aq) --> NO3^- (aq) + OH^- (aq)+ Al (s) --> CO3^2- (aq) + OH^- (aq)

    asked on April 15, 2013
  32. history

    Which specific problem led Rome to change from a monarchy to a republic?

    asked on December 3, 2018
  33. ART

    What is one characteristic of this student's work? ( woman's head by Iris v.) 1.creation of 3-D art 2.creation of cubist art 3.exact representation of human property 4.use of cool colors only

    asked on December 3, 2018
  34. chemistry

    If you burn 38.9 g of hydrogen and produce 348 g of water, how much oxygen is reacted?

    asked on February 6, 2012
  35. Geometry

    Given that R is between S and T, find each missing measure. RS=6, TR=4.5, TS=?

    asked on September 8, 2014
  36. art

    1.what is one characteristic on this student work a. creation of 3-D art b. creation of cubist art c. exact representation of human proportion**** 2. to create a portfolio of work this artist would do all the following except? a .include more drawings of

    asked on December 3, 2018
  37. Chemistry

    A solution is 40% acetic acid by mass. The density of this solution is 1.049 g/mL. Calculate the mass of pure acetic acid in 460 mL of this solution at 20 C. Answer in units of g.

    asked on August 29, 2016
  38. history

    I'M confused can someone please explain this to me and help me figure out the answer? How did Greek scientists change the way people viewed and understood the natural world around them? How did common Greeks explain natural events prior to scientific

    asked on November 29, 2018
  39. history

    Which is the most important lesson that can be learned from the Persian Wars? A. That Athens alone could have beaten Persia. B. That Persia was too powerful to ever defeat. C. That the Greek city-states should stay independent at all times. D. That a

    asked on November 29, 2018
  40. history

    URGENT QUESTION PLZ ANSWER ASAP How did common Greeks explain natural events prior to scientific explanations?

    asked on December 3, 2018
  41. Math

    1. 7r - 7 = 2r + 18 1 .r= -5**** 2. r= 5 3. r= 2.2 4. r= 1.2 2. 2x + 12 = 18 - x 1. x= 3 2. x= 10 3. x= 6**** 4. x= 2 3. 8x - 3 = 15x + 18 1. x = -3 2. x= 3**** 3. x= 2.1 4. x= .9 4. 6y- 6 = 4y + 16 1. y = 2.2 2. y = -2.2 3. y= 11 4. y = 5**** Am i right?

    asked on December 5, 2018
  42. trig

    earth is 149 600 000 km from the sun. this distance is equal to 1 A.U (astronomical unit). Mars is seen form earth to make an angle of 68degrees with the sun. a) draw a diagram and label b)how far are earth and mars c) do you think the distance between

    asked on May 27, 2014
  43. chemistry

    C3H6O + 4O2 --> 3CO2(g) + 3H2O(g) deltaH= -1790kJ the density of C3H6O is 0.79g/mL. HOw much heat is released by the combustion of 150mL of acetone?

    asked on November 3, 2015
  44. Pen Foster

    checking my answers in Introduction to Allied Health anyone have that one?

    asked on August 12, 2011
  45. Math

    1) What is the slope of a line that is parallel to y = 2? 2) What is the slope of a line that is perpendicular to y = 2? 3) What is the slope of a line that is parallel to x = -4? 4) What is the slope of a line that is perpendicular to x = -4? I don't get

    asked on February 16, 2011
  46. Math

    The domain of t(x) = -3.8x - 4.2 is {-3, -1.4, 0, 8}. What is the range?

    asked on January 12, 2011
  47. math

    A partial payment is made on the date(s) indicated. Use the United States Rule to determine the balance due on the note at the date of maturity. (The Effective Date is the date the note was written.) Assume the year is not a leap year. P $1900, R 6%,

    asked on June 13, 2011
  48. algebra

    Suppose a sample of Cesium-137 with initial mass of 200 grams decays to a mass of 160 grams voer the course of 10 years. Find the half-life of Cesium-137 (Round to the nearest year) How much Cesium-137 is left in the sample after 60 years? Round to the

    asked on July 30, 2011
  49. Algebra

    Hey people, i need some help i tried to do this but i don't know what im doing help me out here please... 1.x/4 +1 = -5 a. -2**** b. 16 c. 4 d. -24 2. 6x + 29 = 5 a. -4** b. -18 c. 204 d. -144 3. combine like terms. -21a +16a 1. -5a**** 2. 5a 3. 37a 4.

    asked on December 4, 2018
  50. math

    The chart below (Monday:2,600, Tuesday: 3,100, Wednesday: 2,800 and Thursday: 3,200)displays Jim's sales for the first four days of his work week. Jim's boss told him that he would get a promotion if his mean sales for Monday through Friday were at or

    asked on June 1, 2018
  51. Math

    You earn $7.25 per hour babysitting. Write and solve an inequality to find how many full hours you must work to earn at least $200

    asked on January 11, 2011
  52. math

    on a boat tour there are half as many children there are as adults. ther are 40 people on the tour how many children are there

    asked on March 3, 2014
  53. Geometry. Please help.

    1) Two angles are complementary. The measure of one angle is 21 more than twice the measure of the other angle. Find the measure of the angles. 2) If a supplement of an angle has a measure 78 less than the measure of the angle, what are the measures of the

    asked on August 30, 2011
  54. science

    Breanna and Kevin learned that fossil fuels, such as coal and oil, release energy when they are burned. Breanna believes this energy comes from the ancient plants and animals that formed fossil fuels, but Kevin says the power in fossil fuels comes from the

    asked on June 3, 2018
  55. Chemistry

    At normal temperature and pressure, air has a density of 0.001184 g/mL. What is the mass of air in a room that is 3.93 m by 2.28 m by 2.25 m?

    asked on August 29, 2016
  56. Math

    What is 10x + 2y - 10 = 0 in slope intercept form ? and can you also explain how you got the answer cause I'm not really sure how to convert that into slope intercept (y = mx + b) m = slope and b = y intercept

    asked on February 23, 2011
  57. Biology

    What is the target organs for Luteinizing Hormone and the Follicle Stimulating Hormone?

    asked on April 29, 2010
  58. physics

    A window washer drops a brush from a scaf- fold on a tall office building. What is the speed of the falling brush after 2.7 s? (Neglect drag forces.) The acceleration due to gravity is 9.8 m/s2 . Answer in units of m/s How far has it fallen in that time?

    asked on September 20, 2012
  59. chemisty

    give the conjugate base for HNO2

    asked on November 29, 2011
  60. chemistry

    At room temperature, 20° C, water (H2O) is a liquid and oxygen (O2) is a gas. Based on kinetic molecular theory, which answer best explains the states of the two fluids?

    asked on April 18, 2011
  61. Chemistry

    What happens if a student adds distilled water to a flask before starting the titration?

    asked on March 29, 2011
  62. Statistics: 82% Confidence Interval

    I'm having some difficulty with this problem: Over the last 15 Major League Baseball seasons, the mean # of strikeouts by the American League leader is 258.5. Assuming that the # of strikeouts by the league leader is normally distributed & the standard

    asked on June 22, 2008
  63. st mags

    what are shallow places in the ocean called

    asked on September 23, 2010
  64. Algebra

    Solve the inequality : 6/-5 < -18 i know it's false but it as some answers like 1. G < -23, 2. G > -90, 3. G >90, 4. G

    asked on December 10, 2018
  65. English

    I need 3 themes and 4 quotes per theme for the book the bluest eye by toni morrison. i have one theme completely done. my other theme is sexual initiation and abuse, but i have no quotes for it. and i still need one more theme. help?

    asked on March 14, 2010
  66. Jar Marbles

    A jar contains 5 red marbles, numbered 1 to 5, and 12 blue marbles numbered 1 to 12. a) A marble is chosen at random. If you're told the marble is red, what is the probability that it has the number 3 on it? b) The first marble is replaced, and another

    asked on October 9, 2016
  67. chemistry

    If you burn 38.9 g of hydrogen and produce 348 g of water, how much oxygen is reacted?

    asked on February 6, 2012
  68. Oceanography

    If the chlorinity of a sample of seawater is 5.5 0/00, what is the salinity in parts per thousand? Round your answer to the nearest tenths place. Basically, if ANYONE...knows anything about how to do this, or knows the answer or any information that could

    asked on September 24, 2008
  69. chemistry

    Propane is used in BBQs and burns according to the following equation: C3H8 + 5O2 -> 3CO2 + 4H2O. If 2.2 moles of carbon dioxide are produced, how many moles of oxygen gas reacted?

    asked on February 3, 2016
  70. math

    A shopper uses a department store gift card to pay for 3 sweaters priced at $27 each. What integer can be used to show the amount of change?

    asked on September 27, 2015
  71. Physics

    An object is placed 11 cm in front of a convex mirror of focal length 4 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.

    asked on November 27, 2012
  72. Chemistry

    Assuming complete dissociation of the solute, how many grams of KNO_3 must be added to 275mL of water to produce a solution that freezes at -14.5C? The freezing point for pure water is 0.0 C and K_f is equal to 1.86 C. Delta T= Kf*m*i i=2 m=3.90 solvent

    asked on February 24, 2010
  73. Math

    1. Doug earns $10.50 per hour at a restaurant. On Friday, he's been 1 3/4 hours cleaning, 2 1/3 hours doing paperwork, and one 512 hours serving customers . What were dougs earning? 6. Salid bought 35 feet of window trim at a hardware store. The trim it

    asked on January 31, 2016
  74. math

    A drawer contains 4 red socks, 3 white socks, and 3 blue socks. without looking, you select a sock at random, replace it and seect a sond sock at random. what is the probablity that the first sock is blue and the second sock is red?

    asked on May 21, 2012
  75. physics

    A string under a tension of 43 N is used to whirl a rock in a horizontal circle of radius 3.3 m at a speed of 26.46 m/s. The string is pulled in, and the speed of the rock increases. When the string is 0.635 m long and the speed of the rock is 80.5 m/s,

    asked on December 19, 2011
  76. Chemistry

    How many grams are in 8.2x10 to the power of 22 molecules of Fe2O3?

    asked on June 15, 2011
  77. Chemistry

    How do you determine what ionic substance has more exothermic lattice energy? for example if you compare NaCl and KCl???

    asked on November 4, 2008
  78. Math

    Write the number in two other forms two hundred thirty four thousand one hundred sixty four

    asked on October 17, 2017
  79. Physics

    A wheel is rotating at a rate of 2.5 revolutions every 3.6 s. Through what angle, in radians, does the wheel rotate in 1.0 s?

    asked on January 21, 2016
  80. physics101 please

    a 12,000 kg truck is moving right at 22 m/s collides with and sticks to a 1200 kg car moving to the right at 16 m/s. With what speed do the two vehicles move after the collision and in what direction?

    asked on October 19, 2015
  81. math

    Rick has a collection of 6 video games. He lets his best friend borrow: of his video game collection. Write two equivalent to this number Explain how you came fractions up with the fractions.

    asked on March 2, 2015
  82. Word Problems

    The manager has one type of coffee that sells for $5 per pound and another type that sells for $11 per pound. The manager wishes to mix 90 pounds of the $11 coffee to get a mixture that will sell for $10 per pound. How many pounds of $5 coffee should be

    asked on March 7, 2011
  83. math 5th grade

    need to round 21,079,000 to nearest 100 thousand

    asked on August 27, 2009
  84. geometry

    How do you find the perimeter of a second polygon given just the scale factor of both polygons and the perimeter of the larger polygon? The problem is Two similar polygons have a scale factor of 3:5. The perimeter of the large polygon is 120 feet. Find the

    asked on February 4, 2012
  85. Empirical Probability

    Explain how empirical probability can be used to determine whether a die is “loaded” (not a fair die).

    asked on May 30, 2011
  86. Math

    Describe a pattern in the sequence 4, 6.5, 9, 11.5 & find the next two terms of the difference.

    asked on January 12, 2011
  87. chemistry

    146 mL of wet H2 gas is collected over water at 29.0 degrees celsius and room pressure of 750 torr. give the volume of the dry H2 gas collected at STP, give the mass of the dry H2 collected, and give the volume of the dry H2 at room conditions and the

    asked on December 8, 2010
  88. Physics

    What is the average linear speed of Mercury about the Sun? (The distance from the Sun to Mercury is 5.80 1010 meters. The orbital period around the Sun is 88 days.)

    asked on February 1, 2016
  89. physical science

    what is the freezing point depression when 153g of bromine is added to 1000g of benzene?

    asked on August 18, 2011
  90. Stats

    A manufacturer of golf equipment wishes to estimate the number of left-handed golfers. How large a sample is needed in order to be 90% confident that the sample proportion will not differ from the true proportion by more than 2%? A previous study indicates

    asked on November 28, 2009
  91. art

    What exactly are modern and contemporary art? For school, I have to paint a piture that relates to a certain part of speech as well as a certain type of art era/period. I'm almost finished, so now i just want to know how to EXPRESS modern or maybe even

    asked on November 21, 2008
  92. Chemistry

    Hi can someone please help with this question, or atlest direct me in the right direction. Please and thank you. The initial rate of reaction H2O2(aq) --> H2O (l) + 1/2 O2(g) is found to be1.7*10^-3 M/s . Assume that this rate holds for 2 minutes. Start

    asked on November 20, 2008
  93. Statistics

    When testing H0: σ12 = σ22 vs. Ha: σ12 ≠ σ22 two random samples of sizes 10 and 8, respectively, are used. The calculated value of the test statistic is found to be equal to 2.22. Which of the following statements is true? a. H0 must be rejected at

    asked on November 14, 2012
  94. Physics

    1) A physics book is moved once around the perimeter of a table of dimensions 1 m by 3 m. What is the distance traveled? 2) A window washer drops a brush from a scaf- fold on a tall office building. What is the speed of the falling brush after 2.7 s?

    asked on September 20, 2012
  95. College Algebra

    A farmer has 100 yeards of fencing with which to enclose two adjacent rectangular pens both bordering a river. The farmer does not need to fence the side with the river. What should the dimensions of the two pens together (a rectangle) be in order to yield

    asked on July 15, 2011
  96. Math

    solve each system 1) 3x + y = 6 2x + 3y = 13 2) 2x + 5y - 6 = 0 -2x + y - 2 = 0 3) x + 3y = 6 4x - 5y = 7

    asked on February 22, 2011
  97. Physics

    A 325 kg boat is sailing 15.0 degrees north of east at a speed of 2.00 m/s. Thirty seconds later, it is sailing 35.0 degrees north of east at a speed of 4.00 m/s. During this time three forces act on the boat: a 31.0 N force directed 15.0 degrees north of

    asked on October 14, 2010
  98. Chemistry

    A solution of H2SO4 was electrolyzed using the inert platinum electrodes. A) Write the balanced half-reactions for the anode and cathode in this cell. B) How many coulombs passed through the cell in 90 minutes at 8.0 amperes? C) How many moles of electrons

    asked on January 6, 2013
  99. math

    What is a function rule for the perimeter P of a building with a rectangular base if the width w is two times the length l?

    asked on January 4, 2011
  100. math

    Bert is planning to open a savings account that earns 1.6% simple interest yearly. He wants to earn exactly $240 in interest after 3 years. How much money should he deposit?

    asked on March 27, 2010


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