Popular questions and responses by whitney
  1. Chemistry

    The reaction of NO and O2 produces NO2. 2 NO(g) + O2(g) „_ 2 NO2(g) The reaction is second-order with respect to NO(g) and first-order with respect to O2(g). At a given temperature, the rate constant, k, equals 4.7 x 10^2 M^¡V2s^¡V1. What is the rate

    asked on February 18, 2015
  2. Chemistry

    How much would the boiling point of water increase if 4 mol of sugar were added to 1 kg of water (Kb=0.51C/(mol/kg)for water and i=1 for sugar)?

    asked on March 4, 2014
  3. Chem

    What is the oxidation half-reaction for Mg(s)+ZnCL2(aq)>MgCL2(aq)+Zn(s)?

    asked on February 27, 2014
  4. Chemistry

    what precipitate (if any) will form? Al(NO3)3 (aq) + Ba(OH)2 (aq)

    asked on March 2, 2008
  5. Physics

    W have three air carts (labeled #1, #2, and #3) on an air track. The carts are equipped with spring bumpers so that all collisions are elastic. The masses of the carts are m1 = 5m, m2 = 2m, and m3 = m. Initially, cart #1 is given a velocity to the right of

    asked on October 25, 2015
  6. chemistry

    the diameter of a helium atom is about 1*10^2pm.suppose that we could line up helium atoms side by side in contact with one another. aproximately how maney atoms would it take to make the distance from end to end 1cm ?

    asked on September 7, 2012
  7. Algebra 2

    The test scores for a math class are shown below. 81,84,82,93,81,85,95,89,86,94 What is the standard deviation of the data set? Roun your answer to the nearest tenth 4.9 5.5 5.3 5.1

    asked on May 19, 2014
  8. algebra

    1. Solve 3x – 19 = 2 Ax = -17 Bx = -17/3 Cx = 7 Dx = -51 Ex = 20 Fx = 18 2. Solve 4x + 12x = 62 + 4(11) Ax = 7 Bx = 5 Cx = 35 Dx = 64 Ex = 11 Fx = 7/2 3. Solve 8x – 7 = x + 10 Ano solution Bx = 1/3 Cx = 1/10 Dx = 3/7 Ex = 17/7 Fx = 17/9 4. Solve 4(5x

    asked on September 20, 2010
  9. Chemistry

    what mass of nitrogen gas is required to react completely with 2.79 of hydrogen gas to produce ammonia?

    asked on October 30, 2014
  10. Chemistry

    If 507 g FeCL2 were used up in the reaction FeCL2 + 2NaOH > Fe(OH)@(s) + 2NaCL, how many grams of Fe(OH)2 would be formed?

    asked on February 27, 2014
  11. Math

    Convert 2yd, 2ft, 5in. to centimeters. Convert 10yd,1ft, 7in. to meters. I tried it twice but still didn't get it right. Please help me out.

    asked on September 30, 2014
  12. Physics (2)

    If it takes 4.00 J of work to stretch a Hooke's Law spring 10.0 cm from its unstressed length, determine the extra work required to stretch it an additional 10.0 cm

    asked on October 13, 2011
  13. algebra

    please check my homework c1. Solve 3x – 19 = 2 Ax = -17 Bx = -17/3 Cx = 7 Dx = -51 Ex = 20 Fx = 18 b2. Solve 4x + 12x = 62 + 4(11) Ax = 7 Bx = 5 Cx = 35 Dx = 64 Ex = 11 Fx = 7/2 e3. Solve 8x – 7 = x + 10 Ano solution Bx = 1/3 Cx = 1/10 Dx = 3/7 Ex =

    asked on October 1, 2010
  14. English

    8. Name three specific "poet stereotypes" that Margaret Atwood discusses or hints at in her speech. 9. What were Margaret Atwood's very first poetry experiences? 10. What are your earliest memories of poetry? Were they similar to Margaret Atwood's first

    asked on May 10, 2011
  15. Math

    The height of a pop can is 15 cm and its shadow is 20 cm long. A carton of milk next to the can is 0.25 m tall. Determine the length of the carton's shadow, to one tenth of a centimeter. I did 100cm*0.25... but the answer is 33.3cm How did they get that?

    asked on October 6, 2014
  16. Quatitative Analysis

    What is the correct charge balance equation for an aqueous solution of MnCl2 that ionizes to Mn2 , Cl–, MnCl , and MnOH ? What is the correct mass balance equation for the same solution?

    asked on September 17, 2013
  17. HRM 240

    Final Project paper. how do i go about setting up my paper to make sure i discuss all of the things that are being asked of me for my final paper.

    asked on February 11, 2011
  18. math

    At lunch, 8 friends share 6 sandwiches equally. What fraction of a sandwich does each friend get.

    asked on June 1, 2016
  19. Math

    The centre of a doughnut is removed and formed to make a sphere of dough with diameter 2.5 cm. A batch of these spheres is to be covered in a sugar glaze. There is enough glaze to cover an area of 4710 cm^2. How many spheres can be glazed?

    asked on October 19, 2014
  20. Math

    A right pyramid has a surface area of 258 cm2. A right cone has a base radius of 4 cm. The cone and pyramid have equal surface areas. What is the height of the cone to the nearest tenth of a centimetre?

    asked on October 13, 2014
  21. Math

    Kevin and Rob are standing on opposite sides of Edmonton's River Valley. In order to see a boat on the river, Kevin has to look down 32°, and Rob has to look down 38°. The width of the valley is 750m, and the boat is exactly between Kevin and Rob. How

    asked on July 27, 2014
  22. poetry

    In this unit, you read William Wordsworth’s poems “Lines Composed a Few Miles Above Tintern Abbey,” “The World is Too Much with Us,” and “I Wandered Lonely as a Cloud.” How are these poems representative of the Romantic Period?

    asked on February 26, 2013
  23. Biology 1010

    Which of following is NOT characteristics of all fish? a.gills as respiratory organs b.two-chambered heart c.swim bladder for buoyancy organ d.skin with scales e.presence of jaws

    asked on April 18, 2012
  24. geometry

    If Quadrilateral QRST is a parallelogram, which is not necessarily true? a. Opposite angles are congruent. b. The diagonals bisect each other. c. Angles are four right angles. d. Consecutive angles are supplementary.

    asked on January 2, 2011
  25. chemistry

    use a combustion reaction of liquid ethanol( C2H5OH) an air as a source of work, assuming T=25 celcius, air pressure is 1 atm, and all products are gases with partial pressure of 10 atm each. How high can one lift a 1000 kg weight by burning 100 g of

    asked on November 7, 2010
  26. spanish

    Re-write the following sentences replacing the underlined direct object with a direct object pronoun. Remember, the direct object pronoun needs to be placed directly in front of the conjugated verb. The following is an example: Example: Sara come una

    asked on November 6, 2010
  27. math

    how do can i memorize all that multiplication

    asked on August 20, 2010
  28. physics

    a cliff diver falling at 9.8 m/s2 takes 1.5 seconds to hit the water. How high is the cliff?

    asked on April 18, 2010
  29. statistics

    Answer the question(s) based on the following situation: 150 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with center ì = 65 and standard deviation ó = 10.The third quartile of the scores

    asked on March 17, 2010
  30. college

    A tortoise can run with a speed of 0.10m/s and a hare can run 20 times as fast. In a race, they start at the same time, but the hare stops to rest for 2.0min. The tortoise wins by a shell (20cm). How long does the race take? What is the length of the race?

    asked on February 2, 2010
  31. Chemistry

    During your experiment, you are drive water from the hydrate MxXy*zH2O. You subsequently determine that your hydrate has six molecules of waters associated with each formula unit. However, the bottle the hydrate came from indicated a formula with only four

    asked on October 10, 2009
  32. Microeconomics

    PLEASE HELP..the table shows the number of labor hours required to produce a digital camera and bushel of wheat in China and S.Korea. China Digital cameras 100hrs China Wheat 5hrs S.Korea Digital cameras 90hrs S.Korea Wheat 3hrs The question is if each

    asked on September 21, 2009
  33. statistics

    For this assignment, use data from W1 Project. Data: Literature Review Social scientists have long been interested in the accuracy of eyewitness testimony. Several studies over the past few decades have demonstrated that eyewitnesses are not always

    asked on November 24, 2019
  34. Math

    What is the average of 12,43,37 and 40

    asked on July 12, 2017
  35. Chemistry

    For a certain reaction, the activation energy is 52.1 kJ/mole. By what ratio will the rate constant change if the temperature is decreased from 175C to 75C?

    asked on February 18, 2015
  36. Algebra2

    What is the common ratio of the geometric sequence whose second and fourth terms are 6 and 54, respectively?

    asked on July 24, 2014
  37. Science- Chemistry

    How do I figure these out? A solution of sodium thiosulfate, Na2S2O3, is 0.1365 M. 29.28 mL of this solution reacts with 39.79 mL of I2 solution. What is the molarity of the I2 solution? 2(Na2S2O3) + I2↔Na2S4O6 + 2(NaI) 16.77 mL of the I2 solution from

    asked on November 8, 2012
  38. Physics - 2

    A single bead can slide with negligible friction on a wire that is bent into a circular loop of radius 15.0 cm, as in Figure P6.68. The circle is always in a vertical plane and rotates steadily about its vertical diameter with (a) a period of 0.450 s. The

    asked on October 6, 2011
  39. Physics - 1

    An amusement park ride consists of a large vertical cylinder that spins about its axis fast enough that any person inside is held up against the wall when the floor drops away (Fig. P6.65). The coefficient of static friction between person and wall is μs,

    asked on October 6, 2011
  40. Physics

    A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 24 m/s west, and the total acceleration of the car is 2.5m/s^2 53 degrees north of west. Find the radial and tangential components of the acceleration of the car at

    asked on September 22, 2011
  41. Finance

    3. Your firm is considering buying a new machine that costs $200,000, is expected to generate $110,000 in new revenue each year and will cost $45,000 a year to operate. If your firm's marginal income tax rate is 35% what is the Net Cash Flow your firm will

    asked on February 23, 2011
  42. geometry

    Many younger children like to play a game similar to baseball called tee-ball. To accommodate the younger children, the bases are only 40 feet apart in a square-shaped field. Find the distance between home plate and second base in tee-ball. If necessary,

    asked on January 3, 2011
  43. spanish

    ___(1)___ (ser) una noche suave de primavera. Tumbados en el césped (lying on the grass) María y Jose ___(2)___ (observar, observed) al cielo (sky) A veces, un viento suave ___(3)___ (turbar, moved) las blancas cortinas (curtains) y María y Jose

    asked on December 8, 2010
  44. spanish

    THE ANSWER IS BEFORE THE NUMBER! f1. A boot verb is irregular A in four subjects B in two subjects C in three subjects D in one subject E in five subjects F in all subjects b2. Jugar is usually followed by which preposition before a sport or game? A de B a

    asked on November 8, 2010
  45. spanish

    home work check please d1. Eduardo es _____ Chile. A al; B en C a D de E del F all of the above b2. "Romeo and Juliet" es _____ Shakespeare. A al B de C en D a E del F all of the above. c3. Voy _____ los Estados Unidos. A de B en C al D del E dal F a e4.

    asked on October 4, 2010
  46. spanish

    please check my homework. 1. Yo__estoy___ en mi casa (in my house). 2. Jose, María, y yo _____estoy____ alegres. 3. Mario, tú, y yo ____estoy______ en el cine (at the movies). 4. El perro ___estamos_____ en el parque (at the park.) 5. Usted ____esta_____

    asked on September 13, 2010
  47. Macroeconomics

    What are the five types of economic resources

    asked on October 26, 2006
  48. history

    What was an effect of the United States' entry into World War I? Britain shifted most of its troops to the eastern front because they were no longer needed in France. Tensions developed between American and French troops over who would occupy the best

    asked on April 29, 2020
  49. Spanish

    How do you say "She said I could not" in Spanish?

    asked on December 7, 2015
  50. science

    What would you estimate to be the speed of a galaxy located 60 million light-years away?

    asked on October 2, 2015
  51. Math

    The perimeter of a square must be greater than 104 inches but less than 150 inches. Find the range of possible side lengths that satisfy these conditions. (Hint: the perimeter of a square is given by P=4s, where s represents the length of a side).

    asked on September 2, 2015
  52. Math

    I'm really confused on these two. Can someone help explain this to me? Thanks! :) 1.) What values of u are not permissible in the expression csc(u)tan(u)? 2.) What values of u are not permissible in the expression sin(u)cot(u)?

    asked on February 3, 2015
  53. Math

    I'm really confused on these two. Can someone help explain this to me? Thanks! :) 1.) What values of u are not permissible in the expression csc(u)tan(u)? 2.) What values of u are not permissible in the expression sin(u)cot(u)?

    asked on February 3, 2015
  54. physics

    A ball is shot out of a spring and into a hollow ballast which then swings upwards 2.5 cm. The ball has a mass of 0.10 kg, the ballast has a mass of 0.50 kg and the spring constant is 500 N/m. How fast was the ballast-ball system moving immediately after

    asked on November 5, 2014
  55. Math

    You have a 5/16 in. drill bit. Will it drill a hole large enough to fit a 5 mm bolt? Show two different ways to answer this question. Explain your thinking. I couldn't even figure out the first way. Please help!

    asked on October 6, 2014
  56. Math

    A regulation baseball bat must be 2/3/4 inches or less in diameter and shorter than 42 inches long. Which bat would not be allowed? a)diameter 6cm b) length 0.9m c)diameter 7m d)length 1.0668m d?

    asked on October 4, 2014
  57. Math

    Convert 86 inches to yards, feet, and inches? Why the inches again?

    asked on October 4, 2014
  58. Math

    Scarlet-Camille needs three lengths of wood to finish a project. She needs one piece measuring 148 cm, one piece measuring 38 cm, and one piece measuring 42 cm. Every time Scarlet-Camille cuts a length of wood she loses 3 mm of wood. If Scarlet-Camille can

    asked on October 4, 2014
  59. Math

    -80=8b-15+5b How do I solve this and what does check mean?

    asked on October 4, 2014
  60. Math

    One hundred sixty acres is a square with a side length of one-half a mile. How many hectares are in one square mile?

    asked on October 1, 2014
  61. Math

    An electrician was hired to run the wires for a surround-sound stereo speaker system. She purchased 2 rolls of 14-gauge speaker wire. Each roll contains 4 m of wire. For each of 2 speakers, 2 ft. of wire are required. For each of the other 2 speakers, 11

    asked on October 1, 2014
  62. Science

    Suppose a geologist is studying two distinct areas next to a spreading ridge. The magnetic direction of the minerals in the oldest area is opposite to the magnetic direction of minerals in the newest area. a) Which area is closest to the center of the

    asked on September 27, 2014
  63. Physics

    A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.25 and the push imparts an initial speed of 6.0m/s?

    asked on September 25, 2014
  64. Math

    Convert 62 inches to yards, feet, inches? How do I do all three at once? Please help.

    asked on September 24, 2014
  65. Math

    Simplify. (a) 2^3(5)^-2 =? (b) 2^-3/a^4 = 2^3a^4 =8a^4????

    asked on August 7, 2014
  66. Math

    How do I find the greatest common factor of 54, 81, and 135? I don't understand the tree diagram either. :(

    asked on August 1, 2014
  67. chemistry

    Assuming that the volumes of carbon diox- ide and of propane are measured under the same experimental conditions, what volume of carbon dioxide is produced by the complete combustion of 20 L of propane? i just don't understand

    asked on March 15, 2014
  68. chemistry

    A sample of hydrogen at 50◦C exerts a pressure of 0.377 atm. The gas is heated to 61◦C at constant volume. What will its new pressure be? how do i find the pressure? i don't understand!!!!!!!!!!!

    asked on March 9, 2014
  69. Physics

    A skateboarder, with an initial speed of 2.6m/s , rolls virtually friction free down a straight incline of length 18m in 3.3 s. What angle is the incline plane?

    asked on October 8, 2013
  70. Life Science

    If a sponge (from the ocean, not a cleaning sponge. :P) were torn apart by a predator, what would happen?

    asked on May 6, 2013
  71. Chem help asap

    A 890 mL NaCl solution is diluted to a volume of 1.15 and a concentration of 8.00 . What was the initial concentration? How do I go about this? M1V1=M2V2? and if it is how do I replace the variables?

    asked on November 14, 2012
  72. Spanish check

    C. La vida de dos estudiantes. Complete each sentence with the correct form of the verb in parentheses. 1. Rodrigo y su novia estáis (estar) despiertos a las siete de la mañana. 2. Ella prepara (preparar) el café y, a las ocho de la mañana, los dos

    asked on September 23, 2012
  73. Spanish check

    C. La vida de dos estudiantes. Complete each sentence with the correct form of the verb in parentheses. 1. Rodrigo y su novia estáis despiertos a las siete de la mañana. 2. Ella prepara el café y, a las ocho de la mañana, los dos tomamos el desayuno

    asked on September 23, 2012
  74. Spanish CHECK

    (On the contrary). Flor is describing the courses she is taking, but you have an entirely different point of view. Complete each sentence, using the opposite of the word in italics. ¡OJO! Remember that adjectives must agree in number and gender with the

    asked on September 22, 2012
  75. Stats

    what are the upper and lower limits of the variable below? upper lower 15-19 60-69 * is there a formula i need to use for this.

    asked on September 12, 2012
  76. statistics

    Reading placement scores for a particular college are normally distributed with a mean of 72 and a standard deviation of 7. a) draw a sketch of the reading placement scores for students at this college. be sure to mark the mean and also to mark one and two

    asked on June 3, 2012
  77. Visual Arts

    1.Using the conventional color wheel, name two PAIRS of complementary colors. This means at least 4 colors. When you put complementary colors next to each other, What is the visual effect? 2. Describe the difference between visual texture and actual

    asked on April 12, 2012
  78. algebra

    least common denominator for these two rational expressions. ( / stands for fraction bar and the ^ means it's squared. i don't understand these at all. a/ a^2-36 2a/a^2+5a-6

    asked on February 28, 2012
  79. Early American Literature

    I had to read an excerpt from Ralph Waldo Emerson's "Self-Reliance". My assignment is to answer uestions about it. The uestion I am stumped on is: How important is Emerson's use of the adjective "foolish" in his discussion of consistency?

    asked on February 22, 2012
  80. Chemistry

    What will be the concentration if 52 milliters of a solution that is 12 parts per million in sodium chloride is diluted with enough water to make 97 millilters of solution?

    asked on February 14, 2012
  81. Chemistry

    How many grams of potassium phosphate must be dissolved in 3.75 Liters of water to produce a soltuion that contains 8*10^23 potassium ions?

    asked on February 14, 2012
  82. Physics

    You are keeping pace with another runner, at 4 minutes per mile, but are 16 m behind her when she is 130m from the finish line.At what pace will you be running at the finish? *Express your answer using two significant figures.

    asked on January 30, 2012
  83. College Physics

    If you square the equation v=v0 + at, you'll have an expression for v2. Equate the two expressions for v2, and show that the resulting equation reduces to the equation x= x0+v0t + 1/2at2.

    asked on January 30, 2012
  84. Physics

    The tallest volcano in the solar system is the 29 km tall Martian volcano, Olympus Mons. An astronaut drops a ball off the rim of the crater and that the free fall acceleration of the ball remains constant throughout the ball’s 29 km fall at a value of

    asked on October 13, 2011
  85. Physics (3)

    The mass m=1.00 kg is set up as a pendulum of length 0.6m . Initially in the position of h=0.2 m above the lowest point, and the pendulum is given initial speed of 1.00 m/s. What is the largest mass M that could be temporarily lifted in such setup?

    asked on October 13, 2011
  86. calculus - limits

    Does the limit lim 2011t/3-(squareroot)t+9 exist ? t-0

    asked on October 4, 2011
  87. physics - 1

    By algebraic manipulation of the first two kinematic equations for one-dimensional motion: 1) vf = vi + at 2) xf = xi + (vi)(t) + (1/2)(a)(t)^2 Obtain the other two kinematic equations : 3) vf^2 - vi^2 = 2ax 4) xf = xi + (1/2)(vi + vf)t

    asked on September 22, 2011
  88. Physics

    The projectile motion is fired with velocity of magnitude vo at the angle feta. Find feta for which the maximum elevation of the projectile is twice its range

    asked on September 22, 2011
  89. Physics

    The projectile motion is fired with velocity of magnitude vo at the angle feta. Find feta for which the maximum elevation of the projectile is twice its range

    asked on September 22, 2011
  90. math

    simplify 5d+3(2-3d)

    asked on June 1, 2011
  91. chem

    What mass of KCl (MM = 74.55 g/mol) is required to make 600 mL of a 0.175 M solution

    asked on April 12, 2011
  92. chemistry

    A 375 g piece of iron was heated to 975 °C and then quenched in a bucket containing one gallon of water at 20 °C. What was the temperature of the water after the iron and the water came to thermal equilibrium?

    asked on April 10, 2011
  93. chemistry

    A 375 g piece of iron was heated to 975 °C and then quenched in a bucket containing one gallon of water at 20 °C. What was the temperature of the water after the iron and the water came to thermal equilibrium?

    asked on April 10, 2011
  94. Genetics

    In cats the allele B produces black, whereas b produces yellow. Neither gene is dominant, and in the heterozygous state the phenotype is a combination of yellow and black spots called tortoise-shell. The alleles B and b are “X-Linked”. If a

    asked on April 5, 2011
  95. Biology

    The gene for fur color in rabbits is an incompletely dominant situation: BB rabbits are brown, Bb rabbits are grey, and bb rabbits are white. The gene for fur color distribution is however co-dominant. This gene, S, has two alleles, S1 and S2; S1S1 animals

    asked on April 5, 2011
  96. Biology

    In Siberian Huskies base fur color is represented by black & white fur BB, tan/yellow & white fur Bb, and white only fur bb. Siberians all posses two style of fur wire hair (W_) and smooth (ww). What would the genotype and phenotype frequencies be for a

    asked on April 5, 2011
  97. Biology

    . A woman whose father was color blind (X-linked, recessive) and who has type A blood has accused a man who is himself color blind of fathering her child. The accused man has type B blood. For each of the following cases, indicate whether or not the man

    asked on April 5, 2011
  98. math

    What are all the angles in each garden if there are two similar squares

    asked on February 9, 2011
  99. Physics

    Find the average velocity over the time interval from 1 to 3 seconds. Express your answer in meters per second to the nearest integer.

    asked on January 30, 2011
  100. geometry

    If a pentagon has a side of 140, how many inches is the rest of the side?

    asked on January 26, 2011


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