Mandy

Popular questions and responses by Mandy
  1. Chemistry

    Which of the following will be more soluble in an acidic solution than in pure water? AgI, Ni(OH)2, KClO4, SrSO4, CaCO3

    asked on December 5, 2013
  2. AP CHEMISTRY NEED HELP PLEASE!

    Calculate the enthalpy of combustion of C3H6: C3H6 (g) + 9/2 O2 (g) yield 3CO2 + 3H2O using the following data: 3C (s) + 3H2 (g) yield C3H6 (g) change in H= 53.3 kJ C(s)+O2 (g) yield CO2 (g) change in H= -394kJ H2 (g) + 1/2 O2 (g) yield H2O (l) change in

    asked on January 24, 2012
  3. college pre-calculus

    An investment of $4000 is deposited into an account in which interest is compounded monthly. Complete the table by filling in the amounts to which the investment grows at the indicated times. (Round your answers to the nearest cent.) r = 4%

    asked on September 18, 2012
  4. maths

    The sum of a number and four times its reciprocal is 5.Find possible values of the number.

    asked on January 28, 2014
  5. Business Math

    A local Barnes and Noble paid a $79.33 net price for each calculus textbook. The publisher offered a 10% trade discount. What was the publisher’s list price? (Round your answer to the nearest cent.)

    asked on February 27, 2014
  6. Chemistry - pH

    Calculate the pH of each of the following solutions: a) .35 M hydrochloric acid, HCl b) .35 M acetic acid, HC2H3O2 c) .35 M sodium hydroxide, NaOH Can someone please explain to me how to calculate the pH in a way that is easy to understand? I am confused.

    asked on September 14, 2009
  7. English; conmas

    Where should commas be placed? Combine flour shortening pecans and cold water to make a tasty pie crust.

    asked on November 16, 2011
  8. psychology

    Bruce is furious when his midterm is returned with a C grade. He tells his sociology professor that he had read each of the assigned chapters three times, and if someone can do that and just be average, then there’s something wrong with the test! The

    asked on April 26, 2017
  9. chemistry

    the solubility of Kl is 50g in 100g of H2O at 20 celcius, if 110g of Kl are added to 220g of H2O, is the soultion saturated or unsaturated? and what is the %m/m of the solution?

    asked on November 16, 2011
  10. Chem

    A 0.170-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium? Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.

    asked on December 5, 2013
  11. Sentences

    What kind of sentence is this: Noah Webster supported himself through sales of his spelling book over 100 million copies of the book were sold. 1.Properly constructed sentence 2.Dangler 3.Run-on 4.Misplaced part We will start with the idea that this is NOT

    asked on October 19, 2006
  12. Chemistry

    Of the compounds below,_____ has the smallest ionic separation and why? A.RbF B.K2S C.SrBr2 D.KF E.RbCl --> How does one determine if a compound has a high or low ionic separation, and what is ionic separation?

    asked on March 20, 2017
  13. Chemistry

    Can anyone help and check my answers? A. 8.43 cm to millimeters--- 84.3 millimeters. B. 2.41x10^2 cm to meterss--- 0.0241 meters. C. 294.5 nm to centimeters--- I don't know how to concert this. D. 1.445x10^4 m to kilometers--- 0.001443 Kilometers. E. 235.3

    asked on July 21, 2008
  14. Mathematics

    The difference between two numbers is 9 and the product of the numbers is 162. Find the two numbers. Explain your working

    asked on November 22, 2011
  15. Chemistry

    The Ksp of calcium hydroxide, Ca(OH)2, is 4.68 x 10-6 at 289.15K. Calculate the pH of a saturated solution. Here's my work: 4.68 x 10-6= 4s^3 s= 0.0105 -log(0.0105)= 1.98 14-1.98=12.02 The answer is supposed to be 12.324, but I'm not sure what I'm doing

    asked on December 4, 2014
  16. math

    a 17 foot piece of string is cut into two pieces so that the longer piece is 5 feet longer than twice the shorter piece. If the shorter piece is x feet long, find the lengths of both pieces.

    asked on December 12, 2012
  17. english

    my garden is full of water,because of yesterday's rain . correct punctuation

    asked on June 1, 2009
  18. chemistry

    How do i calculate the effective nuclear charge of a 3d electron of copper? what is the zeff. for a electron in the 3d orbital of copper. i looked up the answer to be 13.20, but i calculated 13.05 this is my work: (1s2)(2s2 2p6)(3s2 3p6)(3d10)(4s1)

    asked on November 10, 2008
  19. calculus

    A potter forms a piece of clay into a cylinder. As he rolls it, the length,L, of the cylinder increases and the radius, r, decreases. If the length of the cylinder is increasing at .1 cm per second, find the rate at which the radius is changing when the

    asked on February 3, 2010
  20. Chemistry II

    Acetone, C3H6O, is the main ingredient of nail polish remover. A solution is made up by adding 35.0mL of acetone(d=0.790g/mL) to 50.0mL of ethyl alcohol,C2H6O(d=0.798 g/mL). Assume that the volumes are additive. From this information calculate the molarity

    asked on September 27, 2009
  21. english

    My little sister is a big baby; she cries all the time. correct punctuation

    asked on June 1, 2009
  22. chemistry

    Draw the Lewis structure of NO2- Assign formal charges to each atom in the O3 molecule shown below. Be sure to click the +/- button below (it will turn yellow when activated) before clicking on the molecule. .. .. .. :O--O==O .. .. Based on formal charges,

    asked on November 14, 2008
  23. Chemisrty

    if electricity of sufficient voltage is passed into a solution of potassium iodide in water, a reaction takes place in which elemental hydrogen gas and elemental iodine are produced, leaving a solution of potassium hydroxide. what is the unbalanced

    asked on March 20, 2016
  24. math

    The label on a can of lemonade gives the volume as 12 fl oz, or 355 mL. Verify that these two measurements are nearly equivalent. Please help me with this question.

    asked on November 24, 2015
  25. addmath A.P.

    Tn=3n-2 Find the first term,a;the common difference,d;and then find the 5th term.

    asked on March 7, 2015
  26. Chemisty

    Consider the reaction of sulfuric acid, H2SO4, with sodium hydroxide, NaOH. H2SO4(aq) + 2 NaOH(aq) -> 2H2O(l) + Na2SO4(aq). Suppose a beaker contains 35.0mL of 0.175M H2SO4. How many moles of NaOH are needed to react completely with sulfuric acid? Thank

    asked on October 22, 2014
  27. Chemistry

    What volume of 5.0 M H2SO4 should be diluted to 100mL to prepare a 0.25 M H2SO4 M solution? I know the molar mass of H2SO4 is 98g but I'm not sure where exactly that fits in and how I'm supposed to get it to be diluted. Thank you!

    asked on October 8, 2014
  28. math

    a 27 inch board is to be cut into three pieces so that the second piece is 3 times as long as the first piece and the third piece is 5 times as long as the first piece. If x represents the length of the first piece, find the length of all three pieces.

    asked on December 11, 2012
  29. Physics

    Why is the total distance traveled by a mass traveling in a circle of radius R during n revolutions, 2piRn?

    asked on March 6, 2011
  30. physics

    a passenger at an airport pulls a rolling suitcase by its handle. If the force used is 10N and the handle makes an angle of 25 degrees to the horizontal, what is the work done by the pulling force while the passenger walks 200m?

    asked on January 6, 2011
  31. Chemistry II

    Eugenol, the active ingredient in cloves, has a formula of C10H12O2. What is the boiling point of a solution containing 1.14g of eugenol dissolved in 10.0g of benzene? The boiling point of benzene is 80.1C and the boiling point elevation constant for

    asked on September 28, 2009
  32. capitalization

    we listened to that old song again,"you and me against the world." (We, You, And, Me, Against, The, World )

    asked on June 1, 2009
  33. Psychology

    analyze the function of emotions as motive.

    asked on July 19, 2014
  34. add maths

    Given that log2 3=h and log2 5=k, express log2 0.45 in terms of h and k.

    asked on May 3, 2014
  35. english

    Fable for tomorrow This town does not actually exist, but it might easily have a thousand counterparts in America or elsewhere in the world. I know of no community that has experienced all the misfortunes I describe. Yet every one of these disasters has

    asked on May 8, 2013
  36. english

    WHOEVER has made a voyage up the Hudson must remember the Kaatskill mountains. They are a dismembered branch of the great Appalachian family, and are seen away to the west of the river, swelling up to a noble height, and lording it over the surrounding

    asked on May 4, 2013
  37. PS

    An advantage of using media resources for researching your topic is: A. you may listen to an expert in the subject area that you are interested in. B. media resources may set you in a direction of research you did not expect. C. watching a television or

    asked on April 24, 2013
  38. math

    when it came to pass out valentines each of the 24 students had valentine to give to the other students in the class how many total valentines will be passede out?

    asked on January 27, 2013
  39. statistics

    For a particular sample of 53 scores on a psychology exam, the following results were obtained. First quartile = 44 Third quartile = 68 Standard deviation = 8 Range = 55 Mean = 54 Median = 54 Mode = 71 Midrange = 64 I. What score was earned by more

    asked on January 27, 2013
  40. education

    6. Which of the following statements about the field of child development is correct? A. It’s devoted to understanding human constancy and change over the lifespan. B. It’s part of a larger, interdisciplinary field known as developmental science. C. It

    asked on October 1, 2012
  41. chemistry

    which temperature is colder: 50F or 50C???

    asked on September 26, 2012
  42. calculus

    Let f (x) = x^2 + 5x-14. Find the open intervals on which f is concave up (down). Then determine the xcoordinates of all inflection points of f 1. f is concave up on the intervals 2. f is concave down on the intervals 3. The inflection points occur at x

    asked on March 19, 2012
  43. chemistry

    balance: SO2(g)+O2(g)------->SO3(g) the concentration of SO2 and O2 are determined to be [0.06] and [0.03] if the following reaction has a Kc of 3.6x10^2, what is the concentration of SO3???? any work would be much appreciated thank you!!

    asked on February 28, 2012
  44. chemistry

    Al2O3(s)+6NO(g)---->5N2(g)+6H2O(l) how many grams of Nitric Oxide are required to produce 145g of nitrogen in the following reaction?

    asked on February 27, 2012
  45. Statistics

    The basketball player Steve Nash is the all-time career free throw shooter among active players. He makes about 90% of his free throws. In today's game, Nash misses his first two free throws. The TV commentator says, "Nash's technique looks out of rhythm

    asked on November 2, 2011
  46. Physics

    The center of a 1.50 diameter spherical pocket of oil is 1.20 beneath the Earth's surface. Estimate by what percentage directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is 800 kg/m^3.

    asked on March 18, 2011
  47. PHYSICS HELP ASAP

    a 3 kg block slides down a frictionless plane inclined 20 degrees to the horizontal. If the length of the plane's surface is 1.50m, how much work is done, and by what force? suppose the coefficient of kinetic friction between the block and the plane. What

    asked on January 10, 2011
  48. chemistry

    The value of pKb for the base ethylamine (CH3CH2NH2) is 3.19 at 25°C, while the pKa for formic acid (HCO2H) is 3.74, also at 25°C. a) Calculate the value of the equilibrium constant Kc for the following aqueous equilibrium: HCO2– (aq) +

    asked on April 1, 2010
  49. physics

    Two point charges 1.5 cm apart have an electric potential energy -150 mu J. The total charge is 34 nC. what are q_1 and q_2?

    asked on March 26, 2010
  50. capitalization

    the henderson family moved to chicago from the east coast. ( The, Henderson, Chicago, East, Coast )

    asked on June 1, 2009
  51. english

    Sally wants a new bicycle, but her mother and father will not buy her one. correct punctuation

    asked on June 1, 2009
  52. Algebra

    x | y /////////// x | y 0 | -3 ////////// 4 | -3 1 | -9 ////////// 5 | -6 2 | -27 ////////// 6 | -9 3 | -81 ////////// 7 | -12 4 | -243 ////////// 8 | -15 I did this to separate the charts better Use the tables to choose the correct statements. a. Table 1

    asked on May 18, 2020
  53. history

    What change was made in 1969 to South Carolina constitution of 1895? A. The governor was permitted to succeed. B. The residency requirement for voting was eliminated. C. The court system would no longer be controlled by the state senate. D. The legislature

    asked on April 13, 2020
  54. Chemistry

    Of the compounds below,_____ has the smallest ionic separation and why? A.RbF B.K2S C.SrBr2 D.KF E.RbCl --> How does one determine if a compound has a high or low ionic separation, and what is ionic separation?

    asked on March 20, 2017
  55. math

    what are 3 ratios for 1/10?

    asked on October 18, 2016
  56. Math: Multistep area problems

    Mark is covering an 8-inch-square board with 1-inch-square tiles. He uses gray tiles to make four 2-in. by 2-in. squares. He covers the rest of the board with white tiles. How many more white tiles than gray tiles will Mark use?

    asked on June 2, 2016
  57. Geography

    Which is the result of zero population growth? population stability no natural increase*** a rapid decline in human population the elimination of high density populations

    asked on May 6, 2016
  58. physical science

    A man applies a force of 150N to pull a 20kg box with a rope that makes an angle of 60percent with the horizontal.The box experience a kinetic friction of 15N. Calculate the acceleration of the box.

    asked on June 6, 2015
  59. Physics

    A 1500kg car is travelling around a large roundabout of radius 40m at a constant speed of 50kmh-1. Calculate the time it takes to go halfway aound the roundabout. Just wondering which equation I should use. Thanks

    asked on March 26, 2015
  60. addmath A.P.

    An arithmetic progression has 8terms.The sum of all 8terms is 180 and the sum of all odd terms is 80. Calculate (a)the first term and common difference (b)the last term

    asked on March 8, 2015
  61. Genetics

    A portion of alcohol dehydrogenase enzyme contains 375 amino acids. Including both amino acid and all other necessary codes, how long is the coding portion of the corresponding mRNA? Thanks

    asked on November 16, 2014
  62. Chemisty

    In the titration of total acid with sodium hydroxide, NaOH, it was determined that 36.03mL of 0.0980M NaOH was needed to neutralize all the acid in a 10.0mL aliquot of a powdered drink mix solution. In a second titration, it was determined that were 1.45 x

    asked on October 22, 2014
  63. chemistry pls help me asap

    2.08g of metal Y react with 0.96g of oxygen to form a metal oxide.The empirical formula of the metal oxide is Y2O3.What is the relative atomic mass of metal Y.

    asked on May 15, 2014
  64. chemistry

    A student dissolved 3.65 g of hydrogen chloride gas,HCL in water to make 1.0dm^3 of solution.Calculate the volume of a 0.1 mol dm^-3 barium hydroxide,Ba(OH)2 solution required to completely neutralise 25.0 cm^3 of the acid solution.(RAM:H,1;CL,35.5)

    asked on May 7, 2014
  65. Business Math

    Rainfall for May in Fiji averages 9" according to World Travel Guide. This year it rained 5% less. How many inches did it rain this year?

    asked on February 19, 2014
  66. maths

    A woman is now 4 times older than her daughter.Six years ago,the product of their ages was 136.Find their present ages.

    asked on January 26, 2014
  67. Science

    Can someone please please help me? I don't have a text book, i have a online book and it isn't working. Can someone please be nice and help me? Science isn't my subject! 1. Why is Earth’s temperature just right for life? (1 point) Earth’s core is hot

    asked on January 21, 2014
  68. History!

    Can someone please help me? Thanks! I'm really behind and i need to get caught up and i just really need some help! Thanks!! :) 1. As a result of the French and Indian War, _____ claimed all land west of the Mississippi River, and _____ gained control of

    asked on December 18, 2013
  69. Chemistry

    Calculate the change in pH when 5.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).

    asked on December 5, 2013
  70. chemistry

    For the following reaction, identify the substances oxidized, reduced and the oxidizing and reducing agents? 2SO2 + O2 --> 2SO3

    asked on October 30, 2013
  71. chemistry

    For the following reaction, identify the substances oxidized, reduced and the oxidizing and reducing agents? 2SO2 + O2 --> 2SO3

    asked on October 30, 2013
  72. math

    twice the sum of a number and 3 is equal to three times the difference of the number and 9. find the number

    asked on December 12, 2012
  73. math

    the sum of 5/3 and twice a number is equal to 16/3 subtracted from three times the number. find the number

    asked on December 12, 2012
  74. chemistry

    what type of bond would carbon, sodium, and neon form?

    asked on September 30, 2012
  75. Math

    Find the base of a parallelogram with a height of 9.7 meters and an area of 58.2 square meters.

    asked on April 25, 2012
  76. chemistry

    balance:H2(g)+S2(g)------->H2S(G)+heat A.) how would the equilibrium be affected give the following: - increase in temperature - increase in hydrogen concentration - increase in reaction container of volume B.) is equilibrium homogeneus or heterogeneus?

    asked on February 28, 2012
  77. chemistry

    Al2O3+6HCl----->AlCl3+3H2O what type of reaction is this? -combination -decompisition -or double displacement reaction

    asked on February 27, 2012
  78. Math

    A boat crew rowed 20 miles downstream, with the current, in 2hours. The return trip upstream, against the current, covered the same distance, but took 5 hours. Dine the crew's rowing rate in still water and the rate of the current? Still water _ MPH and

    asked on December 11, 2011
  79. AP CHEMISTRY

    what volume of nitrogen at 215 degrees celsius and 715mm Hg would be required to react with 0.100 mol of hydrogen to produce ammonia? N2(g) + 3H2(g)-->2NH3(g)? Any help is greatly appreciated.

    asked on December 8, 2011
  80. AP CHEMISTRY NEED HELP PLEASE

    What Volume of nitrogen at STP would be required to react with 0.100 mol of hydrogen to produce ammonia? N2(g) +3H2 (g)(arrow) 2NH3(g)

    asked on December 8, 2011
  81. math

    A diagonal of a rectangle measures 61cm. The width of the rectangle is 11cm. Find the length of the rectangle.

    asked on December 7, 2011
  82. math

    Solve the equation by using the square root property. Simplify all radicals. 2x^2 = 11 how do I solve this?

    asked on December 3, 2011
  83. math

    IF a plane can travel 500 miles per hour with the wind and 420 miles per hour against the wind, find the speed of the plane in still air.

    asked on December 2, 2011
  84. stoichiometry

    How many grams of Nitric oxide are required to produce 145g of nitrogen in this reaction: Al2O3(s)+6NO(g)---->5N2(g)+6H2o(l)

    asked on November 17, 2011
  85. physics

    You know your mass is 69 kg , but when you stand on a bathroom scale in an elevator, it says your mass is 78 kg. What is the magnitude of the acceleration of the elevator?

    asked on March 17, 2011
  86. Statistics-- help needed despertaly!!!!!!

    McMaster University researchers Margo Wilson and Martin Daly showed 209 male and female students pictures of attractive and not-so-attractive people of the opposite sex. Each was then offered a chance to win a prize. They could accept a check for between

    asked on December 1, 2010
  87. Statistics

    McMaster University researchers Margo Wilson and Martin Daly showed 209 male and female students pictures of attractive and not-so-attractive people of the opposite sex. Each was then offered a chance to win a prize. They could accept a check for between

    asked on November 30, 2010
  88. math urgent

    a motorboat takes 4 hrs to travel 256 miles going upstream. the return trip takes 2 hours going down stream. what is the rate of the boat in still water and what is the rate current. rate of the boat in still water=mi/hr rate of the current=mi/hr

    asked on November 29, 2010
  89. Chemistry

    in Synthesis of para-Methylacetanilide What important bands (include chemical shifts) would begin to disappear in a H-1 NMR spectrum and what important bands would begin to appear in the H-1 NMR spectrum as the reaction progressed?

    asked on November 27, 2010
  90. Chemistry

    In hydration of of 2-Ethyl-1-Butene What important bands (include wavenumbers) would begin to disappear in an IR spectrum and what important bands would begin to appear in the IR spectrum as the reaction progressed?

    asked on November 27, 2010
  91. gcse english

    compare these two quotes they fight tybalt falls he gave me a tremendous dip and roll so that the church jumped over its weathercock

    asked on November 7, 2010
  92. english gcse

    shakespeare usually used short stage directions which one is the odd one out and why

    asked on November 7, 2010
  93. Business

    Research the Goldman Sachs website. Using your research findings from the Library and the Internet, develop both an EFAS (External Factors Analysis Summary) table and an IFAS (Internal Factors Analysis Summary) table. The tables are to be submitted in one

    asked on October 11, 2010
  94. Chemistry

    10% of a sample reacts in 25 s. If the reaction follows first order kinetics, how long would it take for half the sample to react?

    asked on May 3, 2010
  95. chemistry

    Calculate the boiling point elevation of a solution containing 22.8 g of glucose (C6H12O6) dissolved in 672.0 g of water. Calculate the freezing point depression for the same solution.

    asked on February 28, 2010
  96. chemistry

    Calculate the boiling point elevation of a solution containing 22.8 g of glucose (C6H12O6) dissolved in 672.0 g of water. Calculate the freezing point depression for the same solution.

    asked on February 28, 2010
  97. Chemistry II

    Calculate the enthalpy for the following reaction: 4 NH3 (g) + 5 O2 (g) into 4 NO (g) + 6 H2O (g). You may only use the following information: N2 (g) + O2 (g) into 2 NO (g); Delta Hf = 180.6 kJ N2 (g) + 3 H2 (g) into 2 NH3 (g); Delta Hf = -91.8 kJ 2 H2 (g)

    asked on November 29, 2009
  98. chemistry

    How do you figure out the molecular weight?

    asked on November 6, 2009
  99. Chemistry II

    Acetone, C3H6O, is the main ingredient of nail polish remover. A solution is made up by adding 35.0mL of acetone(d=0.790g/mL) to 50.0mL of ethyl alcohol,C2H6O(d=0.798 g/mL). Assume that the volumes are additive. From this information calculate the molarity

    asked on September 27, 2009
  100. Chemistry II

    A syringe with a movable piston, contains 0.057g of carbon dioxide gas at 23.5C. If the pressure in the syringe was 953mmHg, what would be the volume of the gas in the syringe? I got 2.59L, but it was wrong.

    asked on September 27, 2009

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