Popular questions and responses by chrissy
  1. Chemical Formulas and Reactions

    When aqueous copper(II)chloride reacts with aqueous ammonium phosphate, soluble ammonium chloride forms and copper(II) phosphate precipitates out of solution. 1. Write the balanced molecular equationfor this reaction. 2. Write the balanced complete ionic

    asked on December 29, 2006
  2. chemistry need help

    How many atoms of aluminum are there in 125 g of aluminum foil?

    asked on March 25, 2009
  3. chemistry/science

    Carbon tetrachloride, CCL4, is nonpolar. What force holds the molecules together?

    asked on April 19, 2009
  4. history

    What factor most explains why the majority of Russians live in the western part of the country? A. government regulations B. climate C. language D. natural resources Which of the following is the major religion in Russia? A. Christianity B. Judaism C.

    asked on January 8, 2019
  5. Dr.Bob222- IChemical formulas&Reactions

    When aqueous copper(II)chloride reacts with aqueous ammonium phosphate, soluble ammonium chloride forms and copper(II) phosphate precipitates out of solution. 1. Write the balanced molecular equationfor this reaction. 2. Write the balanced complete ionic

    asked on January 3, 2007
  6. biochem

    Exactly 100 bacteria with a generation time of 30 min are introduced into fresh sterile broth at 8am and maintained at an optimum incubation temperature throughout the day. How many bacterian are present at 3pm? How many generation will take place by 5pm

    asked on September 24, 2009
  7. Geometry

    The diagonals of rectangle ABCD are AC and BD. Hallie found that the distances from the point where the diagonals intersects to each vertex were the same. Which of the following conjectures could she make? a. Diagonals of a rectangle are congruent. b.

    asked on December 10, 2009
  8. arithmetic

    a stock clerk had 600 pads on hand. He then issued 3/8 of his supply of pads to division X,1/4 to division Y and 1/6 to division Z. The number of pads remaining in stock is? I don't get how to solve this problem. In arithmetic problems, the word "of"

    asked on July 28, 2007
  9. algebra

    Sheila is climbing on a ladder that is attached against the side of a jungle gym wall. She is 5 feet off the ground and 3 feet from the base of the ladder, which is 15 feet from the wall. How high up the wall is the top of the ladder?

    asked on March 7, 2015
  10. Algebra 2

    How would I put this word problem into a system of equations (three equations)? Once its in equation form I can easily solve it... A natural food store makes its own brand of trail mix out of dried apples, raisins, and peanuts. One pound of the mixture

    asked on September 28, 2010
  11. arithmetics

    hello can someone help me understand these questions? It's for a test that has arithmetic questions on it and Im trying to study them but I cant do that unless I actually know how to do them. #5 A carpenter needs 4 boards, each 2 feet 9 inches long. If

    asked on August 1, 2007
  12. chem

    What VSEPR “shapes” and bond angles do you find in Toluene?

    asked on August 12, 2009
  13. chemistry

    Here is a reaction: 2Al+3H2SO4--->Al2(SO4)+3H2 determine the oxidation numbers of each element in both the rectants and the products of this oxidation reduction reaction of aluminum and sulfuric acid? Which element is oxidized in this reaction? Which

    asked on January 9, 2007
  14. spanish

    Quien es el chico?

    asked on February 21, 2010
  15. Chemistry

    Hi! I kind of need help to get started with these four problems. There are more problems like the ones below. It would be great if I had an example of each of the four problems. Thanks! FeSO4(aq)+ KCL(aq) (for problem 1 and 2) 1)When the following

    asked on October 15, 2006
  16. Chemistry

    If a solution were to change its composition during freezing how do you think this would change the cooling curve.

    asked on February 6, 2007
  17. geometry

    What is the equation of the line 2x + 3y = -6 after a dilation of 1/2 centered at the origin?

    asked on May 22, 2019
  18. math

    can someone please help me set up inequalities based on the info below?: jayanta is working to raise money for the homeless by sending information letters and making follow-up calls to local labor organizations and church gorups. She discovered that each

    asked on October 15, 2009
  19. Equation stuff...

    Write your answer in standard form with integer coefficients. 1. (-5, 2); m = 2/5 2.(-6, -1); m=-4 how do i do this?

    asked on October 26, 2009
  20. Help with deductive reasoning

    Determine whether you can use the Law of Syllogism to reach a valid conclusion from each set of statements. 1. If a dog eats Superdog Dog Food, he will be happy. Rover is happy. 2. If an angle is supplementary to an obtuse angle, then it is acute. If an

    asked on October 5, 2009
  21. History

    Describe the measures workers during the second industrial revolution took to improve conditions. Also describe technological innovations that improved urban life. My answer: Workers attempted to unionize in hopes of better pay and work conditions. My

    asked on September 27, 2007
  22. Bobpursley plz help

    Can you please check my answers 3. Tx=2x+1,XW=x+7;TW Tx+XW=TW 2x+1+x+7+TW 3x+1+7=TW Answer: 3x+8+TW 4. WX=X+5,TW=4x+5;TX WX+TW=TX x+5+4x+5=TX 5x+5+5=TX 5x+10=TX

    asked on August 24, 2009
  23. arithmetic

    The wage rate in a certain trade is $8.60 and hour for a 40 hour work week and 1 1/2 times the base pay for overtime. An employee who works 48 hours in a week earns? The employee's gross pay (before taxes and other deductions): 8.6 x 40 = a 8.6 x 1.5 x 8 =

    asked on July 28, 2007
  24. Chemistry

    What is the solubility of CuCl when it is in a solution of 0.35 M NaCl?(CuCl has Ksp=1.9 x 10^-7) The Ksp is given by Ksp=[Cu+][Cl-] if x=[Cu+] then in our mixture we have x moles l^-1 [Cu+] x moles l^-1 [Cl-] 0.35 moles l^-1 [Cl-] from the NaCl (there is

    asked on April 10, 2007
  25. im back : )

    I have a bunch of questions i hope someone could help me with? #1 what is the fifth term in this series? 4 1/2; 8 3/4; 13; 17 1/4 ? I know it is 21 1/2... but how to i figure that? #2 a manufacturer has 3,375 yards of material on hand. If the average dress

    asked on July 30, 2007
  26. chemistry

    2NO + O2 = 2NO2 How many grams of NO2 will be produced when 5.00 moles of NO react?

    asked on May 14, 2016
  27. Algebra

    The length of a rectangular garden is 4 m greater than the width. the area is 77m^2. find the dimensions of the garden.

    asked on February 6, 2013
  28. Calculus-Area between curves

    Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. 2y=4*sqrt(x) , y=5 and 2y+4x=8 please help! i've been trying this problem the last couple days, even asked a TA for help,

    asked on November 21, 2013
  29. how about his one

    -7+ 5x = 10x-2? im not sure I know its -1, but im not sure how. -7 + 5x = 10x - 2 Since we need to get the unknowns on one side and the knowns on the other side and change their signs: 5x - 10x = 7 - 2 -5x = 5 x = -1 wait how did you what number did you

    asked on August 1, 2007
  30. Chemistry

    The chemical reaction N2(g)+ 3H2(g) 2NH3(g) is at equilibrium. An expirimenter increases the volume of the reaction chamber by 10%. Explain what happens to bith the forward and reverse reaction rates from the moment the volume is changed until equilibrium

    asked on April 12, 2007
  31. Chemistry

    propane(C^3H^8)is used as a fuel. Propane is a type of hydrocarbon. Write a balanced equation for the combustion of propane in oxygen. Assume that the combustion is complete. Hydrocarbons (C and H compounds of which propane is one) burn in oxygen to

    asked on January 8, 2007
  32. ap java

    an old-fashioned computer has just 16 bits available to represent an address of a memory location. how many total memory locations can be addressed in this machine? what formula would i use to find this answer?

    asked on September 12, 2010
  33. Chemistry

    Suppose you are titrating an unknown acid soluition with 0.100 N KOH. What is the normality of the acid if 25.00 mL of it requires 35.20 mL of base? I got 0.07 N I am not sure if I did the problem correctly and need some help.

    asked on December 14, 2009
  34. Economics

    Why would a country choose to have a mixed economy? I know a mixed economy is a combination of a command and a free market economy. I don't understand the point of combining these two types of economies because they are basically totally opposite.It would

    asked on February 12, 2007
  35. Physics

    Consider the skateboarder in the figure below. If she has a mass of 57 kg, an initial velocity of 21 m/s, and a velocity of 10 m/s at the top of the ramp, what is the work done by friction on the skateboarder? Ignore the kinetic energy of the skateboard's

    asked on October 17, 2014
  36. Chemistry

    I have to write the balanced equation for the reaction between hydrochloric acid and zinc metal.I came to the answer of: HCl+Zn(s)-->H(g)+ ZnCl Can someone tell me if this is the correct balanced equation for this reaction? No it isn't but it's close. The

    asked on April 23, 2007
  37. data management g12

    a bridge hand consists of 13 cards. how many bridge hands include 5 cards of one suit, 6 of a second, and 2 cards of a third?

    asked on October 31, 2010
  38. literature

    at the beginning of "young goodman brown," brown's wife says, "pray tarry with me this night, dear husband, of all nights in the year" (1). this statment is an example of

    asked on September 30, 2008
  39. Chemistry

    Write a balanced equation for the reaction between hydrochloric acid and zinc metal. Zinc + hydrochloric acid ==> zinc chloride + hydrogen. These are the reactants and the products. You make it into formulae and balance it. I shall be happy to check your

    asked on April 19, 2007
  40. Psychology

    In the nature vs. nurture debate, what are some arguments that side with genetics (nature) being more influential on human development than human environment and experience (nurture)?

    asked on October 25, 2008
  41. pre algebra

    The length and width of a rectangle are 5 feet and 2 feet, respectively a similar rectangle has a width of 8 feet. What is the length of the second rectangle?

    asked on February 24, 2016
  42. math

    how do I find out how many feet are in 36 yards? i know that 3 feet equals 1 yard. You can multiply 3 times 36 to find the number of feet in 36 yards. You need to learn how to set up your equation and you can convert anything to anything if you know the

    asked on August 2, 2007
  43. algebra

    I cant get this one nither I tried like 4 times to get right answer. 5x+12-3x=-2x-13-x x=-5 5x+12-3x=-2x-13-x First, let's get the unknowns on one side of the equation and the knowns on the other side. 5x - 3x + 2x + x = -12 - 13 5 x = -25 x = - 5 ok I

    asked on August 1, 2007
  44. Math

    Andrea needs 3/8 ounce of vanilla for her cookie recipe. If 1 milliliter is approximately 0.03 ounce, write an expression to determine the number of millimeters of vanilla Andrea needs for her cookie recipe.

    asked on May 2, 2016
  45. algebra

    the area of a square garden in square feet is 49x^%2-14x+1. Find the dimensions of the garden in terms of x. Factor 49x2 -14x + 1, it should be a perfect square.

    asked on May 22, 2007
  46. art apreciation

    the style ofart produced at the palace of versailles during the reign of king louis XV would today be called a. mannerist b. rococo C. baroque D. classical

    asked on November 26, 2010
  47. math

    a box is 11 inches tall, 2 inches deep, and 8 inches wide. What is the surface area of the box that is needed for the cereal

    asked on February 27, 2016
  48. government

    The Constitutional priciples of seperation of powers and checks and balances have resulted in frequent power struggles between the legislative and executive branches of government. Discuss the contemporary balance of power between the Congress and the

    asked on January 23, 2007
  49. Physics

    Your friend is an environmentalist who is living in a tree for the summer. You are helping provide her with food, and you do so by throwing small packages up to her tree house. If her tree house is 21 m above the ground, what is the minimum (initial) speed

    asked on September 23, 2014
  50. chemistry

    What does it mean when the sulfuric acid is written ABOVE the arrow in a reaction?

    asked on September 1, 2009
  51. History

    1. What motivated Bismarck to enact reforms in Germany? 2. What kind of reforms were inacted in Germany and Britian? My answers: 1. Bismarck wanted Germany to be more united and when nationalism spread through Germany it helped Germany become a leading

    asked on September 27, 2007
  52. management

    Describe the differences between the directional, portfolio, and parenting strategies. In addition, describe when you would use these major types of strategies.

    asked on November 10, 2009
  53. mathematics

    If 3/4 of a class is absent and 2/3 of those present leave the room, what fraction of the original class remains in the room? my book says.. if 3/4 are absent, 1/4 are present hows that so? then it says if 2/3 of the 1/4 present , 1/3 of the 1/4 remain

    asked on August 2, 2007
  54. arithmetic

    this is difficult for me... #5 A carpenter needs 4 boards, each 2 feet 9 inches long. If wood is sold only by the foot, how many feet must he buy? the answer is 11 but how do you get 11? You need to multiply 4 times 2 3/4 to find the total amount of board

    asked on August 1, 2007
  55. Psychology Statistics

    Many animals, including humans, tend to avoid direct eye contact and even patterns that look like eyes. Some insects, including moths, have evolved eye-spot patterns on their wings to help ward off predators. Scaife (1976) reports a study examining how

    asked on November 20, 2014
  56. Averages

    Find the average. 39, 47, 52 I got an answer of 46. Is this correct?

    asked on January 31, 2013
  57. history

    why did president harry truman fired general douglas macarthur from his command of american forces in east asia during the cold war?

    asked on April 9, 2010
  58. Writing a 2 column proof..

    I have no idea where to start! and I've got lots of these to write. Directions say write a two-column proof... Given: segment AB is congruent to segment XY, AC is is congruent to XZ, and BC is congruent to YZ. Prove: triangle ABC is congruent to triangle

    asked on November 11, 2009
  59. math

    bill is 2 years older than ted. in 5 years, 5 times ted's age will be 4 times bill's age. how old is ted?

    asked on October 10, 2007
  60. Economics

    What is the difference between a buyer's market and a seller's market? How can a buyer's market turn into a seller's market? In a buyers market, the buyers have all/most of the bargaining advantages. Buyers can often get the "proverbial" good deal. Sellors

    asked on March 26, 2007
  61. history

    First of the grate industrial trusts,organized through a principle of horizontal integration that ruthlessly incorporated or destroyed competitors. I am thinking the Standard Oil Company... The idea, promoted by Henry Grady and other boosters that the

    asked on March 20, 2007
  62. Help Math

    Events A and B are mutually exclusive. The probability of event A occurring is0.15; the probability of event B occurring is 0.45; what is the probability that A and B will occur? A.0.30 B.0.60 C.1 D.0.40 I think C am I correct?

    asked on December 30, 2012
  63. biochem

    When making Aspirin, I know that sulfuric acid is used as a catalyst. But i was wondering 1.) if the reaction would happen without the cataylst and 2.) can other substances be used as a cataylst in this reaction?

    asked on January 24, 2010
  64. Algebra

    Janet invested $26,000, part at 6% and part at 3%. If the total interest at the end of the year is $1,080, how much did she invest at 6%?

    asked on August 20, 2009
  65. Economics

    How can government interference create inefficient production? Use at least one example. I can think of a plentitude of ways. Think of government programs or actions that change market equilibriums. (three hints: tarriffs, price controls, special tax

    asked on March 26, 2007
  66. Economics

    1.) How do producers use market research to help maximize profits? 2.) Give two examples of companies that are characterized by a monopolstic competition market structure.

    asked on March 19, 2007
  67. french

    This is my last big french assignment before the exam but I need help translating the essay prompt: Dans toute societe il y a des gens et des entreprises qui vendent principalement des services au lieu de vendre des produits. Analysez une ou deux semaines

    asked on January 2, 2007
  68. chemistry

    In Flask A, you reacted 5.10 g Mg with 0.447 mol HCl. In Flask B, you reacted 24.21 g Mg with 0.998 mol HCl. Which ballon will inflate the most?

    asked on March 25, 2013
  69. PHYSICS!!

    a student pushes a 10 kg box across a warehouse floor. if the boz accelerates at 3 m/s/s and the force of friction is 20 newtons determine the size of the students applied force

    asked on March 14, 2011
  70. biochem

    Many of today’s antibacterial drugs work by interfering with the growth of cell walls, why do these drugs tend to have little toxic effect on humans?

    asked on September 28, 2009
  71. chem

    How many kilojoules of energy are released from the carbon carbon single bonds when Glucose (C6H12O6) is burned? how would i do this?

    asked on August 21, 2009
  72. math!

    (x-1)^2 + (x+2)^3 >= 0 hellppp?! how do i solveee?

    asked on August 13, 2009
  73. math

    A family drove 1080 miles to their vacation lodge. Because of increased traffic density, their average speed on the return trip was decreased by 6 miles per hour and the trip took 2.5 hours longer. Determine their average speed on the way to the lodge.

    asked on July 27, 2009
  74. Chemistry

    An indicator has the reaction HIn(aq)+In-(aq). Explain how the indicator can change color when a strong acid is poured into a solution of this indicator. Did you intend to write HIn(aq) H^+(aq) + In^-(aq) addition of H^+ from an acid causes the equilibrium

    asked on April 13, 2007
  75. Algebra

    I need help filling in the blank and answering the question. 1. If you move the two foci of an ellipse together so that they become a single point, then the ellipse will become a/an------. 2. What happens when the major and minor axes are exactly the same

    asked on March 20, 2007
  76. Algbebra 2

    How would I put this word problem into a system of equations (three equations)? Once its in equation form I can easily solve it... A natural food store makes its own brand of trail mix out of dried apples, raisins, and peanuts. One pound of the mixture

    asked on September 28, 2010
  77. economics

    What are the advantages and disadvantages of using a credit card? The good: Don't need to cary cash. Can buy needed goods on credit when you otherwise wouldn't be able to. The bad: Usually you pay high interest until the balance is zero. Most people are in

    asked on May 31, 2007
  78. Chemistry

    Why will a reaction that forms a very weak electrolyte not form an equilibrium reaction? Your preface is questionable. Do you have an example of one? All the weak electrolytes I can think of form in solution an equilibrium reaction. No the question did not

    asked on April 12, 2007
  79. english

    Write a compare and contrast essay that analyzes two different lifestyles: one of complete freedom, and the other which de-emphasizes individually in favor of a collctive social unit, such as the family, society, the government, or all of these. Ok so I am

    asked on January 17, 2007
  80. Chemistry Equation

    In a lab expirement you add copper(II)nitrate to pure zinc. Write a balanced equation for this expirement and predict if a reaction will occur. I THINK Bob Pursley answered this question a day or so ago. Zinc is higher in the activity series than copper;

    asked on January 6, 2007
  81. chemistry-Chemical Formulas And Reactions

    What is the balaced equation for the decomposition of aluminum chloride? 2AlCl3==> 2Al + 3Cl2 if it simply decomposes and nothing else is added.

    asked on January 4, 2007
  82. Chemistry

    SO3 + H2O = H2SO4 If you react 34 g of water and have excess SO3, how much H2SO4 would you theoretically produce

    asked on March 15, 2011
  83. chem

    What is the amount of energy released when 3 carbon carbon triple bonds are broken?

    asked on August 31, 2009
  84. equilibrium question

    For the reaction N2(g)+o2(g)2NO(g), you have the initial concentration [N2]=0.03 and [O2]=0.08 Keq for the reaction at this temperature is 5.7*10^-5. What are the equilibrium concentrations for N2, O2, and NO? Please help me with this!

    asked on April 13, 2007
  85. Chemistry

    If you have two solutions, one of pH 7 and one of pH 9, but they are not labeled, which indicator would be used to identify the two, methyl orange or phenolphthalein? The mid-point of the phenolphthalein indicator is about 9 (from 8.3 to 10) and the range

    asked on November 12, 2006
  86. Math

    To buy both a new car and a new house, Tina sought two loans totalling $319.531. The simple interest rate on the first loan was 2.7%, while the simple interest rate on the second loan was 2.6%. At the end of the first year, Tina paid a combined interest

    asked on January 11, 2012
  87. Math

    Solve using the elimination method. -3x+6y=-3 -6x+4y=-10

    asked on January 11, 2012
  88. Statistics

    Two ways in which practical statistics outweighs statistical significance?

    asked on November 22, 2010
  89. Geometry

    So are these the correct ordered pairs to the problems. Our teacher told us to find ordered pairs. 1. TX=2x+1,XW=x+7;TW 2. WX=x+5,TW=4x+5:TX 1. (1,8) 2. (3,17)

    asked on August 25, 2009
  90. chemistry

    Describe what happens to the shape and volume of a solid, a liquid, and a gas when you place each into separate, closed containers?

    asked on March 30, 2009
  91. literature

    In Agatha Cristie's And then there were none, how does she use suspence to further the plot? Oh, my! Have you read this story? Killing off the people one-by-one involves the reader and creates suspense as the reader knows that another character will be

    asked on August 7, 2007
  92. please help

    oook that site didn't help much I don't need to know how to suck up to my teacher. I need to know how to set up a ratio, can someone help me?? The format for ratios is # : # :: # : # Example 1: 2 :: 2 : ? 1 is one half of 2... so 2 would be one half of ?

    asked on August 1, 2007
  93. Physics

    A hockey puck slides with an initial speed of 48 m/s on a large frozen lake. If the coefficient of kinetic friction between the puck and the ice is 0.030, what is the speed of the puck after 11 s?

    asked on September 23, 2014
  94. english

    He was ____ in his pledge to complete the project on time and under budget. what word: implacable, disgruntle, or illusory?

    asked on October 17, 2009
  95. Solving Inequalities?

    Ive been having problems with this soo... My first problem is this: Solve 2x-4(x+2)-6 < 0 Can someone help me step-by-step figure this out so i can at least finish the ones that are similiar to this one? Thankies

    asked on September 3, 2009
  96. chemistryy

    What is the amount of energy released when a carbon carbon single bond is broken?

    asked on August 13, 2009
  97. math

    3x^(1/3) + 2x^(2/3) = 5 solve for x

    asked on August 4, 2009
  98. Chemistry (again)

    I need help with this question: Suppose you bake two cakes and the the one with twice as much baking powder raises twice as much. Is this proof of the relation between concentration and reaction rate? See I know concentration has an affect on reaction rate

    asked on April 23, 2007
  99. Music Question

    which would NOT be a compelling reason for teaching music? 1. Musical intelligence is an aspect of intelligence or 2. Parents expect schools to teach music Wouldn't it be number 2? There are cognitive and non cognitive aspects of intelligence. The

    asked on April 2, 2007
  100. history

    hi, i really need help by the end of the day. an improved type of fencing that enabled farmers tp enclose land on treeless plains barbed wire??

    asked on March 28, 2007


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