Questions Asked on
May 13, 2009

  1. chem/solubility

    the Ksp of CaF2 = 1.46*10^-10 and Ka of HF = 3.5*10^-4 Calculate the pH of a solution in which the solubility of CaF2 = .0100 moles/liter. so Ksp =[Ca2+][F-]^2 and Ka =[H3O+][F-]/[HF] I'm not sure how to continue...

    asked by Natash
  2. English

    Which sentence is Vague pronouns 24a. When the car hit a tree, it made a terrible noise. 24b. The car made a terrible noise as it crashed into a tree.

    asked by Marie
  3. English

    1. My favorite class is math class. 2. My favorite class is a math class. 3. My favorite class is the math class. (Which one is correct?)

    asked by John
  4. General Science

    Surface water is important because it? 1. furnishes plants with water 2. provides a supply of drinking water 3. contributes to the water cycle 4. supplies water to rivers during dry periods

    asked by Anonymous
  5. pre-calculus

    How do you write the standard form of the equation of the line passing through the points M(-4,-2) and N(4,7)? How do you find the slope-intercept form of the equation of the line passing through the points P(2,-9) and Q(3,-7)?

    asked by maxine


    asked by JASON
  7. finance

    Collins Office Supplies is considering a more liberal credit policy to increase sales, but expects that 9 percent of the new accounts will be uncollectible. Collection costs are 5 percent of new sales, production and selling costs are 78 percent, and

    asked by melissa
  8. Algebra

    In triangle PQR shown, point S (not shown)is on QR between Q and R. Give one possible value for the length of PS ...Explain your reasoning.. Triangle PQR = 13" PQ = 6" QR = 2" PR = 5" I need help in figuring this out this triangle with an equation or

    asked by JAY10
  9. math

    solve logb6

    asked by Sarah
  10. history

    how has us relationship with china changed over last 60 years?

    asked by brenda
  11. spanish

    "¿Qué prefieres, una corbata a rayas o una floreada?" "_____" a. me da igual b. por todas partes c. es de lona d. es mediano A

    asked by y912f
  12. math

    how do i simplify 3 16/12

    asked by patty moss
  13. chemistry

    Does the complex ion [Co(en)2Cl2]^+ have cis-trans geometric isomers?

    asked by Eliz
  14. spanish

    Este cinturón me queda apretado. Voy a ver si lo tienen en _____ grande. a. bolso b. tamaño c. suelo d. manga B?

    asked by y912f
  15. research writing

    How do you plan to support your thesis with compelling arguments and counterarguments? My thesis statement: Teenage Depression and Suicide

    asked by missy
  16. spanish

    what are some breakfast meals in spanish

    asked by tim
  17. marketing

    I need a better understanding please. what is 2 external influences? Think of a product that you have seen advertised on television, a magazine, or on the radio. Describe the product and identify two external influences that might lead a person to purchase

    asked by scooby9132002
  18. Chemistry

    if you had a complex ion [Mn(NH3)2(H2O)3(OH)]^+2 would the oxidation state of the metal atom be 5 and what would be the charge on the complex if all ligands were chloride ions

    asked by Anonymous
  19. Chemistry

    if you had this complex ion [CoF6]^-3 would this ion absorb red or blue color and would you expect this complex to be high or low spin.

    asked by Eliz
  20. social studies

    how can we save the arctic ice melting?

    asked by priya
  21. Math[kind of]

    If there are 50 questions on a test and 19 are missed, what would be the grade? How would I solve this? Thanks -MC

    asked by mysterychicken
  22. Grammar

    What best describes the phrase in CAPS? A pair of muddy shoes in the hallway told me THAT ERIC WAS HOME. Ans- I think this one's either an adverb clause or a noun clause. Please help; thanks! -MC

    asked by mysterychicken
  23. Grammar

    Which choice correctly completes each sentence? 1.Quickly, they ________ all the grocery bags on the floor and ran outside. A.had setted B.set C.sat D.had sat B 2.The travelers _______ us every day this week. A.have wrote B.have written C.have wroten

    asked by mysterychicken
  24. Science

    Which one of the following is an example of a parasitic animal? A) Tapeworm B) Grasshopper C) Termite D) Ant

    asked by Anonymous
  25. Economics

    Why does the US need a single banking system to help organize its financial structure?

    asked by Gee
  26. General Science

    Cheese is a good source of; water, sugar, starch, protein

    asked by Anonymous
  27. Chemistry Help?

    30, A: One atmospheric compound is responsible (after it has dissolved in water) for both the general acidity of normal rainwater and the acidity of much soil. What is this compound? 30, B: Is this compound put into the atmosphere solely by pollution? 30,

    asked by T. White
  28. math

    5^x = 1.4

    asked by Sarah
  29. latin

    Odii servitutem? would that translate to hatred of slavery?

    asked by marcus
  30. Psychology/270

    Okay I will try this again, I was wondering if this assignment looks correct. It is just asking to fill in the blanks, so I will just put what I came up with. This is already here I have to match the Psychologist and the treatment to scenario Willard has

    asked by Sassy
  31. Psychology/270

    Okay I will try this again, I was wondering if this assignment looks correct. It is just asking to fill in the blanks, so I will just put what I came up with. This is already here I have to match the Psychologist and the treatment to scenario Willard has

    asked by Sassy
  32. Math

    3^x-2 = 9^x+4

    asked by Sarah
  33. Business Accounting

    why does the bank tell you they are "crediting" your account when they increase it and "debiting" your account when they decrease it? I know this is a simple question but I just want to make sure I am currect with my answer before I post it to my class

    asked by Anonymous
  34. criminal justice

    should policing continue with the way it is going; be integrated with the past policies; or be completely reformed again

    asked by quababee
  35. criminal justice

    what aspects of the previous eras would be beneficial today?

    asked by quababee
  36. Algebra 2 - stats and probability

    I need someone to tell me how to set these up please? 1. A box contains 4 quarters. 2 of the quarters have the American eagle on the back. Suppose you draw 2 quarters at random with replacement. a. What's the probability that both have the American eagle

    asked by Kay
  37. Chem - IUPAC naming system

    I don't know how to name this. Help? You'll have to write out what I'm describing because I can't set it up in this. In a straight line, there is (1)CH3 - (2)C - (3)CH2 - (4)C - (5)CH - (6)CH3. On #2, there is CH3 and CH3. On #4, there is CH3 CH3 and CH3.

    asked by Kay
  38. Grammar

    Need help with these- Choose a label that best describes the phrase in CAPS: 1.Two small round tables sat OUTSIDE THE BACK DOOR. Ans-I think this one is either an appositive phrase, or an adjective phrase. 2.Finally, they decided on checkers, AN OLD

    asked by mysterychicken
  39. Grammar

    What kind of clause is the phrase in CAPS? His brow furrowed AS HE HEARD THE PUZZLING NEWS. Need help with this! Thanks -MC

    asked by mysterychicken
  40. To Marcus - re Latin

    asked by Writeacher
  41. model

    for my mosque model project(i posted yesterday) i have decided to use something unusual. i'm going to make my model out of cake, and use different color frostings, candies, and other decorations on it. i'm posting this because i just want to know if anyone

    asked by y912f
  42. Chemistry

    N2H4(g) + H2(g) 2 NH3(g) H1 = –1876 kJ 3 H2(g) + N2(g) 2 NH3(g) H2 = –922 kJ The H f for the formation of hydrazine: 2 H2(g) + N2(g) N2H4(g) will be ______ kJ/mol

    asked by Tylor
  43. Chemistry

    An element has hcp packing with a hexagonal unit cell. Its density is 4.5 g/cm3 and the unit cell volume is 3.53 x 10-23 mL. Calculate the molar mass (g/mol) of the element to three significant figures.

    asked by Linda
  44. math

    You are chosing between 2 health clubs. Club A offers a membership for $16 plus a monthly fee of $26. Club B offers a membership for $19 and a monthly fee of $25. How do i figure out when the costs will be equal and what each cost of the clubs are?

    asked by Joe
  45. Chemistry, Urgent!

    How is this question solved?! When 21.6g of a metal X are burned in excess oxygen, 40.8g of X2O3 are formed. From this data, what is the metal X?

    asked by Kearstyn
  46. statistics

    i am working out of the statistics in action text book and i need help with chapter 9 e39-e47 odds i do not understand it

    asked by kolbey
  47. English

    Which sentence is Vague pronoun 25a. Air pollution normally increases along with population growth. This increasing pollution is a big problem for many cities. 25b. Air pollution normally increases along with population growth. This is a big problem for

    asked by Lisa
  48. chemistry

    as the pressure increases, the volume______, and as the pressure decreases the volume ________. fill in the blanks is it decrease then increse

    asked by melissa
  49. math

    How do you round to the nearest nonzer place? 0.64 159.45

    asked by Sam
  50. Physics

    My problem is as follows: A 12 kg pail hanging on a rope is pulled up by a 1 HP motor. What's the max. speed the pail could have? Do I use the formula Power = force * velocity or am I way off track?

    asked by Brigid
  51. 4th grade alliteration

    I need an alliteration about a cat.

    asked by Chelsea
  52. Math

    How do i solve the functions domain, range, x intercept and y intercept for this function..there is a a shaded dot on (-4,-4) and then theres a curved line going up to an unshaded dot on (0,0)

    asked by Fred
  53. 7thgrade

    ok ify-45 when x-15 find x when y =15

    asked by kailah
  54. Art.....Mona Lisa

    How does the Mona Lisa serve as an example of art?

    asked by Anonymous
  55. math

    how would you simplify this ((x^2+2xy+y^2-16)/(16x^4-16y^4))/((x+y-4)/(4x^2+4y^2))*((x+y)/(x+y+4))

    asked by mike
  56. English

    Is Mating Ritual in a sentince a proper noun? Like in a report, would it be capitalized?

    asked by Dawn
  57. Grammar

    Are these correctly answered?- Choose the answer that best completes the sentence: 1.Painting the door in the storage area were Lizzie and ______ A.she B.her C.them A 2.Each of the boys had prepared _____ remarks well. A.his B.their A 3.Carefully

    asked by mysterychicken
  58. social

    explain the duties and responsibilities that guided people live in medieval europe

    asked by Anonymous
  59. math

    How do i solve the functions domain, range, x intercept and y intercept for this function..there is a a shaded dot on (-4,-4) and then theres a curved line going up to an unshaded dot on (0,0), it also has to be interval notation but im not sure how to do

    asked by Fred
  60. spanish

    "Voy a pasar las vacaciones de invierno en chicago. ¿Qué ropa debo traer?" "Hace mucho frío allí. Debes trare _____" a. un chaquetón y unos botines b. zapatos de tacón y un bolso c. una cartera y un pañuelo d. unos botines y una corbata A? "¿Cómo

    asked by y912f
  61. French

    How do you say the country Zaire in French?

    asked by Angie
  62. Math

    how do you add the following fractions. (X^2-6x)/(x^2+7x)+(x^2+5x)/(x^2+7x)? what do you get when you simiplify it because i have no idea how to :(

    asked by James
  63. research paper

    How do I make an MLA style citation?

    asked by Laural CHHA
  64. Physics ~ important due tomorrow!

    A student sets up a laser and screen and a single slit and observes the diffraction pattern. They then replace the single slit with a double slit (the separation of the double slit is exactly the width of the single slit). No other changes are made. What

    asked by Sam
  65. math

    solve for x 12(x+4)=7x-3

    asked by johnny
  66. 8th grade

    why were the elections to unite Vietnam in the mid 1950s never held?

    asked by Billy
  67. Chemistry

    How many grams are there in 2.3 ¡Á ¡¼10¡½^24 atoms of silver?

    asked by Taylor
  68. global

    describe the roles that individual citizen played in the medieval system.

    asked by Anonymous
  69. Math

    How do i solve the functions domain, range, x intercept and y intercept for this function..there is a a shaded dot on (-4,-4) and then theres a curved line going up to an unshaded dot on (0,0), it also has to be interval notation but im not sure how to do

    asked by Jon
  70. Math

    I am having probles with solving systems of equations by graphing please help!! y=4+2/3x 2x=3y

    asked by Gaby
  71. social

    how manorialism provided people with their basic economic needs(western europe)

    asked by Anonymous
  72. General Science

    Is chlorophyll produced by green plants?

    asked by Anonymous
  73. math

    (7p+5)(8p-5) its distribuctive property

    asked by jennifer
  74. math

    The box has 18 pencils.Divide the box into sixths. 1/6 of 18=? Now do I divide the box in single rows of six and each row there's three pencils? and my answer is 6? Thanks liz.

    asked by liz
  75. Grammar

    Type the word that has been incorrectly capitalized or needs to be capitalized: 1.Pardon me, Captain, but have you had some of the russian caviar? Ans- Russian 2.The blue waters of San Francisco bay signaled our entry into California. Ans- Bay 3.Cross the

    asked by mysterychicken
  76. math

    what portion of the years total reinfall fell during the first four months of the year? write two different fractions which are each a correct answer to the questions.

    asked by renee
  77. history

    describe the changes that occurred in europe during the renaissance

    asked by Anonymous
  78. Biology

    What two species belong to the Pseudocolochirus Violaceus(violet sea cucumber)?

    asked by B.B.
  79. Biology

    What two species belong to Acanthaster Planci (crown-of-thorn-starfish)?

    asked by B.B.
  80. Grammar

    Which sentence contains an error in the use of end marks or commas? A.We will be reading a novel, written by Charles Dickens. B.For a few foolish moments, I actually thought I could catch the falling vase. C.On page 37, four charts clearly detail the

    asked by mysterychicken
  81. Biology

    What kind of plant life, animal life and geology of the ecosystem is in Indiana?

    asked by B.B.
  82. science

    MY QUESTION IS: how do adaptations enable organisms to reduce competition for food and other resources? thank u please respond before 9

    asked by elenny
  83. bonds, present value concept

    If we do not use the present value concept, what impact would it have on the financial statements?

    asked by kathy
  84. resaerch writing

    My thesis statement is Teen Depression and Suicide. How do you plan to support your thesis with compelling arguments and counter arguments?

    asked by missy
  85. 6th grade math

    How many oz are in 12 cups

    asked by Peyton
  86. Enlgish

    1. What was your parents' dream? 1-1. They all wanted to be a singer. 1-2. They all wanted to be singers. (Which answer is correct? Do I have to use a singular noun or a plural noun?) 2. What did you give to your parents on Parents' Day? 2-1. I gave them a

    asked by John
  87. 5th Grade Writing

    I need to write 3 paragraphs, 5 sentences each (at least on how stone is useful. Could anyone give me some topics?

    asked by Anya
  88. religions

    please tell me some good links where i can find information about Zubair bin Awwam thanks

    asked by y912f
  89. Writing

    What is the difference between I look forward to hearing from you. I am looking forward to hear from you. Which one is better if you are including it in a letter and expecting a reply?

    asked by Sam
  90. pre-calculus

    How do you write the standard form of the equation of the line passing through the points M(-4,-2) and N(4,7)? How do you find the slope-intercept form of the equation of the line passing through the points P(2,-9) and Q(3,-7)?

    asked by maxine
  91. Chemistry

    1. How do intermolecular forces differ in different alcohols? 2. Why does oxaloacetic acid has a higher Ka than succinic acid? a. fewer carboxyl groups b. a less polar structure c. addtional functional groups that make it more soluble in water d. fewer

    asked by anonymous
  92. French

    Can someone please proofread my paragraph? Sortir Diner Je suis allé à un restaurant chinois. Je suis allé avec ma famille. C’été un traditionnel repas de Noël famille. Pour hors d’oeuvre, j’ai mangé (Egg Drop Soup). Pour le plat principal,

    asked by Larry
  93. Chemistry

    1. What is plastic bags composed of? (polymers or something like that?) 2. What properties do they have? Thank you!

    asked by anonymous
  94. critical thinking

    According to Courtwright, criminal rates were exceedingly high in the nineteenth century before TV, movies, and rap videos had been created.What were some of the other factors that provoked violence? Do you think that these factors still cause violence

    asked by melissa
  95. Grammar

    Please check these- 1.Of the three brothers Jason drives ________. A.more carefuller B.most carefully C.most carefullest D.the carefullest B? 2.Rick is the _______ tennis player of the twins. A.better C.gooder D.goodest A Thanks -MC

    asked by mysterychicken
  96. help

    All right-thinking people will support the Board of Education's decision to destroy novels in the school libraries that are offensive to the moral standards of the community. If there were an epidemic of typhoid, the health authorities would be expected to

    asked by Anonymous
  97. English

    1. Is Jinny a female name or a male name? 2. Who is running over there? Marathon runner, Tom White is. 2-1. Who is running over there? The marathon runner, Tom White is. 2-2. Who is running over there? A marathon runner, Tom White is. (Which one is right

    asked by John
  98. physics

    Party hearing. As the number of people at a party increases, you must raise your voice for a listener to hear you against the background noise of the other partygoers. However, once you reach the level of yelling, the only way you can be heard is if you

    asked by Chirayu
  99. Physics

    A point source of light is 96.7 cm below the surface of a body of water. Find the diameter of the circle at the surface through which light emerges from the water. Water has an index of refraction of 1.33.

    asked by Chirayu
  100. chem

    the pH of a .100 M solution of sodium formate = 8.37. Calculate the value of Ka of formic acid. okay so I know that the anion of a weak acid is itself a weak base so A- +H2O---> OH- + HA pOH =14-8.37 so conc of OH is 10^-5.63 Ka=[OH][HA]/[A-] so we know

    asked by Natash
  101. English

    I have two dice. I will roll the dice and according to the numbers on the faces of the dice, you should solve each problem in the space. (After rolling the dice). I got 1 and 7. Who is # 17? Stand up and solve the first problem in the first space on the

    asked by John
  102. math - 5th grade ratios

    The ratio for makig 4 gallons of light yellow paint is 1 gallon of white / 3 gallons yellow. Find the ratio for making 20 gallons of light yellow paint.

    asked by ImLost
  103. Algebra

    A soda cost A cents for each bottle, including the deposit, but there is a refund of B cents on each empty bottle. How much must you pay for X bottles if you bring back Y empties? I need to know how to write an algebra Equation/Expression to solve this

    asked by Mike 50
  104. Biology

    What two orders belong to the Asian fairy bluebird?

    asked by B.B.
  105. Biology

    What two orders belong to the red eyed vireo?

    asked by B.B.
  106. Chemistry

    If 25.0mL of sodium nitrate solution (0.100mol/L) is added to 10.0mL of sodium carbonate solution (0.150 mol/L), what is the concentration of sodium ions in the resulting mixture? Assume the volumes are additive.

    asked by Tom
  107. 11th Grade chemistry

    How to get pure gold from impure gold..please specify the chemical equation.. any example is fine,e.g. AuCl3 -> Au

    asked by Luke
  108. chemistry

    Why are KMnO4 filtered before they are standardized?

    asked by angel
  109. chemistry

    Why are standard KMnO4 solutions are seldom used for the titrations of solutions containing HCl? 2. Why are standard solutions of reductants less often for titrations than standard solutions of oxidants? 3. When a solution of KMnO4 was left standing in a

    asked by angel
  110. Chemistry

    If you had this complex ion [CoCo3(NH3)4]^+, where the CO3^-2 is a bidentate ligand. what is the oxidation state of the cobalt and would this complex ion be octahedral or square planar.

    asked by Anonymous
  111. Grammar

    Which word(s) does the clause in CAPS modify? 1.Will you wait UNTIL MR.HAMILTON RETURNS? B.Will wait C.wait B? 2.Our music teacher, Mrs.Goode, offered a solution that SURPRISED US ALL. A.teacher B.Mrs.Goode C.solution D.offered C Are these

    asked by mysterychicken
  112. Chemistry

    . . S H H B: What kind of three-dimensional geometry would this molecule have? C: Would this molecule be polar or nonpolar? Explain your answer. - B: “Triangular Planar”. C: I've tried to answer this question. I know a polar bond is when the

    asked by T. White