Questions Asked on
March 20, 2015

  1. Chemistry

    How do I determine the quantity (g) of pure MgSO4 in 2.4g of MgSO4.7H2O

  2. math

    Solve the following ordinary differential equations. I) (2y+x^2+1)dy/dx+2xy-9x^2=0 ii) d^2/dx^2+3day/DX+2y=x^2

  3. Arithmetic Reasoning

    A team won 8 of the 24 games it played in one season. What percent of games did it win?

  4. Help ms sue or whoever smart as history

    In the 1800s, it was believed women were good at working on projects to improve the community because (5 points) women were better leaders than men. women were better planners than men. women were more emotional than men. women were more moral than men. 2.

  5. Science

    A liquid solution of formaldehyde is 37% pure. This solution has a specific gravity of 1.037. The molecular weight of formaldehyde is 30.0. To 1.00 ml of this impure stock solution is added quantity sufficient total the total volume to 500 ml. If 1.00 ml

  6. Spanish

    Hola Sra. Do these look ok? Part I Complete el párrafo por llenar los espacios en blanco con la forma correcta de los verbos entre paréntesis. ¡OJO ! No todos requieren el subjuntivo. Hoy martes estoy en el aeropuerto y tengo que pasar la aduana. El

  7. physics

    A 20.0 kg box slides down a 12.0 m long incline at an angle of 3.0 degrees with the horizontal. A force of 50.0 N is applied to the box to try to pull it up the incline. The applied force makes an angle of 0.00 degrees to the incline. If the incline has a

  8. Trigonometry

    A vertical pole 35m high, standing on sloping ground is braced by a wire which extends from the top of the pole to a point on the ground 25 m from the foot of the pole. If the pole subtends an angle of 30 degrees at the point where the wire reaches the

  9. Social Studies

    What two ancient civilizations had the most similar religious beliefs/ A. Greek and Persian B. Roman and Greek C. Chinese and Roman D. Persian and Chinese I pick B is this correct

  10. math

    A box contained some red, blue, and green markers. For every 5 red markers, there were 2 blue markers. For every 3 blue markers, there were 5 green markers. a.​​Find the ratio of red markers to blue markers to green markers. b.​When 6 red markers

  11. Advanced Algebra

    The arithmetic progression has first term 4 and last term 34. If the sum of its terms is 247, find the number of terms and their common difference.

  12. math

    A conducting rod of mass 30 g and length 48 cm has holes drilled near each end so that it is free to slide in a vertical direction along two conducting rails as shown in the figure below. A current of 240 A is made to flow through an identical rod at the

  13. Tsi math

    A rectangular room measures 20 by 7 feet Find the cost of installing a strip of wallpaper around the room if the wallpaper costs $0.98

  14. Math

    Connie made deposits of $2000 at the beginning of each year for four years. The rate she earned is 5% annually. What is the value of Connie's account in four years?

  15. English

    List three examples of dramatic or situational irony in Animal Farm, then state what is really meant in the passage or what actually happens in the plot. Dramatic irony: 1. Some characters in the book Believe Boxer was taken to the hospital, and died there

  16. Economics

    1. What determines the size of the key-money payments that landlords demand (and tenants offer) for the right to rent a controlled apartment? 2. Who, other than the owners of rental units, loses as a result of rent controls? Who gains from rent controls?

  17. geometry

    In triangle ABC, the measure of

  18. Pre-Algebra

    Equation M: y = 3x + 4 Equation P: y = 3x + 7 Which of the following options is true about the solution to the given set of equations? No solution One solution Two solutions Ininite solutions I thought it was infinite solutions but i got the answer wrong.

  19. science

    I'm doing a lab for Le Chatelier's Principle. I'm concerned that all my answers sound very similar. Can someone help me and let me know if my answers are making sense? ~Thanks 1.) How is the reaction Zn(OH)2 Zn^+2 + 2OH- affected by adding OH- I think

  20. Chemistry

    A solution is made by mixing 5.00 × 102 mL of 0.167 M NaOH with 5.00 × 102 mL of 0.100 M CH3COOH. Calculate the equilibrium concentrations of H+, CH3COOH, CH3COO−, OH−, and Na+.

  21. Math

    1. A carton contains b boxes of paper plates, and each box contains n plates. If the carton costs c dollars, what is the cost per paper plate, in dollars, when the plates are bought by the carton? a. cbn b. c/bn c. bn/c d. cn/b e. n/cb I do not know which.

  22. Health & PE One Question PLEASE ANSWER!

    For drivers over 21 years of age DWI or DUI is defined as a. A BAC of 0.08 or higher b. A BAC of 0.10 or higher c. A BAC of 0.20 or higher d. any amount of alcohol in the blood Thanks!

  23. math

    Sam had 80 foreign stamps and local stamps. After giving away13of his foreign stamps and 10 local stamps, he had an equal number of foreign stamps and local stamps left. How many local stamps did he have in the beginning?

  24. chemistry

    Consider the following reaction. SO3(g) + H2O(l) → H2SO4(aq) A chemist allows 60.9 g of SO3 and 11.1 g of H2O to react. When the reaction is finished, the chemist collects 54.4 g of H2SO4. Determine the limiting reactant, theoretical yield, and percent

  25. Science

    A switch is closed, a lamp turns on. The switch opened, and the lamp turns off. What does that suppose to mean..?

  26. Biology

    I need some help with these questions. I've chosen answers, but I want to make sure if they are correct. 1)Which of the following is an acidic pH? 6 7 8 800 A: 6 None of the above ------------------------------------- 2) Which of the following is directly

  27. Math

    a horse race has 14 entries and one person owns 3 of those horses. assuming that there are no ties, what is the probability that those three horses finish first, second and third?

  28. physics

    A long solenoid that has 990 turns uniformly distributed over a length of 0.410 m produces a magnetic field of magnitude 1.00 multiply.gif 10-4T at its center. What current is required in the windings for that to occur?

  29. physics

    for long distance transmission of electricity, voltages of 1- 26 kv at the generator are stepped up high levels, 230-768 kv. in stepping up from 1 kv to 768 kv, if there are 200 turns of transformer wireon the primary, how many turns will the secondary

  30. Chemistry

    1.) Explain the similarity between Mg(OH)2 and Zn(OH)2 in particular why would any insoluble hydroxide tend to dissolve in an acidic solution? Are they both bases? 2.) Explain the difference in particular how does Mg^+2 appear to form complex ions with

  31. Chemistry- Electrochemistry

    Calculate the activity of KI, x, in the following electrochemical cell if the potential is +0.294 V Ag | AgCl(s),NaCl(aq,0.1) ||KI(aq, x),I (s) | Pt

  32. math

    building A is 180 feet shorter than building B. The total height of the two building is1480 feet. find the length of each building

  33. History

    The Transcendentalism movement most directly affected the development of American politics literature popular culture painting and sculpture Is it c. Pls help me ms sue or dr.bob or steve or anyone pls help me

  34. math

    An object of mass 100g is thrown vertically upward from a point 60cm above the earths surface with an initial velocity of 150cm/sec. It rises briefly and then falls vertically to the earth, all of which time it is acted on by air resistance that is

  35. Science

    A parallel connection of several lamps in a home allow you to control each lamp independently with switches. How is this possible?

  36. chemistry

    what is the strongest intermolecular force in nitrogen trifluoride

  37. statistics

    Average entry level salaries for college graduates with mechanical engineering degrees and electrical engineering degrees are believed to be approximately the same. A recruiting office thinks that the average mechanical engineering salary is actually lower

  38. math

    Trent wants to build a rectangular pen for his animals. One side of the pen will be against the barn; the other three sides will be enclosed with wire fencing. If Trent has 400 feet of fencing, what dimensions would maximize the area of the pen?

  39. earthquake engineering

    Hey everybody! I have a question I would like to share and ask you. We have a soil layer with medium gravel which has a depth of 38 m. We want to build a multi storey framed building safely with a fundamental period of 1.7 sec.Do you think it will be safe?

  40. English

    I was just given this sheet in class and my teacher didn't help me at all.. She seems more concerned with her phone than teaching the class.. can someone help me do a few of these so I can understand? all prepositional phrases in parentheses. Underline the

  41. chemistry

    If you dissolve 3.5 moles of CaCl2 in a solution, how many moles of C+2 ions and C- ions will there be in the solution?

  42. Biology

    3) For each of the following characteristics, will the migration of the protein speed up, slow down, or remain unchanged if you do not add SDS? a)increase molecular weight of protein b) increase concentration of acrylamide c)decrease charge on protein d)

  43. chemistry

    A proton in a linear accelerator has a de Broglie wavelength of 138pm . What is the speed of the proton?

  44. Chemistry

    If you measure 2.0 g of ethanol (CH3CH2OH) and add enough water to make 250 mLs (exact amount), what is the molarity of the ethanol in the final solution?

  45. Chemistry

    If you take 3 mLs of a solution that is 4M acetic acid and add enough water to it to make 50 mLs, what is the molarity of the final solution? Thank you!

  46. Biology

    What does b-mercaptoethanol do to secretory proteins?

  47. math

    My car gets 26 miles per gallon, I have to drive 36 miles, gas price is $3.10 per gallon. How much money will I need?

  48. Social Studies

    Which of the following was not a goal of the New Deal? a Bring relief to the poor and unemployed b help recover the economy c end workers strikes c enact permanent reforms to prevent future economic depressions***** Which of the following best describes

  49. Flowcharts and pseudocode

    Create a class whose main method creates three arrays. The first array will contain five kinds of flowers - petunia, pansy, rose, violet, and carnation. The second array will contain the cost of each flower, respectively, 50 cents, 75 cents, $1.50, 50

  50. physics

    A 47.5-turn circular coil of radius 5.15 cm can be oriented in any direction in a uniform magnetic field having a magnitude of 0.490 T. If the coil carries a current of 22.9 mA, find the magnitude of the maximum possible torque exerted on the coil.

  51. physics

    A 25.0 g silver spoon at 20.0 C is placed in a cup of coffee initially at 90 C. How much heat does the spoon absorb from the coffee as the spoon warms up to 89 C? (C Silver - 230 J/kg C) Show all work.

  52. physics

    small toy car draws a 0.50mA from a 3.0 V nickel-cadmium(NiCd) battery. In 10 min of operation, (a) how much charge flows through the toys car? (b) How much energy is lost by the battery?

  53. Language Art

    How do poets use denotation and connotation? Please help! Thanks.

  54. math

    Mr Jacob has twice as much money invested at 5% simple annual interest as he does at 4%. If his yearly income from the two investment is $126, how much does he has at each rate?

  55. math

    June has twice as much money invested at 5% simple annual interest as she does at 4 %. If her year income from the two investment is $315 how much does she have at each rate?

  56. math

    Beans meal is 16% protein flour meal is 8% protein. How many pounds of each should be mixed together to get 32 pounds mixture that is 13% protein how many pounds of the flour meal should be in the mixture

  57. math

    Seven people rowed 12 miles downstream with the current in 1.5hrs. Coming back upstream against the current covered the same distance but took 4 hours. Find the people rowing rate in the still water and the rate of the current

  58. math

    Mary and John are 128 miles apart. A car leaves Mary traveling towards John and another car leaves John at the same time traveling towards Mary. The car leaving Mary averages 10 miles per hour more than the other car and they meet after 1 hour and 36

  59. math

    A store mixes peanuts worth $10 per pound and biscuit worth $13 per pound. The mixture is to sell for $12 per pound. Find how much of each should be used to make a 432 pound mixture.

  60. Chemistry

    If 2.50 mol. of sodium chloride was required to make up a solution of a particular concentration, what mass would need to be measured out?

  61. physics

    A camera with a lens of focal length 10 cm takes a picture of a 160 cm girl standing 24.0 m away. What is the approximate height of the image?

  62. English 2

    Which statement does NOT describe a major difference between Franklin’s and Cisneros’ life and writing goals? A. He records his own life and she documents the lives of her and her community. B. He wants to achieve moral perfection and she wants to

  63. English

    I cannot figure out to cite this website in easybib? Why the Midwest rules on the sat

  64. College Math

    An open-topped rectangular box is to be constructed from a 24 inch by 36 inch piece of cardboard by cutting out squares of equal sides from the corners and then folding up the sides. What size squares should be cut out of each of the corners in order to

  65. English

    I have question to do I have reword sentence because it give the definition for food the Goetta, which is made from mixed pork, beef, oaks and seasonings, packaged into a roll and then fried and severed hot. I don't want it to turn up as plagiarism in my

  66. Life orientation

    List two ways in which sport can support nation building

  67. Philosophy

    Does Rene Descartes provide a persuasive reply to the challenge of skepticism?

  68. Chemistry

    0.5g sample of bronze containing Zn is dissolved in 100ml of acid. An aliquot of 25ml requred 10.25ml of EDTA. What is the percentage of zinc in the bronze sample?

  69. Sci

    Which has minimam pkb

  70. Chemistry

    Suppose that a mixture of ice and water is placed in a refrigerator that is held at the freezing point of water, exactly 0.0C. Calculate deltaS for the ice-water mixture, deltaS for the refrigerator, and deltaStotal when 5.00g of ice forms. Is this process

  71. math 5th grade

    A snail is crawling up the side of a wall that is 3 meters high. Each day, he crawls up 40cm. The first night, he slips back down 2cm; the second night he slips down 4cm; the third night he slips down 6cm; and so on at the same rate.(He was getting more

  72. economics

    Samantha Roberts has a job as a pharmacist earning $30,000 per year, and she is deciding whether to take another job as the manager of another pharmacy for $40,000 per year or to purchase a pharmacy that generates a revenue of $200,000 per year. To

  73. pre-calculus

    Use the rational root theorem with polynomial division if needed to find all the zeroes of: P(x)=2x^4-3x^3+3x^2+5x-3.

  74. English

    Hello. I am having trouble writing an essay for this topic: What is the importance of taking advice and suggestions from others? I was wondering if someone could give me some tips and some inspiration on how to write this. I'am still stuck on the

  75. Chem

    Calculate the Keq of the reversible reactions Cr2O7 + 2OH -> CrO4 + H2O and 2CrO42->Cr2O72 , given the following data: HCrO4 -> H + CrO42 K = 3.2 x 10^-7 2HCrO4 -> Cr2O72 + H2O K = 34 H2O -> H+ + OH- K = 1 x 10^-14 HCL and NaOH = 1M KCrO4 and KCr2O7 = 0.1M

  76. chem

    . Antimony pentachloride decomposes according to the following equation. SbCl5 (g) → SbCl3 (g) + Cl2 (g) Suppose that 10.0 g of antimony pentachloride is placed in a 5.00 L container and allowed to establish equilibrium. Calculate the concentration of

  77. Algebra

    A number of students are planning an end semester party that is projected to cost $224.00. when six students decided to join in at the last minute, this reudced the contribution by $4.80 for each participanting student. how many students were there

  78. Algebra

    The speed of a boat in still water is 20 mph. It travels 24 mi upstream and 24 mi downstream in a total time of 10 hr. what is the speed if the current?

  79. math

    Silvia has twice as much money invested at 5% simple interest as she does at 4%. If her yearly income from the two investments is $266, how much does she has at each rate? 4% = 5% =

  80. English

    For a in -citation did you put last name in quotes like this (Mary)

  81. pre algebra

    all 500 students at robinson junior high were surveyed to find their favorite sport how many more students played baseball than soccer soccer is 10% basketball is 27% football is 38% baseball is 25% a. 50 students b. 175 students c. 75 students d. 125

  82. physics

    an aluminium sphere of 20cm diameter is heated from 0¡ãc to100¡ãc. what is the change in its volume?

  83. maths

    A rectangular plate has a length of (18.0 ± 0.2) cm and a width of (9.8 ± 0.1) cm. Calculate the area of the plate, including its uncertainty. Correct all results to significant figures. Please help someone

  84. economics

    Samantha Roberts has a job as a pharmacist earning $30,000 per year, and she is deciding whether to take another job as the manager of another pharmacy for $40,000 per year or to purchase a pharmacy that generates a revenue of $200,000 per year. To

  85. English

    How do in-text citations?

  86. Social Studies

    Can you check my answer? 2. Legend says that the emperor Nero played a fiddle miles from Rome while the city _______. burned **my answer** flooded starved rebelled

  87. math

    3/5 of the people at a funfair were children. 3/4 of the remaining people were men. There were 140 more children than women. How many people went to the funfair?

  88. Spanish Homework

    Hi! Can someone help check these for me? Thanks a bunch! :) Directions: Find the correct verb tense for each sentence. Choose from present, preterite, imperfect, future, conditional, subjunctive, past subjunctive, present perfect, past/preterite perfect,

  89. English

    Several of the characters in The Odyssey experience conflict. List three characters, state a conflict of theirs and briefly tell how they resolve it. Odysseus: Must defeat the cyclops, does so by blinding it. He and his men then tie themselves to the

  90. Vectors

    How would I find the direction vector parallel to a line? For example, how is (2,1) a direction vector parallel to the line -x+2y-10=0

  91. Math

    There are red and blue marbles in a jar. There are 2 more red marbles than blue. There are 8 marbles in all. How many red marbles? How many blue marbles?

  92. math

    There are 32 more apples than oranges in a box. 35 o​f the oranges and 13 o​f the apples are overripe. If the number of overripe apples and the number of overripe oranges are the same, how many pieces of overripe fruit are there?

  93. French

    I would like to double check my work: A. Invert the following: Est-ce qu’elle veut boire un apéritif? Answer: Bois qu'elle un apéritif? B. Make the following statement negative: Nous allons au cinéma et au théâtre. Answer: Nous n'allons pas ni

  94. science

    Which statement is true regarding nuclear energy

  95. Debate

    I need help finding a good article for my essay. I need to address the issue that fast food restaurants now serve healthy alternatives, and that it can be good for ebt holders.

  96. Calculus

    Find constants a and b in the function f(x)=axbln(x) such that f(15)=1 and the function has a local minimum at x=15.

  97. Chemistry

    Citric acid is a triprotic acid with Ka values of 3.14, 5.95, and 6.39. Estimate the pH of a 0.15 M solution of a monosodium salt

  98. Calculus

    Find constants a and b in the function f(x)=(ax^b)ln(x) such that f(1/5)=1 and the function has a local minimum at x=1/5.

  99. History Check Please (No Rude Comments)

    Before the Civil War most cattle were not (1 point) on the open range. on South Texas ranches.* slaughtered for their hides. shipped to cities in the northeast. 6. After the Civil War, (1 point) many plantations were divided into smaller farms.*

  100. chemistry

    Calculate the molar concentrations of all phosphate species in H3PO4 in a solution with pH = 2.25, given that the concentration of all four forms of phosphate total 15 mM.

  101. Calculus

    Let f(x)=−x^4−8^x3+5^x+2. Find the open intervals on which f is concave up (down). Then determine the x-coordinates 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

  102. math104

    Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.64 cross product 10−5 watts/cm2

  103. Pre-Calc.

    Write the geometric sequence that has four geometric means between 1 and 16,807.

  104. math

    if I bought 3 items at 24.95 and 2 items at 45 and they were all 30% off, If I had bought these 5 items without the 30$ off what would I have paid

  105. Chemistry

    How many grams of CO(g) are there in 67.0mL of the gas at 0.826atm and 30 ∘C?