Questions Asked in March 2013

Most Popular Questions of March 2013

  1. Math for Ms. Sue please! Last math questions!

    1. What is the term for data that are grouped closely together? (1 point) outlier linear positive clustering 2. What association would you expect if graphing height and weight? (1 point) positive nonlinear negative none of these 4. What association would

    asked by Delilah on March 15, 2013
  2. math check answer

    1. Which line models the data points better and why? blue, because the data points are all close to the line red, because it goes through one of the points i think that is A

    asked by batman on March 22, 2013
  3. Pre-Algebra

    1) Find the surface area for a sphere with a radius of 10 feet. Round to the nearest whole number. a. 1,256 ft2 b. 4,189 ft2 c. 1,089 ft2 d. 1,568 ft2 2) Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number. a. 1,257 ft3

    asked by Alexa on March 13, 2013
  4. math Ms. Sue please

    3. Which of the following examples would show a negative trend? (1 point) height and weight of students test scores and height of students outside temperature and heating bill none of these Is the answer " test scores and height of students"?

    asked by Delilah on March 15, 2013
  5. Help Ms.Sue Please

    1.Find the lateral area of a cone with a radius of 7 ft. and a slant height of 13 ft. Use 3.14 for ð and round to the nearest tenth. 439.6 ft2 324.5 ft2 571.5 ft2 285.7 ft2 2.Find the surface area of a square pyramid with a base length of 24 cm and a

    asked by Deliah on March 14, 2013
  6. Theoretical&Experimental Probability please help!

    Please check my work thanks!! A number cube with the numbers 1 through 6 is rolled. Find the given probability. 1. P(number < 2) (1 point) A. 1/6

    asked by Matthew on March 6, 2013
  7. Chemistry

    1. Which of the following metals is oxidized by calcium ions? *potassium zinc iron lead 2. The first electrochemical cell was invented by ____. Michael Faraday *Alessandro Volta James Maxwell Benjamin Franklin 3. Why can't a lead storage battery be

    asked by Jack on March 28, 2013
  8. Pre-Algebra

    1. What data are represented by the stem-and-leaf plot below? 3 | 7 8 9 4 | 1 3 7 5 | 2 4 Key: 4 | 1 means 41 a. 37, 38, 39, 41, 43, 47, 52, 54 b. 73, 83, 93, 14, 34, 74, 25, 45 c. 7, 8, 9, 1, 3, 7, 2, 4 d. 37, 38, 39, 14, 34, 74, 25, 45 2. Find the mode

    asked by Janessa on March 20, 2013
  9. English

    Scientists report (1) THAT CREATURES LIVING IN THE DEEP SEA ARE IN DANGER OF STARVING TO DEATH. Millions of undiscovered species live, in the deep sea. Creatures in the seabed are suffering from growing food shortages. Which may be a result of rising sea

    asked by Danii on March 1, 2013
  10. Algebra

    Determine whether each sequence is arithmetic or geometric. Find the next three terms. 14, 19, 24, 29, . . . A.geometric, 34, 39, 44 B.arithmetic, 32, 36, 41 C.arithmetic, 34, 39, 44 D.The sequence is neither geometric nor arithmetic. I think this is C...?

    asked by Cassie on March 19, 2013
  11. Math: Please help

    1. What is the simplified form of squared root 140? A.) 4 to the square root of 35 B.) 10 to the square root of 14 C.) 2 to the square root of 70 D.) 2 to the square root of 35 Please show me how to do this Thank You

    asked by Jim on March 12, 2013
  12. precalculus

    Outside temperature over a day can be modelled as a sinusoidal function. Suppose you know the temperature is 80 degrees at midnight and the high and low temperature during the day are 90 and 70 degrees, respectively. Assuming t is the number of hours since

    asked by marie darling on March 26, 2013
  13. Chemsitry

    The Ksp of PbBr2 is 6.60× 10^–6. What is the molar solubility of PbBr2 in pure water? What is the molar solubility of PbBr2 in 0.500 M KBr solution? What is the molar solubility of PbBr2 in a 0.500 M Pb(NO3)2 solution?

    asked by Anon on March 17, 2013
  14. Math

    13. A catapult launches a boulder with an upward velocity of 148 ft/s. The height of the boulder (h) in feet after t seconds is given by the function h = –16t² + 148t + 30. How long does it take the boulder to reach its maximum height? What is the

    asked by Jim on March 11, 2013
  15. Physics

    A 20 kg crate is placed on a horizontal conveyor belt. The materials are such that us = 0.47 and uk = 0.21. What is the maximum acceleration the belt can have without the crate slipping? If acceleration of the belt exceeds the value determined in part A,

    asked by Leanna on March 3, 2013
  16. calculus

    A potter forms a piece of clay into a right circular cylinder. As she rolls it, the height h of the cylinder increases and the radius r decreases. Assume that no clay is lost in the process. Suppose the height of the cylinder is increasing by 0.5

    asked by mike on March 31, 2013
  17. Chemistry

    Which solution below has the highest concentration of hydronium ions? pH = 9.82 pH = 12.6 pH = 7.93 pH = 3.21 pH = 7.00

    asked by DrewS on March 19, 2013
  18. ~*Math Probability*~

    Which expression would you use to figure out the number of ways you can arrange the letters in the word equation? (1 point) 8! 8P4 4P8 4! Five friends are having their picture taken. How many ways can the photographer arrange the friends in a row? (1

    asked by Student on March 13, 2013
  19. chem

    Consider the titration of 30.0 mL of 0.050 M NH3 with 0.025 M HCl. Calculate the pH after the following volumes of titrant have been added. (The Kb for NH3 is 1.8e-05.) (a) 0 mL . (b) 25.0 mL . (c) 59.0 mL . (d) 60.0 mL (e) 63.0 mL (f) 67.5 mL

    asked by hannah on March 25, 2013
  20. Math

    the mass of earth is 5.97 x 10^24 kilograms. The mass of the moon is 7.34 x 10^22 kilograms. Part A: What is the combined mass of earth and the moon? express your answer in scientific notation. Part B: How many times greater is the mass of earth than the

    asked by Jayson Angole on March 31, 2013
  21. Chemistry

    Imagine two solutions with the same concentration and the same boiling point.? Imagine two solutions with the same concentration and the same boiling point, but one has ethanol as the solvent and the other has carbon tetrachloride as the solvent. Determine

    asked by Dee on March 2, 2013
  22. Chemistry

    If acetic acid is the only acid that vinegar contains [Ka = 1.8*10-5] , calculate the concentration of acetic acid in the vinegar. pH of vinegar is 3.20 _______________ First I got the antilog of the pH given, which turned out to be 6.309E-4. Then I did

    asked by Jonah on March 1, 2013
  23. Algebra

    Which radical expression is in simplified form? a.11y/sq rt 3 b.sq rt 6/5y c. sq rt 17/sq rt 4 d.sq rt 25/81 I think it might be B...not positive though...?

    asked by Cassie on March 13, 2013
  24. Math: Probability

    1. Which of the following is an example of a dependent event? (1 point) flipping two coins rolling a number cube and spinning a spinner choosing two scoops of ice cream choosing a cookie at random, eating it, and then choosing another at random 2. Which of

    asked by Skittles on March 12, 2013
  25. Chemistry

    The Keq for the equilibrium below is 5.4 × 1013 at 480.0 °C. 2NO (g) + O2 (g) ↔ 2NO2 (g) What is the value of Keq at this temperature for the following reaction? NO2 (g) ↔ NO (g) + 1/2 O2 (g) The Keq for the equilibrium below is 5.4 × 1013 at 480.0

    asked by DrewS on March 19, 2013
  26. Chemistry

    For each electron in a ground-state Be atom, select the set of quantum numbers that represents it. Check all that apply. n=1 l=0 ml=-1 ms= +1/2 n=1 l=0 ml=0 ms=-1/2 n=2 l=1 ml=0 ms= -1/2 n=1 l=0 ml=0 ms=+1/2 n=2 l=1 ml=1 ms=+1/2 n=2 1=0 ml=0 ms=+1/2 n=2

    asked by Anonymous on March 24, 2013
  27. Chemistry

    Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. kPa1: 2.16 kPa2: 7.21 kPa3:12.32 [H3PO4] = ?

    asked by Paula on March 10, 2013
  28. math help please

    2. A teacher asks her class of 22 students, “What is your age?” Their responses are shown below. 19, 19, 14, 14, 16, 19, 19, 16, 16, 15, 17, 16, 17, 16, 15, 14, 15, 15, 17, 14, 16, 15 Find the mean, median, and mode for the data. If necessary, round to

    asked by Delilah on March 25, 2013
  29. Math Ms. Sue please

    2. Find the outlier in the data set and tell how it affects the mean. 4, 4, –6, –2, 14, 1, 1 (1 point) –6; it raises the mean by about 1. –6; it lowers the mean by about 1. 14; it raises the mean by about 1.9. 14; it lowers the mean by about 1.9.

    asked by Delilah on March 8, 2013
  30. Trigonometry question?

    Let ABCD be a square, and let M and N be the midpoints of BC and CD respectively. Find sin

    asked by Knights on March 28, 2013
  31. Chemistry

    . For the reaction 2H2(g) + 2NO(g) → N2(g) + 2H2O(g) The observed rate law is Rate =k[NO]2[H2] The mechanisms shown below have been proposed to explain the kinetics of the above reaction Which of the following are acceptable mechanisms? Explain you

    asked by m on March 5, 2013
  32. precalculus

    A ferris wheel is 20 meters in diameter and boarded from a platform that is 3 meters above the ground. The six o'clock position on the ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 10 minutes. The function h =

    asked by Anonymous on March 25, 2013
  33. geomerty

    The hexagon GIKMPR and FJN are regular. The dashed line segments form 30° angles. Find the image of after a rotation of 300° about point O.

    asked by TThias on March 17, 2013
  34. Chemistry

    What volume of a 15.0% by mass NaOH solution, which has a density of 1.116 g/mL, should be used to make 4.40 L of an NaOH solution with a pH of 10.5?

    asked by Emma on March 17, 2013
  35. Please help check physical science!

    Please help check my answers I really want to make a 100%! 1. A mechanical wave moves through a medium, which can be (1 point) A. a liquid. B. a solid. C. a gas. D. all of the above

    asked by Matthew on March 6, 2013
  36. Algebra

    Which kind of function best models the data in the table? Use differences or ratios. x y 0 1.7 1 6.8 2 27.2 3 108.8 4 435.2 A.linear B.quadratic C.exponential D.none of the above I think it is C...?

    asked by Cassie on March 11, 2013
  37. proprotions

    why did the envelope lose the race with the cardboard box?

    asked by Anonymous on March 18, 2013
  38. Chemistry

    Which of the following reagents would oxidize Cr to Cr2 , but not Fe to Fe3 ? Ca Co Ca2+ Br2 Co2+ Br- Which of the following reagents would oxidize Cu to Cu2 , but not Cl– to Cl2? Br2 Ca Co2+ Co Br- Ca2+

    asked by Anon on March 29, 2013
  39. Scatter plots

    Which of the following types of information is NOT suited for display on a scatter plot? 1. relationship between age and number of books read in a year 2. relationship between height and shoe size 3. relationship between calories consumed and body weight

    asked by Mr.Brain on March 26, 2013
  40. Math Plz help

    survey about the student government program at a school finds that of 245 students: 218 students like the program 27 students think the program is unnecessary If a circle graph were made from this data, what would the measure of the central angle be for

    asked by Jack 'N Jill on March 28, 2013
  41. chemistry (Pls Bob check for me)

    A 0.5g of fuming h2so4 oleum is diluted with water. This solution is completedly neutralized by 26.7ml of 0.4N naoh. Find the percentage of free so3 in the sample The asnwer 20.6% My calculation h2so4= 98/2 = 49 so3= 80/2 = 40 26.7ml x 0.4N = 10.68ml -

    asked by Fai on March 24, 2013
  42. Chemistry

    1. Which metal is the most easily oxidized? A.) highly active metal *B.) moderately active metal C.) slightly active metal D.) an inactive metal 2. What happens in a voltaic cell? *A.) Chemical energy is changed to a electrical energy. B.) Electrical

    asked by Jose on March 27, 2013
  43. Chemistry

    A buffer consists of 0.16 M KHCO3 and 0.39 M K2CO3. Carbonic acid is a diprotic acid with Ka1 = 4.5 10-7 and Ka2 = 4.7 10-11. (a) Which Ka value is more important to this buffer? Ka1 Ka2 I don't understand this one at all. How do I determine which Ka value

    asked by Edward on March 4, 2013
  44. Math

    A cylinder shaped can needs to be constructed to hold 400 cubic centimeters of soup. The material for the sides of the can costs 0.03 cents per square centimeter. The material for the top and bottom of the can need to be thicker, and costs 0.06 cents per

    asked by jonh on March 10, 2013
  45. Cal 1

    Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) (1 + 2x)^1/4 ≈ 1 + 1/2x

    asked by Dee on March 7, 2013
  46. Improving Vocabulary Skills

    Can you help me with the ten words to fill in each blank on Improving Vocabulary Skills Chapter 13, 14, 15, 16, 17 for the Final Check 2?

    asked by Divine0324 on March 12, 2013
  47. Physics

    A fast-moving superhero in a comic book runs around a circular, 70-m-diameter track five and a half times (ending up directly opposite her starting point) in 3.0s. What is her angular speed, in rad/s?

    asked by Leanna on March 8, 2013
  48. Algebra 2

    What are the mean, variance, and standard deviation of these values? Round to the nearest 10th. 92, 97, 53, 90, 95, 98

    asked by Lea on March 13, 2013
  49. chem

    Consider the fermentation reaction of glucose: C6H12O6 ----) 2C2H5OH+2CO2 A 1.00-mol sample of C6H12O6 was placed in a vat with excess yeast. If 35.1 g of C2H5OH was obtained, what was the percent yield of C2H5OH?

    asked by shane on March 14, 2013
  50. Chemistry

    Consider the decomposition of barium carbonate: BaCO3(s)= BaO(s) + CO2(g). Using data from Appendix C in the textbook, calculate the equilibrium pressure of CO2 at 298K.

    asked by Jona on March 31, 2013
  51. Statistics

    Suppose a basketball player is an excellent free throw shooter and makes 90% of his free throws (i.e., he has a 90% chance of making a single free throw). Assume that free throw shots are independent of one another. Suppose this player gets to shoot three

    asked by Grace on March 17, 2013
  52. Math

    Mr. Green teaches band, choir, and math. This year, he has 57 students that take at least one of his classes. He teaches band to 25 students. There are 48 students who take either band or choir or both. There are 9 students who take both math and choir

    asked by Unknown on March 27, 2013
  53. math

    What percentage of the total students chose skateboarding? (1 point) 10% 20% 30% none of these if 2 bys and 1 girl chose skateboarding? What percentage of the boys chose walking? (1 point) 30% 45% 25% none of these

    asked by Terry on March 27, 2013
  54. Chemistry Equilibrium

    Which of the following conditions is always true at equilibrium? deltaG=0, Q=1, K=1, deltaG=deltaG(standard), deltaG(standard)=0, Q=0, deltaG(standard)=1 I'm so confused, please help!

    asked by Student on March 14, 2013
  55. chemistry

    A saline solution contains 1.1% NaCl by mass. How much NaCl is present in 87.2 g of this solution?

    asked by Amee on March 11, 2013
  56. Math(problem solving)

    Four darts are thrown at this dartboard. If all four darts hit the board, how many different point totals are possible? there are 4 circles with point totals: working out from the middle bulls eye.. bulls eye = 9 2nd circle = 7 3rd circle = 4 outter circle

    asked by sarah on March 6, 2013
  57. Chemistry

    Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. pKa1: 2.16 pKa2: 7.21 pKa3: 12.32 Hint: Convert

    asked by Paula on March 9, 2013
  58. Math Ms. Sue please

    1. What type of graph does not show the number of times a response was given? (1 point) box-and-whisker plot line plot stem-and-leaf plot bar graph 2. Which of the following types of information is suited for display on a scatter plot? (1 point)

    asked by Delilah on March 20, 2013
  59. Chemistry

    A solution is 5.0× 10–5 M in each of these ions: Ag , SO42–, Cl–, CO32– Which precipitate will form? Ag2SO4 (Ksp = 1.12× 10–5) AgCl (Ksp = 1.77× 10–10) Ag2CO3 (Ksp = 8.46× 10–12)

    asked by Anon on March 14, 2013
  60. Physics

    A ball is projected upward at time t= 0.0s, from a point on the roof 10m above the ground. The ball rises, then falls until it strikes the ground. The initial velocity of the ball is 58.5 m/s. At time t=5.97s, what is the approximate velocity of the ball?

    asked by Renay on March 22, 2013
  61. Lang, Arts

    1.Which of the following would always require a citation in a research paper? A.Thesis statement B.an anecdotal experience C.a quotation D.a humorous statement I think it is C...? 2. Which of the following shows the correct parenthetical citation for

    asked by cassie on March 20, 2013
  62. Physics

    A transport plane takes off from a level landing field with two gliders in tow, one behind the other. The mass of each glider is 700 {kg}, and the total resistance (air drag plus friction with the runway) on each may be assumed constant and equal to 2100N

    asked by Gareth on March 12, 2013
  63. CHEM

    A 0.4647-g sample of a compound known to contain only carbon, hydrogen, and oxygen was burned in oxygen to yield 0.8635 g of CO2 and 0.1767 g of H2O. What is the empirical formula of the compound? i got C3H3O2 IS IT RIGHT?

    asked by shane on March 14, 2013
  64. Analytical Chemistry

    Current is applied to an aqueous solution of calcium sulfide. Multiple choice help please??! What is produced at the cathode? A) H2(g) B) S(s) C) O2(g) D) Ca(s) What is produced at the anode? A) O2(g) B) H2(g) C) Ca(s) D) S(s)

    asked by Sam on March 30, 2013
  65. geometry

    A right triangle prism has a volume of 2 cubic inches. A second right triangle prism is similar to the first one and has a volume of 128 cubic inches. A. What is the scale factor to go from the first prism to the second? B. What is the scale factor to go

    asked by Yvonne on March 13, 2013
  66. Physics

    A 50.0g ball of clay traveling east at 3.00 m/s collides and sticks together with a 50.0g ball of clay traveling north at 3.50m/s. What is the speed and direction of the resulting ball of clay?

    asked by Jenny on March 7, 2013
  67. Chemistry

    A 30.0-ml sample of 0.165 M propanoic acid is titrated with 0.300 M KOH. What is the pH at 5 ml of added base, at 10 ml of added base?

    asked by Annie on March 19, 2013
  68. statistics

    Jim Tree sells trees. The mean length of the trees purchased was 68 inches with a standard deviation of 10 inches. Jim wants to know what percent of his sales were more than 84 inches tall. He can use the standard normal distribution to help him. He asks,

    asked by Jessie on March 20, 2013
  69. Geometry

    For diagonals of square Abcd intersect at e . If ae =2x+6 and bd =6x-10 find ac

    asked by Alice on March 21, 2013
  70. Chemistry

    Calculate the pH for each of the following points in the titration of 50.0 mL of a 2.7 M H3PO3(aq) with 2.7 M KOH(aq). pKa1 = 1.3 and pKa2 = 6.7 a) before addition of any KOH b) after addition of 25.0 mL of KOH c) after addition of 50.0 mL of KOH d) after

    asked by KB on March 11, 2013
  71. Statistics

    A national caterer determined that 87% of the people who sampled their food said that it was delicious. A random sample of 144 people is obtained from a population of 5000. The 144 people are asked to sample the caterer's food. If sample proportion, P^, is

    asked by Grace on March 22, 2013
  72. General Chemistry

    At a certain temperature, the equilibrium constant for the following chemical equation is 2.90. At this temperature, calculate the number of moles of NO2(g) that must be added to 2.53 mol of SO2(g) in order to form 1.10 mol of SO3(g) at equilibrium.

    asked by marthy on March 8, 2013
  73. math

    Given the following values, which number would be considered an outlier? 0.9, 2.1, 3.2, 3.9, 7.4, 5.8, 7.2, 8, 9.1 2.1 9.1 8 7.4 ________________________________________ I'm not sure because I was taught that an outlier is either too high or too low so it

    asked by Not Sure on March 11, 2013
  74. statistics

    In a carnival game, a player spins a wheel that stops with the pointer on one (and only one) of three colors. The likelihood of the pointer landing on each color is as follows: 65 percent BLUE, 22 percent RED, and 13 percent GREEN. Note: Your answers

    asked by Sydney on March 31, 2013
  75. algebra

    4. Which of the following is true about a trend line for data? (1 point) The minimum data point always lies on the trend line. Every data point must lie on the trend line. The trend line describes the pattern in the data if one exists. The trend line

    asked by Philly on March 21, 2013
  76. Math for Ms. Sue please last questions

    2. In a school of 464 students, 89 students are in the band, 215 students are on sports teams, and 31 students participate in both activities. How many students are involved in neither band nor sports? (1 point) 160 students 191 students 249 students 433

    asked by Delilah on March 8, 2013
  77. Physics 11th grade 2

    1) A 20 kg rock is on the edge of a 100 m cliff. a. What potential energy does the rock possess relative to the base of the cliff? b. The rock falls from the cliff. What is the kinetic energy just before it strikes the ground? c. What speed does the rock

    asked by Isis on March 11, 2013
  78. chemistry

    A 50/50 blend of engine coolant and water (by volume) is usually used in an automobile\'s engine cooling system. If your car\'s cooling system holds 4.20 gallons, what is the boiling point of the solution? Make the following assumptions in your

    asked by Morgan Parker on March 2, 2013
  79. Applied Calculus

    If an open box is made from a tin sheet 7 in. square by cutting out identical squares from each corner and bending up the resulting flaps, determine the dimensions of the largest box that can be made. (Round your answers to two decimal places.) Height:

    asked by Jacob on March 8, 2013
  80. Chemistry

    (Ksp= 5.0*10^-13) 1) Calculate the molar solubility of AgBr in 3.0×10^−2 M AgNO3 solution. 2) calculate the molar solubility of AgBr in 0.10 M NaBr solution. I tried solving using this the quadratic formula, but it didn't work. I started with these

    asked by Jonah on March 17, 2013
  81. Geometry - semicircle inside isosceles triangle

    Isosceles triangle ABC has sides of length AB=AC=25 and BC=40 . Find the area of a semicircle inscribed in triangle ABC with diameter along BC . Please help I do not know how to start....

    asked by Knights on March 21, 2013
  82. Chemistry

    Acetylene, C2H2, can be converted to ethane, C2H6, by a process known as hydrogenation. The reaction is: C2H2(g) + 2H2(g) === C2H6(g) Given the following, what is the Kp for the reaction? C2H2(g): 209.2 ΔG˚!@#$%^&J/mol) H2(g): 0 ΔG˚!@#$%^&J/mol)

    asked by Ezra on March 31, 2013
  83. Chemistry

    A 5.0-g Sample of KBr at 25.0 degrees celsius dissolves 25.0 mL of water also at 25.0 degrees celsius. The final equilibrium temperature of the resulting soltution is 18.1 degrees celsius. What is the enthalpy of of solution in kilojoules per mole of KBr?

    asked by Sam on March 20, 2013
  84. Stats

    A roulett wheel has 38 slots in which a ball can land two of e slots are green, 18 are red, 18 are black. The ball is equally likely to land in any slot, and each spin of the wheel is assumed to be independent. A)if the wheel is spun twice what is the

    asked by Salina on March 10, 2013
  85. Chemistry

    Solutions of sodium thiosulfate are used to dissolve unexposed AgBr (Ksp = 5.0 10-13) in the developing process for black-and-white film. What mass of AgBr can dissolve in 1.40 L of 0.425 M Na2S2O3? Ag+ reacts with S2O32- to form a complex ion. Ag+(aq) + 2

    asked by Howard on March 18, 2013
  86. math

    an adult whale weighs 120 tons. a baby blue whale weighs 1/40 of the weight of the adult blue whale. how many pounds does the baby blue whle weigh?

    asked by VANESSA on March 17, 2013
  87. Math for Ms. Sue please! Last math questions!

    For numbers 1–3, find the indicated measurement of the figure described. Use 3.14 for pi and round to the nearest tenth. Find the surface area of a sphere with a radius of 8 cm. 267.9 cm^2 803.8 cm^2 2143.6 cm^2 201.0 cm^2 Find the surface area of a

    asked by Delilah on March 3, 2013
  88. Chemistry

    A coffee cup calorimeter contains 25.0 grams water at 23.8 C A 5.00g sample of an unknown metal at an initial temperature of 78.3 C was dropped into the calorimeter. The final temperature of mixture was 46.3 C. Calculate the specific heat of the metal. The

    asked by J on March 19, 2013
  89. calculus

    By cutting away identical squares from each corner of a rectangular piece of cardboard and folding up the resulting flaps, an open box may be made. If the cardboard is 14 in. long and 6 in. wide, find the dimensions of the box that will yield the maximum

    asked by eve on March 16, 2013
  90. Circles / Square

    Alicia has a flat platter shaped like a square with a semicircle of diameter 10 inches on each edge. What is the number of inches in the side length of the smallest square that can contain the platter (which contains the square with the semicircles on each

    asked by Knights on March 25, 2013
  91. Chemistry

    A beaker of nitric acid is neutralized with calcium hydroxide. Write a balanced molecular equation and a net ionic equation for his reaction

    asked by Amee on March 4, 2013
  92. Chemistry

    Determine the value of the equilibrium constant,Kgoal , for the reaction N2(g)+O2(g)+H2(g) (1/2)N2H4(g) + NO2(g) Kgoal=? by making use of the following information: 1.N2(g)+O2(g)2NO(g), K1=4.1010x10^-31 2.N2(g)+2H2(g)N2H4(g), K2=7.40x10^-26

    asked by Sean on March 31, 2013
  93. Chemistry

    If an 0.650 m aqueous solution freezes at –2.00 °C, what is the van't Hoff factor, i, of the solute? Kf values can be found here. the Kf value is 1.86 °C/m. I get 2 for the answer but it is wrong. Please help!

    asked by Anonymous on March 1, 2013
  94. chemistry

    What is the molar concentration of sodium ions in a 0.450 M Na3PO4 solution?

    asked by max on March 30, 2013
  95. Chemistry

    3. Which oxidation-reduction reactions are best balanced by the half-reaction method? A.) covalent reactions *B.)acid-base reactions C.) ionic reactions D.) intermolecular reactions Thank you.

    asked by Anonymous on March 23, 2013
  96. Math

    What type of graph does not show the number of times a response was given? (1 point) a.box-and-whisker plot b.line plot c.stem-and-leaf plot d.bar graph I choose c is that correct

    asked by Giaaa on March 20, 2013
  97. chemistry

    copper compounds such as copper (II) sulfate are toxic. before disposal, these compounds must be treated to reduce their toxicity. describe how to use steel wool to remove the Cu 2+ ions from an aqueous solution of copper (II) sulfate

    asked by Josh on March 7, 2013
  98. chemistry

    what is the IUPAC name for CH3CH2C(CH3)2CH2CH(CH3)2?

    asked by eddie on March 15, 2013
  99. Chemistry

    Consider the titration of 100.0 mL of 0.100 M H2NNH2 (Kb = 3.0 10-6) by 0.200 M HNO3. Calculate the pH of the resulting solution after the following volumes of HNO3 have been added. a)0.0 mL b)20.0 mL c)25.0 mL d)40.0 mL e)50.0 mL f)100.0 mL

    asked by Jeff on March 23, 2013
  100. Chem

    How many grams of Ni would be electroplated if a constant current of 7.2 amperes is passed through a solution of NiSO4 for 90.0 min?

    asked by George on March 19, 2013