# 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

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

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

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

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

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

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