Questions Asked in March 2013
 March 1, 2013
 March 2, 2013
 March 3, 2013
 March 4, 2013
 March 5, 2013
 March 6, 2013
 March 7, 2013
 March 8, 2013
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 March 10, 2013
 March 11, 2013
 March 12, 2013
 March 13, 2013
 March 14, 2013
 March 15, 2013
 March 16, 2013
 March 17, 2013
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 March 20, 2013
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 March 22, 2013
 March 23, 2013
 March 24, 2013
 March 25, 2013
 March 26, 2013
 March 27, 2013
 March 28, 2013
 March 29, 2013
 March 30, 2013
 March 31, 2013
Most Popular Questions of March 2013

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 
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 
PreAlgebra
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 
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 
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 
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 
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 
PreAlgebra
1. What data are represented by the stemandleaf 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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
~*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 
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 1.8e05.) (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 
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 
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 
Chemistry
If acetic acid is the only acid that vinegar contains [Ka = 1.8*105] , 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 6.309E4. Then I did
asked by Jonah on March 1, 2013 
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 
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 
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 
Chemistry
For each electron in a groundstate 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 
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 
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 
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 
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 
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 
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 
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 
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 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 
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 
proprotions
why did the envelope lose the race with the cardboard box?
asked by Anonymous on March 18, 2013 
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 
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 
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 
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 
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 
Chemistry
A buffer consists of 0.16 M KHCO3 and 0.39 M K2CO3. Carbonic acid is a diprotic acid with Ka1 = 4.5 107 and Ka2 = 4.7 1011. (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 
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 
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 
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 
Physics
A fastmoving superhero in a comic book runs around a circular, 70mdiameter 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 
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 
chem
Consider the fermentation reaction of glucose: C6H12O6 ) 2C2H5OH+2CO2 A 1.00mol 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 
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 
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 
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 
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 
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 
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 
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 
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 
Math Ms. Sue please
1. What type of graph does not show the number of times a response was given? (1 point) boxandwhisker plot line plot stemandleaf 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 
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 
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 
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 
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 
CHEM
A 0.4647g 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 
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 
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 
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 
Chemistry
A 30.0ml 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 
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 
Geometry
For diagonals of square Abcd intersect at e . If ae =2x+6 and bd =6x10 find ac
asked by Alice on March 21, 2013 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
Chemistry
A 5.0g 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 
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 
Chemistry
Solutions of sodium thiosulfate are used to dissolve unexposed AgBr (Ksp = 5.0 1013) in the developing process for blackandwhite 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 
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 
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 
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 
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 
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 
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 
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 
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 
chemistry
What is the molar concentration of sodium ions in a 0.450 M Na3PO4 solution?
asked by max on March 30, 2013 
Chemistry
3. Which oxidationreduction reactions are best balanced by the halfreaction method? A.) covalent reactions *B.)acidbase reactions C.) ionic reactions D.) intermolecular reactions Thank you.
asked by Anonymous on March 23, 2013 
Math
What type of graph does not show the number of times a response was given? (1 point) a.boxandwhisker plot b.line plot c.stemandleaf plot d.bar graph I choose c is that correct
asked by Giaaa on March 20, 2013 
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 
chemistry
what is the IUPAC name for CH3CH2C(CH3)2CH2CH(CH3)2?
asked by eddie on March 15, 2013 
Chemistry
Consider the titration of 100.0 mL of 0.100 M H2NNH2 (Kb = 3.0 106) 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 
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