Most popular questions and responses by Jen
  1. Statistics

    One of the questions in the Pew Internet & American Life Project asked adults if they used the Internet, at least occasionally. The results showed that 454 out of 478 adults aged 18 - 29 answered yes; 741 out of 833 adults aged 30 – 49 answered yes; 1058

    asked on June 16, 2014
  2. physics

    Suppose you had two small boxes, each containing 1.0 g of protons. (a) If one were placed on the moon by an astronaut and the other were left on the earth, and if they were connected by a very light (and very long!) string, what would be the tension in the

    asked on January 21, 2008
  3. physics

    A model rocket leaves the ground, heading straight up at 47 m/s. (a) What is its maximum altitude? m What are its speed and altitude at each of the following times? (b) 1 s m/s m (c) 4 s m/s m (d) 8 s m/s m

    asked on January 16, 2011
  4. physics

    A merry-go-round in a playground has a mass of 200 kg and radius of 1.50 m. You apply a force F = 23 N tangentially to the edge of the merry-go-round for a time of 6.5 s. The moment of inertia of the merry-go-round is 1/2(mR2). What is the angular

    asked on December 9, 2011
  5. The End of the Cold War

    1. Which is the best example of how Reagan dealt with the Soviet Union from a position of strength? A. development of the strategic defence initiative B. U.s withdrawl of the salt II treaty from senate approval C. Reagan condemning martial law of Poland D

    asked on April 27, 2017
  6. stastics

    If 1.5% of the bolts made by an automotive factory are defective, what is the probability that in a shipment of 200 bolts, there are 6 defective bolts? Place your answer, rounded to four decimal places, in the blank.

    asked on July 8, 2012
  7. statistics

    Go to a local library; collect a sample of books consisting of the ages of book (based on copyright dates). Plan and describe the sampling procedure, then use the results to construct a confidence interval estimate of the mean age of all books in the

    asked on June 26, 2015
  8. Physics

    An astronaut is inside a rocket that is blasting off vertically from the launch pad. You want this rocket to reach the speed of sound (331 m/s) as quickly as possible, but you also do not want the astronaut to black out. Medical tests have shown that

    asked on February 22, 2012
  9. Calculus

    The line that is normal to the curve x^2=2xy-3y^2=0 at(1,1) intersects the curve at what other point? Please help. Thanks in advance. We have x2=2xy - 3y2 = 0 Are there supposed to be 2 equal signs in this expression or is it x2 + 2xy - 3y2 = 0 ? I'll

    asked on October 15, 2006

    1) The specific heat of solid copper is 0.385 J/g(C). What thermal energy change occurs when the temperature of a 34.10 g sample of copper is cooled from 35.7 degrees Celsius to 13.9 degrees Celsius? Answer: -286.3 J This amount of heat is used to melt

    asked on October 17, 2011
  11. Chemistry

    Write the net ionic equation for the equilibrium that is established when ammonium nitrate is dissolved in water. (Use H3O+ instead of H+)

    asked on September 27, 2016
  12. Statistics (Check Work)

    Can Someone help me with these 2 problems? I am certain I am solving them correctly, but for some reason the computer keeps marking my answers as incorrect. Question 1: Minnesota had the highest turnout rate of any state for the 2012 Presidential election.

    asked on June 26, 2014
  13. History

    Zhou rulers claimed that they had won the Mandate of Heaven because they How did the zhou king control his vast kingdom What did zhou artisans discover

    asked on November 7, 2018
  14. chem 15

    The hardness of water (hardness count) is usually expressed as parts per million (by mass) of calcium carbonate. What is the molar concentration of calcium ions in a water sample with a hardness count of 175ppm?

    asked on November 8, 2016
  15. calculus

    If y is a differentiable function of x, then the slope of the tangent to the curve xy - 2y + 4y^2 = 6 at the point where y=1 is ...... How do I do this? Thanks. xy - 2y + 4y^2 = 6 ---> d[xy - 2y + 4y^2] = 0 ---> xdy + ydx - 2dy + 8ydy = 0 ---> (x + 8y -

    asked on December 3, 2006
  16. Physics

    A 15.0 kg box is released on a 32 degree incline and accelerates down the incline at 0.30m/s sqaured ? find the friction force impeding its motion. What is the coefficient of kinectic friction?

    asked on February 15, 2011
  17. Exponents-word problem

    A culture starts at 8600 bacteria. After one hour the count is 10,000. Find a function that models the number of bacteria n(t) after t hours. The answer is n(t) = 8600e^.1506t Where does this 0.1506 come from? Thanks. n(t) = 8600 e^(kt), where k is an

    asked on February 16, 2007
  18. Chemistry

    If the heat from burning 5.800 g of C6H6 is added to 5691 g of water at 21 °C, what is the final temperature of the water? 2C6H6(l) +15O2 (g)----> 12CO2(g)+6H2O(l) +6542

    asked on February 10, 2012
  19. physics

    A 2500N pile-driver ram falls 10m and drives a post 0.1m into the ground. Find the average impact of force on the ram.

    asked on July 27, 2010
  20. physics

    A refrigerator has a coefficient of performance of 2.25, runs on an input of 95 W of electrical power, and keeps its inside compartment at 5 degrees celsius. IF you put a dozen 1.0 L plastic bottles of water at 31 degrees celsius in the refrigerator, how

    asked on December 2, 2007
  21. College Physics

    A fisherman notices that his boat is moving uo and down periodically, owing to waves on the surface of the water. It takes 2.5 s for the boat to travel from its highest point to its lowest, a total distance of 0.62 m. The fisherman sees that the wave

    asked on October 26, 2007
  22. Math

    If you where to plot the following points for two dimensional X and Y axis; POINT 1 (1, 0) POINT 2 (1, -1) POINT 3 (1, -2) POINT 4 (2, 2) then draw lines to connect from point 1 to point 2 to point 3 to point 4 QUESTION: the lines that you would have drawn

    asked on September 30, 2008
  23. chemistry

    In clinical lab reports, some concentrations are given in mg/dL. Convert a Ca2+ concentration of 3.5 mg/dL to weight/volume percent.

    asked on March 28, 2010
  24. Eng

    Which statement is most accurate regarding the speaking-writing connection? A. To own a word, write it over and over again. B. Written words seldom reflect the words people use when they speak. C. To own a word, speak it. D. The words used by writers are

    asked on June 25, 2013
  25. college physics

    A 0.25 kg skeet (clay target) is fired at an angle of 30 degrees to the horizon with a speed of 25 m/s. When it reaches the maximum height, it is hit from below by a 15 g pellet travelling upward at a speed of 200 m/s. The pellet is embedded in the skeet.

    asked on August 19, 2010
  26. solving trig. equations

    tan(3x) + 1 = sec(3x) Thanks, pretend 3x equals x so tanx + 1 = secx we know the law that 1 + tanx = secx so tanx + 1 becomes secx and... secx = secx sec(3x) = sec(3x) [just put 3x back in for x- you don't really have to change 3x to x but it kinda makes

    asked on April 12, 2007
  27. physics

    Calculate the mass of nitrogen present in a volume of 3000 cm^3 if the temperature of the gas is 22 degrees Celsius and the absolute pressure is 2.00 * 10^-13 atm, a partial vacuum easily obtained in laboratories. The molar mass of nitrogen (N2) is 28

    asked on November 15, 2007
  28. Statistics

    Can someone please help me answer these questions? I have tried every method I know and the computer still keeps marking the answers as incorrect. Thanks for the help! 1) If the number of 18-34 year olds sampled is equal to the value identified in part

    asked on June 10, 2014
  29. Chemistry

    How many electrons in an atom could have these sets of quantum numbers? n=2 n=5, l=3 n=6, l=1, ml=-1

    asked on November 13, 2016
  30. Calculating distance(law of cosines)

    Observers P and Q are located on the side of a hill that is inclined 32 degrees to the horizontal as shown(picture given). The observer at P determines the angle of elevation to a hot air balloon to be 62 degrees. At the same instant the observer at Q

    asked on March 27, 2007
  31. Chemistry

    Suppose you have a strong peak at 2230 cm–1. What is the wavelength of the radiation that was absorbed?

    asked on August 25, 2012
  32. Chemistry IR Spectroscopy

    Sort the compounds: conjugated or non conjugated. -but-2-enoic acid -butanoic acid -hex-4-en-3-one -hexan-3-one

    asked on August 25, 2012
  33. physics

    Two equal point charges of +3.00 * 10^ -6 C are placed 0.200 m apart. What are the magnitude and direction of the force each charge exerts on the other?

    asked on January 21, 2008
  34. math 9

    Given Parallelogram ABCD with AB=(3x-5)cm, BC=(2y-7)cm, Cd=(x+7)cm, AD=(y+3)cm

    asked on November 13, 2016
  35. math

    Using the numbers 2,3,5,10,24 write two separate equations that equal 120

    asked on May 6, 2014
  36. math

    A ball is thrown from the edge of a cliff with an initial velocity of 60·m/s upward. Answer the following questions using + (upward) and - (downward) to indicate the direction of the velocity. Ignore air resistance and assume the ball does not hit the

    asked on October 13, 2011
  37. Finance

    You want to purchase a new condominium that costs $287,500. Your plan is to pay 25 percent down in cash and finance the balance over 15 years at 3.75 percent. What will be your monthly mortgage payment including principal and interest? $1,568.07 $1,333.33

    asked on February 5, 2017
  38. Latin I

    1. Estne in Campania? a. where is Campania? b. he is in Campania, isn't he? c. he is not in Campania, is he? d. Is he in Campania? 2. Vesuviusne populum terruit? a. did vesuvius frighten the people? b. Vesuvius did not frighten the people, did it? c.

    asked on February 9, 2015
  39. physics

    For a scene in a movie, a stunt driver drives a 1.50×10^3kg SUV with a length of 4.00m around a circular curve with a radius of curvature of 0.333 km. The vehicle is to be driven off the edge of a gully 10.0 m wide, and land on the other side 2.96 m below

    asked on October 11, 2013
  40. Physics

    An 11.98-gram sample of zinc metal is placed in a hot water bath and warmed to 78.4°C. It is then removed and placed into a Styrofoam cup containing 50.0 mL of room temperature water (T=27.0°C; density = 1.00 g/mL). The water warms to a temperature of

    asked on April 28, 2016
  41. Algebra

    Use substitution to determine whether the ordered pair (–2, –3) is a solution of the equation x2 – y = 7. Show some work. Be sure to state your conclusion about whether the ordered pair is a solution or not.

    asked on June 9, 2009
  42. closing off first quadrant

    You are planning to close off the corner of the first quadrant with a line segment 20 units long running from (a,0) to (0,b). Show that the area of the triangle enclosed by the segment is largest when a=b From applications of derivatives...this is really

    asked on November 18, 2006
  43. chemistry

    why should excess alkali be avoided in the ferric chloride test for acetic acid and benzoic acid?

    asked on March 30, 2018
  44. Poetry

    What is the tone of the poem "Litany" by Billy Collins? Is there some sort of message or is he just being weird? Since the first two lines were written by that Belgian guy, I would imagine he is making fun of love poems. Am I in the right direction?

    asked on December 18, 2007
  45. Latin I

    “Arms and the man I sing”—With these words Virgil began his poem about the origins of the Rome. The “wars” were not only the famous Trojan War, but also the wars in Italy; “the hero” is Aeneas, who traveled from Troy to a new town, New Troy,

    asked on April 11, 2015
  46. College Physics

    Tarzan spies a 35kg chimpanzee in severe danger, so he swings to the rescue. He adjusts his strong, but very light, vine so that he will first come to rest 4.0 s after beginning his swing, at which time his vine makes a 12 degree angle with the vertical.

    asked on October 26, 2007
  47. Chemistry

    Assume the solubility of benzoic acid in ice-cold water is 1.70 g/L and the solubility of benzoic acid in hot water is 68.0 g/L. Calculate the minimum volume of water (in mL) needed to recrystallize 0.950 g of benzoic acid.

    asked on August 12, 2012
  48. chemistry

    What atomic or hybrid orbitals make up the sigma bond between As and F in hexafluoroarsenate ion, AsF6- ? orbital on AS:? orbital on F:?

    asked on September 30, 2009
  49. Statistics

    A company manufactures calculators in batches of 64 and there is a 4% rate of defects. Find the probability of getting exactly three defects in a batch.

    asked on February 4, 2008
  50. History

    Hi I'm honestly stuck on these 3 questions, I looekd on wiki and everything. Please Please help me out.. What action did President Polk take that resulted in the war between the United States and Mexico? He ordered troops to invade Mexico and capture Vera

    asked on December 21, 2014
  51. Chemistry

    In Millikan's experiment, the charge on each drop of oil was measured in coulombs. Imagine the same experiment, but with charges measured in a fictitious unit called a zeet (). Drop Charge () A 1.38×10−14 B 3.22×10−14 C 3.68×10−14 D 4.14×10−14

    asked on September 9, 2011
  52. chemistry

    Question 1. A Compound Containing 3 Atoms Of Carbon & 8 Atoms Of Hydrogen Is Combined In A Reaction With Oxygen Molecules. The 2 End Products Of This Equation Are Carbon Dioxide &water. What Element Should You Look At 1st In Balancing This Equation? Choose

    asked on September 23, 2008
  53. chemistry

    A 100.0 ml sample of 0.300 M NaOH is mixed with a 100.0 ml sample of 0.300 M HNO3 in a coffee cup calorimeter. Both solutions were initially at 35.0 degrees celcius; the temperature of the resulting solution was recorded at 37.0 degrees celcius. Determine

    asked on July 12, 2012
  54. Social studies

    2. According to the map, how did people first arrive in North America? (A). They traveled by boat from Africa. (B). They sailed across the Atlantic ocean. (C). They migrated from South America to North America. (D). They walked or paddled from Asia to

    asked on September 13, 2017
  55. Eng B

    It's most accurate to say that interpretative literature A. is intended to meet the reader's expectations. B. weaves exciting action around a standard formula. C. contains or suggests universal truths. refers to today's hot topics. Answer is A

    asked on April 29, 2013
  56. polynomials & rational function

    A drug is administered to a patient and the concentration of the drug in the bloodstream is monitored. At time t >= 0(in hours since giving the drug) the concentration is given by(in mg/L) c(t) = 5t / (t^2+1) Graph the function. From the graph, how do I

    asked on February 2, 2007
  57. Algebra

    The arch of the bridge below is half an ellipse, a "semi-ellipse". The arch is 148m long and has a height of 48m at the center. The height of the arch is 10m at point p. What is the distance from p to the center?

    asked on January 25, 2017
  58. Chemistry

    If 50.0mL of 1.60M HCl was added to 50.0mL of 1.80M NaOH, calculate the molarity of the resulting NaCl solution. (Hint: resulting solution has a volume of 100 mL)

    asked on April 1, 2010
  59. geography

    why is Washington DC. included in the southeast region?

    asked on January 19, 2009
  60. Neutons Thrid law

    3. A force of 36 N gives a mass m1 an acceleration of 4.0 m/s2. The same force gives a mass m2 an acceleration of 12 m/s2. What acceleration will this force give to m1 and m2 if the two masses are fastened together? {3.0 m/s2}

    asked on April 8, 2016
  61. Latin I

    Primo (at first), natura ab viris adorabatur. Antequam (afterwards), viri et feminae deos et deas laudabant. Tum (Then) animas naturae laudabant. Animae naturae timebantur. Viri rogabant: De quo luna (moon) venit (comes)? De quo sol (sun) venit (comes)?

    asked on February 10, 2015
  62. physics

    A refrigerator has a coefficient of performance of 2.25, runs on an input of 95 W of electrical power, and keeps its inside compartment at 5 degrees celsius. IF you put a dozen 1.0 L plastic bottles of water at 31 degrees celsius in the refrigerator, how

    asked on December 2, 2007
  63. Chemistry

    Question 1. A Compound Containing 3 Atoms Of Carbon & 8 Atoms Of Hydrogen Is Combined In A Reaction With Oxygen Molecules. The 2 End Products Of This Equation Are Carbon Dioxide &water. What Element Should You Look At 1st In Balancing This Equation? Choose

    asked on September 23, 2008
  64. physics

    A Carnot engine is operated between two heat reservoirs at temperatures 520 K and 300 K. (a) If the engine receives 6.45 kJ of heat energy from the reservoir at 520 K in each cycle, how many joules per cycle does it reject to the reservoir at 300 K? (b)

    asked on December 2, 2007
  65. physics

    An astronaut on a distant planet wants to determine its acceleration due to gravity. The astronaut throws a rock straight up with a velocity of 13.5 m/s and measures a time of 21.8 s before the rock returns to his hand. What is the acceleration due to

    asked on January 15, 2012
  66. Navigation

    A fisherman leaves his home port and heads in the direction N 70 degree W. He travels 30 mi and reaches Egg Island. The next day he sails N 10 degree E for 50 mi, reaching Forrest Island. a) Find the distance between the fisherman's home port and Forrest

    asked on March 27, 2007
  67. rate of change

    A missile rises vertically from a point on the ground 75,000 feet from a radar station. If the missile is rising at the rate of 16,500 feet per minute at the instant when it is 38,000 feet high, what is the rate of change(in radians per minute) of the

    asked on December 10, 2006
  68. Civic

    One factor determining the number of representatives for a given congressional district is the distribution of _____ within the state A. registered voters B. population C. jobs D. wealth Answer is "B"

    asked on May 17, 2013
  69. physics

    A negative charge of -0.550 uC exerts an upward 0.200 N force on an unknown charge 0.300 m directly below it. (a) what is the unknown charge (magnitude and sign)? (b) What are the magnitude and direction of the force that the unknown charge exerts on the

    asked on January 21, 2008
  70. science-plz help this is so urgent!

    8. a) after the oceans, where is the next largest reserve of water found? b) does this reserve contain salt water or fresh water? Fresh water lakes on the surface. Glaciers and icecaps account for a greater amount of water than lakes swamps and rivers if

    asked on June 7, 2007
  71. College Physics

    A positively charged rubber rod is moved close to a neutral copper ball that is resting on a nonconducting sheet of plastic. a) Sketch the distribution of the charges on the ball. b) With the rod still close to the ball, a metal wire is briefly connected

    asked on January 21, 2008
  72. Science - Physics

    A meter stick is balanced at the 50-cm mark. You tie a 20-N weight at the 20-cm mark. At which mark should a 30-N weight be placed so that the meter stick will again be balanced?

    asked on July 6, 2010
  73. Math

    Together Paul and Jack earned $72 washing cars. Jack washed twice as many cars as Paul. If Paul washed 3 cars, how much did they charge to wash each car?

    asked on January 10, 2016
  74. Math

    Write a negation of the statement. Not all people like football.

    asked on July 12, 2011
  75. Statistics

    A sample of 12 measurements has a mean of 34 and a standard deviation of 4.5. Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 34 each. A. Find the mean of the sample of 14

    asked on April 29, 2010
  76. physics

    Two identical small insulating balls are suspended by separate 0.17 m threads that are attached to a common point on the ceiling. Each ball has a mass of 7.40 10-4 kg. Initially the balls are uncharged and hang straight down. They are then given identical

    asked on February 27, 2014

    The width of the Confidence Interval is inversely related to the Maximum Error of Estimate. T or F? Why or why not?

    asked on November 3, 2011
  78. AP chem

    A 1.25-g sample contains some of the very reactive compound Al(C6H5)3. On treating the compound with aqueous HCl, 0.951 g of C6H6 is obtained. Al(C6H5)3(s) + 3HCl(aq) --> AlCl3(aq) + 3C6H6(l) Assuming that Al(C6H5)3 was converted completely to products,

    asked on September 6, 2011
  79. College Physics

    A certain transverse wave is described by the equation y(x,t) = (6.50 mm)sin2pi((t/0.0360 s)-(x/0.280m)) Determine the wave's (a) amplitude (b) wavelength (c) frequency (d) speed of propagation and (e) direction of propagation

    asked on October 26, 2007
  80. Sociology

    Im writing a paper on the similarities and differences of race and ethnicity. I have no problem finding similarities on the two, but finding differences are challenging. The only difference I know of is that they are both socially constructed. Can

    asked on April 10, 2016
  81. chemistry

    A dynamic equilibrium, Ag2CO3(s) 2Ag+(ag) , CO3 2- (ag), what affect does the addition af HCl have on the system? Does it cause a shift?

    asked on March 19, 2012
  82. statistics

    A simple random sample size of n = 150 is obtained from a population whose size is N = 20,000 and whose population proportion with a specified characteristic is p = 0.6. What is the probability of obtaining x = 96 or more individuals with the

    asked on March 30, 2013
  83. Chemistry

    Assume your sample spots are 1 cm above the bottom of the TLC plate. What happens if you put the plate in a developing chamber that has 1.2 cm of developing solvent? A. The solvent will move up the plate by capillary action faster. B. The sample spots will

    asked on August 18, 2012
  84. Chemistry

    Hydrogen sulfide is an impurity in natural gas that must be removed. One common removal method is called the Claus process, which relies on the reaction: 8 H2S(g) + 4 O2(g)--> S(l) + 8 H2O(g) Under optimal conditions the Claus process gives 98% yield of S8

    asked on October 31, 2011
  85. english

    attract suffixes of adj, noun, adv, verb

    asked on September 13, 2015
  86. MATH

    Find the interest earned by an account with $1,200 of simple interest of 4% for 3 years. Find the percent markup. Round to the nearest whole percent. store's cost: $100 selling price: $160 Find the percent of increase. 50 to 70 Find the percent of

    asked on January 10, 2014
  87. chemistry

    use standard enthalpies of formation to calculate delta Hrxn for the following reaction. 2H2S(g)+3O2(g)-->2H2O(l)+2SO2(g) express the answer using four significant figures Delta Hrxn = ? kJ

    asked on October 25, 2011
  88. how to write a check

    this is my second time writing a check, and I know how, but How do i write $1,464.00 in words on a check. Is it "one thousand four hundred sixty four dollars" Is it hundred or hundreds? Do I need to say something about the zero cents?

    asked on May 19, 2008
  89. Finance

    Sheet Metals has an outstanding loan that calls for equal annual payments of $12,600.47 over the life of the loan. The original loan amount was $72,000 at an APR of 8.15 percent. How much of the third loan payment is interest? $5,868.00 $4,725.89 $4,896.48

    asked on February 5, 2017
  90. chem 15

    A bottle of a certain ceramic tile cleanser, which is essentially a solution of hydrogen chloride, contains 130 g of HCl and 750 g of water. What is the percent by mass of HCl in this cleanser?

    asked on November 8, 2016
  91. Physics

    a force of 48.0N is required to start a 5.Okg box moving across a horizonatl concrete floor.what is the coefficient of static friction between the box and the floor?If the 48.0-N force continues, the box accelerates at 0.70 m/s squared . What is the

    asked on February 15, 2011
  92. physics

    A horizontal pipe has a cross sectional area of 40.0 cm^2 at the wider portions and 10.0 cm^2 at the constriction. Water is flowing in the pipe, and the discharge from the pipe is 6.00*10^-3 m^3/s(6.00 L/s). Find (a) the flow speeds at the wide and the

    asked on November 13, 2007
  93. physics

    A sensitive gravimeter at a mountain observatory finds that the free-fall acceleration is 0.0070m/s2 less than that at sea level (gsealevel = 9.83 m/s2). What is the observatory's altitude? Assume Rearth = 6.37 × 106 m.

    asked on February 11, 2015
  94. word problem

    The half life of cesium-137 is 30 years. Suppose we have a 10-g sample. a)Find a function that models the mass remaining after t years. b)How much of the sample will remain after 80 years? c)After how long will only 2 g of the sample remain? Thanks (a)

    asked on February 14, 2007
  95. English

    "Christina Nehring makes allusions to classical myths and 18th and 19th century writers in her essay "Fideltiy with a Wandering Eye". How do these allusions support her argument about women and sex? ALSO How effective are these allusions"

    asked on February 29, 2012
  96. Social studies

    5. What effect on the Columbian exchange does this image illustrate? (A). The population boom of domesticated animals that escaped into the wild. (B). The conversion of the physical environment.*** (C). The introduction of milk cows to the North Americans

    asked on September 13, 2017
  97. math

    A handful of paper clips is 5.2 grams. A handful of push pins is 500 centigram a. Which handful weighs more? So 1c equals .o1 grams so isn't it 5.2 g compared to .05 grams which then means the paper clips are heavier? Thx for any help you can provide.

    asked on April 9, 2015
  98. chemistry

    use standard enthalpies of formation to calculate delta Hrxn for the following reaction. 2H2S(g)+3O2(g)-->2H2O(l)+2SO2(g) express the answer using four significant figures Delta Hrxn = ? kJ

    asked on October 25, 2011
  99. Physics

    A car accelerates from 0 to 60 miles per hour in 6.5 seconds. Determine the distance traveled in this time and the acceleration. Assume constant acceleration.

    asked on September 22, 2011
  100. Chemistry

    how much CuSO4.5H2O is required to prepare 100 ml of a .050M aqueous stock solution?

    asked on March 15, 2010


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