1. Physics

    A biotech company produces a solution with an active biomass of 8.7604x10^6 cells per litre of solution. The solution is shipped by tanker truck with a volume of 4.16462x10^1 m3. How many cells are being sent per shipment, expressed to three significant

    asked by stacy on October 3, 2010
  2. Chemistry

    Question: A 0.400 g sample of propionic acid was dissolved in water to give 50.00 mL of solution. This solution was titrated with 0.150 M NaOH. what was the pH of the solution when the equivalence point was reached? I'm not really sure how i would go about

    asked by Eliz on April 15, 2009
  3. Chemistry

    A chemist has 250.0 mL of a bright blue (caused by Cu+2) aqueous solution that contains 21.16 g of CuCl2. He adds 12.0 g of finely ground silver to the blue solution and lets the solution sit covered overnight. When he returns he finds:

    asked by Anonymous on October 10, 2011
  4. chemistry

    Assume that 50ml of 0.01M edta solution were added to 25ml of co solution and the excess edta required 20ml of 0.005M mg solution. Calculate ppm co+ present. The answer 942ppm Bob helps me

    asked by Fai on March 2, 2013
  5. Chemistry

    What mass of solid sodium acetate, NaCH3COO, must be added to 2.50 L of an aqueous solution of 0.55 M acetic acid, CH3COOH, in order to make a buffer solution whose pH is 4.50? Assume that adding the solid does not change the volume of the solution.

    asked by Dee on December 15, 2012
  6. Chemistry--PLEASE HELP

    A solution of 220mL of 0.200M Koh is mixed with a solution of 120mL of 0.240M NiSO4. 1.Determine limiting reactant? 2.Calculate the mass of precipitate formed? 3.Calculate the molarity of all ions left in the solution?

    asked by anonymous on October 9, 2011
  7. chemistry

    calculate final volume required to reach 1% solution when 0.2g of sample is predigested with nitric acid 3mL then after 1day, if 1ml sample from this solution is digested in 10ml solution and diluted in 50 mL distilled water.

    asked by tomas on March 20, 2011
  8. chemistry

    A solution of 220mL of 0.200M Koh is mixed with a solution of 120mL of 0.240M NiSO4. 1.Determine limiting reactant? 2.Calculate the mass of precipitate formed? 3.Calculate the molarity of all ions left in the solution?

    asked by anonymous on October 9, 2011
  9. Chemistry

    A solution of 220mL of 0.200M Koh is mixed with a solution of 120mL of 0.240M NiSO4. 1.Determine limiting reactant? 2.Calculate the mass of precipitate formed? 3.Calculate the molarity of all ions left in the solution?

    asked by anonymous on October 9, 2011
  10. Chemistry

    You weigh out 196.07mg ferrous ammounium sulfate (FW 392.14) to prepare 250mL of solution which is 0.002M with respect to that compound. The salt is quantitatively transferred into a 250mL volumetric flask and 8mL of 3M H2SO4 is added and then diluted to

    asked by Ken on December 7, 2011
  11. Physics

    A train travels between stations 1 and 2. The engineer of the train is instructed to start from rest at station 1 and accelerate uniformly between points A and B, then coast with a uniform velocity between points B and C, and finally accelerate uniformly

    asked by Please help this time?? Becca on September 17, 2006
  12. chemistry

    What is th pH of a buffer solution made by dissolving 0.10 mol of formic acid, HCOOH, and 0.10 mol of sodium formate, HCOONa, in 1L of water? What is the molarity of a solution made by dissolving 3.4g of Ba(OH)2 in enough water to make 450mL of solution?

    asked by Taylor on November 18, 2009
  13. chemistry

    hello this is ellie again. I need help on this one problem A solution of 0.314M KOH is used to neutralize 10.0mL H3PO4 solution. H3PO4(aq) + 3KOH(aq) โ†’ K3PO4(aq) + 3H2O(l) If 29.3mL KOH solution is required to reach the endpoint, what is the molarity of

    asked by ellie on December 3, 2013
  14. Algebra

    A chemist mixed a 70% alcohol solution with a 30% alcohol solution to make a 45% alcohol solution. How many liters of each were used to make 120 L of a 45% solution? I tried solving this with elimination method and made two separate equations. For

    asked by Annie on May 20, 2016
  15. chem

    what is a liquid solution and a gaseous solution? [define plz] liquid solution: sea water gas solution: air i don't need examples. i need definitions. they are not in my book. a liquid solution is a mixture of atoms/ions/chemicals, etc. dissolved in water.

    asked by revie on May 15, 2007
  16. College Chemistry Lab

    Suppose that a 2.50x10^-6M solution of red dye No. 2 had an absorbance of 0.585 at its wavelength of maximum absorbance. A second solution of red dye No. 2 is too concentrated to read its absorbance so 5.00 mL of the concentrated dye solution was diluted

    asked by L** on March 16, 2010
  17. space

    What is the force of gravity at 220 miles above Earth's surface? Calculate how much of a g force the astronauts are actually experiencing. The solution for this math problem is a percentage. You can calculate it using the Algebraic equation: gr = R2/r2 x g

    asked by Annie on January 21, 2010
  18. CHEMISTRY

    Equilibrium Equation with Partial Pressures PCl3(g) +Cl2(g) PCl5(g)? An equilibrium mixture of PCl5(g), PCl3(g), and Cl2(g) has partial pressures of 217.0 Torr, 13.2 Torr, and 13.2 Torr, respectively. A quantity of Cl2(g) is injected into the mixture, and

    asked by Kylie on March 9, 2012
  19. Chemistry

    2. You have a sugar solution (solution A) with concentration x. You pour one-fourth of this solution into a beaker, and add an equivalent volume of water (solution B). a) What is the ratio of sugar in solutions A and B? b) Compare the volumes of soutions A

    asked by Jon on January 13, 2007
  20. chemistry

    Hey, can somebody here help me with this stuff? 1) Why are radioisotopes with long half-lives not administered internally in medical procedures? 2) What % of C-14 would you expect a piece of 34000 year-old fossilized bone from a mastodon to have when

    asked by Roger on January 2, 2007
  21. math

    You have just received advertisements from 2 companies in your area: Greener Lawns and Lawns for Less. Greener Lawns charges an initial fee of $200, plus $50 per hour for labor costs. Lawns for Less charge an initial fee of $300, plus $25 per hour for

    asked by tammy on March 13, 2011
  22. "le Chat. principle".

    Hey, can you check this, this is regarding "le Chat. principle". Thanks! #1) The value of the equilibrium constant for the reaction H2CO3(aq) + energy >>> H2O(l) + CO2(g) can be changed by introducing a change to which component of the equation? My answer:

    asked by Dave on July 19, 2006
  23. Chemistry!!

    A chemist wants to prepare a stock solution of H2SO4 so that a sample of 20.00mL will produce a solution with a concentration of .50 M when added to 100.0mL of water. A)what should the molarity of the stock solution be? B)If the chemist wants to prepare

    asked by Anonymous on April 22, 2013
  24. Chem 1

    Use the following data (in kJ/mol) to estimate the standard enthalpy of formation (in kJ/mol) for hypothetical compound CsF2 in the solid state. Lattice energy of CsF2 -2347 First ionization energy of Cs 375.7 Second ionization energy of Cs 2422 Electron

    asked by Rossina on November 1, 2006
  25. Calculus (Limits)

    If g(x) is continuous for all real numbers and g(3) = -1, g(4) = 2, which of the following are necessarily true? I. g(x) = 1 at least once II. lim g(x) = g(3.5) as x aproaches 3.5. III. lim g(x) as x approaches 3 from the left = lim g(x) as x approaches

    asked by Mishaka on October 22, 2011
  26. Calculus

    If g(x) is continuous for all real numbers and g(3) = -1, g(4) = 2, which of the following are necessarily true? I. g(x) = 1 at least once II. lim g(x) = g(3.5) as x aproaches 3.5. III. lim g(x) as x approaches 3 from the left = lim g(x) as x approaches

    asked by Mishaka on October 22, 2011
  27. Math

    1. Which of these numbers can be classified as both real and irrational? 5.858585858 63.4 square root 21 ** square root 36 2. Which is both a real number and an integer? 23 ** 1 over 4 square root 27 3.402538 3. Which of these numbers is classified as both

    asked by Cassidy on October 17, 2016
  28. economics

    At an initial point on the aggregate demand curve, the price level is 100, and real to GDP is $15trillion. After the price level rises to 110, however, there is an upward movement along the aggregate demand curve, and real GDP declines to $14 trillion. If

    asked by Tina on July 9, 2011
  29. math

    According to the center of Science in the Public Interest, the maximum healthy weight for a person who is 5 feet, 5 inches is 150 pounds and the maximum healthy weight for a person 6 feet, 3 inches tall is 200 pounds. The relationship between weight and

    asked by guitarman on March 29, 2010
  30. AP Chem

    A student chemist named Hannah Montana set up an electrical conductivity tester similar to that shown on page 141 and conducted an experiment involving two clear, colorless liquids, identified as solution A and solution B. Solution A and Solution B are

    asked by dylan on October 11, 2010
  31. algebra

    geometric dot pattern. 1+2+...+80 I'm not sure what the question is, to add up the numbers from 1 to 80? If it is this is an extremely old problem. If you use the progression o 1 dot____ ..o ..oo 3 dots___ .....o .....oo .....ooo .....oooo 4dots____ the

    asked by jaznai on September 12, 2006
  32. Algebra II

    What is the domain of y = 2/(x) + 2 x>0 x=0 All real numbers except x = 0 I think the domain is All real numbers except x = 0 Is that correct?

    asked by Matt- on November 1, 2010
  33. Algebra

    What is the domain of y = 2/(x) + 2 x>0 x=0 All real numbers except x = 0 I think the domain is All real numbers except x = 0 Is that correct?

    asked by Matt- on November 2, 2010
  34. Algebra

    Please check this. f(x)= 1/(x-1)^2 - 5 D= all real numbers, x does not equal to -5 R= all real numbers, y does not equal to 1

    asked by Anonymous on August 17, 2015
  35. physics

    A stone is thrown vertically upward. On its way up it passes point A with speed, v and point B, 3 m higher than A, with speed 1/2v. Calculate a) the speed v and b) the max height reached by the stone above point B. I can't find the equation You need to

    asked by jenny on September 17, 2006
  36. Algerbra

    A homeowner wanted to improve the value of his home by putting tile flooring in three of his rooms. He researched the different types of tile and decided on two types: ceramic tile and decorative tile. He found that he could purchase the ceramic tile for

    asked by Anonymous on August 10, 2010
  37. Physics

    Under what conditions can a quadratic function be a perfect square? Also.. A stone is thrown vertically upward at a speed of 40m/s. How long does it take to reach a height of 90m? I ended up with a quadratic of t^2-8t+18 which cannot be factored...So is

    asked by Anonymous on February 19, 2008
  38. Physics

    Under what conditions can a quadratic function be a perfect square? Also.. A stone is thrown vertically upward at a speed of 40m/s. How long does it take to reach a height of 90m? I ended up with a quadratic of t^2-8t+18 which cannot be factored...So is

    asked by Anonymous on February 19, 2008
  39. BLD 414

    A liquid solution of formaldehyde is 37.0% pure. This solution has a specific gravity of 1.037. The molecular weight of formaldehyde is 30.0. to 1.00 ml of this impure stock solution is added quantity sufficient to take the total volume to 500ml. If 1.00

    asked by Amber` on March 19, 2012
  40. Chem Lab Math!

    A liquid solution of formaldehyde is 37.0% pure. This solution has a specific gravity of 1.037. The molecular weight of formaldehyde is 30.0. to 1.00 ml of this impure stock solution is added quantity sufficient to take the total volume to 500ml. If 1.00

    asked by Morgan M on March 18, 2012
  41. chemistry

    0.5 L of a 0.30 M HCl solution is titrated with a solution of 0.6 M KOH. a)What is the pH before addition of KOH? b)What is the total number of moles of acid? c)What is the pH after addition of 125 mL of KOH solution? d)What volume of the KOH solution is

    asked by Joe on April 28, 2011
  42. math

    A rental car company charges a fixed fee of $15.00 plus $.12 per mile. Write an equation to find the total cost, y, for any number of miles, x

    asked by jara on March 31, 2019
  43. chem

    if 2.19e-9 mol of 176-W emits 1.07e15 beta particles in 1 hour. what is the decay constant? how do i go about doing this? i know the equation 0.693=kt(1/2) but i don't think that is helpful here

    asked by sara on September 16, 2014
  44. Maths

    1. Show that k=15 is congruent integer. where 0.5xy=km^2, x=r(u^2 - v^2) y=r(2uv) z=r(u^2 + v^2) x^2 + y^2 = z^2 2. how i solve Pell's equation using bhaskara II then brahmagupta method for x^2 - 67y^2 =1 Please help, exam on monday... :)

    asked by Elven on May 6, 2017
  45. Chemistry

    Assume that 7.2 L of I2 are produced at STP according to the following balanced equation: 2KI+Cl - 2KCl+ I2 How many grams of KI (MOLAR MASS=166.002G/MOL) reacted

    asked by Valerie on January 15, 2013
  46. math

    a car rental company charges a flat rate of $29 per day and an additional $0.15 per mile. Write an equation to model the total charge

    asked by hannah on December 10, 2013
  47. chemistry

    Consider the equation A(aq) + 2B(aq) 3C(aq) + 2D(aq). In one experiment, 45.0 mL of 0.050 M A is mixed with 25.0 mL 0.100 M B. At equilibrium the concentration of C is 0.0410 M. Calculate K. a) 7.3 b) 0.34 c) 0.040 d) 0.14 e) none of these the answer for

    asked by raf on April 4, 2011
  48. Chemistry

    I have 3 Fe (s) + 4 (H2O) (g) reacts with FeO4 (s) + 4 H2 (g) How many g of steam and iron must react to produce 375 g of magnetic oxide Fe3O4 ? I need help trying to figure out how to write the equation please

    asked by June on October 27, 2014
  49. math

    Find the coefficient of determination and the standard error estimate for the regression equation fitting each of the following data sets.interpret the result in each case x:-3,-2,-1,0,1,2,3 y:-1,0,1,2,5,6,8

    asked by naa on September 15, 2016
  50. chemistry

    Assume that 7.2 L of I2 are produced at STP according to the following balanced equation: 2KI+Cl - 2KCl+ I2 How many grams of KI (MOLAR MASS=166.002G/MOL) reacted

    asked by Valerie i need it ASAP on January 15, 2013
  51. Pre-Calculus

    Find the equation of the ellipse whose semi-major axis has length 6 and whose foci are at (3,-2+/-sqrt11). I have the focal constant = 2a which means that a=3 but don't know how to proceed. Thanks.

    asked by Lucy on October 12, 2008
  52. math

    a technician charges $75.00 for consult plus $35.00 per hour. write an equation for the function. what are the variables represent and find the number of hours if he charged you $285.

    asked by shelly on November 5, 2017
  53. chemistry

    How to balanced chemical equation and identify the type of reaction for solid ammonium nitrate decomposes into dinitrogen monoxide gas and water

    asked by judy on February 1, 2017
  54. chemistry

    when propane gas C3H8, is burned with oxygen, the products are carbon dioxide and water. Write an unbalanced formula equation for the reaction.

    asked by kate on February 3, 2009
  55. calculus

    find the positive roots of the equation 2x^3-5x^2+6=0 and evaluate the function y=500x^6 at each root. round you answers to the nearest integer, but only in the final step.

    asked by maritza on November 22, 2010
  56. Chemistry

    Write a balanced chemical equation that represents the self-ionization of water. (Use the lowest possible coefficients. Include states-of-matter at 1 atm and 25ยฐC in your answer.)

    asked by Grace on April 2, 2014
  57. Physics

    A particle moves according to the equation x(t) = (10 m/s2) t2 where x is in meters and t is in seconds. Find the average velocity for the time interval from t1 = 2.0 s to t2 = 3 s. Answer in units of m/s. Please help! I have no idea how to set this up :(

    asked by Christie on September 7, 2014
  58. Chemistry

    I am having trouble in calculating equilibrium concentrations. Where I get stuck will be at the end where I have to square root both sides and get the value of x to plug in the equation to get the individual concentration of every substance.

    asked by Rosa on March 18, 2008
  59. Trig

    2cos^2Beta-Cosbeta=0 (find all solutions for the equation in the interval 0, 2 pi). I have no idea how to go about doing this. Do you isolate the beta on one side? Would you be able to show me how and I'll solve for you to check?

    asked by Janie on January 24, 2010
  60. Calculus

    Hi, I'm absolutely stuck on this problem. This is for a newton's method/linearization unit. Find an equation for the curve in the xy-plane that passes through the point (1,-1) if its slope at x is always 3x^2+2.

    asked by Jay on January 1, 2011
  61. maths help needed!

    Hi, just a short question. How do i find the x intercepts for the equation y=-2x^3+1 ? I tried to let y equal zero but i could only get as far as x^3=1/2 please help! x^3 = 1/2 is correct. There is only ine x-intercept. It is where x = (1/2)^(1/3) which

    asked by elle on March 5, 2007
  62. chemestry

    I need serious help on this....please help guys.. i've to turn it in in an hours... Balance th following equation in acid Solutiong and determind if it is spontaneous under standard conditions. NO3^-1 + Sn^+2 ---> NO + Sn^+4 Please do not post duplicates.

    asked by bik on May 16, 2007
  63. AP Calc-easy ?

    Given: f(x)= x^3 + x^2 - 2x over the closed interval [0,2] Write the equation of the tangent line to f(x) passing through point A(-1,-2). *At first glance I knew how to do it, but f(-1) does not equal -2...so do I add a constant onto f(x) to make f(-1) =

    asked by blondie07 on March 7, 2007
  64. Algebra

    Solve each system graphically. #6. 4x - y = 9 x - 3y = 16 I need to find at least one pair of points that fit. I tried using the elimination method and got (5 and 6/7, -22), which did not even work for the first equation. I also tried graphing it but it

    asked by Suzanne on February 18, 2009
  65. CHEMISTRY

    What volume of H2 would be obtained at 27 degrees Celsius and 1.0 atm if 35.0 g of Fe reacts with 0.75 mil of H2SO4? Equation: 2Fe + 3H2SO4 = 3H2 + Fe2(SO4)3

    asked by bm24 on August 23, 2018
  66. Chemistry

    Write a balanced chemical equation and determine the enthalpy of combustion for carbon in the diamond allotropic form. Is this the correct chemuc eq? C + O2 ----> CO2?

    asked by Lana on January 14, 2016
  67. Algebra

    You borrow $40 from your sister. To repay the loan, you pay her $5 a week. Write a linear equation to model the situation and check with unit alalysis.

    asked by Qwerty on November 13, 2011
  68. Chemistry

    Calculate ฮ”G (in kJ) at 298 K for some solid ZnF2, 0.055 M Zn2+ and 0.063 M F-(aq). I found Q to be 2.18e-4, then i implemented it into the equation deltaG=RT(lnQ). I got -20.89, but the answer is -12.2.

    asked by JUNDY on April 7, 2015
  69. algebra

    solve the system by the method of substitution x-4y=-21 3x+y=2 I got (0,2) Try plugging in x=0 and y=2 into your first equiation and uopu will that your answer must be wrong. Do it this way: x - 4y =-21 12x+ 4y =8 13 x = -13 x = -1 y = 2 - 3x = ? x=0 and

    asked by Rose on December 14, 2006
  70. Beginning Algebra

    how do i figure out this problem i have to make the equation true by inserting one or more parenthesis a. 2 * 3^2 + 4 * 3 - 1 = 47 For this a. 2 * 3^2 + 4 * 3 - 1 = 47 You need a fairly large number compared with the available numbers, so you might try

    asked by Eliana on September 27, 2006
  71. chemistry

    3. Complete the following word equation and write the balanced formula equations: a. Zinc(s) + iodine(g) b. Hydrogen peroxide(l) c. Magnesium(s) + lead(IV) nitrate(aq)

    asked by Anonymous on March 4, 2012
  72. Microeconomics

    Consider a single price monopoly that faces a market demand curve for a good is given by the equation ๐‘ƒ=100โˆ’.1๐‘„ and the total cost function is given as ๐‘‡๐ถ=1000+20๐‘„+.4๐‘„2.

    asked by Ella on September 12, 2016
  73. General Mathematics

    The value of your property is rising by 100,000 per year. If it is worth 1.5 million today what will it be in 10 years? Finding the equation of the problem using exponential form.

    asked by Anonymous on July 18, 2018
  74. anayltical chemistry

    I have tried and tried to use the henderson-hasselbalch equation for this problem, but i do not understand how to plug in the data: how much ammonium sulfate should be added to 500mL of .3M ammonia to produce a buffer with a pH of 9.?

    asked by joey on November 22, 2010
  75. Chemistry

    Assume that 7.2 L of I2 are produced at STP according to the following balanced equation: 2KI+Cl - 2KCl+ I2 How many grams of KI (MOLAR MASS=166.002G/MOL) reacted

    asked by Valerie on January 15, 2013
  76. algebra

    How to put this math problem in power point presentation. Evaluate both expressions by using R= 120 and s = 200 : Find the LCD of the terms in the equation.

    asked by faith on August 20, 2011
  77. College Chem

    Based on the balanced equation 4Na + O2 โ†’ 2Na2O calculate the number of Na2O formula units formed when 60 Na atoms and 10 O2 molecules react? Thanks.

    asked by Lance on April 15, 2012
  78. College Chem

    Based on the balanced equation 4Na + O2 โ†’ 2Na2O calculate the number of Na2O formula units formed when 60 Na atoms and 10 O2 molecules react? Thanks.

    asked by Lance on April 15, 2012
  79. Reposting Chemistry College

    Based on the balanced equation 4Na + O2 โ†’ 2Na2O calculate the number of Na2O formula units formed when 60 Na atoms and 10 O2 molecules react? Thanks.

    asked by Lance on April 15, 2012
  80. Math

    A piano tuner uses a tuning fork. If middle C has a frequency of 264 vibrations per second, write an equation in the form for the simple harmonic motion.

    asked by Lisa on October 9, 2006
  81. chemistry

    Using the balanced equation, determine the number of NaNO3 units in the visualization in the reaction. 3Ca(NO3)2(aq) + 2Na3PO4(aq) โ†’ 6NaNO3(aq) + Ca3(PO4)2(s)

    asked by eng on January 20, 2010
  82. Chemistry

    Assume that 7.2 L of I2 are produced at STP according to the following balanced equation: 2KI+Cl - 2KCl+ I2 How many grams of KI (MOLAR MASS=166.002G/MOL) reacted

    asked by Valerie on January 15, 2013
  83. Chemistry

    Write a net ionic equation for the overall reaction that occurs when aqueous solutions of potassium hydroxide and oxalic acid (H2C2O4) are combined.

    asked by Adriana on September 28, 2016
  84. Chemistry

    Why was the tert butyl chloride washed with aqueous sodium hydrogen carbonate? what gas was evolved during the washing? Write a balance equation

    asked by Issac on September 30, 2017
  85. Math

    Approximate the equation's solutions in the interval (0,2pi). sin2x sinx = cosx I know that I should work on the left side first. I know how to solve for the intervals but I am just not sure how to start this off.

    asked by Hannah on March 1, 2010
  86. Algebra

    If the trend for the growth in the median home value continues=d, what would be its value in the year 2007? show how you obtained your answer using the linear equation you found in part c).

    asked by Jewel on June 7, 2012
  87. Chem

    The value of ฦ’ยขHยโ€น for the reaction below is -482 kJ. Calculate the heat (kJ) released to the surroundings when 12.0 g of CO(g) reacts completely. 2CO(g) + O2(g) ยยจ 2CO2(g) *I just want to how to solve this problem as in an equation, not the answer.

    asked by Harlem on June 8, 2012
  88. college chemistry

    At 625 K the value of Kc for the equilibrium represented by the balanced equation is 2.50 x 100. Calculate the value of Kp at the same temperature. Express answer in scientific notation. 2NH3(g) = N2(g)+3H2(g)

    asked by sparkle on October 4, 2010
  89. Algebra

    okay- i definetly don't remember how to do this: Give an ordered pair(a,b)of numbers that satisfy the equation: 6a+b=8 Common sense says that a = 1 (6 x 1 = 6) b = 2 6 + 2 = 8 omigosh.. im dumb.. lol - ok thanks!

    asked by Briana on January 21, 2007
  90. algebra

    1) a line has a slope of 5. it passes through the points (1,4) and (6,y). what is the value of y? explain how you found your answer. 2) write a direct variation equation that relates x miles to y kilometers.

    asked by hailey on May 19, 2015
  91. AP physics

    According to the equation a=bc what type of relationship (direct or inverse) exerts between the quantities A and C? Draw a qualitive graph to describe the relation between A and C. Assumeing B is constante.

    asked by Help on October 2, 2016
  92. College Chemistry

    Please help me. I have worked on this for 2 days. I don't understand the ratio of this equation.4Na+O2 to 2Na2O. for question: How many grams of Na2O are produced when 81.ograms of Na reacts?

    asked by Linda on March 7, 2014
  93. Parametric derivatie help plz

    Find the equation of the line tangent to the parametric curve define by x=cos2t and y=sin3t and t=pi/12 plz i don't no where to start from show working

    asked by Collins on October 28, 2015
  94. chemistry need help so bad seriously help plz

    Use Rydbuz equation to calculate the wavelength of the third line in the paschen series of the hydrogen spectrum.give ur answer in Nm. RH=2.18 * 10^-18j, H=6.63 * 10^-34J. Plz help m

    asked by weyeremi on March 30, 2017
  95. chemistry

    I need to write an equation that takes place at a temp of 400 K and with a catalyst of iron to make ammonia gas from gaseous nitrogen and hydrogen

    asked by sheila on May 21, 2011
  96. Chemistry

    Write the molecular equation for the combination of aqueous solutions of sodium chloride and silver nitrate. Enter your answer as the sum of all coefficients.

    asked by Melinda on October 10, 2012
  97. Chemistry

    Write an equation that represents how dihydrogen phosphate ion (H2PO4-) behaves as an Arrhenius acid. ( Be sure to include the correct charges for ions.)

    asked by Michelle on April 21, 2013
  98. Chemistry

    Help with the equation for the synthesis 2-chlorobutane from 1-butene and hydrogen chloride for bromobenzene from benzene and bromine I came up with 1C6H6+1Br2->1C5H6Br+1HBr is this correct?

    asked by mary on June 8, 2010
  99. PHYSICS!!!

    A net force of 30 N is applied to a 10 kg object, which starts at rest. What is the magnitude of its momentum after 3.0 seconds? Can someone please explain this as you go through the steps? I already know the equation is p=mv and I know that mass is 10kg

    asked by Christina on June 2, 2012
  100. More trig

    Use the Quadratic Formula to solve the equation in the interval [0,2pi). Then use a graphing utility to approximate the angle x. (1) 5/(tanx+secx) (2) 4cos^2x-4cosx-1=0 Thank you.

    asked by Poindexter on November 17, 2008

Pages

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20
  21. 21
  22. 22
  23. 23
  24. 24
  25. 25
  26. 26
  27. 27
  28. 28
  29. 29
  30. 30
  31. 31
  32. 32
  33. 33
  34. 34
  35. 35
  36. 36
  37. 37
  38. 38
  39. 39
  40. 40
  41. 41
  42. 42
  43. 43
  44. 44
  45. 45
  46. 46
  47. 47
  48. 48
  49. 49
  50. 50
  51. 51
  52. 52
  53. 53
  54. 54
  55. 55
  56. 56
  57. 57
  58. 58
  59. 59
  60. 60
  61. 61
  62. 62
  63. 63
  64. 64
  65. 65
  66. 66
  67. 67
  68. 68
  69. 69
  70. 70
  71. 71
  72. 72
  73. 73
  74. 74
  75. 75
  76. 76
  77. 77
  78. 78
  79. 79
  80. 80
  81. 81
  82. 82
  83. 83
  84. 84
  85. 85
  86. 86
  87. 87
  88. 88
  89. 89
  90. 90
  91. 91
  92. 92
  93. 93
  94. 94
  95. 95
  96. 96
  97. 97
  98. 98
  99. 99
  100. 100
  101. 101
  102. 102
  103. 103
  104. 104
  105. 105
  106. 106
  107. 107
  108. 108
  109. 109
  110. 110
  111. 111
  112. 112
  113. 113
  114. 114
  115. 115
  116. 116
  117. 117
  118. 118
  119. 119
  120. 120
  121. 121
  122. 122
  123. 123
  124. 124
  125. 125
  126. 126
  127. 127
  128. 128
  129. 129
  130. 130
  131. 131
  132. 132
  133. 133
  134. 134
  135. 135
  136. 136
  137. 137
  138. 138
  139. 139
  140. 140
  141. 141
  142. 142
  143. 143
  144. 144
  145. 145
  146. 146
  147. 147
  148. 148
  149. 149
  150. 150
  151. 151
  152. 152
  153. 153
  154. 154
  155. 155
  156. 156
  157. 157
  158. 158
  159. 159
  160. 160
  161. 161
  162. 162
  163. 163
  164. 164
  165. 165
  166. 166
  167. 167
  168. 168
  169. 169
  170. 170
  171. 171
  172. 172
  173. 173
  174. 174
  175. 175
  176. 176
  177. 177
  178. 178
  179. 179
  180. 180
  181. 181
  182. 182
  183. 183
  184. 184
  185. 185
  186. 186
  187. 187
  188. 188
  189. 189
  190. 190
  191. 191
  192. 192
  193. 193
  194. 194
  195. 195
  196. 196
  197. 197
  198. 198
  199. 199
  200. 200
  201. 201
  202. 202
  203. 203
  204. 204
  205. 205
  206. 206
  207. 207
  208. 208
  209. 209
  210. 210
  211. 211
  212. 212
  213. 213
  214. 214
  215. 215
  216. 216
  217. 217
  218. 218
  219. 219
  220. 220
  221. 221
  222. 222
  223. 223
  224. 224
  225. 225
  226. 226
  227. 227
  228. 228
  229. 229
  230. 230
  231. 231
  232. 232
  233. 233
  234. 234
  235. 235
  236. 236
  237. 237
  238. 238
  239. 239
  240. 240
  241. 241
  242. 242
  243. 243
  244. 244
  245. 245
  246. 246
  247. 247
  248. 248
  249. 249
  250. 250
  251. 251
  252. 252
  253. 253
  254. 254
  255. 255
  256. 256
  257. 257
  258. 258
  259. 259
  260. 260
  261. 261
  262. 262
  263. 263
  264. 264
  265. 265
  266. 266
  267. 267
  268. 268
  269. 269
  270. 270
  271. 271
  272. 272
  273. 273
  274. 274
  275. 275
  276. 276
  277. 277
  278. 278
  279. 279
  280. 280
  281. 281
  282. 282
  283. 283
  284. 284
  285. 285
  286. 286
  287. 287
  288. 288
  289. 289
  290. 290
  291. 291
  292. 292
  293. 293
  294. 294
  295. 295
  296. 296
  297. 297
  298. 298
  299. 299
  300. 300
  301. 301
  302. 302
  303. 303
  304. 304
  305. 305
  306. 306
  307. 307
  308. 308
  309. 309
  310. 310
  311. 311
  312. 312
  313. 313
  314. 314
  315. 315
  316. 316
  317. 317
  318. 318
  319. 319
  320. 320
  321. 321
  322. 322
  323. 323
  324. 324
  325. 325
  326. 326
  327. 327
  328. 328
  329. 329
  330. 330
  331. 331
  332. 332
  333. 333
  334. 334
  335. 335
  336. 336
  337. 337
  338. 338
  339. 339
  340. 340
  341. 341
  342. 342
  343. 343
  344. 344
  345. 345
  346. 346
  347. 347
  348. 348
  349. 349
  350. 350
  351. 351
  352. 352
  353. 353
  354. 354
  355. 355
  356. 356
  357. 357
  358. 358
  359. 359
  360. 360
  361. 361
  362. 362
  363. 363
  364. 364
  365. 365
  366. 366
  367. 367
  368. 368
  369. 369
  370. 370
  371. 371
  372. 372
  373. 373
  374. 374
  375. 375
  376. 376
  377. 377
  378. 378
  379. 379
  380. 380
  381. 381
  382. 382
  383. 383
  384. 384
  385. 385
  386. 386
  387. 387
  388. 388
  389. 389
  390. 390
  391. 391
  392. 392
  393. 393
  394. 394
  395. 395
  396. 396
  397. 397
  398. 398
  399. 399
  400. 400
  401. 401
  402. 402
  403. 403
  404. 404
  405. 405
  406. 406
  407. 407
  408. 408
  409. 409
  410. 410
  411. 411
  412. 412
  413. 413
  414. 414
  415. 415
  416. 416
  417. 417
  418. 418
  419. 419
  420. 420
  421. 421
  422. 422
  423. 423
  424. 424
  425. 425
  426. 426
  427. 427
  428. 428
  429. 429
  430. 430
  431. 431
  432. 432
  433. 433
  434. 434
  435. 435
  436. 436
  437. 437
  438. 438
  439. 439
  440. 440
  441. 441
  442. 442
  443. 443
  444. 444
  445. 445
  446. 446
  447. 447
  448. 448
  449. 449
  450. 450
  451. 451
  452. 452
  453. 453
  454. 454
  455. 455
  456. 456
  457. 457
  458. 458
  459. 459
  460. 460
  461. 461
  462. 462
  463. 463
  464. 464
  465. 465
  466. 466
  467. 467
  468. 468
  469. 469
  470. 470
  471. 471
  472. 472
  473. 473
  474. 474
  475. 475
  476. 476
  477. 477
  478. 478
  479. 479
  480. 480
  481. 481
  482. 482
  483. 483
  484. 484
  485. 485
  486. 486
  487. 487
  488. 488
  489. 489
  490. 490
  491. 491
  492. 492
  493. 493
  494. 494
  495. 495
  496. 496
  497. 497
  498. 498
  499. 499
  500. 500
  501. 501
  502. 502
  503. 503
  504. 504
  505. 505
  506. 506
  507. 507
  508. 508
  509. 509
  510. 510
  511. 511
  512. 512
  513. 513
  514. 514
  515. 515
  516. 516
  517. 517
  518. 518
  519. 519
  520. 520
  521. 521
  522. 522
  523. 523
  524. 524
  525. 525
  526. 526
  527. 527
  528. 528
  529. 529
  530. 530
  531. 531
  532. 532
  533. 533
  534. 534
  535. 535
  536. 536
  537. 537
  538. 538
  539. 539
  540. 540
  541. 541
  542. 542
  543. 543
  544. 544
  545. 545
  546. 546
  547. 547
  548. 548
  549. 549
  550. 550
  551. 551
  552. 552
  553. 553
  554. 554
  555. 555
  556. 556
  557. 557
  558. 558
  559. 559
  560. 560
  561. 561
  562. 562
  563. 563
  564. 564