1. History

    What was one way that Sam Houston tried to solve Texas' economic problems? he asked Great Britain for diplomatic recognition he borrowed from the United States he annexed a great deal of land he printed more money****

    asked by swimmer girl on November 16, 2017
  2. math

    Can someone help me how to solve it. A new medically approved wheelchair was considered to be an improvement over a standard wheelchair by 325 out of 450 patients in a survery. 20) What is the margin of error for the survey? Round your ansewer to the

    asked by Josh on August 21, 2012
  3. Distance Problems

    John took a drive to town at an average rate of 40mph. In te evening he drove back at 30mph. If he spent a total of 7 hours traveling, what is the distance traveled by John? Please set up the boxes and help solve.

    asked by Amir on November 4, 2008
  4. physics

    The distance between two consecutive nodes of a standing wave is 19.2 cm. The hand gen- eratingthe pulses movesupand downthrough a complete cycle 3.23 times every 5.9 s. Find the velocity of the wave. Answer in units of m/s how do I solve it? thanks!

    asked by DEANA on October 19, 2014
  5. Chemistry -- DrBob222

    A gas initially at STP is heated to 50°C keeping the volume constant. What is its new pressure? I used this formula: P1 = 1 atm T1 = 273 K T2 = 323 K solve for P2 P2 = P1 (T2/T1) But, where do I use the 50 degrees C? Also, is my answer correct: P2 = 1atm

    asked by Timofey on May 24, 2013
  6. Math

    Solve the problem. Round to the nearest cent. Joan wants to have $250,000 when she retires in 27 years. How much should she invest annually in her annuity to do this if the interest is 7% compounded annually? A) $1861.10 B) $3356.43 C) $2672.15 D) $937.86

    asked by Nick on March 26, 2014
  7. Pre-Calculus Help?

    A class is to eliminate t from the parametric equations x = t^2 + 3 and y = 4t. Beth says that she can write t = sqrt (x-3) to eliminate the parameter. Why is this wrong? A) She should have added 3 to x, not subtracted B) She should always solve for t as a

    asked by ADOG on May 18, 2018
  8. SCIENCE(PHYSICS)

    A TRAIN IS MOVING ON A STRAIGHT TRCK AND TRAVELS AT A SPEED OF 72KM/HR AND PASSES A POLE IN 3 SECONDS. FIND THE TIME TAKEN TO PASS A BRIDGE OF LENGTH 540m. PLEASE SOLVE THE QUESTION AND ANSWER IT AS I WAS NOT ABLE TO ANSWER IT.

    asked by YASH on May 23, 2011
  9. Precalculus

    I asked this yesterday but I was told my answer was incorrect by my professor. ln x^5 - ln x^2 = 3 solve for the unknown. I have reviewed my Log laws but yet I still cannot figure out what the answers are. The question asks for me to write all answers as a

    asked by George on January 24, 2013
  10. calculusI

    If $700 is borrowed at 8% interest, find the amounts due at the end of 2 years if the interest is compounded as follows. i know how to solve this problem but i don't know what to plug in for n in the formula for finding the amount quarterly and hourly. plz

    asked by britteny on October 16, 2007
  11. algebra

    a rectangular pool has an area of 880ft. the lenght is 10 feet longer than thw width. find the dimensions of the pool. solve by completing the square. round answer to the nearest tenth of a foot.

    asked by Anonymous on March 17, 2012
  12. algebra

    f the distance the car traveled after applying the brakes equals 20 feet, what does that mean to the officer investigating the accident? (HINT: Let d = 20, bring 20 to the right so that the equation equals zero, identify the coefficients, A, B and C and

    asked by alyssa on March 5, 2012
  13. algebra

    Create a unique example of dividing a polynomial by a monomial and provide the simplified form. Explain, in complete sentences, the two ways used to simplify this expression and how you would check your quotient for accuracy. please explain :/ i only

    asked by JoJo on July 6, 2011
  14. algebra

    f the distance the car traveled after applying the brakes equals 20 feet, what does that mean to the officer investigating the accident? (HINT: Let d = 20, bring 20 to the right so that the equation equals zero, identify the coefficients, A, B and C and

    asked by alyssa on March 5, 2012
  15. algebra

    f the distance the car traveled after applying the brakes equals 20 feet, what does that mean to the officer investigating the accident? (HINT: Let d = 20, bring 20 to the right so that the equation equals zero, identify the coefficients, A, B and C and

    asked by alyssa on March 5, 2012
  16. Trigonometry

    Solve the trigonometric equations. 1.) SIN²x(CSC²x-1) 2.) COT x SEC X 3.) COS²[(π/2)-x]/COS X (Note: These mathematical problems are somewhat tricky, but useful for students as of learning how to their fundamental identities. Let's enjoy solving these

    asked by AwesomeGuy on February 10, 2013
  17. Math

    How would you solve these compound inequalities word problems? 1. The human ear can distinguish sounds between 20Hz and 20,000 Hz, inclusive. 2. For a man to box as a welterweight, he must weigh more than 140 lbs, but at most 147 lbs.

    asked by Pam on September 29, 2013
  18. physics

    hi, if anyone could give me any sort of help on how to solve this problem i would greatly appreciate it. thank you. A 2.66 kg object placed on a frictionless horizontal table is connected to a string that passes over a pulley and then is fastened to a

    asked by miranda on September 13, 2009
  19. Basic Math

    How would I be able t find how many cubic centimeters in a cubic meter? What is the density of water using metric units? Convert: 3000 m to miles 32degrees F to C degrees 5.08 cm to inches I am not looking for you to give me the answers. Just tell me how I

    asked by Willy Wonka on July 12, 2011
  20. Calculus

    An explosion causes debris to rise vertically with an initial velocity of 160 feet per second. In how many seconds does it attain maximum height? i know i need to use the formula: y(t)=-16t^2+Vot + yo Have: vo=160 Yo= is what i am trying to find and i dont

    asked by Roger on February 23, 2017
  21. Algebra

    Please read and then help me! (x^(-3/5)) ----------- divide x ^ (1/5) I know the problem then needs to look like this: (x^(-3/5))(x^(-1/5)) (multiply the two above) Then it needs to look like this: (I can't write it though, so I'll tell you) The 5th root

    asked by Tammy on July 24, 2007
  22. History

    1. "Am I not a women and a sister" What were the ideals of the movement related to this medallion? a)abolition and suffrage****** b)freedom and abolition c)justice and temperance d)temperance and slavery 2. Which details from the poster suggest that giving

    asked by Laci ♥ on May 22, 2014
  23. Lab/Chemistry

    In lab, I weighed out and found the molarity of 1.108g Na2C2O4 and 1.100g K3Fe(C2O4)3. I titrated an average of 0.0335L of the sodium oxalate solution with KMnO4(potassium permanganate). I then titrated an average of 0.0169L of K3Fe(C2O4)3 X 3H2O with

    asked by Tricia on February 26, 2014
  24. Chemistry please help

    In lab, I weighed out and found the molarity of 1.108g Na2C2O4 and 1.100g K3Fe(C2O4)3. I titrated an average of 0.0335L of the sodium oxalate solution with KMnO4(potassium permanganate). I then titrated an average of 0.0169L of K3Fe(C2O4)3 X 3H2O with

    asked by Tricia on February 26, 2014
  25. chemistry

    REVISION TO PREVIOUS POST: What is the pH of the solution created by combining 1.90 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 ml of the 0.10 M HC2H3O2(aq)? I understood how to do the HC2H3O2, but I can't do the HCl. I am

    asked by Sara on July 11, 2010
  26. Biology

    Explain what would happen to a red blood cell placed in a solution of 99.3 percent water and 0.7 percent salt. and how can a small particle or liquid droplet enter a cell?

    asked by ineedsciencehelp on December 12, 2007
  27. chemistry

    which of the following was not one of the products when you titrated the vinegar solution with sodium hydroxide? HC2H3O2+NaOH===>NaC2H3O2+H2O a salt water sodium acetate acetic hydroxide

    asked by Anonymous on July 13, 2010
  28. math

    May takes 12 hours to type a report. Her friend helps her and together they finish the job in 4 hours. How long would it take her friend had she worked alone? Representation: Equation: Solution: Conclusion:

    asked by Tiffany on January 12, 2015
  29. ap chemistry

    the heat of neutralization for a strong acid in dilute water solution is about 60 kJ/mol of H+. What quantity of heat in kJ is produced when 100 mL of 3 M HCl is mixed with 100 mL of 1 M KOH?

    asked by Sarah on September 24, 2010
  30. Chemistry

    1,15g of a non-volatile compound is dissolved in 75,0g of benzene. The boiling point of the solution 0,125ºC has a value greater than the corresponding pure benzene. Calculate the molecular weight of the compound.

    asked by Anonymous on February 5, 2016
  31. Chemistry

    A solution is prepared by mixing 100 mL of 0.500 M NH3 and 100 mL of 0.500 M HCl. Assuming that the volumes are additive, what is the pH of the resulting mixture? kb for ammonia is 1.8x10-5

    asked by Chris on May 2, 2013
  32. Chemistry

    A solution is prepared by mixing 100 mL of 0.500 M NH3 and 100 mL of 0.500 M HCl. Assuming that the volumes are additive, what is the pH of the resulting mixture? kb for ammonia is 1.8x10-5

    asked by Chris on May 2, 2013
  33. Chemistry

    A compound is known to be a cesium halide, CsX. If 3.00 grams of the salt is dissolved in exactly 100.0 grams of water, the solution freezes at -0.735°C. What is the chemical formula for the salt?

    asked by Susy, PLEASE HELP on February 20, 2014
  34. Chem

    How many moles of NH3 must be added to 1.00 L of solution to dissolve 0.979 g of CuCO3? For CuCO3, Ksp = 2.3 × 10-10. Ignore hydrolysis of CO32-, but consider the formation of the complex ion Cu(NH3)42+.

    asked by lin on March 9, 2015
  35. chemistry

    Calculate the molar conc. Of ethanoate acid needed to prepare ethonoic buffer of ph 6.8 using 0.5 molar solution of sodium ethanoic.pka of acid 0..127

    asked by Anonymous on March 22, 2014
  36. AP Chemistry

    An aqueous antifreeze is 40.0% ethylene glycol (C2H6O2) by mass. The density of the solution is 1.05 g/cm3. Calculate the molality, molarity, and mole fraction of the ethylene glycol.

    asked by Angel on November 28, 2009
  37. chemistry

    How many grams of phosphoric acid can be made from 200 g of dichromate and 150 grams of hypophosphorous acid? (Performed in an acidic solution, Chromium III is one of the products)

    asked by Rae on October 10, 2012
  38. chemistry

    What is the % transmittance for each of these errors Washing a cuvette with DI water, then failing to rinse it with the solution to be measured Failing to wipe off fingerprints from the cuvette. Changing the wavelength from maxtomax+10 nm.

    asked by leah on January 26, 2009
  39. Math vectors

    Verify using an example that a(b+c) is not equal to ab+ac. (This means that addition does not distribute over the dot product.) My solution: is this correct? a(b+c)= ab+ac is ALWAYS true for whatever numbers you substitute let a = 16 b = 3 and c = 5 so LHE

    asked by Raymond on February 27, 2015
  40. Chemistry

    4.00L of water was added to 0.400L of an aqueous ethanol solution, giving a final concentration of 0.0400 M. What is the initial concentration of ethanol? I just need help setting it up pls Thanks!

    asked by Winston Churchill on May 13, 2012
  41. chemistry

    9.0 g of KCl was dissolved in 300 mL of water in a calorimeter. Calculate the heat of solution in kJ/mol if the temperature dropped by 2.53 K on dissolution. The specific heat of water is 4.184 J/g K

    asked by Aundrea on December 4, 2014
  42. 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 by jen on November 8, 2016
  43. Chemistry

    You make a solution using a solute (5g) in water (total volume 100ml). The molar mass of the solute is 110 g/mol. What is the molarity? What is the concentration reported as % by mass?

    asked by Judy on September 23, 2015
  44. chemistry

    an aqueous solution containing 17.5g of an unknown molecular(nonelectrolyte) compound in 100.0g of water has a freezing point of 1.8 degress C. calculate the molar mass of the unknown compound

    asked by Monique on November 5, 2011
  45. Science

    In 400min,2.4grams of copper is obtained by Cu2+ solution,find how many Amphere is required for this experiment. Using the same current and time what mass of Cu2+ will be obtained from a Cu(NO3)2.

    asked by Manal on February 1, 2018
  46. Chemistry

    A strip of zinc medal weighing 2.00 grams is placed in an aqueous solution containing 150.ml of .750M Tin(II) nitrate. Determine the grams of tin metal that will be precipitated.

    asked by Jefferson on January 13, 2015
  47. chemistry

    The solubility of NaCl at 17 celsisus degrees is 39 g per 100 ml water. If 83 g of NaCl is dissolved in 250ml of water at the same temperature, the resulting solution is: a)unsaturated; b)saturated; c)supersaturated

    asked by Ngoc Nguyen on December 13, 2014
  48. chemistry

    If 5.05mL of 0.1000 M NaOH solution is needed to just neutralize excess acid after 20.00 mL of HCl was added to 1.00 g of an antacid, how many moles of acid can the antacid counteract per gram?

    asked by Ellen on July 27, 2010
  49. chemistry

    Given a saturated solution of 25 drops of Ca(OH)2 in water that requires 34 drops of 0.0050 M HCl to titrate to the endpoint, calculate [OH-] and [Ca2+]. An ICE table will help you relate [OH-] to [Ca2+].

    asked by Cassie on April 16, 2012
  50. Chemistry

    Problem: In a first order decomposition reaction, 50% of a compound decomposes in 10.5 minutes. What is the rate constant of the reaction? The solution my professor gave says: k = .693 / 10.5min Where did the .693 come from? Thanks

    asked by Help on March 15, 2010
  51. chem

    if the freezing point of the solution is recorded 0.2 degrees C lower than the actual freezing point, will the molar mass determination for the unknown solid be too high or too low?

    asked by Brianna Swart on February 9, 2017
  52. Chemistry

    When 24.0g og glucose(a nonelectrolyte) are dissolved in 500g of water, the solution has a freezing point of -0.47C. What is the molar mass of glucose according to yhe data?Kf of water is 1.86C/m.

    asked by Jude on October 10, 2010
  53. Chemistry

    How many grams of water are needed to dissolve 27.8g of NH4NO3 (80.0 g/mol) in order to prepare a 0.452 m (molal) solution? 27.8g / 80g/mol X 0.452 = 0.157 Is this correct?

    asked by Hannah on February 12, 2012
  54. chemistry

    For the titration of 50.00 mL of 0.1000 M ammonia with 0.1000 M HCl, calculate the pH (a) before the addition of any HCl solution, (b) after 20.00 mL of the acid has been added, (c) after half of the NH3 has been neutralized, and (d) at the equivalence

    asked by chamy on April 11, 2012
  55. chemistry

    6.0 g potassium chromate is dissolved in 20 g water at 80 degree celcius. The solution is then cooled to 0 degree celcius. What mass of solute crystallises, assuming a supersaturated is not formed?

    asked by viola on May 19, 2016
  56. Chemistry

    Consider 15 mL of an aqueous solution containing 2.0 g of an organic solute. If the distribution coefficient for the solute between ether and water is 20, calculate the percent of the compound that can be recovered with a single extraction with 13.9 mL of

    asked by Anonymous on November 22, 2011
  57. chemistry

    Balancing Redox Reaction in Basic Solution CN- + MnO-4 --> CNO- + MnO2 H2O + CN- --> CNO- + 2H +2e 3e + 4H + MnO4- --> MnO2 + 2H2O My confusion is with adding the OH- please explain

    asked by Monique on November 22, 2011
  58. chemistry

    what volume of butyric acid would be needed to make 25.0mL of a 1.0M solution? oh i forgot to mention that butyric acid is a liquid with a density of 1.75gr/mL can you please explain the steps more? thanks

    asked by anonymous on February 15, 2012
  59. chemistry

    200. g of a nonelectrolyte is dissolved in 1.00 kg of water. the boiling point of the solution is then measured to be 101.5 degrees C. What is the molar mass of the compound? The Kb for water is 0.51 degrees Celsius/m

    asked by Christina on June 7, 2010
  60. chemistry

    can someone please explain to me how the solution to 240 000 would be written as 240 000 is expressed as 2.4* 105 in scientific notation? i get the decimal part but am lost after that. mary Hornbeck

    asked by mary- please check for accuracy. on February 20, 2011
  61. chemistry

    200. g of a nonelectrolyte is dissolved in 1.00 kg of water. the boiling point of the solution is then measured to be 101.5 degrees C. What is the molar mass of the compound? The Kb for water is 0.51 degrees Celsius/m

    asked by Christina on June 7, 2010
  62. Chem

    What is the molarity (M) of an HCl solution, 150 ml of which when treated with excess magnesium liberates 3.5 l of H2 gas measured at STP? I know molarity is Moles, volume, but how does magnesium come into play?

    asked by Johnie HELPPPPP on April 17, 2013
  63. chemistry

    what volume of butyric acid would be needed to make 25.0mL of a 1.0M solution? oh i forgot to mention that butyric acid is a liquid with a density of 1.75gr/mL can you please explain the steps more? thanks

    asked by anonymous on February 15, 2012
  64. CHEMISTRY

    a) Write the formula for each component in a buffer solution of acetic acid and its’ salt. b) The Ka, for hypochlorous acid, HClO, is 7.2 x l0^–4 at 25°C. What is pKa? Write the equation for the reaction to which Ka applies.

    asked by jess on October 26, 2015
  65. Chemistry

    1. Calculate the concentration of H3O+, HC2O4-1, and oxalate ion (C2O42-) in a 0.175 M solution of oxalic acid (C2H2O4). [For oxalic acid, Ka1 = 6.5 ´ 10-2, Ka2 = 6.1 ´ 10-5.]

    asked by Anonymous on December 11, 2014
  66. Chemistry

    If the hydrogen volume reads 8.35 mL, what number of moles does the represent at STP (1 atm and 0oC)? How many moles of electrons were added to the solution to create 8.35 mL of hydrogen gas?

    asked by Anonymous on April 22, 2013
  67. chemistry

    Consider 15 mL of an aqueous solution containing 2.0 g of an organic solute. If the distribution coefficient for the solute between ether and water is 20, calculate the percent of the compound that can be recovered with a single extraction with 13.9 mL of

    asked by samm on November 24, 2013
  68. chemistry

    The new vapor pressure of a solution of 3.25g of an unknown compound in 22.35g of H2O is 114.9mmHg at 55 degrees Celcius. What is the molar mass of the unknown compound?

    asked by regina on December 4, 2010
  69. Chemistry

    If 30ml of the standard sodium edetate soln neutralized 25ml of solution containing 0.25g of dried magnesium sulphate. Calculate the %w/v of mgso4 in the dried mgso4

    asked by Kingsley Ekpe on July 19, 2016
  70. chemistry

    calculate the pH of the solution when 100mL of .05M KF is mixed with 200mL of .05M HF; Ka (HF) = 3.467x10^-4. I tried to use the Henderson Hasselbach equation to get the correct answer (pH=3.16) but can't seem to get it correct. Any help would be AMAZING!

    asked by Jamie on April 3, 2014
  71. chemistry

    Calculate the molarity (mol/L) of Ba2+ when BaCrO4 is placed in a 0.0457 M K2CrO4 solution. The equation represents the solubility process. K(sp)=1.2x10^-10 BaCrO4 (s) Ba2+ (aq) + CrO42- (aq)

    asked by bme1 on April 14, 2010
  72. chem

    What is the density of an aqueous solution of potassium nitrate, that has a normal boiling point of 103.0 degrees Celsius, and an osmotic pressure of 122 at 25 degrees Celsius?

    asked by hadi on December 14, 2015
  73. Calculus

    For Questions 1–3, use the differential equation given by dx equals xy/3, y > 0. Complete the table of values x −1 −1 −1 0 0 0 1 1 1 y 1 2 3 1 2 3 1 2 3 dy/dx ? ? ? ? ? ? ? ? ? Find the particular solution y = f(x) to the given differential

    asked by Justin on July 30, 2019
  74. chem urgent!!

    What is the pH of the solution created by combining 12.00 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? i need to find the ph with HCL and then with hc2h3o2. i got 1.30 as my anser but this was wrong

    asked by tom on August 20, 2008
  75. chemistry

    What is the pH of an aqueous solution of 0.10 M NaHC(3)H(2)O(4)? Answer: 10.9 What I did: NaHC(3)H(2)O(4) + H(2)O-->

    asked by pH levels on July 30, 2011
  76. linear algebra

    It is not possible to meet exactly the recommendation by applying some combination of the three(3) brands of fertilizer because having put d question in a Matrix form. The determinant to know whether it is possible or not is equal to Zero(0) which is

    asked by John E. Livinus on August 21, 2015
  77. Analytical Chemistry

    why is it necessary to store AgNO3 solution in an amber bottle? Why must volhard titration be carried out in strongly acidic medium? Why is titration of AgNO3 with KSCN be done with vigorous swirling?

    asked by anonymous on July 25, 2008
  78. CHEMISTRY

    Determine the molar solubility (S) of Ag2CO3 in a buffered solution with a pH of 3.378 using the systematic treatment of equilibrium. Ksp(Ag2CO3) = 8.46 × 10–12; Ka1(H2CO3) = 4.45 × 10–7; Ka2(H2CO3) = 4.69 × 10–11.

    asked by Anonymous on June 3, 2015
  79. math

    Fupi used 0.2 of his salary,sh 32,800 per month for school fees,quarter of the remained amount,he deposited at the bank and the rest amount used for other expenses.How much were used for other expenses?please anyone one to help me with the solution

    asked by kelvin on September 14, 2016
  80. Chemistry

    A solution of the weak acid HA was titrated with 0.100 M NaOH. the pH measured when vb=ve was 4.62 mL was 4.62 mL. Calculate the Ka of weak acid. (vb= added base volume, ve= equivalence point reading)

    asked by Chanu on August 1, 2018
  81. Physiology

    How many is moles are in 0.5L of a 3.0M solution of sodium chloride? Sodium chloride dissociates into 2 osmoles per mole. I'm having trouble setting this up. My teacher couldn't explain it clear enough and neither does the book.

    asked by Karen on September 8, 2015
  82. CHEMISTRY!!!!

    Write two reactions for NaHCO3, reacting with water in one NaHCO3 is acting as acid the other as a base. Is 0.10M solution going to be acidic or basic? Explain. I write the two rxns but what do I do with then...

    asked by L.Bianchessi on March 5, 2012
  83. Math

    The two legs of a right triangle are in the ratio √3/2. If the hypotenuse is 10 units long, find the area (in square units) of the triangle. Please provide COMPLETE solution and FINAL ANSWER.

    asked by K on March 3, 2018
  84. physics

    i need a proof/solution to this question. please help. if a ball is trown vertically upward at 80 ft/sec it will continue to rise for approximately how many seconds? how many seconds will the ball return to the ground? thanks!

    asked by Anonymous on September 12, 2013
  85. Science

    Perhaps you mean Hadean, when the planets of the solar system were just forming out of dust and particles. There were no solid rocks or anything yet, so you could hardly call it geologic. The thing about gravity is that if two specks of dust are drifting

    asked by Music Note on October 27, 2015
  86. chemistry please help

    the enthalpy change when a strong acid is neutralized by base is -56.1 kJ/mol. If 135 ml of .450 M HI at 23.15 C is mixed with 145 of .500 M NaOH at 23.15 C What will the max temperature reached by the resulting solution? tamana: Assume the specific heat

    asked by Jazmin on October 17, 2010
  87. Math

    Write a set of parametric equations in Quadrants I and IV for a semi-circle with a radius of 10. I'm kind of new at parametrics, so this is what was given to me: (x-h)^2 + (y-k)^2 = r^2 x^2 + y^2 = r^2 r = 10, y = rsint, x=rcost So, 10cost + 10sint = 100

    asked by Momo on April 22, 2009
  88. accounting info. systems

    The last step in the revenue cycle is cash collections. The accounts receivable department must know when customers pay their invoices, yet segregation of duty controls dictate that the collection and recording functions be kept separate from each other.

    asked by Joe on May 23, 2010
  89. Chemistry

    Which aqueous solution below is expected to have the lowest freezing point? Assume 100% dissociation for ionic species. 1)0.25m MgBr2 2)0.30m Na2SO4 3) 0.50m KCl 4) 1.0m sucrose 5) 0.40m Cr(NO3)3 I think that the answer is 0.30NaSO4 but I am not positive.

    asked by Hannah on February 10, 2012
  90. educational technology

    1. Define audio visual/instructional media. 2. Cite an examples of audio visual/instructional materials. 3. When and how audio visual/instructional media are used? 4. What are its system approach in teaching?

    asked by klar maesen on October 17, 2007
  91. physics

    A space vehicle is coasting at a constant velocity of 20.5 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.390 m/s2 in the +x direction. After

    asked by dan on January 21, 2011
  92. Physics

    A wooden block with mass 0.26{\rm kg} rests on a horizontal table, connected to a string that hangs vertically over a friction-less pulley on the table's edge. From the other end of the string hangs a 0.20{\rm kg} mass. What minimum coefficient of static

    asked by Nichole on October 18, 2012
  93. Physics

    A wooden block with mass 0.26 kg rests on a horizontal table, connected to a string that hangs vertically over a friction-less pulley on the table's edge. From the other end of the string hangs a 0.12 kg mass. A) What minimum coefficient of static friction

    asked by Linday on February 14, 2017
  94. Chemistry

    The equilibrium constant is equal to 5.00 at 1300K for the reaction 2SO2(g) + O2(g) 2SO3(g) if initial concentrations are [SO2] = 6.00M, [O2] = 0.45M, [SO3]= 9.00M, the system is a/. At equilibrium b/. Not at equilibrium and will remain in an un

    asked by Fiona on April 5, 2017
  95. Physics

    A ball of mass m is attached to a spring with a spring constant k. The system is attached to a thin vertical axis as shown in Figure 4. In its equilibrium vertical position the spring length is L. The axis starts to rotate with a constant angular frequency

    asked by James on December 9, 2014
  96. physics

    The diameters of Earth and the Sun are approximately 1.3 107 m and 1.4 109 m respectively, and the average Sun-Earth distance is 1.5 1011 m. Consider a scale model of the solar system, where Earth is represented by a peppercorn 2.3 mm in diameter.

    asked by kj on January 28, 2009
  97. Algebra

    An engineer designs a satellite dish with a parabolic cross section. The dish is 10 ft wide at the​ opening, and the focus is placed 8 ft from the vertex. ​a) Position a coordinate system with the origin at the vertex and the​ x-axis on the​

    asked by Lacey on November 16, 2016
  98. Algebra

    An engineer designs a satellite dish with a parabolic cross section. The dish is 14 ft wide at the​ opening, and the focus is placed 4 ft from the vertex. ​a) Position a coordinate system with the origin at the vertex and the​ x-axis on the​

    asked by Jason on November 16, 2016
  99. AP Chemistry

    Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations

    asked by Frank on April 22, 2010
  100. Physics

    Attempting to stop on a slippery road, a car moving at 90 km/h skids across the road at a 30 angle to its initial motion, coming to a stop in 3.8s. Determine the average acceleration in m/s^2, using a coordinate system with the x-axis in the direction of

    asked by James Baker on March 27, 2013

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