1. analytical chemistry

    150 mL of a solution contiains .00015 M NaI, .0055 M NaC, and .12 M Na3PO4. A solution of .10 M AgNo3 is slowly added. Who precipitates 1st, 2nd, and 3rd? When the last one to precipitate just begins to precipitate, what % of the other 2 anions are still

    asked by TK on October 27, 2015
  2. chemistry

    a solution is prepared by mixing 1.0 grams of benzen(c6h6) in 100g of water to create a solution total volume of 100ml.calculate the molarity,mass percent,mole fraction and molarity of benzene in the solution

    asked by john on August 26, 2014
  3. Organic Chemistry

    Hello, I just have a quick question that I would like to have clarified. According to my textbook definition, NaBH4 (a reducing agent) can be used in solution in alcohols or even solution in water - provided the solution is alkaline." However, my textbook,

    asked by Toki on December 6, 2010
  4. chemistry

    150 mL of a solution contiains .00015 M NaI, .0055 M NaC, and .12 M Na3PO4. A solution of .10 M AgNo3 is slowly added. Who precipitates 1st, 2nd, and 3rd? When the last one to precipitate just begins to precipitate, what % of the other 2 anions are still

    asked by lisa on October 27, 2015
  5. Chemistry

    Sodium hypochlorite, NaClO, is added as a disinfectant to the water supply. You are analyzing a sample from the supplier to verify its purity and you prepare to titrate 250.0 mL of a solution containing 1.86 g of NaClO with a 1.00 M HCl solution. What is

    asked by Rosa on February 13, 2012
  6. College Algebra

    Problem: Use Common or Natural Logarithims to solve the exponential equations symboliclly. 2e^7x+4=4 (Round to four decimal places) I tried solving this way 2e/2^7x+4=4/2 e^7x+4=2 ln e^7x+4=ln 2 7x+4=ln 2 7x+4-4=ln 2-4 7x=ln 2-4 7x/7=ln 2-4/7 x=ln 2-4/7

    asked by Lee on November 14, 2010
  7. algebra

    What is the value of the expression 2x to the 2nd power + 3xy -4y to the 2nd power when x = 2 and y = -4? please show how to solve this

    asked by T on May 21, 2011
  8. algebra

    So here's the problem: 6a^-2 + 9a^2 all over 3a^-2 The answer is suppose to be 2 + 3a^4 I keep getting the answer as 5. Can you show me how to solve this problem correctly?

    asked by Katherine on February 7, 2009
  9. Chem

    Am I doing this right? Find the concentration of the phosphate ion. 1.00 mL 210 micro molar. DI water added to 25 ml line. 1.00 mL phosphate solution * 1L/1000mL * 210 mol phosphate solution/1L solution * 1.0 *10^-6 mol/ 1 micromol * 1 mol PO4 3- / 1 mol

    asked by Allie on March 8, 2018
  10. Chemistry

    Compare the g/L solubility of CaCO3 in pure water, a H3O+ (aq) solution with a PH of 3.00 and a H30+(aq) solution with a pH of 1.00. Ksp for CaCO3 is 3.36 x 10^-9 CaCO3 (s) + H3O (aq) = Ca (aq) + HCO3 (aq) + H2O (l) (equilibrium equation) Keq= 71 I knew

    asked by Andrew on March 11, 2013
  11. Chemistry

    i need to find the; [Cl-] in PbCl2 solution,[Pb2+] in PbCl2 solution, and the ksp given: PbCl2(s)--> Pb2+(aq)+2Cl-(aq) Temp of solution =20.2 volume of Pbcl2 solution=25.00ml mass of dry AgCl2(g)=0.2543g #moles : AgCl(s)=1.77e-3 Cl(aq)=1.77e-3 Pb2+(aq)=

    asked by Anthony on April 26, 2010
  12. Chemistry

    A system contains liquid water. The water freezes. What is the sign of q for the system for this phase change?

    asked by Erika on March 11, 2011
  13. Computer

    Need an example of open loop control system and a closed loop system.. Not really understanding the concept of it..

    asked by ric on June 13, 2010
  14. science

    What are the major physical differences between the respiratory system of a human and the respiratory system of a frog?

    asked by Ava on January 22, 2018
  15. Biology

    What is the significance of the order of development of the nervous system before the cardiovascular system during feotal development?

    asked by Jen on September 30, 2007
  16. physics

    What happens when the frequency of a force applied to a system matches the natural frequency of vibration of the system

    asked by kabelo on September 20, 2010
  17. Physical Chemistry

    If the n = 3 to n = 4 transition for a certain particle-in-a-box system occurs at 4.00 x 10^13 s -1 , find the frequency of the n =6 to n =9 transition in this system.

    asked by Lorin on December 1, 2015
  18. Math

    ewrite each equation below. Then solve your new equation. Be sure to check your solution using the original equation. 4/x=x+3

    asked by April on January 11, 2016
  19. Math

    Rewrite each equation below. Then solve your new equation. Be sure to check your solution using the original equation. (n+4)+n(n+2)+n=0

    asked by Anonymous on January 11, 2016
  20. algebra

    Write the equation of the line, in standard form, that passes through the origin and is parallel to x + y = 6. Include your work in your final answer. Type your answer in the box provided or use the upload option to submit your solution.

    asked by Jamie on February 6, 2015
  21. Algebra I

    Please show me how to solve: The value of a $20,000 car decreases every year, t. The equation below models this situation: 20000(1-0.04t)=13,000. After how many years will the car be worth $13,000. Round to the nearest tenth if necessary.

    asked by Jane on April 11, 2012
  22. algebra

    In a canoe race, a team paddles downstream 480 m. in 60 s. The same team travels up stream in 80 s. Find the team's rate in still water and the rate of the current. Please show how the equation is set up to solve

    asked by chris on May 26, 2012
  23. math

    Company ABC offers a series discount of 20%,10% and 4% on a type of water filter while company XYZ offers a single discount of 32% on the same type of water filter. Which company offers a greater discount on its merchandise assuming the list price is the

    asked by fizz on April 26, 2014
  24. Chemistry

    How would you usually prepare starch indicator solution for iodine titrations? Can the solution be stored for a few months in the fridge? I noticed that sometimes the starch indicator solution in the fridge has turned cloudy, in which case we should

    asked by annie on September 25, 2010
  25. Chemistry

    1)What is the pH of a 0.25 M solution of acetate (CH3COO-) with a pKa of 4.76? 2)If the [OH] of a solution is 2.95 x 10-5M, what is the pH of the solution? 3)Determine the pH at the equivalence point when 25.00 mL of 0.1056 M CH3COOH is titrated with

    asked by ChemEmergency on March 18, 2017
  26. Chemistry

    A solution is prepared by dissolving 5.00g of an unknown molecular solid in water to make 500 ml of solution. The osmotic pressure of the solution is 1.61 atm at 25 degrees C. What is the molar mass of the solute? This is what ive done so far: M=

    asked by James on September 7, 2010
  27. Physics

    Starting from rest, a 5kg block slides 2.5 m down a rough 30o incline in 2 seconds. Find a) the work done by the force of gravity. b) the work done by friction. c) the work done by the normal force Do part b last

    asked by Anonymous on October 19, 2016
  28. Math ; please please help.

    1. Explain in detail how to determine the value of the independent variable in a quadratic relation if the value of the dependent variable is known. Please check my answer - You would substitute the value for the dependent variable, then you would solve

    asked by Amanda on April 9, 2008
  29. physics

    A ramp causes a ball to accelerate at - 4 m/s the ball is rolled up the ramp at 13 m/s find the ball velocity after rolling for 6 seconds you must show your work

    asked by lisa on May 3, 2012
  30. Physic

    The position of a mass on a spring is given by x = (7.6 cm) cos [2 π t / (0.82s)]. Where is the mass at t = 3.1 s? (Answer: 1.45cm) Answer is provided above. Please show all work on how to get the answer. Thank you.

    asked by Anonymous on May 23, 2014
  31. Math

    My younger sister needs help with this problem: You have an 8 inch stack of dimes, each dimes is a half inch, how many dimes are there? I know the answer is 17, but I need to help her show her work

    asked by Palmer on November 30, 2016
  32. calculus

    use the given zeros to find the remaining zeros of the function h(x)=x^4-9x^3+12x^2+138x-1360 zero:3-5i enter the remaining zeros of f please show work

    asked by Heather on December 1, 2012
  33. Math

    Marla buys a bag of peanuts that weighs 3/4 of a pound later that week the bag is 2/3 how much does the bag of peanuts weigh now Show your work

    asked by Multiplying fractions on September 24, 2018
  34. Algebra

    The perimeter of a pool table is 40ft. The table is three times as long as it is wide. What is the length of the pool table? Show work

    asked by Leen on August 28, 2016
  35. 6th grade Math

    Rafael asked 85 students what kind of pet they liked the most. Exactly 35% of the students said they liked dogs best. What was the total number of students who said they liked dogs best? Please show work!!

    asked by Genesis on November 25, 2014
  36. 3rd grade math

    Robert is writting a poem. The poem is divided into 5 stanzas and is on 2 pages. There are 60 lines in the poem. How many lines are in each stanza? show work please

    asked by Carlos on March 29, 2011
  37. statistics

    a math test has a mean of 43 and a standard deviation of 17.0. find the corrresponding z scores for a test score of 13 and a test score of 59. show work

    asked by Anonymous on October 11, 2010
  38. Math

    A scale drawing of a house is drawn with a scale of 1 in. : 16 ft. Find the actual length of a hallway that is 5/8 in. On the scale drawing. Show your work

    asked by Dennis on January 3, 2013
  39. Please help

    A rectangular picture frame has a perimeter of 58 inches. The height of the frame is 18 inches. What is the width of the frame? Please help show work and help answer thanks

    asked by Will on September 25, 2015
  40. math

    Simplify each radical expression. Leave in radical form. Show your work. 6.sqrt 75 + sqrt 3 7. sqrt7(sqrt 14 + sqrt3 ) please.

    asked by Alex on November 28, 2017
  41. physics

    Determine the acceleration and normal force of system below. Assume no friction, the mass equal to 10.0 kg and the angle equal to 60.0 degrees. Assume gravity equals 9.8 m/s/s. The picture looks like a right triangle with a box sliding down it. I am a 9th

    asked by Anonymous on December 1, 2010
  42. Chemistry

    How many grams (of mass m) of glucose are in 355mL of a 5.50% (m/v) glucose solution? You have a solution that is 18.5% (v/v) methyl alcohol. If the bottle contains 2.49L of solution, what is the volume (V) in milliliters of methyl alcohol? A 6.00 % (m/v)

    asked by Jennie on March 3, 2015
  43. MATH

    i really need help on this question!! I need to solve it using a system of two equations, the question says that an automobile radiator contains 16L of antifreeze and water. this mixture is 30%antifreeze. how much of this mixture should be drained and

    asked by Laura on January 6, 2008
  44. math

    Jenna has $1500 in a savings account. She adds $30 to her account each month. Luis has $2400 in his savings account. He withdraws $30 from his account each month. Write and solve a system of equation.

    asked by sahar on November 8, 2012
  45. English

    I have some more sentences to check on the same subject.Thank you very much! 1) I took off a day because I was ill. Correction: I took a day off... Or I went sick (I took a day sick leave/I asked for a day sick leave??) 2) I would like to work at my

    asked by Matthew on April 12, 2012
  46. International Business: Please Check Answer

    Hi, Please help me! I need to know is these is the correct answer for these questions. Thanks for your help! Some countries try to hold the value of their currency within some range against an important reference currency. This is referred to as what? a. A

    asked by Brandy on November 18, 2014
  47. 5th grade math (word problems)

    Can you explain how to do the following problems? 1. Order these fractions from Greatest to least. 3/12, 5/8, 1/4, 7/8, 4/16 work: find least common denominator 3/12 = 12/48, 5/8 = 30/48, 1/4 = 12/48, 7/8 = 42/48 answer = 7/8, 5/8, since 3/12 and 1/4 are

    asked by Alex on May 6, 2013
  48. math

    2x+4(1-x)=11+5x 2x+4-4x=11+5x 6x+4=11+5x 6x=7+5x x=7 i think this is it x = 7 is not correct. Here's how the problem should work out: Use the distributive property to get rid of the parentheses and you will end up with this: 2x + 4 - 4x = 11 + 5x Combining

    asked by Sigrid on April 30, 2007
  49. English

    1. My father goes to work by car. 2. My father goes to work by his car. 3. My father goes to work in his car. (Which one is grammatical?) English - Jen, Tuesday, May 18, 2010 at 11:11pm I would say "my father drives his car to work". 1 is probably the most

    asked by rfvv on May 19, 2010
  50. chemistry

    22.0 ammonium chloride decomposes to form hydrochloric acid, and ammonia. at the conclusion of the reaction, the scientist collects 10.24L of ammounia measured at 52 degrees Celsuis and 105.3 kPa. What was the percent yield of the reaction? Write the

    asked by betty on February 20, 2007
  51. College Algebra

    Cleaning sidewalks. Edgar can blow the leaves off the sidewalks around the capitol building in 2 hours using a gasoline-powered blower. Ellen can do the same job in 8 hours using a broom. How long would it take them working together? If someone can show me

    asked by Misty on August 11, 2010
  52. Math

    Suppose that the function represents the percentage of inbound e-mail in the U.S. that is considered spam, where x is the number of years after 2002. Use this model to approximate the percentage of spam in the year 2006 to the nearest tenth of a percent.

    asked by Anna on December 10, 2008
  53. project management

    You find a problem in a project. The project has a defined baseline and task progress has been entered for all tasks for the first report period. The ACWP field show the right cost for the work reported, but the BCWP and BCWS fields are zero. what could be

    asked by Matthew on November 16, 2008
  54. physics

    Only two forces act on an object (mass = 4.00 kg), as in the drawing. Find the magnitude and direction (relative to the x axis) of the acceleration of the object. Ftotal=Sqrt(60^2+40^2)=72.11(N) Angle=tan-1(60/40)= 56.3° (How did you get 56.3°) a=

    asked by Anonymous on October 25, 2012
  55. Algebra

    The volume in cubic feet of a box can be expressed as (x)=x^3-6x^2=8x , or as the product of three linear factors with integer coefficients. The width of the box is x-2.

Factor the polynomial to find linear expressions for the height and the

    asked by Ciaria on March 17, 2015
  56. physics

    Show your work for how the formula was used to calculate a final answer! GPE for second hill: ___ _________________++ Describe how conservation of energy applies to a roller coaster ride from start to finish. This is the last part of roller coaster I'd

    asked by kevin on March 25, 2012
  57. Science(pre-med)

    In pre-med we are making powerpoints about the anatomy and physiology of the cardiovasculary syemstem and the respiratory system!! So far I finished the cardiovasculary syestem and i am wondering is the Anatomy of a organ the structures that it is composed

    asked by Louisea on November 14, 2010
  58. algebra 1

    What point is a solution to the system of inequalities y(inequality arrow pointing right)4x and y(inequality arrow pointing right)-2x-3? -1/2,-2?

    asked by Lily on July 24, 2010
  59. math

    Sally is buying 6 identical shirts. The original price for one shirt is 39.99. The store is having a "buy one get one half off" sale and Sally has a coupon for an additional 25% off. The sales tax rate is 4 3/8. What is the total cost for the items Sally

    asked by Kat on February 10, 2015
  60. Math

    Sally is buying 6 identical shirts. The original price for one shirt is 39.99. The store is having a "buy one get one half off" sale and Sally has a coupon for an additional 25% off. The sales tax rate is 4 3/8. What is the total cost for the items Sally

    asked by Linda on February 11, 2015
  61. Physics - pulley

    A construction crew pulls up an 87.5-kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.5 m and it arrives with a speed of 15.6 m/s having started from rest. Assume that acceleration was not constant. I have

    asked by Casey on June 3, 2011
  62. CIS

    Create three arrays of type double. Do a compile-time initialization and place different values in two of the arrays. Write a program to store the product of the two arrays in the third array. Write a method to display the contents of all three arrays

    asked by Pavan on November 21, 2014
  63. ALGEBRA

    Answer the questions below. Use Equation Editor when writing or solving mathematical expressions or equations. First, save this file to your hard drive by selecting SAVE AS from the File menu. Click the white space below each question to maintain proper

    asked by SAMANTHA on March 9, 2010
  64. Chemistry

    1) If I add 10 grams of salt into 0.1 L of water, what is the molarity of the solution? 2) Serial dilution is a common technique to make low concentration solutions. Each Serial Dilution involves taking half the solution and mixing it with a solvent, to

    asked by Caitlyn on February 18, 2016
  65. chemistry

    What mass of CaCl2(s) must be dissolved in pure water at 10 degrees celsius to make a 26.3 mL solution and to increase the solution temperature to 16.4 degrees celcius? assume solution has same physical properties as water. deltaH of solution = -82.8

    asked by Anonymous on November 17, 2008
  66. chemistry

    2.) If you pass 10.0mL of a 50.0mL solution of [Co(en)2Cl2]Cl that has been reduced with Zn through a cation exchange column, you will obtain a solution that has three H+ ions for every Co3+ ion that was originally present in the sample. These H+ ions are

    asked by xx on October 26, 2014
  67. physics

    A damped mass-spring system oscillates at 190 Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 6.5 cm and the energy of the oscillating system is then 65 J. (a) What is the amplitude of oscillation at t = 2.0 s? What

    asked by Sierra on January 31, 2011
  68. math

    lim (7-6x^5)/(x+3).... the lim is x->+infinity [ans=-infinity but i get 0] can someone show me the calculation work.

    asked by ella on July 20, 2011
  69. Physics

    Which has more potential energy: a 1.0 kg ball at a height of 10 m, or a 10 kg ball at a height of 1.0 m? Show all work.

    asked by Anon on December 21, 2017
  70. Math

    Sarah had got 40 out of 50 questions right. What is the percentage of questions Sarah got right? Explain and show your work.

    asked by Allen on March 30, 2017
  71. statistics

    . In terms of the mean and standard deviation: - What does it mean to say that a particular value of x has a standard score of +1.5? - What does it mean to say that a particular value of x has a z-score of -2.6? Please show all work.

    asked by Anonymous on September 29, 2012
  72. mat115

    Please help with this math problem. The directions are Add. Must show work. 4 2/7 + 1 5/7 I appreciate your help with this math problem. Thanks so much.

    asked by adore001 on August 29, 2010
  73. math

    There are 17 goats in the barn. 8 goats go outside. How many are still in the barn? Use ten frames show work

    asked by Giselle on December 2, 2014
  74. math

    use 3/8 of a thin of paint, what fraction of the paint is left in the thin (show work)

    asked by sherm on February 15, 2014
  75. math

    show work 2 times a number increased by 28 is less than or equal to 6 times a number?

    asked by shanae on November 6, 2007
  76. algebra

    Which statistical method best represents this set of data: 1, 2, 5, 2, 3, 7, 300, 5, 3, 3? Which statistical method best represents this set of data: 1, 2, 5, 2, 3, 7, 300, 5, 3, 3? a) mean b)median c)mode d)standard deviation

    asked by Meredith Grey on March 25, 2015
  77. Statistics

    A basketball team has to play 3 games in an elimination roumd. What is the probability of them winning? A. 0 games B. 1 game C. 2 games D. 3 games

    asked by V on November 14, 2016
  78. organic chemistry

    i have a 'ethanol benzene' and i have to add H3O+ (elimination). what will my product be? will the H3O attack the OH on the chain or will it attack the ring?

    asked by Anonymous on March 1, 2014
  79. Math

    While traveling for vacation, you have decided to divide your lodging between a resort and a regular stay hotel. Let x represent the number of nights you will spend in a resort and let y represent the number of nights you will spend in a regular stay

    asked by Anonymous on December 7, 2015
  80. Algebra

    I got a couple I want to check my work : Both are Solve using the quadratic formula : 1) x^2-3x=7x-2 x^2-3x-7x+2=7x-7x-2+2 x^2-10x+2=0 x = 10 +- sqrt10^2 - 4(1)(2) / 2(1) x = 10 +- sqrt100 - 8 / 2 x = 10 +- sqrt92 / 2 x = 10 +- 2sqrt23 /2 x = 5 +- sqrt23 x

    asked by John on November 13, 2007
  81. math-5

    Which choice is the answer? Show me please. Tara spent 3 hours doing homework. She spent 1/3 of her time on math, and 1/5 on science. Which method would provide the most reasonable estimate of the totaltime Tara spent on her math and science homework? a.

    asked by Anonymous on November 18, 2012
  82. Physical Science Question 1

    If no friction acts on a diver during a dive, then which of the following statements is true? A.The total mechanical energy of the system increases. B.Potential energy can be converted into kinetic energy but not vice versa C.(KE+ PE)beginning = (KE +

    asked by Liz on June 12, 2006
  83. algebra

    The total charge for a taxi ride includes an initial fee of $2.75 plus $2.25 for every 1/2 mile traveled. Joe took a taxi, and the ride cost him $56.75. How many miles did he travel in the taxi? What is the equation? Show your work.

    asked by syram on March 19, 2013
  84. algebra

    Simplify. 3 - 2(4 - 7) ÷ 9 i don't know what ta dooooo after i subtract 4 and 7 which is -3 then multiply 2 which is -6 then i don't know what to do afterwards, i know pemdas so -6 divided by 9 cannot be so please help on that. the integers from -3 to +3

    asked by anon on August 27, 2015
  85. physics

    A car rolling at 18m/s when the driver hits the breaks after 5 seconds the car has slowed down to 3m/s find the cars acceleration you most write down all given information and show all work WHat does this acceleration tell us about the motion of the car?

    asked by lisa on May 3, 2012
  86. Physics

    Two ropes are attached to a wagon, one horizontal to the west with a tension force of 30 N, and the other east and at an angle of 30° northward and a tension force of 40 N. Find the components of the net force on the cart. Show all your work.

    asked by Jay on December 10, 2011
  87. Science

    Determine the final temperature when 100 g of water absorbs 1000 J of thermal energy, given that the initial temperature of the water is 20.0°C. The theoretical specific heat capacity of water is 4.19 J/g·°C. Show your work below.

    asked by Desirae on May 22, 2015
  88. Physics

    A cheetah running at 30 m/s is pursuing a zebra going in a straight line at 14 m/s. If the zebra has a 35 m head start, how much time does it take for the zebra to catch up? (Please show all work. I know the answer, but I need the step by step instruction

    asked by Daniel on January 30, 2012
  89. Math - Trig

    For the equation 4 cos theta - square root 12 = 0, where 0 < theta < (or equal to) 2 pi, determine the measure of theta. The answers to choose from are: A) pi/ 3, 5 pi/ 3 B) 2 pi/ 3, 4 pi/ 3 C) 5 pi/ 6, 7 pi/ 6 D) pi/ 6, 11 pi/ 6 Please explain and show

    asked by Angi on December 12, 2011
  90. Math

    Every time Mr. Cold born throws a ball of paper in the garbage can, the probability the ball goes in the cans is 3/4. What is the probability he misses 2 times in a row? Please show all work. Please help I don't understand probability

    asked by Cherie on April 9, 2013
  91. Physics

    Would someone please show me a way to work this out A ball is dropped from the top of a building 150 m high. (Ignore air resistance) A. How long does it take the ball to hit the ground? B. What is the speed of the ball when it hits the ground?

    asked by missy on September 13, 2011
  92. math (final trig problem)

    Solve for x on the interval [0,π/2): cos^3(2x) + 3cos^2(2x) + 3cos(2x) = 4 I havent done trig for a while so what exactly does that mean in solving for x on that interval and how would i go about doing that? Where are you getting these tough trig

    asked by jacob on April 30, 2007
  93. Chemistry

    How many milimetres of 0.114 M sulphuric acid solution provide the sulfuric acid required to react with the sodium hydroxide in 32.3 ml of 0.122 M NaOH according to the following equation? H2SO4 + 2 NAOH ---> Na2SO4 + 2 H20 A millimeter is a unit of

    asked by Cadi Almond on September 11, 2006
  94. education

    prepare and submit a proposal to bill that gives your suggested solution to his business plan. provide bill with the details of what he needs to purchase in order to have what he needs to conduct his business using today's technology, make sure you include

    asked by elisha on March 2, 2014
  95. CHemistry

    im not sure how u solve these types of problems... How many moles of NaOH are contained in 200ml of a 0.1M of NaOH? How many grams of NaOH are contained in 500ml of a .5M solution of NaOH? A 0.1 M solution has 0.1 moles of the solute NaOH per liter. You

    asked by Phil on April 21, 2007
  96. Physics

    A worker pushes 25Kg crate a distance of 5m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic frication between the crate and the floor is 0.23. (a) What magnitude of force must the worker apply? (b) How

    asked by Abdul Waheed on November 2, 2011
  97. math

    15L OF 36% Alcohol solution is mixed with 30L of 45% alcohol solution.what is concentration of resultant solution??? (ans 42% how???)

    asked by mini on May 4, 2017
  98. Molality

    An aqueous solution contains 8.7% NaCl by mass. 1. Calculate the molality of the solution. 2. Calculate the mole fraction of the solution.

    asked by Kyle on January 30, 2010
  99. chemistry

    What is the molarity of an HCl solution if 14.0mL HCl solution is titrated with 22.6mL of 0.155 M NaOH solution?

    asked by Peter on February 9, 2013
  100. math- weighted averages

    Santa tasted 500 ml of a 60% solution of eggnog. How many milliliters of a 30% eggnog solution should be added to obtain a 50% solution?

    asked by Kira on December 8, 2014

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