1. physics

    2. A rifle is fired horizontally and travels 980 m. The rifle barrel is 6.1 m from the ground. What speed must the bullet have been travelling at? here i got a time of 201.24.. i then added the 980m to the 6.1m and put it in the x=vt equation to get a

    asked by Mark on November 9, 2009
  2. Math help please?

    I have a hard time understanding the process of adding fractions with unlike denominators, and I usually will go on Khan Academy to look at tutorials and walkthroughs but I can't do that during school (only when I'm doing my homework @ home). Can somebody

    asked by min yoonghy on January 25, 2018
  3. COMM/215

    I would like to know if i have used the correct grammar and punctuation in the following two sentences: 47. "Have you ever read the story, 'The Tell-Tale Heart' by Edgar Allen Poe?" Dave asked. 48. "Did the professor say, 'Put down your pencils'?" Janice

    asked by Frank on January 31, 2015
  4. physics

    A crane uses a block and tackle to life a 25 kN boulder to a height of 26 m. a. how much work is done on the stone? put your answer in scientific notation. b. if the work is done in 15s, what is the power output in watts and in horsepower?

    asked by Rose on September 3, 2012
  5. Math

    need help on this review question. Determine each sum by writing an equivalent numberical expression using Commutative and Associate properties. 3 + 9 + 7 + 6 For commutative could you just put 3 + 7+ 9 + 6? I'm confused on what do do for associative since

    asked by Brandi on March 27, 2013
  6. maths

    Sketch the region bounded by the x-axis, the curve y = x2 + x + 1 and the lines x = 2 and x = 5. Write down a definite integral that represents the area of that region Just stuck getting points for the first equation as when I put y=0 I got a complex

    asked by anon on May 3, 2018
  7. English

    HOw would you quote this correctly? These movies also suggested that blind people were led by “seeing-eye dogs” (Carver 2828) to help them get around places. Would i put the quotes at the end of the period, by the way 2828 is the page #.

    asked by Jon on December 15, 2009
  8. Chemistry -- to Dr.Bob

    i put 1 for the spaces before both of the Fes and got them both wrong but i got the others right. thank you Balance the equation: Note: If a chemical species coefficient is "1" then "1" needs to be entered in the field before that species. 1 MnO4– + 8H+

    asked by James on April 24, 2008
  9. geometry

    Harold is making a letter a to put on the rooftop of the a is for Apple Orchard store. The figure above shows a sketch of the design. what should be the measure of angle is one and 2p so bad the horizontal part of that a is truly horizontal

    asked by journey on July 4, 2016
  10. Physics

    If an object is hung from a cable with a weight of 40 N, what is the tension in the two cables? I got some answers, but it would be best if I knew if I was doing the problems correctly before I do the rest of the worksheet. I did a bunch of work, but it's

    asked by Katie on December 2, 2009
  11. English

    On a Works Cited page, If I have 2 articles, they don't give an author name but says by: Associated Press and CNN Wire Staff, do I put that in the author place or do I skip that and start with the title. Thanks in advance.

    asked by Sue on April 11, 2010
  12. rational exponents

    Express cube root 27x^4y^6 using rational exponents (27x^4y^6)1/3 (27^1/3)(x^4/3)(y^6/3) stuck. I think the final answer is 9x^3/4(y^2) I don't know where to put the parentheses to break it up so I hope yall understand what it's suppose to be.

    asked by Anonymous on August 25, 2008
  13. math

    PROBLEM SOLVING : CERTIFIED FINANCIAL PLANNER If an individual put the equivalent of $50 per month, or $600 annually into an ordinary annuity, how much money would accumulate in 20 years at 3% compounded annually? How much at 5%?

    asked by jhonatan on May 29, 2013
  14. College Ethics&Socity

    Are the accountability systems put in place within our public service agencies working best as an escape route for those elected to govern the agency or as a tool of transparency for the interest of the people who elected them?

    asked by LaTarial on June 15, 2009
  15. ethics and society

    Are the accountability systems put in place within our public service agencies working best as an escape route for those elected to govern the agency or as a tool of transparency for the interest of the people who elected them?

    asked by carrie on October 12, 2010
  16. spanish

    For the question In Fuente ovejuna how does laurencia respond to Fernan gomez pursuit of chasing her, in Act one. I put the answer was she refused his gifts is that correct, if not can you steer me to to find the right answer, thanks

    asked by clark on September 9, 2008
  17. Algebra1

    Hello, need help with this question: Find the product. (-7m2n)(-9mn3) For my answer i put 63m^3n^4 and I got it wrong, the computer online doesn't recongnize the carrot and we were told for the carrot you have to replace it and now I am lost.

    asked by Denise on February 23, 2010
  18. Biology

    Color Blindness is inherited as a sex linked recessive. If a color blind woman marries a man with normal vision, what would you expect in their children? Show a cross I put that X- x- Xx x-

    asked by Ash on February 19, 2015
  19. Equilibrium

    An aqueous solution of carbonic acid reacts to reach equilibrium as described below. H2CO3(aq) + H2O(l) HCO3^-(aq) + H3O^+(aq) The solution contains the following solute concentrations: Carbonic Acid: 3.3*10^-2 mol/L HCO3^-: 1.19*10^-4 mol/L H3O^+:

    asked by Tyler on August 3, 2015
  20. chemistry

    I have to write a balanced equation for the reaction of a solid lead being added to a solution of silver nitrate. Solid silver forms and the lead disappears as it goes into the solution as lead (ii) nitrate. I think it should be Pb + AgNO3 >>>> Ag +

    asked by jazz on April 14, 2014
  21. Improving your writing Revised

    For the past three months there seems to be an ever-growing problem at our company of DMD Medical Supplies: The quality of work has been poor; the morale of various employees has been brought down; and the workflow has been uneven amongst both teams and

    asked by Shawna on February 2, 2012
  22. chem

    can anyone help me with this question what is the advantages and disadvantages of hydrogen power as opposed to hydrogen fuel, also what is the equation for hydrogen feul? I do not understand your first question. Hydrogen power REQUIRES hydrogen fuel.

    asked by ana on March 3, 2007
  23. Chemistry

    (I need help with these two questions. I don’t know how to solve it.) 1. A student takes 215mL of a 5.0M HCI solution and places it into a beaker. The students then adds enough water to the beaker to make 750mL. Calculator molarity of this new solution.

    asked by Samantha on April 10, 2018
  24. College Gen.Chemistry

    A student wanted to determine the amount of copper in a sample of copper ore. The student dissolved a 2.500 ± 0.001 g piece of copper ore in about 75 mL of nitric acid; then, a complexing agent was added. The student transferred this solution to a

    asked by Anonymous on March 25, 2014
  25. Chemistry - Science (Dr. Bob222)

    A student wanted to determine the amount of copper in a sample of copper ore. The student dissolved a 2.500 ± 0.001 g piece of copper ore in about 75 mL of nitric acid; then, a complexing agent was added. The student transferred this solution to a

    asked by Anonymous on March 25, 2014
  26. chemistry

    1. A solution of sodium oxalate has a pH of 7.82. The [OH-] in mol/L must be which of the following: a) 6.18 b) 1.5 x 10-8 c) 6.6 x 10-7 d) 7.82 e) -7.82 2. When 0.93 mol of O2 and 0.56 mol of NH3 are mixed together and allowed to come to equilibrium

    asked by tt on August 3, 2011
  27. 7th grade - Social Studies

    how do you think women and native americans felt about not being included under the 14th amendment? how do you think white women felt when former slaves were allowed to vote and they were not? what percent of slaves were not freed after the issue of the

    asked by sheila on October 12, 2009
  28. Chemistry

    Why is the equivalence point of a weak acid-strong base titration above 7.0? How can the data reflect this? The titration of a weak acid with a srong base produces a salt of the two. The anion is hydrolyzed in water solution but the cation is not. A^- +

    asked by Anonymous on April 23, 2007
  29. Chemistry

    1) Assume that the reference half-cell is changed to a standard mercury-mercury (II) half-cell. a) What would be the reduction potential of a standard chlorine half-cell. c) What would be the cell potential of a standard chlorine-nickel cell. 2) For each

    asked by Alex on March 5, 2008
  30. Chemistry

    1) Assume that the reference half-cell is changed to a standard mercury-mercury (II) half-cell. a) What would be the reduction potential of a standard chlorine half-cell. c) What would be the cell potential of a standard chlorine-nickel cell. 2) For each

    asked by Anonymous on March 5, 2008
  31. Discipline

    Carl is getting tired of two children in his three-year-old room having wetting accidents on the playground. The class always uses the restroom before they go outside,but two of the boys are wetting themselves at least once a week,making Carl have to send

    asked by Belinda on January 16, 2007
  32. Chem

    There are three questions in particular that I am having problems with. Here they are 1. A standard solution of FeSCN2+ is prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN. The equilibrium concentration of FeSCN2+ ([FeSCN2+]std)

    asked by Mark on January 19, 2009
  33. Chemistry

    I wrote the balanced equation for cream of tartar and baking soda: NaHCO3+KHC4H4O6->KNaC4H4)6+H2CO3 I identified the conjugate acid base pairs: NaHCO3 and H2CO3, KHC4H4O6 and KNaC4H4O6 I wrote a balanced equation for carbon dioxide gas and water:

    asked by Bridget on November 30, 2015
  34. Differental Equations

    a) Sketch the phase line for the differential equation dy/dt=1/((y-2)(y+1)) and discuss the behavior of the solution with initial condition y(0)=1/2 b) Apply analytic techniques to the initial-value problem dy/dt=1/((y-2)(y+1))), y(0)=1/2 and compare your

    asked by Erica on February 3, 2013
  35. Differential Equations

    a) Sketch the phase line for the differential equation dy/dt=1/((y-2)(y+1)) and discuss the behavior of the solution with initial condition y(0)=1/2 b) Apply analytic techniques to the initial-value problem dy/dt=1/((y-2)(y+1))), y(0)=1/2 and compare your

    asked by Erica on February 3, 2013
  36. Differential eqns

    a) Sketch the phase line for the differential equation dy/dt=1/((y-2)(y+1)) and discuss the behavior of the solution with initial condition y(0)=1/2 b) Apply analytic techniques to the initial-value problem dy/dt=1/((y-2)(y+1))), y(0)=1/2 and compare your

    asked by Erica on February 3, 2013
  37. Biology

    Conducting cells in xylem are: Sieve tube elements Tracheids Tracheids and vessel elements Vessel elements Tracheids and sieve tube elements please help with my homework thanks.

    asked by Sarah on February 27, 2014
  38. health

    Drinking during pregnancy can cause A.attention deficit disorder in child B.Poor academic performnce in child C.Birth defects in child D.All of the above I put D but i got it wrong

    asked by vanessa on November 2, 2012
  39. Chemistry

    Given 2.05 mol Hg find mass Hg 2.05 mol Hg x 200.59g Hg / 1 mol Hg =411g Hg My question is would my answer be wrong if I put it in scientific notation 4.11E2

    asked by Monique on September 25, 2011
  40. SCIENCE HELP

    How will the spacecraft for this mission be designed? What parts are for overcoming the challenging conditions? What parts are for collecting data? What are other parts of the design? I planned to go to mercury- what do I put:(((

    asked by Areana on November 5, 2015
  41. Math

    The shot used in men’s shot put has a volume of about 905 cubic centimeters. With V = (4/3) pi r^3 i need help to find the radius of the shot with the formula. is the shape supposed to be a cylinder ?

    asked by anonymous on August 30, 2018
  42. algebra 1

    Q: A rectangle has a length of 9.00 inches and a width of 4.25 inches. What is the area in square inches? Round to the correct significant digits. I put 38.25 the first time but it said it was wrong. would it be 38 instead??

    asked by x on August 23, 2018
  43. English

    This line: "the noblest and most agreeable of all possible castles." Would you say its more exaggerated or sarcastic? Its from the story, Candide. I put it down as exaggerated but wanted to make sure I was correct. Just by the tone of it, he seemed like he

    asked by Justine on July 6, 2016
  44. educational and tecnology

    Social networking websites put the responsibility for intellectual property on whom? the website host the website user the Internet provider he website creator

    asked by jjiiddss on February 4, 2016
  45. physics

    A 2.49-m-long string, fixed at both ends, has a mass of 7.17 g. If you want to set up a standing wave in this string having a frequency of 455 Hz and 5 antinodes, what tension should you put the string under?

    asked by janny on March 3, 2012
  46. tech

    Social networking websites put the responsibility for intellectual property on whom? the website host the website user the Internet provider he website creator C?

    asked by Anonymous on January 23, 2014
  47. math

    how would I check this on my own? I know you put numbers in the place of the letters but when I do that I come up with my moms answer. this is what i have when I check my work. p=-2 q=3 6*(-2)*3 =-36 but 3(-2)(-2*3)=36 could you tell me what i'm doing

    asked by TiffanyJ on October 22, 2010
  48. Bio

    Insulin, antibodies, enzymes and progesterone are four of many molecules found in and around cells. Of these four__________ are/is not a protein. (Points: 4) a. antibodies b. insulin and antibodies c. antibodies and progesterone d. progesterone The reason

    asked by Josh on June 17, 2006
  49. CHEMISTRY

    How do you get the concentration with buret readings? What would the concentration of HC2H3O2 (M) be? For example, Molarity of the NaOH solution: 0.2619 M Final buret reading: 31.10 ml Initial buret reading: 0 Volume of NaOH solution: 31.0 ml concentration

    asked by Anna on March 20, 2013
  50. Mat/117 DQ1

    How do you know if a quadratic equation will have one, two, or no solutions?Please give examples. How do you find a quadratic equation if you are only given the solution? Please give an example.Is it possible to have different quadratic equations with the

    asked by Rose on February 27, 2012
  51. Chemistry

    1. If a student forms CaCO3 from the presence of carbon dioxide, but continued with the trial anyway, how would this affect his/her calculations (too high, too low, or no effect)? Explain your answers. a) The volume of NaOH required for the back titration.

    asked by Josh on April 2, 2013
  52. Chemistry

    1. How would using 0.42 g CH3CO2Na * 3H2O instead of the amount called for in the procedure change the theoretical yield of Fe(C5H7O2)3 = 3.53g. 2. When a student sees crystals form after she added a few drops of water to the filtrate. Need chemical

    asked by Anonymous on October 29, 2012
  53. Honors Chemistry

    1. .0025 M tartaric acid completely reacts with .0030 M of Al bicarbonate if .913 l of CO2 forms at 298 Kelvin with pressure of 1.4 ATM how much base used? 2. 3.1 x 10^23 molecules of .0035 M hydriodic acid reacts with 25 grams of magnesium bicarbonate how

    asked by Bill on May 21, 2012
  54. Electrophoresis

    You need to prepare 400 ml of a 4M glucose solution. It's chemical formula is C6H12O6 and its formula weight (FW) 180.16. Must show all work and calculation and then list what you will mix together to prepare the correct amount of this solution. 180.16 of

    asked by Mia on September 26, 2014
  55. math

    Whatwould be the answer 3+9+6+52x963+??? The answer depends upon where you put the parentheses. The order of operation makes a big differnece The answer depends upon where you put the parentheses. The order of operation makes a big differnece I agree with

    asked by Crystal on February 23, 2007
  56. Math

    Marcus studies two plant cells in biology class. One cell measures 8.0 * 10^-4 centimeter across. The other cell measures 2.0 * 10^-3 centimeter across. Marcus wants to know how many times greater the size of the larger cell is. He concludes that the

    asked by Kat on October 19, 2018
  57. History

    ***= my answers 5.) A principle that divides power among the executive, legislative, and judicial branches of government is known as separation of powers. *** checks and balances. open door policy. referendum. 6.) Loyalists differed from Patriots in that

    asked by mstv on November 19, 2015
  58. Statistics

    One of your friends is comparing yeast fermentation rates when yeast is grown in a solution containing glucose (G) and when grown in a solution containing starch (S). The friend starts with no expectations about which feeding medium will give higher yields

    asked by Abenaa on May 3, 2013
  59. Chemistry

    Concentrated hydrochloric acid is a 38% solution of HCL in water and has a density of 1.18g/ml. How many milliliters of concentrated hydrochloric acid are needed to prepare 500ml of 1:200 HCL solution? The answer is not 2.12ml My calculation: 1.18g/ml x

    asked by Fai on July 29, 2012
  60. Algebra

    Suppose that a virus doubles every 3 hours. If a person has 30 virus cells, how many will he have after 9 hours? I got 810,000. 30*30=900 900*900=810,000 or would it be 240 since 30*2=60 60*2=120 120*2=240

    asked by elioseaowl on May 25, 2015
  61. Chemistry

    The standard electrode potential for Zn/Zn2+ and cu/cu2+ are -0.96volts and +0.3volts respectively at 293k.(a) calculate the free energy change when a zinc rod dips into 1M of zinc tetraoxosulphate(vi) solution and a copper rod dips into a 1M of copper

    asked by Queeneth on May 25, 2017
  62. chemistry

    I have many questions. I have a test tuesday and need to get these problems done and understand them today because i am currently studying. I am in college and my professor has not emailed me back regarding solutions for the review problems she posted. Is

    asked by Sarah (C) on April 23, 2011
  63. Chemistry

    Chemical Kinetics Lab - Ascorbic Acid Reduction of Iron (III) The object of this experiment was to determine a rate law and a rate constant. The reaction that was studied was: 2 Fe(CN)6 ^-3 + C6H8O6 = 2 Fe(CN)6 ^-4 + C6H8O6 + 2H ^+ Summary of obtained

    asked by Amy on November 12, 2012
  64. Science 7R Q2

    What is the difference between a plant cell and an animal cell? a. plant cell have cell wall a animal cell don't b. a plant cell have cholroplast and a animal cell don't c. plant cell have a huge vacuole and a animal cell have a small vacuole d. animal

    asked by Laruen on January 16, 2012
  65. Chemistry

    CaCl2(s) -> Ca(aq) + 2Cl(aq) ΔH_rxn = +198.0 KJ "If that g sample of calcium chloride was dissolved in 1000.0g of water, with both substances originally at 25.0C, what would be the final temperature of the solution be? Assume no loss of heat to the

    asked by Maddison on September 24, 2016
  66. CHEMISTRY

    When 50.0 cm3 of 0.100 mol dm-3 AgNO3 is mixed with 50.0 cm3 of 0.0500 dm-3 HCl in a polystyrene cup, the temperature increases from 20.00°C to 20.35°C. Assume that the specific heat capacity of the solution is the same as that of water, and that the

    asked by Anonymous on November 12, 2013
  67. Organic CHemistry Please help me out

    In the accompanying chart are appropriate vapor pressures for benzene and toluene at various temperatures: Temp (C) mmHg Temp (C) mmHg Benzene 30 120 Toluene 30 37 40 180 40 60 50 270 50 95 60 390 60 140 70 550 70 200 80 760 80 290 90 1010 90 405 100 1340

    asked by Aishwarya on October 17, 2013
  68. Please correct sentence

    Richard III supposedly had the young princes murdered. Found out what really happened to them. First part is a sentence. Second part is a fragment. How will you correct the fragment? http://grammar.ccc.commnet.edu/grammar/fragments.htm =) look in the

    asked by Anonymous on January 10, 2007
  69. Chemistry

    The quantity of antimony in an ore can be determined by an oxidation-reduction titration with an oxidizing agent. The ore is dissolved in hot, concentrated acid and passed over a reducing agent so that all the antimony is in the form Sb3 (aq). The Sb3 (aq)

    asked by Anon on December 2, 2012
  70. Chemistry

    The quantity of antimony in an ore can be determined by an oxidation-reduction titration with an oxidizing agent. The ore is dissolved in hot, concentrated acid and passed over a reducing agent so that all the antimony is in the form Sb3 (aq). The Sb3 (aq)

    asked by Anon on December 3, 2012
  71. Chemistry

    4.How many grams of calcium chloride can be prepared if a student uses 500g if calcium carbonate and 2.00L of a 4.00 Mol/L sodium chloride solution in the reaction.?? 5. 2KMnoO4 + 5 H2C2O4

    asked by Alex on June 5, 2009
  72. world history

    I need help in the Yom kippur war 1973. In one-two paragraphs, explain the event that you chose. Be sure to mention those directly involved in the event, its causes, what happened, and its final outcome. and it says stay away from online study guides and

    asked by Alex on April 27, 2011
  73. Physical Chemistry

    Calculate the concentrations of each of the following solutions. (a) the molality of chloride ions in an aqueous solution of iron(III) chloride for which xFeCl3 is 0.0195 (b) the molality of hydroxide ions in a solution prepared from 9.16 g of barium

    asked by Trixie on February 15, 2010
  74. math

    A chemist has 80 pints of a 20% iodine solution. How many pints of iodine must be added to produce a solution that is 33.1/3% iodine? Please help me work this through Let X be the number of pints of iodine that must be added. You start out with a mix that

    asked by :) on March 2, 2007
  75. Chemistry

    1. Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br− and C9H7N is quinoline, an organic base with pKb = 6.24 at 298 K. If you like, you may

    asked by Mcmaster university on November 30, 2014
  76. Chemistry

    OK I just need help with two final problems that I am stuck on: The problem states the calcium carbonate in limestone reacts with HCl to produce a calcium chloride solution and carbon dioxide gas CaCO3(s)+2HCl(aq)-->CaCl2(aq)+H2O(l)+CO2(g) 1)Find how many

    asked by TT on December 9, 2010
  77. chemistry

    calcium nitrate + sulfuric acid =caso4+? write a balanced chemical equation for this reaction including states. Ca(NO3)2 + H2SO4 ==> CaSO4 + 2HNO3 You don't have enough information to provide states. CaSO4 will be a solid so you write CaSO4(s). H2SO4 will

    asked by walter on July 30, 2007
  78. math

    Ron has a piece of rope 6 1/2 long,Tony has one that is 7 2/3m long.How long are their ropes if put together?

    asked by lea on September 24, 2016
  79. Math help needed

    1. x^9 over x^2 (1 point) x^11 x^7 7 x^5 2. H^14 over h^5 (1 point) h^-9 1 over h^9 h^19 h^9 3. 4^4 over 4^6 (1point) –16 16 1/16 –1/16 4. 50 (1 point) 0 5 1 –5 Please I barely understand this but Ima try to put in what I think it is. MY answers: 1.

    asked by This Girl on May 20, 2013
  80. Math

    I am a number between 20 and 30. When you put me into 7 equal groups, there is an odd number in each group and 2 are left over. What number am I

    asked by Everette on December 15, 2014
  81. Math

    The sum of four consecutive even integers is the same as the least of the integers. Find the integers. I'm not sure how to solve it and put it in an equation!

    asked by Ally on October 8, 2015
  82. math

    i am a number between 20 and 30. put me into 6 equal groups.ther is a even number in each group and one is left over. what number am i?

    asked by Anonymous on February 8, 2011
  83. algebra

    Find the slope of the line 8x+y=11 Put it in point slope form: y= -8x + 11 slope: -8 y intercept: 11 Thank you

    asked by jacque on March 3, 2007
  84. Chemistry

    a volume of 50mL of a standard HCl solution is needed to neutralize 50 mL of 1x10-2 M NaOH. what volume of this HCl solution is needed to neutralize 50 mL of 1x10-2 M Ba(OH)2

    asked by Bianca on May 3, 2010
  85. MAT222

    -x+4y=4 x-4y=-4 the system has no solution the system has a unique solution: the system has infinitely many solutions they must satisfy the following equation: y=0 the answer is the system has many solutions i just don't know the answer to the equation y=?

    asked by Kia on September 1, 2014
  86. chemistry

    Given a saturated solution of CaF2, write the ionic equilibrium and use it to calculate the solubility of CaF2. My answers for the ionic equation and ksp values are CaF2(s)Ca2+(aq)+ 2F-(aq) Ksp= [Ca2+][F-]2 ksp=2.02*10^-4 it asks what will happen to the

    asked by Ashlee on October 29, 2012
  87. Engineering

    You have two balloons, one large (30 cm in diameter) and one small (15 cm in diameter) filled with helium. Both balloons are made of the same material (latex) and have the same unfilled material thickness (2 mm) and have a 3 cm diameter. You release both

    asked by bobby on August 21, 2012
  88. chem

    A 4.55L sample of water contains .115g of sodium ions. Determine the concentration of sodium ions in ppm if the density of the solutions is 1.00g/mL. Ok so ppm=mass of solute/mass of solution *10^-6 so we have the mass of the solute .115g and for the

    asked by natash on May 9, 2008
  89. chemistry

    To create a 0.1 M carbonate buffer pH = 10.2. You choose to use a combination of HCO3- / CO32-. This buffer system has pKa = 9.9.   a) Calculate how much you need to weigh in each of the sodium salts, NaHCO3 and Na2CO3, to create 1.0 L carbonate (with

    asked by Maria on September 9, 2016
  90. chemistry

    #2) Consider the preciditation reaction of a solution containing 3.50 grams of sodium phosphate mixed with a solution containing 6.40 grams of barium nitrate. How many grams of Barium phosphate can form? Ba(NO3 )2 + Na3 PO4 yields Ba3 (PO 4 )2 + NaNO3 #2b)

    asked by lyne on January 29, 2009
  91. Chemistry

    Consider the following reaction. CaSO4(s) reverse reaction arrow Ca2+(aq) + SO42-(aq) At 25°C the equilibrium constant is Kc = 2.4x10^-5 for this reaction. (a) If excess CaSO4(s) is mixed with water at 25°C to produce a saturated solution of CaSO4, what

    asked by Anonymous on October 29, 2016
  92. Algebra

    Snape has 2000 mL of a magic potion that is 30% DeMuggle Juice. He also has hundreds of 25 mL bottles that are full of 75% DeMuggle Juice solution. Every time he waves his wand, one of these bottles is added to his magic potion. How many times must he wave

    asked by Meghan on February 6, 2009
  93. mass percent

    Suppose 22.93mL of KMnO4 solution used in the question above (KMnO4 solution in above question had concentration of 0.02036M)are needed to oxidize Fe(2+) to Fe(3+) in a 0.4927g pill. What is the mass percent of FeSO4*7H2O (molar mass 278.03g/mol) in the

    asked by Meso on May 22, 2011
  94. Chemistry

    The tin (II) fluoride in a 10.000 g sample of toothpaste is extracted into solution and them a precipitate of lanthanum (II) fluoride (LaF3) is formed by the addition of a lanthanum (III) nitrate solution. If the mass of the lanthanum (III) fluoride

    asked by Colby on July 29, 2013
  95. Chemistry

    Determine the hydronium ion concentration in a solution that is 0.00027 M HCl. Answer in units of M. Determine the hydroxide ion concentration in a solution that is 0.00027 M HCl. Answer in units of M. This is a two part question and I have tried multiple

    asked by Radio Active Wear on April 14, 2015
  96. Chemistry

    A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 235 torr. Pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature. What is the mole fraction

    asked by Emma on February 11, 2013
  97. Chemistry La

    An unknown solution may contain some of the cations listed below. One student preformed a series of experiments to determine what ions are in the solution. Based upon the experiments performed by the students, the results are as follows: a) On addition of

    asked by Joey on October 5, 2017
  98. chemistry

    what would be the name for Hsubscript 2 S? hydrogen sulfide gas? If it is in water solution, it has another name. what do you mean "if it is in a water solution it has another name"? You can't mix gas with water. You can change compounds from solid to

    asked by Anonymous on June 6, 2007
  99. Chemistry

    Benzene sulfonic acid, C6H5SO3H, is a strong acid and will neutralise sodium hydroxide solution (a 1:1 molar ratio). Benzene sulfonic acid crystals (y grams) were weighed into a titration flask and titrated against sodium hydroxide solution (1.0 M) and

    asked by S on June 15, 2014
  100. chemistry step by step for me

    100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final density is 1.25g/ml. 50ml of 20.8% bacl2 and 100ml of 938% h2s04 solutions are mixed. Molarity of cl ions in

    asked by Ken on November 16, 2014