1. Chemistry

    This is for a titration, to measure the amount of acid that can be neutralised by gaviscon. I know how to work out the first 3 but I'm not sure on the others. I think i need to use the calculation c=n x v but i don't know where and why? Theory. How do you

    asked by Anonymous on December 9, 2008
  2. chemistry 101

    If 15g of NaOh is dissolved in 285 g of water, calculate the following. Assume the density of the solution is 1.06 g/cc. a) Calculate the moles of NaOH in the solution? My answer is 15gNaOH/40g NaOH= .0375 mole NaOH b) Waht is the mass % w/w of the

    asked by Tracy on December 8, 2012
  3. Chemistry

    Zinc metal reacts with hydrochloric acid according to the following balanced equation. Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) When 0.114 g of Zn(s) is combined with enough HCl to make 51.1 mL of solution in a coffee-cup calorimeter, all of the zinc reacts,

    asked by dina on April 2, 2010
  4. algebra

    4xy3(2x-y)(3x+5) the Y is to the third power. Im having a problem multiplying this binomial. I get confused with the X and the Y after the FOIL method is completed

    asked by doc.mims on August 19, 2005
  5. Calc 1

    Find the limit. Use l'Hospital's Rule if appropriate. If there is a more elementary method, consider using it. lim x→0 (7x−sin 7x)/(7x−tan 7x)

    asked by TayB on April 20, 2015
  6. chemistry II

    What are the steps to balancing Redox reactions using the Valence method. thanks> ex problem: NH3+O2 -->H2O +NO

    asked by Taylor on October 17, 2010
  7. Algebra

    Discuss the relationship between the FOIL method for multiplying polynomials and the distributive property of multiplication.

    asked by John on August 28, 2012
  8. Java

    What would happen if I did not give a access specifier. Would the class method or attribute be accessible to all other classes?

    asked by jake on May 7, 2014
  9. Algebra

    I also need you to check and make sure that I am using the FOIL method correctly for this problem. #82). 9w-w^3 9w-w^3=w*(w^2-9) I have to factor out the GCF, which is “w”. 9-w^2=3^2-w^2= (3-w) (3+w) = (3-w) (w+3) 3-w=-(w-3) (3-w)(W+3)=-(w-3) (w+3)

    asked by Lisa on August 10, 2014
  10. Psychology

    What is the advantage and disadvantage of the survey method on whether a given political candidate will be popular with Latino voters?

    asked by Shandreca on May 6, 2011
  11. Physical Science

    Why do astronomers when using the method to calculate the distance to stars, they measure the parallax angels exactly 6 months apart?

    asked by Hannah on November 26, 2013
  12. statistics

    use the quick method to estimate the margin of error for conclusions about all 620 adults with 95% confidence

    asked by kim on December 8, 2011
  13. calculus

    Find the volume generated by revolving the region bounded by x=1, y= e^x/2, y= e^x about the x-axis? Using the washer method?

    asked by Anonymous on April 9, 2019
  14. Calculus

    Verify that the volume of a cylinder of radius r and height h is given be the formula v= pi*r^2*h using cylindrical shell method.

    asked by drew on March 18, 2010
  15. Voltage difference

    I am trying to understand what the effects of a voltage difference would have in the method of electrostatic charge spray painting.. Any one?

    asked by Alice on April 28, 2010
  16. Math

    I don't understand this problem could someone please explain it? Use the missing factor method to find the quotient: 3/5 / 2/3. Thanks.

    asked by B.B. on July 5, 2009
  17. math

    "Find a quick and easy method to compute the sum of the first 100 counting numbers."

    asked by Terri on February 6, 2010
  18. science

    How would you write a method on a hypotheses relating to meaning in life and both physical and psychological well-being scores.

    asked by Eid2013 on October 23, 2013
  19. Math

    What does 3^4x2^3x5^2/3^2x5x2^3 equal? Using the method of sorting the bases and subtracting the exponents.

    asked by Nicole on October 23, 2013
  20. Math.. Please help!

    What does 3^4x2^3x5^2/3^2x5x2^3 equal? Using the method of sorting the bases and subtracting the exponents.

    asked by Nicole on October 23, 2013
  21. Science

    What is the first step in the scientific method? (I WAS ABSENT DURING LESSON) A- Observation B- Hypothesis C- Conclusion D- Test

    asked by Servanshia on September 11, 2014
  22. physics

    i want a simple laboratory method of determining a young modulus of a long thine wire

    asked by ahmad muhamad chul on August 21, 2012
  23. Science HP

    When using the method to calculate the distance to stars, astronomers measure the parallax angels exactly 6 months apart. Why? Can you please help? Thank you.

    asked by Chelse on November 25, 2013
  24. chemistry

    Balance by oxidation method the SO2 + MnO4+H2O --MnSO4+H2SO4+SO4(-2)

    asked by alex on July 7, 2014
  25. Science

    When using the method to calculate the distance to stars, astronomers measure the parallax angels exactly 6 months apart. Why? Please help!

    asked by Sam on November 25, 2013
  26. Chemistry

    Propose a method for determining the specific heat for a metal like sodium that reacts with water?

    asked by Dick Rogers on September 14, 2007
  27. calculus

    Use the Euler Method with a step size of 0.2 to estimate f(3) where f′(x)=2x−7 and f(2)=4. Your answer should be correct to two decimal places.

    asked by lisa on March 9, 2013
  28. math

    Using the Rule of 72, determine approximately how long it will take for Carolyn to double her money. Can you find more than one method of doing this?

    asked by A on July 22, 2019
  29. Calculus

    the region D is the triangle with vertices (1,1) (3,1) (3,2) about the y-axis find r(x) and h(x) using the shell method. My teacher got r(x)=x and h(x)=(1/2x+1/2)-1 but how did he get the equation for h(x)??

    asked by Anonymous on June 8, 2017
  30. Math

    Use Newton's method to find a value of x that satisfies: e^x- (x^2/2) = 0 Use the starting value x0=0. Display answer in 4 significant figures

    asked by Michael on November 15, 2012
  31. chemistry

    source of errors in determining transport number of k+ ion by moving boundary method

    asked by hamza on October 15, 2014
  32. Pre-AP Chemistry

    What method would be used to determine the thickness of an oil spill? What information would be needed? Please be specific. I need help FAST

    asked by Anonymous on October 7, 2010
  33. Ap Calculus

    Find the following volumes formed by rotating the region bounded by: y=x^2, x^2+y^2=-2 (set up using shell method)

    asked by Kaylea on April 16, 2015
  34. mathematics

    by prime factorisation method find the least positive number divisible by 700 and 364

    asked by Anonymous on May 21, 2011
  35. math

    Use a graph of f or some other method to determine what, if any, value to assign to f(a) to make f continuous at x = a. HINT [See Example 2.] (If there is no such value, enter NONE.) f(x) = x 2x2 − x ; a = 0

    asked by LA on February 4, 2011
  36. design of rc structure

    1. Discuss the salient feature of working stress methods and ultimate load method?

    asked by rakesh on January 5, 2013
  37. Accounting

    good such as milk bread and chesse would problably be costed using what method of inventory costing

    asked by Adriana on January 4, 2013
  38. Chemistry

    Complete and Balance the following equation using the half-reaction method; (MnO4^-) + (CH3OH) --> (Mn^2+) + (HCO2H)

    asked by Kelli on February 12, 2013
  39. math

    2Tons=____oz Try the method DrWLS or I showed you. Then repost if you don't understand but tell us what you are having trouble with.

    asked by brooke on November 30, 2006
  40. Computer Programming

    How do I make a util class with a method name that is add, and returns the result by adding two numbers.

    asked by Jake on July 8, 2015
  41. accounting

    Goods such as milk, bread, and cheese would probably be costed using the _______ method of inventory costing.

    asked by Michelle on February 28, 2012
  42. Chemistry

    Propose a method for determining the specific heat for a metal like sodium, which reacts with water.

    asked by M on October 15, 2007
  43. chemistry

    State one method of preparing oxygen in the lab and wrte a balanced equation for the reaction

    asked by +2347034420247 on March 11, 2010
  44. psychology

    The only research method that can determine whether a cause-effect relationship exists between two factors is called a(n) __________.

    asked by Emily on July 3, 2015
  45. Chemistry

    Balance the equations for oxide reduction method: KMnO4 + KCl ---> MnCl2 + Cl2

    asked by Julia on January 26, 2016
  46. Math

    hi guys! I was wondering how to do x6-18x2+8 divided by factor x2-4 I normally use synethetic division what else easier method should i use?

    asked by Sabrina on October 6, 2010
  47. science

    which of the following is not a method of asexual reproduction ? a) regeneration b) vegetative propagation c) budding d) meiosis e) mitisos

    asked by victoria on February 3, 2014
  48. quadratics math 11

    How to use the method of decomposition of this trinomial and turn it into standard form: 0.005x^2 - 0.801x + 26.928

    asked by Jessica on March 10, 2019
  49. chemistry

    how do I know the ion value of elements on the production side of the equation when balancing with the electron transfer method?

    asked by stephanie on November 14, 2007
  50. chemistry

    Ag+HNO3-----AgNO3+NO+H2O balance the redox reaction using the oxidation-number method

    asked by sally on February 20, 2011
  51. English

    If you suspect that readers are interested in your topic, you may choose a _______ method of organizing your essay.

    asked by Joann on November 9, 2016
  52. Chemistry

    A method of separation useful for purification and isolation is________ Decantation Crystallization Evaporation Filtration

    asked by Sodiq on May 24, 2017
  53. Math

    Can someone check this problem for me use the foil method to find the product (6z-u)(6z+7u) my answer is 36z^2+36zu-7u^2

    asked by Bryan on April 28, 2009
  54. Science

    can someone help one this question? suppose you are given two liquids and told that one is a compound and the other is a mixture. how might you determine which was which? describe one method you could use. please and thank you

    asked by iNeedHelp on September 19, 2009
  55. com140

    Suggest options for presenting information to an audience. Which method do you think is the most effective? Explain your answer.

    asked by ano on August 5, 2008
  56. math

    Find the GCF of the numbers using an appropriate method.Explain your reasoning. 240; 10,000 and 4500

    asked by Sarah on August 19, 2010
  57. Chemistry

    Describe an experimental method for the estimation of oxalate in the product, potassium trioxalatoaluminate(III)

    asked by ESPINE on March 7, 2013
  58. math

    find the local maximum and minimum values of f using both the first and second derivative tests. which method do you prefer? f(x) = x/(x^2+4)

    asked by Sasha on November 7, 2010
  59. Chemistry

    Propose a method for determining the specific heat for a metal like sodium, which reacts with water.

    asked by M on October 15, 2007
  60. Biology

    Why can this statement not be evaluated by the scientific method "Trees emit psychic screams when you cut them down."?

    asked by Anonymous on February 15, 2012
  61. maths....(mathematics..)

    by prime factorisation method find the least positive number divisible by 700 and 364

    asked by .... on May 25, 2011
  62. Calculus

    Sorry, I need more help! I am reallly struggling with Euler's method, and here's a problem I need help on: y'=2y + sin(x), y(0)=0, dx=0.1, the interval is 0 to 1, and f(x)= [e^(2x)-2sin(x)-cos(x)]/5

    asked by Raine on December 18, 2006
  63. chemistry

    How to balance simple oxidation-reduction reactions by the half-reaction method. Mg (s) + N2 (g)= Mg3N2 (s)

    asked by ron on September 30, 2012
  64. math

    Discuss the relationship between the FOIL method for multiplying polynomials and the distributive property of multiplication.

    asked by Leo on February 3, 2012
  65. Calc 1

    Find the limit. Use l'Hospital's Rule if appropriate. If there is a more elementary method, consider using it. lim x→0+ (sinx ln2x)

    asked by TayB on April 20, 2015
  66. easy math

    I converting 0.001mm to micrometers using staircase method and micro come under millimeter, so that mean move one decimal to right so would it not be 0.01?

    asked by Shreya on January 31, 2012
  67. Social studies

    Why the scientific method is better than Aristotelian science and divine Biblical knowledge..? about Galileo on Trial

    asked by unknown on February 15, 2017
  68. psychology

    Case study method to investigate a mother's experience in raising a child with autism

    asked by Jean on April 20, 2011
  69. Science

    How would you write a method on a hypotheses relating to meaning in life and both physical and psychological well-being scores.

    asked by Eid2013 on October 27, 2013
  70. chemistry

    I'm supposed to find the pH of .1M HC2H3O2. since this is a weak acid, i used the ICE method with the given 1.8x10^-5 ka. and i got a pH of 4.4, but it was wrong....

    asked by tia on April 9, 2008
  71. calculus

    find the local maximum and minimum values of f using both the first and second derivative tests. which method do you prefer? f(x) = x/(x^2+4)

    asked by Sasha on November 7, 2010
  72. FINANCE

    how long would it take an investment to halve in value if it depreciates at a rate of 12,5% per annum on a straight line method?

    asked by JERRY on September 3, 2014
  73. Math 110

    Write 278 as a product of prime numbers. Multiply 28x72 using lattice method.

    asked by Nikki on March 30, 2014
  74. chemistry

    describe an alternative method to prepare a 0.2M potassium phosphate buffer using KH2PO4 and KOH

    asked by kabelo on February 27, 2011
  75. Chemistry

    Complete and Balance the following equation using the half-reaction method; (MnO4^-) + (CH3OH) --> (Mn^2+) + (HCO2H)

    asked by Kelli on February 12, 2013
  76. maths

    The percentage of sugar in a solution of sugar and water is 9%. If 4 litres of this solution is diluted by adding 500mL of water, what is the percentage of sugar in the new solution?

    asked by Rebecca on April 7, 2013
  77. finance

    Question #28 The construction of abuilding costing $12,0CI0,000 started i* Year I and was completed and occupied in Year 2 (two years constructions). $8,000,000 of the construction costs was incurred in Year I and the halance in Year 2. Using the old rules

    asked by Payal on August 8, 2016
  78. 7th grade math

    Choose the equation that you can use to solve the problem. 1. 86 is 45% of what number? 86 = 0.45n N = 0.45 x 86 0.45 = n x 86 86 = 45n Choose the equation that you can use to solve the problem 2. What percent of 26 is 4? 0.26 = n x 4 n = 0.26 x 4 4 = n x

    asked by -.-hello on February 5, 2019
  79. Geom

    solve for the value of x. C:\Users\Emily Shae\AppData\Local\Microsoft\Windows\Temporary Internet Files\Low\Content.IE5\3J5934JU\paint[1].jpg please help me.. i don't want the answer just how to solve

    asked by Lexi on January 31, 2012
  80. math 106

    A lender offers a choice between two loans. For loan A the lender charges 12% a year compounded 12 times a year. For loan B the lender charges 12.5% a year and compounds it once a year. Is loan A or loan B a cheaper loan for the borrower. Please show

    asked by james smith on June 17, 2017
  81. Chemistry

    Hi I just need help with question (ii) and (iii), i know how to work out (i) A solution is prepared by dissolving 0.2222 (±0.0002) g of KIO3 in 50.00 (±0.05) mL (i) Calculate the molar mass of KIO3 with its associated uncertainty to the correct number of

    asked by Jenny on March 26, 2010
  82. Chemistry

    85.0 mL of 1.50 mol/L ammonium chloride solution is added to 250 mL of water. Calculate the molar concentration of the final solution The answer on the sheet says 0.381 mol/L but I keep getting 0.51

    asked by AmbiguousCase on April 2, 2016
  83. Chemistry(Please help, thank you!!)

    Determine the concentration of a NaOH solution if 27.80mL of NaOH is required to neutralize 10.00mL of a 1.00 M H2SO4 solution. (Hint:Review monoprotic vs. diprotic acids.) would I do (27.80)(10)? Thank you for your help!!

    asked by Hannah on October 25, 2011
  84. chem

    A solution contains 32 g of KNO3 per 100g of water at 25 degree C. Is the solution unsaturated, saturated, or supersaturated? I think its saturated Look at your saturation chart. I will be happy to critique your thinking. is there one online?

    asked by jake on April 5, 2007
  85. Chemistry

    3) A student mistakenly uses the cuvette containing the most dilute standard solution, rather than the cuvette containing deionized water, as the blank solution. I don't understand why there would be lower concentration of Cr(VI) ion...

    asked by Selena on March 2, 2014
  86. Chemistry

    H2SO4 solution containing 200.1g of H2S04 in 0.3500l of solution at 20 degree celcius has a density of 1.3294g/ml. find a,mass percent of H2SO4 b,molarity c,molality

    asked by GETU on December 17, 2018
  87. chemistry

    A buffer solution is prepared by mixing 99.0 mL of 0.450 M HF and 55.0 mL of 1.15 M NaF. Determine the pH of the solution after the addition of 0.01 moles NaOH (assume there is no change in volume when the NaOH is added).

    asked by Hayla on March 1, 2014
  88. Math

    A glass containing 250 mL of 80% iodine solution tips over spelling part of its contents. This subsequently replaced by an amount from a mixture of 40% iodine. If a 72% solution is resulted, how much was spilled?

    asked by Math on October 28, 2016
  89. chemistry

    What is the pH of a solution of a monoprotic acid with a pKa of 6.6 if it is 39.3 % ionized in solution? Just provide the numerical answer, do not prefix with pH. Give your answer to two decimal places. Remember the definition of Ka

    asked by jenna on October 19, 2014
  90. Chemistry

    If 0.630 grams of HNO3 (molecular weight 63.0) are placed in 1 liter of distilled water at 25 degrees C, what will be the pH of the solution? (Assume that the volume of the solution is unchanged by the addition of the HNO3.) A. 0.01 B. 0.1 C. 1 D. 2 E. 3

    asked by Sharon on January 24, 2011
  91. Chemistry

    A solution in which no more solid can be dissoved is referred to as [saturated?] In such a solution, the concentration of solute is called the ____ when reported in g/L and the [molarity?] when reported in mol/L. Does anybody know what might go in that

    asked by Katherine on April 22, 2012
  92. Chemistry

    A solution was made by dissolving 13.4 g of hydrated copper nitrate [Cu(NO3)2.3H20] in water and making it up to a volume of 250 mL. What is the concentration of NO3^-ions in the solution?

    asked by JordanPeara on May 2, 2019
  93. Chemistry

    Excess sodium sulfate is added to exactly 50 mL of a solution containing an unknown amount of silver(I) cation. Determine the concentration of the silver ion in this solution if 3.54 mg of a solid is isolated.

    asked by Anonymous on July 11, 2011
  94. math

    calculate the number of molecule h2s04 present in 250ml of 98% by mass of sulphuric solution. Density of solution is 1.84g/ml Answer 4.6N How do calculation step by step

    asked by Fai on December 21, 2013
  95. chem

    A sample of potassium hydrogen oxalate, KHC204, weighing 0.717 g, was dissolved in water and titrated with 18.47 mL of an NaOH solution. Calculate the molarity of the NaOH solution.

    asked by amanda78 on November 21, 2012
  96. Chemistry

    When a 5.00 ml sample of vinegar is titrated, 44.5 ml of 0.100 m NAOH solution is required to reach the end point. What i sthe concentration of vinegar in moles per liter of solution?

    asked by Amber on November 25, 2012
  97. Chemistry

    Ringer's solution, used in the treatment of burns and wounds, is prepared by dissolving 8.6 g of NaCl, 0.30 g of KCl, and 0.33 g of CaCl2 in water and diluting to a volume of 1.00 L. What is the osmolarity of Ringer’s solution?

    asked by Mike on December 5, 2014
  98. chem

    A scientist wants to make a solution of potassium phosphate, K3PO4 for a lab experiment. How many grams of K3PO4 will be needed to produce 575ml of a solution that has a concentration of K+ ions of 1.4M.

    asked by alex on May 10, 2011
  99. Chemestry

    What volume of 0.140 M K2Cr2O7 will be required to oxidize the Fe2+ ion in 81.5 mL of 0.176 M FeSO4 solution? Cr2O72- + Fe2+ Cr3+ + Fe3+ (acid solution)

    asked by Santiago on November 22, 2014
  100. CHEIMISTRY

    A buffer solution is 0.20 M in HPO42- ions and 0.l0 M in H2PO4- ions. What is the H3O+ ion concentration of the solution? The ionization constants for H3PO4 are as follows: Ka1 = 7.5 ´ 10 -3, Ka2 = 6.2 ´ 10-8, Ka3 = 1 ´ 10-12. a. 3.7 ´ 10-3 M b. 3.7 ´

    asked by james on May 30, 2010

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