1. chem

    An aspirin tablet weighing 0.650 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of

    asked by Un on April 18, 2008
  2. algebra

    The square that I am supposed to complete is x^2+15x, and the answer is (x+15/2)^2. How does this answer account for the 15 separate from the 15^2? I am confuzzled. Same thing goes for x^2-7x the answer is (x-7/2)^2, but I don't see what happened to the

    asked by Elise on November 13, 2008
  3. Chem

    A solution is made by dissolving 26.9 g of NaOH in approximately 450 mL of water in a volumetric flask. The solution becomes quite warm, but after it is allowed to return to room temperature, water is added to total 500 mL of solution. Calculate the pH of

    asked by Anonymous on February 27, 2013
  4. chemistry

    25ml of a solution of na2c03 having a specific gravity of 1.25g ml required 32.9ml of a solution of hcl containing 109.5g of the acid per litre for complete neutralization. Calculate the volume of 0.84N heso4 that will be compltetly neutralized by 125g of

    asked by Fai on February 17, 2013
  5. Math

    Packaging Tangerines The produce manager at the grocery store had 410 tangerines. He put some of them into 15 cartons containing 12 tangerines each. He then put the rest into 14 cartons, each containing the same number of tangerines. How many tangerines

    asked by Anonymous on February 10, 2015
  6. logic

    Given 1/3 Y÷1/2 X=4 Discuss its meaning. Create a shape for X and for Y that will make this true. Draw and label the shapes, then illustrate how the quotient was obtained. Your drawing must be neat and accurate. Can individual pieces of a traditional

    asked by Dell on December 1, 2011
  7. math

    Given 1/3 Y÷1/2 X=4 Discuss its meaning. Create a shape for X and for Y that will make this true. Draw and label the shapes, then illustrate how the quotient was obtained. Your drawing must be neat and accurate. Can individual pieces of a traditional

    asked by dell on December 1, 2011
  8. math

    Given 1/3 Y÷1/2 X=4 Discuss its meaning. Create a shape for X and for Y that will make this true. Draw and label the shapes, then illustrate how the quotient was obtained. Your drawing must be neat and accurate. Can individual pieces of a traditional

    asked by Dell on December 1, 2011
  9. chemistry

    part 1 what is the molality of a solution that is 4.23% by mass sodium iodide. part 2 what is the molarity of the above solution (from part#1) if the density of the solution was calculated to be 1.03 g/ml?

    asked by Anonymous on September 26, 2017
  10. General Chemistry

    An experiment calls for you to use 100 mL of 0.65 M HNO3 solution. All you have available is a bottle of 2.7 M HNO3. How many milliliters of the 2.7 M HNO3 solution do you need to prepare the desired solution?

    asked by Anonymous on September 29, 2015
  11. Chemistry

    a 23ml H2SO4 solution is titrated by 50 ml 0.10 M NaOH solution, what is the molarity of H2SO4 solution? (Note that H2SO4 is a diprotic acid)

    asked by Joel on March 14, 2011
  12. Chemistry

    A salt solution is evaporated to dryness. If 66.5 g of the solution leaves 1,492 mg of dry salt, what is the percent concentration (w/w) of the salt in the solution?

    asked by Marsha on May 6, 2013
  13. chemistry

    How would I make 500 ml's of a .35M NaCI solution. MW= 58.44 ( I know how to do the first part) How many micromoles of NaCI would be present in that solution? What would be the percentage of NaCI in that solution?

    asked by frank on August 27, 2014
  14. chemistry

    part 1 what is the molality of a solution that is 4.23% by mass sodium iodide part 2 what is the molarity of the above solution (from part#1) if the density of the solution was calculated to be 1.03 g/ml?

    asked by hh on September 26, 2017
  15. chemistry

    a salt solution is evaporated to dryness. If 25.7 g of the solution leaves 1,949 mg of dry salt, what is the percent concentration (w/w) of the salt in the solution

    asked by Randy on April 29, 2012
  16. Math Qs. Check!!!!!!

    Jake puts pennies into a jar each morning and lets his brother take haft of the pennies out each morning. Jake put 10 pennies into the empty jar on Monday morning. On Tuesday he put in 15 pennies. One Wednesday he put in 12 pennies. How many pennies are in

    asked by Laruen on September 4, 2012
  17. Math ms sue please please please help!!!!!!

    1)a bag contains five red marbles and seven blue marbles. you pull one marble out of the bag and replace it before putting out a second marble. what kind of event is this? independent, dependent, or both? 2) A bag contains 5 marbles. Without looking, you

    asked by Math help on November 10, 2013
  18. Chemistry

    Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 1.890-g sample of Mg metal is added to 125.0 mL of a 4.00 M HCl solution, and the reaction goes to completion. How many grams of H2 are formed?

    asked by Mike on September 13, 2011
  19. Chemistry 101

    A student needs to run an experiment to determine the amount of substance in the solution. As more of the substance is dissolved, the more red the solution becomes. He is planning on using an absorption spectrometer to measure how much of a wavelength

    asked by Gweedo8 on June 1, 2009
  20. chemistry

    25.00 mL of an acetic acid solution requires 23.86mL of a 0.1550M potassium hydroxide solution to reach the end point. What is the molarity of the acetic acid solution? (Hint: write the chemical reaction, and remember stoichiometry)

    asked by shelley on April 6, 2010
  21. Chemistry

    A solution of potassium permanganate (KMnO4) was standardised by titrating with 0.1908 g of Na2C2O4 dissolved in 50 cm3 of acidified water. The endpoint was reached after 24.50 cm3 of solution had been added. Calculate the molar concentration of KMnO4 in

    asked by Anonymous on October 17, 2016
  22. physics

    Spherical particles of a protein of density 2.0 g/cm3 are shaken up in a solution of 20°C water. The solution is allowed to stand for 1.0 h. If the depth of water in the tube is 3.7 cm, find the radius of the largest particles that remain in solution at

    asked by Anonymous on September 2, 2012
  23. Chemistry

    A solution of potassium permanganate (KMnO4) was standardised by titrating with 0.1908 g of Na2C2O4 dissolved in 50 cm3 of acidified water. The endpoint was reached after 24.50 cm3 of solution had been added. Calculate the molar concentration of KMnO4 in

    asked by Anonymous on October 17, 2016
  24. chemistry

    A sample of 2.50 g LiI is added to 75.0 mL of water initially at 21.0°C. After stirring and dissolving, the temperature of the solution is 24.3°C. Assume that the specific heat of the solution is 4.184 J/g°C, the density is 1.00 g/mL, and the

    asked by MeGaTrOn on May 12, 2017
  25. Chemistry

    Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 1.890-g sample of Mg metal is added to 125.0 mL of a 4.00 M HCl solution, and the reaction goes to completion. How many grams of H2 are formed?

    asked by Mike on September 13, 2011
  26. Chemistry

    If you were to prepare a 1.00 molal solution of CaCl2 beginning with water at 27.0 C, what would the final temperature of the solution be (in C)? Assume that the specific heats of both pure H2O and the solution are the same, 4.18 J/K*g. The dissolution of

    asked by Bob on April 18, 2011
  27. chemistry

    Calculate the pH at the equivalence point for the titration of a solution containing 1250.0 mg of hilariamine (MW = 92.5 g/mol, Kb = 8.1×10−4) with 0.1000 M HCl solution. The volume of the solution at the equivalence point is 175.0 mL. (I got the answer

    asked by vivian on May 15, 2011
  28. chemistry

    Calculate the pH at the equivalence point for the titration of a solution containing 1250.0 mg of hilariamine (MW = 92.5 g/mol, Kb = 8.1×10−4) with 0.1000 M HCl solution. The volume of the solution at the equivalence point is 175.0 mL. (I got the answer

    asked by vivian on May 15, 2011
  29. physics

    Spherical particles of a protein of density 1.4 g/cm3 are shaken up in a solution of 20°C water. The solution is allowed to stand for 1.0 h. If the depth of water in the tube is 4.0 cm, find the radius of the largest particles that remain in solution at

    asked by Bah on September 7, 2012
  30. Chemistry

    A 53 mL sample of a solution of sulfuric acid is neutralized by 37 mL of a 0.18 M sodium hydroxide solution. Calculate the molarity of the sulfuric acid solution. Answer in units of mol/L

    asked by Chemistry on March 24, 2012
  31. intro to chem

    The molarity of an aqueous solution of potassium hydroxide, KOH, is determined by titration against a 0.197 M HI solution. If 28.4 mL of the base are required to neutralize 18.6 mL of HI, what is the molarity of the KOH solution?

    asked by Meseret on August 13, 2013
  32. Chemistry

    1.How many grams of KCl is in 225 mL of a 0.452 M solution? 2.What volume in mL of 0.555 M solution contains 85.0g Na2SO4? 3.How many grams of CaCl2 would be dissolved in 2.0L of a 0.10 M solution of CaCl2? Can you please show me how to do these problems?

    asked by Jamie on April 14, 2015
  33. Chemistry

    A solution is made by mixing 90.6 g of magnesium sulfate heptahydrate with 2320.0 g of water. 690.00 mL of the solution has a mass of 745.20 g. What is the molarity of the magnesium sulfate solution?

    asked by Jade on September 11, 2013
  34. Math

    chandra has 3 liters of a 28% solution of sodium hydroxide in a container. What is the amount and concentration of sodium peroxide solution she must add to this in order to end up with 7 liters of 48% solution?

    asked by Ashley on February 2, 2017
  35. Chemistry

    A 14.7 mL sample of 0.0550 M KOH solution required 55.5 mL of aqueous acetic acid solution in a titration experiment. Calculate the molarity of the acetic acid solution.

    asked by Lane on March 14, 2017
  36. math

    a chemistry experiment calls for 30% sulfuric acid solution. if the supply room has only 50% and 20% sulfuric acid solution on hand,how much of each should be mixed to obtain 12 litres of 30% solution?

    asked by patel on October 20, 2011
  37. Math

    A doctor needs to administer 2 mL of a solution to a 200 pound patient. However, the doctor has the solution availible only in 20 mg/mL strength. What volume of the 20 mg/mL solution would be needed to administer the desired dose?

    asked by LYNN on July 21, 2008
  38. math

    Solve the following system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions x-y=4 3x-5=2

    asked by ,algebra on May 2, 2012
  39. algebra 1

    Solve this system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions. 5x=y=15 3x+2y=9

    asked by Anonymous on June 25, 2012
  40. math

    Solve the following system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions. x-3y=5 2x-6y=10

    asked by ,algebra on May 2, 2012
  41. chemistry

    A chemist added 3.15 grams of HNO3 to a solution of the same acid with concentration of 9 mol/L. dilutes the resulting solution up to the 100ml volume. The resulting solution will have what concentration?

    asked by wallace on August 11, 2018
  42. math

    A doctor needs to administer 2 mL of a 100 mg/mL solution to a 200-pound patient. However, the doctor has the solution available only in 20 mg/mL strength. What volume of the 20 mg/mL solution would be needed to administer the desired dose?

    asked by Jamie on January 1, 2012
  43. AP Chemistry

    A 65 mL sample of a solution of sulfuric acid is neutralized by 46 mL of a 0.14 M sodium hydroxide solution. Calculate the molarity of the sulfuric acid solution. Answer in units of mol/L

    asked by Gabriella on January 30, 2014
  44. Math

    solve 3(2x-2)=18 select the correct choice below& if necessary fill in the answer box to complete your choice. a. the solution is x= simplify answer. b. the solution is all real numbers. c. there is no solution.

    asked by Cathy on September 26, 2009
  45. precalc

    I'm terrible at pre calc, could someone tell me if the solution set for log subscript 2 x + log sub 2 (x-1)=1 is the solution -1? Using either the elimination or substitution method is the solution set for 4x + y =11 and 2x -y = 7 is the answer (3, -1)?

    asked by eragon on January 13, 2007
  46. math

    a chemistry experiment calls for 30% sulfuric acid solution. if the supply room has only 50% and 20% sulfuric acid solution on hand,how much of each should be mixed to obtain 12 litres of 30% solution?

    asked by patel on October 20, 2011
  47. chemistry

    1. what mass of sodium hydroxide is required to make up 100 mL of 0.5000M solution 2.What volume of this solution must be diluted down to 100 mL if 0.100M solution of NaOH is required?

    asked by Anonymous on February 29, 2016
  48. math algebra

    Solve the following system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions. -a+b=-4 2a-3b=-2

    asked by jorge on May 3, 2012
  49. chemistry

    What is the mass of BaCl2 contained in 250 mL of solution since after the addition of 40.00 ml of AgNO3 0.1020M to 25.00 mL of the BACl2 solution, the excess solution of AgNO3 consumed 15.00 ml of NH4SCN 0.09800 M

    asked by Bob on November 13, 2017
  50. Chemistry

    How many grams of nickel (II) sulfate hexahydrate would be present in one liter of a 0.40 molar solution? (Hint: a 1.0 molar solution would have 1 mole of NiSO4*6H2O per liter of solution)

    asked by Jon on April 10, 2011
  51. chemistry

    Sulfuric was titrated with NaOH solution. 208 mL of .250 M NaOH solution was needed to completely neutralize 65.0 mL of H2SO4. What is the concentration of the sulfuric acid solution?

    asked by Trent on January 10, 2011
  52. chemistry

    prepare M/20 solution of oxalic acid. Find out the molarity and strength in gram per litre of the given solution of potassium permanganate with the help of the prepared solution of oxalic acid

    asked by sidd on April 5, 2011
  53. MATH

    Solve this system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions 2x-y=0 3x+y=5

    asked by eric on May 3, 2012
  54. Chemistry

    A 1.0m solution of LiCl decreases the freezing point of water more than a .10 m solution of LiCl. Explain why based on colligative properties. I know that the 1.0m solution would decrease it more, but cannot explain why. Any help is appreciated!

    asked by Anonymous on May 2, 2012
  55. Business

    You are the manager at a company and are asked to present a report on the year-to-date performance of your division. What type of statistical information would you include in your report? In particular, which descriptive statistics (mean, median, standard

    asked by Anonymous on May 19, 2011
  56. math

    a 5% acid solution is mixed with a 9% acid solution. How many ounces of each solution are needed to obtain 40 ounces of a 6% solution?

    asked by lola on February 27, 2014
  57. Chemistry

    Physical Developer (PD) is a set of solutions used to develop latent fingerprints on different porous and nonporous surfaces. It is often used to develop fingerprints on currency. Below are FBI recipes for PD. Solution 1 serves as a cleaning solution

    asked by Kid on March 14, 2018
  58. Algebra

    Here's the question: Jose needs to enclose a rectangular section of his yard. The area is 35 sq. ft. and the perimeter is 27 sq.ft. Find the length and width of the section. The issue I'm having is that I think I need to find the common fators of 35 and 27

    asked by cbarnett on December 19, 2006
  59. Chem

    I got part a but part b I'm having trouble with I keep getting 56.2mL. I'm not sure what the next step is really to find part b. A. How would you prepare 250 mL of a 0.150 M solution of CoCl2 from solid CoCl2 and distilled water? Dissolve 4.87 grams solid

    asked by Micheal on November 8, 2013
  60. algebra

    how do you make a stem-and-leaf plot for numbers like this: 24,000 28,000 26,000 32,000 30,000 41,000 27,000 22,000 26,000 33,000

    asked by s on April 22, 2013
  61. English

    1. Can you imagine people can fly to mars in the future? ------------------- Can we use "believe, guess, suppose, think, and consider" instead of 'imagine? 2. Put on the helmet for safety. 3. Wear the helmet for safety. (Are they all the same in meaning?

    asked by rfvv on November 25, 2016
  62. Chemistry

    So we're doing oxidation-reduction reactions and batteries and voltages. We did a lab where we would take two metals, put it in a mixture (bleach/water/vinegar/salt) and used a voltmeter to see the DC voltage. Now we're supposed to 'calculate the potential

    asked by Ari on May 5, 2013
  63. Math

    One solution contains 25% as much water as alcohol and another solution contains 5 times as much water as alcohol. How many gallons of each solution must be mixed in order to obtain 7 gallons of the new solution which contains as much water as alcohol?

    asked by Ben on July 27, 2015
  64. chemistry

    A solution is 40% acetic acid by mass. The density of this solution is 1.049 g/mL. Calculate the mass of pure acetic acid in 170 mL of this solution at 20 C. Answer in units of g The density of a solution of sulfuric acid is 1.29 g/cm3 and it is 38.1% acid

    asked by K on September 2, 2013
  65. Physical Chemistry HELP!!!!!

    A solution of the sugar mannitol ( molar mass 182.2 g/mol ) is prepared by adding 54.66 g of mannitol to 1.000 kg of water. The vapor pressure of pure liquid water is 17.54 torr at 20o C. Mannitol is nonvolatile and does not ionize in aqueous solution. a.)

    asked by Lan on October 14, 2006
  66. vapor and osmotic pressure

    A solution of the sugar mannitol ( molar mass 182.2 g/mol ) is prepared by adding 54.66 g of mannitol to 1.000 kg of water. The vapor pressure of pure liquid water is 17.54 torr at 20o C. Mannitol is nonvolatile and does not ionize in aqueous solution. a.)

    asked by Amy on October 12, 2006
  67. P Chem

    A 10.0% by mass H2SO4(aq) solution has a density of 1.07 g/mL. (a) How many milliliters of solution contain 8.41 g of H2SO4? (b) What is the molality of H2SO4 in solution? (c) What mass (in grams) of H2SO4 is in 258 mL of solution?

    asked by Jenny Marie on May 24, 2010
  68. Algebra 116

    I need help with these algebra problems please. 1.Solve by using the substitution method. a. 8x - 3y =-61 7x + 68 = y What is the solution system _____? b. 4m + n =27 m - 2n = 9 What is the solution system_______? c. 8x + 9y = -15 -6x + y = 19 What is the

    asked by MzMaria on September 16, 2008
  69. Science

    1. How do plants survive? 2. What is photosynthesis? 3. What are needed in the food-making process of plants? 4. What are the parts of the leaf that help in food-making process of plants? 5. How do plants store energy?

    asked by Chelsea on November 11, 2010
  70. Math

    Packaging Tangerines The produce manager at the grocery store had 410 tangerines. He put some of them into 15 cartons containing 12 tangerines each. He then put the rest into 14 cartons, each containing the same number of tangerines. How many tangerines

    asked by Anonymous on February 10, 2015
  71. AP Chemistry

    CH3NH2(aq)+H2O(l)=>CH3NH3+(aq)+OH-(aq) Kb=4.4 x 10^-4 Methylamine, CH3NH2, is a weak base that reacts with water according to the equation above. A student obtains a 50.0 mL sample of a methylamine solution and determines the pH of the solution to be

    asked by Christina on May 2, 2013
  72. chemistry

    CH3NH2(aq)+H2O(l)=>CH3NH3+(aq)+OH-(aq) Kb=4.4 x 10^-4 Methylamine, CH3NH2, is a weak base that reacts with water according to the equation above. A student obtains a 50.0 mL sample of a methylamine solution and determines the pH of the solution to be

    asked by ashdawg on April 4, 2013
  73. chemistry

    If a precipitation reaction occurs when a solution of one species is added to a solution of the other, enter the formulas and states of all products. Separate by comma. If there is no reaction, enter the formula and state of all ions in solution. magnesium

    asked by bubble on January 20, 2010
  74. Chemistry

    Suppose 50.0 mL of an aqueous solution containing an unknown monoprotic weak acid is titrated with 0.250 M KOH. The titration requires 31.52 mL of the potassium hydroxide solution to reach the equivalence point. What is the concentration (in molarity) of

    asked by Chill on March 5, 2012
  75. chemistry

    If a precipitation reaction occurs when a solution of one species is added to a solution of the other, enter the formulas and states of all products. Separate by comma. If there is no reaction, enter the formula and state of all ions in solution. aluminum

    asked by Amrita on November 23, 2010
  76. pre-calculus

    solve the following logarithmic equation. be sure to reject any value of x that is not in the domain of the original logarithmic expression. give the exact answer. then, use the calculator to obtain a decimal appromiation, correct to two decimal places,

    asked by ladybug on October 6, 2012
  77. Chemistry

    A 15.0mL solution of H2SO3 is neutralized by 12.0mL of a standardized 1.00M NaOH solution. What is the concentration of the H2SO3 solution? Please reply with the steps on how to do this question so I can learn. I can't find examples or anything related in

    asked by bri on June 14, 2012
  78. maths

    Starting with x0 = 0 (x0 has diagonal 0 that is smaller and towards the bottom) use the iteration formuala xn+1 = 4/ xn^2 +5 twice (for xn+1 the n+1 is smaller than x and diagonal towards the bottom also for xn^2 the n^2 is smaller than the x and diagonal

    asked by supersupersuper on January 3, 2017
  79. biology/science

    i am doing a paper and i need to find the pros to embryonic stem cells I only have one reason which is medical but I need 4 more. Can anyone give me general ideas of pro arguments

    asked by john on March 14, 2008
  80. Science

    I need help on this fill in the blank science question for my study guide on Cellular Respiration "More active cells need more ______ to release more _______"

    asked by Gene on December 11, 2016
  81. SCIENce

    IN both plant and animal cells, the cell membrane 1. Produces enzymes 2. controls reproduction 3.is composed of sugars 4. regulates diffuion

    asked by ANNY on October 27, 2011
  82. chemistry

    For all three of the cubic lattices (unit cells), all of the ? and all of the ? are the same size. A wild guess. edges. radii?? Check it out thoroughly. Perhaps you have a list of words from which to choose.

    asked by dory on February 1, 2007
  83. Biology

    A baby born without the ability to produce immune system cells may survive for several months, even when exposed to potentially deadly diseases. How?

    asked by Bee on November 30, 2010
  84. Physics

    How does the cochlea sense sound? •Snail shaped tube lined with receptor cells which transmits signals to the brain. Correct?

    asked by randomchik on October 11, 2012
  85. Pych

    ------------- plays the most important role in making sure neurons can function effectively? A. The cell body B. dendrites C. Synapses D. Glia cells

    asked by Mike/? on August 16, 2013
  86. biology

    A group of specialized cells that transport fluids and nutrients is called a. a multicellular autotroph b. a methanogen c. an aggregation d. vascular tissue A?

    asked by Pamela on May 7, 2010
  87. Science

    We are stumped trying to create a concept map with community, population, ecosystems, organs, tissues, cells, nucleus, golgi complex, etc. Can you help?

    asked by Tony on November 20, 2008
  88. Microbiology

    The presence of (cocci/diplococci/coccobacilli/streptococci) in the CSF is consistent with infection with Listeria monocytogenes. (Describe the appearance of the cells.)

    asked by Shannon on April 28, 2016
  89. Biology

    Explain what happens at the first checkpoint If GO is prevented from occuring. Answer: these cells can be called back from the G0 phase to the cell cycle by external cues

    asked by HELP! on December 14, 2014
  90. math-ms sue please

    Ms Sue thank you for the help with my other word problem can you check this one for me? Write a word problem and find the solution to the equation. 1/2-2/3 THe answer is -1/6 and the word problem I created is: Janet put 6 suckers on a table. 3 suckers were

    asked by m on October 27, 2010
  91. math

    Leroi and Sylvia both put $100 in a savings account. Leroi decides he will put in an additional $10 each week. Sylvia decides to put in additional 10% of the amount in the account each week. 1)Who has more money after the first additional deposit? Explain.

    asked by Tim on October 20, 2015
  92. religious education

    i need to design and create a tourist poster for palestines in jesus`s time. im having problems with it because i have googled it and it shows a poster with a black tree on the left hand side and buildings in the middle of the poster. im a bit confused i

    asked by jasmine on December 30, 2008
  93. chem

    Consider the reaction that occurs on mixing 50.0 mL of 0.560 MNaHCO3 and 50.0 mL of 0.400 M NaOH at25oC. (a) Write a balanced net ionic equation for thereaction. (b) What is the pH of the resulting solution? (c) How much heat (in joules) is liberated by

    asked by pal on March 29, 2011
  94. Chem 1

    The forensic technician at a crime scene has just prepared a luminol stock solution by adding 15.0g of luminol into a total volume of 75.0 \rm mL of \rm H_2O. What is the molarity of the stock solution of luminol? 1.13M Before investigating the scene, the

    asked by Chris on March 13, 2013
  95. English

    1. Would you put me through to Mr. Brown? 2. Would you connect me to Mr. Brown. (In a telephone conversation, are both the same? Which one is commonly used?) 3. I'll put you through to the Service Department. 4. I'll put you through to the Service

    asked by rfvv on September 2, 2017
  96. Inequality test

    Posted by Jason Roberj1 on Thursday, December 8, 2016 at 11:30am. 1. Which number is a solution of the inequality G > 6.4 A 7 B 6 C 6.4 D -7 2. Which number is a solution of the inequality y+2>8 A -5 B -6 C 6 D 7 3. which number is A solution of the

    asked by Jason Roberj1 on December 8, 2016
  97. Anatomy & Physiology II

    I've included answers as well. Thanks in advance. 1. Chemical substances secreted by cells into the extracellular fluids that regulate the metabolic function of other cells in the body are called: a. enzymes b. antibodies c. proteins d. hormones I chose D

    asked by Ana on February 25, 2010
  98. Anatomy & Physiology II

    I've included answers as well. Thanks in advance. 1. Chemical substances secreted by cells into the extracellular fluids that regulate the metabolic function of other cells in the body are called: a. enzymes b. antibodies c. proteins d. hormones I chose D

    asked by Ana on February 24, 2010
  99. chemistry

    1) What 2 resources are used up as a candle burns? 2) What has happened to the atoms in these resources? 3) Is it possible to recover these 2 resources after theyve been used?

    asked by auburn on May 17, 2012
  100. math

    A 25% vinegar solution is combined with triple the amount of a 45% vinegar solution and a 5% vinegar solution resulting in 20 milliliters of a 30% vinegar solution. Write an equation that models this situation and explain what each part represents in the

    asked by Bob on November 26, 2018