# Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

91,718 questions, page 184
1. ## ethics

A coworker calls you at 9 a.m. at work and asks for a favor. He is having trouble this morning and will be an hour late for work. He explains that he has already been late for work twice this month and that a third time will cost him four hours of pay. He

asked by Gurv on November 9, 2006
2. ## math

14.what value of n will result in a mean if 31 15.what value of n will result in a median of 23 15.what value of a will result in a range of 84 14,46,19,10,39,22,24,77,n Refresh your memory about the defnition of median, mode and range of a set of numbers.

asked by alice on March 4, 2007
3. ## Chemistry

In this experiment absorption spectroscopy is conducted to detect Cr(VI)in aqueous solutions and with it the concentration of Cr(VI). How would each of the following affect the Cr(VI) concentration determined in this experiment? Explain the answer. 1. A

asked by Sandy on February 23, 2014
4. ## biology help plz?????????????????

Complete the following paragraph relating to the enzyme, β–galactosidase. This enzyme hydrolyses the disaccharide lactose to constituent monosaccharides, galactose and glucose. Drag and drop the appropriate words into the correct space. For white spaces

asked by centya on February 28, 2013
5. ## chemistry- absorbance & transmittance

An unknown was prepared with the concentration of 0.000120 M. A Beer's Law plot was prepared using the absorbance values from standard solutions of ASA and a line drawn through all the points passed through the origin with a slope of 1750.0 M–1. The

asked by christine on February 16, 2007
6. ## College Chemistry

1) The concentration of the aluminum ion in a test solution is 0.10M. Using the Ksp for aluminum hydroxide (3. x 10^-34), calculate the concentration of hydroxide needed to precipitate aluminum hydroxide. From the concentration of the hydroxide, calculate

asked by Zach on April 1, 2010

Marianne buys 16 bags of potting soil that comes in 5/8 -pound bags. A. How many pounds of potting does Marianne buy? 10 B. If Marianne’s father calls and says he needs 13 pounds of potting soil, will 4 more bags be enough to cover the extra soil needed?

asked by Mark on September 16, 2014
8. ## managemnet

what elements should be present in a appraisal system? Can this be like pay for performance type thing or am i going in the wrong direction. Since this is not my area of expertise, I searched Google under the key words "business appraisal system" to get

asked by lois on July 23, 2007
9. ## Physics

Please help me with these choose the best answers since I'm not sure of my answers. A current element produces a magnetic field in the region surrounding it. at any point in space, the magnetic field produced by this current element points in a direction

asked by Jessica on October 23, 2011
10. ## Physics

Please help me with these choose the best answers since I'm not sure of my answers. A current element produces a magnetic field in the region surrounding it. at any point in space, the magnetic field produced by this current element points in a direction

asked by Jessica on October 23, 2011

You have been reading about Maddy Computer Company (MCC), which currently retains 90 percent of its earning ($5 a share this year). It earns an ROE of almost 30 percent. Assuming a required rate of return of 14 percent, how much would you pay for MCC on asked by dominicano174 on November 20, 2008 12. ## marketing The company you work for is considering changing its applicant testing process. Your supervisor has asked you to research testing methods and make your recommendation. This proposal will be submitted to the Vice President for review and consideration. For asked by Anonymous on March 30, 2010 13. ## math 117 algebra The cost i dollarsof manufacturing w wing nuts is given by the expression 0.07w + 13.3. Find the cost when 375 wing nuts are made. What is the average cost to manufacture one wing nut? Put in 375 for w, and compute the cost. Average cost= costabove/w I'm asked by Diana on June 22, 2007 14. ## chemistry Zinc is to be used as an internal standard for the polarographic analysis of thallium. A standard solution containing twice the concentration of zinc as thallium has diffusion currents of 1.89 microAmps for thallium and 3.5 microAmps for zinc. A 10.0g asked by Adeola on July 10, 2015 15. ## Physics A 2000 kg car pushes a 3000 kg truck that has a dead battery. The ground pushes forward on the car with a force of 6000 N. What is the magnitude of the force that the truck exerts on the car? Ignore any friction forces. My work/attempts: I've drawn a for asked by Ashley on July 3, 2015 16. ## Physics An ideal spring with a stiffness of 329 N/m is attached to a wall, and its other end is attached to a block that has a mass of 15.0 kg. The spring/block system is then stretched away from the spring's relaxed position until 57.0 J of mechanical energy is asked by John on December 4, 2009 17. ## BC Calculus Solve this problem algebraically, using your knowledge of derivatives. Do not solve by graphing. If 800 feet of fencing is used to enclose a rectangular plot of land that borders a river, what is the maximum area that can be enclosed? asked by Margaret on April 16, 2018 18. ## math I am getting difficulties by doin this homework.plzzzz can u hel pme;Solve this simultaneous equation;1/3(x+2)-1/4(y-1)=1,5X=4Y(B)SOLVE TO 2 DECIMAL PLACES'x-15/x=12. The second number am not sure of my calcalations;The point (x,y)is transformed by the asked by nellyna on August 23, 2007 19. ## Chemistry-Pressure The wastewater solution from a factory containing high levels of salts needs to be diluted before it can be released into the environment. Therefore, two containers of waste solution are separated by a semipermeable membrane and pressure is applied to one asked by Jonah on April 28, 2013 20. ## Fluid Mechanics I am trying to work a problem to find flowrate, and a time to reach equilibrium. It sets up like this: I have a tank with a volume of 400 cubic feet full of compressed air at 50psi. The tank has an 8" schedule 40 carbon steel pipe coming off of it with a asked by Grant on March 1, 2016 21. ## science How many grams of Aluminum will react w/ 1 liter of a 1M solution of Fe^3+? wat steps do i need to take to solve this? Al + Fe+3==> Fe+2 + Al+3. Here are the steps for solving a stoichiometry problem. Step 1. Write the balanced equation. You have the asked by michelle on January 3, 2007 22. ## math The high temperature in a city one day was 2,6 degrees Celsius. The low temperature was -2.8 degrees celsius. What was the temperature range in the city that day? show your work. asked by syram on March 6, 2013 23. ## chem 1.Pippete 20ml of 0.1M acetic acid and 20ml of 0.1M NaOH into a 100ml beaker (Remember that the final volume of this solution is the sum of the volumes of the acetic acid and NaOH solutions that have been mixed) 2. Pippete 20ml of 0.1 acetic acid into asked by tomi on April 26, 2009 24. ## physics A mass of 0.116 kg hangs from a vertical spring in the lab room. You pull down on the mass and throw it vertically downward. The speed of the mass just after leaving your hand is 5.60 m/s. (a) While the mass moves downward a distance of 0.04 m, how much asked by Chris on April 17, 2011 25. ## math a. the line y=7x cuts the circle x^2+y^2=50 at A and B. find the coordinates of A and B. b. show that C(5;5) lies on the circle. c. show that ACB angle C=90degrees. what can you deduce about AB? d.find the equation of the tangent to the circle at C asked by Anonymous on May 5, 2015 26. ## Small Business what are some window display ideas for an auto detailing business? How about before and after pictures? The before pictures would show dirty, littered cars. The after pictures would show clean, shiny cars. asked by Bryan on April 2, 2007 27. ## CHEMISTRY A STUDENT STUDYING THE FE+3- HSCN equilibrium put into a test tube 10.00ml of 2.00 x 10-3 M Fe(NO3)3 with 10.0 mL of 2.00 x 10-3 M HSCN.THE H+ in the resulting solution was manteined at 0.500.By spectrophotometric analysis of the equilibrium solution, the asked by da on September 18, 2011 28. ## Chemistry For this question, I know how to answer the first three questions, but not the rest. 12ml 0.025 M of benzoic acid (Ka=6.3x10-5)is titrated with 0.050 M NaOH. How many moles of benzoic acid are there? I got 0.0003 What volume of NaOH is required?(L) I got asked by Sara on June 23, 2015 29. ## Chemistry Using Volumetric Glassware to Measure, Dilute,and Titrate Acid Solution 1)For each of the following procedural errors, indicate whether the calculated molarity of the HCl solution would be higher or lower than the actual molarity. Briefly explain. a)The asked by Anonymous on April 1, 2011 30. ## finance Sunshine Corporation is considering several long-term investments. Management wants to accept the two best projects, given the following data: Project A B C D E Present value of net cash inflows . . . . . . . .$24,000 $44,000$15,000 $30,000$50,000

asked by neil on September 25, 2007
31. ## math

1) John usually gets to work by driving 29 miles down Greenwich Street, which goes from his house to his office in a straight line. One week, Greenwich Street is closed due to construction, so John gets to work by driving 13 miles wests on 57th street, and

asked by aline on February 16, 2018
32. ## math investments

I am unsure how to figure out this question please explian Mr Jones bought 1,8000 shares of Hampstead Mutual Fund at an offer price of $3 per share He later sold the shares at a net asset value of$4.60 per share During this time Mr Smith owned the shares,

asked by jameasen on January 10, 2008
33. ## Chemistry

What preperation produces a 2.0 Mole solution of C6H12O6? a) 90.0 grams of C6H12O6 dissolved in 500.0 mL of solution b) 180.0 grams of C6H12O6 dissolved in 1000mL of solution c) 90 Grams of C6H12O6 dissolved in 1000mL of solution D) 180.0 Grams of C6H12O6

asked by D on December 19, 2012
34. ## HISTORY 2

6. which of the following does NOT describe women's work in early Georgia A. Planting and tending a home garden B. Working at the local hospital C. Making clothes for the family D. Taking care of the children** 7. which of the following groups of new

asked by HELP ME 911 MS. SUE on September 25, 2014
35. ## Math

Calculate the amount of fluorescein (MW 332.31) you will need to make 10 mL of 15 mM solution in ethanol (EtOH). My answer:0.05 g 2.Using Equation C1V1=C2V2 calculate the volume of stock solution (15 mM) you need to make 1 mL of each working solution

asked by Vivian on January 14, 2017
36. ## science

Which type of muscle is resposible for moving fluids through the urinary system Since this is not my area of expertise, I searched Google under the key words "urinary system muscle" to get these possible sources:

asked by suzie on May 19, 2007
37. ## physics

need to know mass and acceleration of a 30.5 bloch connected to an empty 1.00kg bucket by cord running over a frictionless pulley coefficient of static friction between table and block is 0.405 and coeff. of kinetic frict. between the table and the block

asked by sara on March 16, 2011
38. ## Math

A 30% solution of fertilizer is to be mixed with a 60% solution of fertilizer in order to get 150 gallons of 50% solution. How many gallons of the 30% and the 60% solutions should be mixed. I really need help.

asked by Candice Watt on February 1, 2011
39. ## chemistry!!

The pH of an aqueous solution is 3.25. a. Calulate the concetration of the hydronium ions in the solution. b. Calulate the concetration of the hydroxide ions in the solution.

asked by Mary on November 26, 2011
40. ## chemistry

Transfer the tablet to a clean 125-mL Erlenmeyer flask. Add 10-mL of 1M NaOH and heat the mixture to a gentle boil. Once the solution has cooled to room temperature, transfer it to a 100-mL vol. flask. Using the diluted solution from the 100-mL volumetric

asked by eng on January 31, 2010
41. ## chemistry

there's a 5.44 g sample of NH4NO3 and 150 g sample of water. So they ask for the change in enthalpy in kJ/mol. They give the temperature change from 16.2 degrees C to 18.6 degrees C. They also provide the specific heat capacity of the entire solution

asked by anna on October 20, 2009
42. ## chemistry

there's a 5.44 g sample of NH4NO3 and 150 g sample of water. So they ask for the change in enthalpy in kJ/mol. They give the temperature change from 16.2 degrees C to 18.6 degrees C. They also provide the specific heat capacity of the entire solution

asked by anna on October 21, 2009
43. ## Math

4. Landon is standing in a hole that is 6.5 ft deep. He throws a rock, and it goes up into the air, out of the hole, and then lands on the ground above. The path of the rock can be modeled by the equation y = 0.005x² + 0.45x – 6.5, where x is the

asked by Jim on March 11, 2013
44. ## Algebra

Substitute -3 for a and 8 for b in the given equations. Tell whether each statement is True or False after substituting for a and b. A. The equation 5x-7(x-1)= ax+b has exactly one solution. T or F B. The equation 3(x-5)-7=ax+b has no solution. T or F C.

asked by Emma on July 16, 2019
45. ## Algebra!

Two cars leave town going opposite directions. One car is traveling 55 mph, and the other is traveling 65 mph How long will it take before they are 180 miles apart? Hint: The time for both cars is the same and can be represented by "t." The total distance

asked by Margie!! on November 14, 2006
46. ## chemistry

n order to determine the concentration of bivalent nickel in environmental samples we can use the complexometric titration. A 100 mL sample containing Ni2 + was treated with 50 mL of 0.02 mol / L EDTA solution complexing all Ni2 + solution and leaving an

asked by wallace on August 30, 2018
47. ## chemistry

To what volume should you dilute 131 mL of an 8.20 M CuCl2 solution so that 49.0 mL of the diluted solution contains 4.53g CuCl2 ? Chemistry...Help!! - Dr Russ, Wednesday, December 8, 2010 at 4:43am Molar mass of CuCl2 is 134.5 g mol^-1 so solution needs

asked by Lisa, Help needed! on December 8, 2010
48. ## Math

There are five Voting Districts in the City; District A with 877 constituents, District B with 1062 constituents, District C with 1364 constituents, District D with 1518 constituents, and District E with 1933 constituents. There are 14 available on the

asked by Asia on February 1, 2017
49. ## Chemistry

How much of a 500 ml bottle of 1.00 molar KCI solution should be diluted with deionized water to give 200.0 ml of a 0.100 molar solution

asked by Jane on February 14, 2011
50. ## chemistry

a 35.0ml sample of 37% hcl solution has a density of 1.18g/ml. the sample is diluted to a volume of 0.125L. what is the molarity of the final solution ?

asked by john on May 5, 2013
51. ## Chemistry

If 17.0 g of sodium chloride are dissolved in water to make 0.5 L of solution, then what is the final concentration of the solution? Answer 0.6 mol L I don't get this. I know that 1 mol / 22.4 L

asked by Amy~ on August 29, 2010
52. ## chemistry

what is the concentration of the hydroxide ion in a solution if .12 mol of strontium hydroxide are dissolved in water and the final solution volume is 500. mL?

asked by samantha on December 8, 2012
53. ## Chemistry

2.562 g of H2C2O42H2O (s) was obtained and dissolved in enough DI water to form 150.0 mL of solution. What is the concentration of the resulting of H2C2O4 (aq) solution?

asked by John Blake on October 30, 2014
54. ## physical science

120ml of a solution whose concentration is 30g/ml was diluted with distilled water by raising its volume to 160cm3. Calculate the concentration of the new solution.

asked by grace on February 25, 2012
55. ## Chemistry

A water solution containing an unknown quantity of an unknown nonelectrolyte solute has a freezing point of -0.21 Celsius. What is the molality of the solution? Kf=-1.86C/m

asked by Anonymous on May 12, 2011
56. ## Chemistry

What is the pH of the resulting solution when 25.0mL of 0.100 HNO3(aq)are reacted with 20.0 mL of 0.175M NaOH(aq)? Is the resulting solution acidic or basic in nature?

asked by Kat on January 22, 2015
57. ## Chemistry

NaHCO3 + HCl -> NaCl+H2O+CO2 What is the normality of a sodium bi carbonate solution containing 5.08g NaHCO3 in 150 ml solution?

asked by Janice on November 12, 2009
58. ## chemistry

A sample of solid ammonia chloride NH4Cl, is dissolved in water...the solution found is acidic...explain why the solution is acidic?

asked by cedrick on June 5, 2017
59. ## chemistry-science

A 500 ml buffer solution contains .2M Acetic acid and .3M sodium acetate. Find the pH of the buffer solution after adding 20 ml of 1M NaOH, what is the pH? (pka = 4.74)

asked by jess on April 30, 2010
60. ## chemistry

A) If you make up a solution of 50 mL of 0.1 M TRIS in the acid form, what will be the pH? (pka of TRIS: 8.3, molecular wt: 121.1 g) B) if you add 2mL of 1 M NaOH to the solution, what will be the pH? Thank you.

asked by matt on February 2, 2008
61. ## College General Chemistry

How would you prepare each of the following solutions? a. 100mL of a 155ppm solution of urea, CH4N2O, in water. b.100mL of an aquaneous solution whose K+ concentration is 0.075M

asked by DONDON on January 31, 2011
62. ## Chemistry

Hard ball candy is prepared from boiling an aqueous sugar solution that has a boiling point of 260.°F. What is the molality of this solution?

63. ## Chemistry

Calculate the pH of the resulting solution if 50 cm3 of 0.045mol dm-3 solution of C5H5N is mixed with 100 cm3 of 0.035 mol dm-3 of C5H5NH+

asked by Morgan on April 29, 2015
64. ## AP Chem

It takes 58 mL of 0.124 M KOH to neutralize 34.5 mL of H2SO4 solution. What is the concentration of the H2SO4 solution? Answer in unites of moles/liter.

asked by Chandler on September 11, 2011
65. ## Chemistry

A 327- ML sample of unknown HCI solution reacts completely with Na2CO3 to form 20.1 g CO2 What was the concentration of the HCI solution?

asked by Cathy Miller on November 30, 2010
66. ## CHEMISTRY- boiling point

0.1m aqueous solution of HCl and 0.1m aqueous solution of C6H12O6. calculate the boiling point of each i know the eq. dTb=Kbm but i have no temperatures. this is the question

asked by lulu78 on October 15, 2010
67. ## Chemistry

Calculate the pH of the resulting solution if 50 cm3 of 0.045mol dm-3 solution of C5H5N is mixed with 100 cm3 of 0.035 mol dm-3 of C5H5NH+

asked by Morgan on April 29, 2015
68. ## chemistry

It takes 62 mL of 0.124 M KOH to neutralize 46.7 mL of H2SO4 solution. What is the concentration of the H2SO4 solution? Answer in units of moles/liter

asked by cheri on September 13, 2012
69. ## Chem

What is different about neutralization reactions that produce a neutral solution at the equivalence point and those that produce acidic or basic solution? I think it is the concentration of the reactants?

asked by Anonymous on May 20, 2013
70. ## chemistry

It takes 62 mL of 0.124 M KOH to neutralize 46.7 mL of H2SO4 solution. What is the concentration of the H2SO4 solution? Answer in units of moles/liter

asked by cheri on September 16, 2012
71. ## chemistry

A 337-\rm mL sample of unknown \rm HCl solution reacts completely with \rm Na_2CO_3 to form 17.1g \rm CO_2. What was the concentration of the \rm HCl solution?

asked by Lauren on April 7, 2013
72. ## Science

When we evaporate a salt solution salt crystals are left in the beaker or utensil but does the same thing happen in case of sugar solution?

asked by Diana on June 11, 2016
73. ## chemistry

A 1.10- sample contains only glucose and sucrose . When the sample is dissolved in water to a total solution volume of 25.0 , the osmotic pressure of the solution is 3.78 at 298 .

asked by bf on January 24, 2010
74. ## Solution Stoichiometry

If 75.0 mL of an AgNO3 solution reacts with enough Cu to produce .25g Ag by single displacement, what is the molarity of the initial AgNO3 solution if Cu(NO3)2 is the other product?

asked by Anonymous on March 29, 2009
75. ## chemistry

a 35.0ml sample of 37 hcl solution has a density of 1.18g/ml. the sample is diluted to a volume of 0.125L. what is the molarity of the final solution ?

asked by john on May 5, 2013
76. ## Chemistry

An aqueous solution of H2SO4 is 60.0 % H2SO4 by mass. The density of the solution is 0.968 g/mL . I need to find the Molality, mole fraction, and Molarity.

asked by Sara on December 3, 2010
77. ## science

A solution is prepared by mixing 100.0 mL of 0.0500 M AgNO3 with 75.0 mL of 0.0500 M CaCl2. What is the equilibrium concentration of Ag+ in solution? Ksp for AgCl is 1.6 x 10^-10

asked by luna on July 26, 2013
78. ## chemistry

When making pepsin in acetic acid, can I apply heat to the solution? What is the appearance of the pepsin solution should be? I'm not sure if it has to be really transparent, I know that it looks kinda yellow.

asked by blast on July 1, 2011
79. ## chemistry

How many grams of NH4Cl must be added to 0.490 L of 1.70 M NH3 solution to yield a buffer solution with a pH of 9.40? Assume no volume change. Kb for NH3 = 1.8 10-5.

asked by kelly on October 26, 2011
80. ## chemist

What is the concentration of the hydroxide ion in a solution if 0.12 mol of strontium hydroxide are dissolved in water and the final solution volume is 500. mL?

asked by Linnessa on April 28, 2013
81. ## Chem

A household bleach solution contains 5.25% (by mass) NaClO. How many moles of NaClO are needed to make 1000L of the solution? (density = 1.07g/mL)

asked by Staci on March 26, 2010
82. ## Chemistry

A current of 96.5 amperes is passed for 18 minutes between nickel electrodes in 500 ml solution of 0.2M nickel nitrate.the molarity of solution after electrolysis is

asked by Jyoshna on July 13, 2017
83. ## chemistry

When making pepsin in acetic acid, can I apply heat to the solution? What is the appearance of the pepsin solution should be? I'm not sure if it has to be really transparent, I know that it looks kinda yellow.

asked by blast on July 1, 2011
84. ## Analytical chem

SPECTROPHOTOMETRIC ANALYSIS OF STEEL I have a known molarity of KMnO4 solution. It was diluted by a factor of 20. Its absorbance is now 1.18. The length of the path is 1 cm.What is the molarity of the new solution.

asked by Hannah on July 23, 2013
85. ## Chemistry

How many milliliters of a 0.20 M of glucose (C6H12O6) solution are needed to provide a total of 25.0 g. of glucose? Molarity(M)= Moles of Solute/Liters of Solution

asked by Melia on November 11, 2012
86. ## Chemistry II

A solution contains the following: NH3(aq) + H2O(l) NH4+(aq) + OH-(aq) Adding NH4Cl to this solution shifts the equilibrium of the given reaction to the left. What kind of reaction is this?

asked by Mandy on October 28, 2009
87. ## physical science

A solution that contains a large amount of salt and a small amount of water is said to be a __________ solution. A. dilute B. unsaturated C. concentrated D. saturated

asked by Unmei on June 7, 2014
88. ## AP Chemistry

A student titrates 25.0 mL of a 0.100 M solution of acetic acid with a 0.100 solution of sodium hydroxide. Calculate the pH at the equivalence point.

asked by Anonymous on February 17, 2015
89. ## chemistry

Describe in detail, the steps a student needs to carry out to accurately obtain a 500 ml solution of .100 M HNO3 from a solution of 1M HNO3

asked by Angelica on April 13, 2012
90. ## AP Chem

Determine the amount of a precipitate produced when 10mL of a 0.1M silver nitrate solution is mixed with 10mL of a 0.1M calcium chloride solution.

asked by David W. on November 21, 2016
91. ## chemistry

How many grams of dry NH4Cl need to be added to 2.00L of a 0.100M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.86? Kb for ammonia is 1.8×10−5.

asked by Jennifer on April 22, 2014
92. ## Chemistry

A solution is prepared by diluting 65.0 mL of 0.175 M methylamine, CH3NH2, to a total volume of 225 mL. Calculate the pH of the diluted solution. Kb (CH3NH2) = 4.40 x 10-4

asked by Mallory on June 26, 2011
93. ## chemistry

In a solution of Fe²+ and Aluminum immersed in a solution of Al³+ knowing that aluminum is more reactive than iron, what metal form the anode?

asked by Nora on October 9, 2017
94. ## analytical chemistry

Determine the concentration of iron in an aqueous solution containing 0.2810 grams of Fe(NH4)2(SO4)2 per liter of solution. Express the concentration in mg/dl.

asked by jenine on June 15, 2014
95. ## Chemistry

A saturated solution of calcium chromate (CaCrO4) freezes at -0.10 C. What is Ksp for CaCrO4? Assume complete dissociation. The density of the solution is 1.0 g/mL.

asked by Olivia on November 12, 2013
96. ## chemistry

A buffer solution was prepared by mixing 442 mL of 0.181 M NaOCl and 139 mL of 0.421 M HOCl. Calculate the pH of the solution given that Ka (HOCl) is 3.2 x 10-8.

asked by cathy on March 18, 2012
97. ## Chemistry

What is the concentration of an acetic acid solution if 11.2 mL of 1.002 Molarity sodium hydroxide solution is needed to completely neutralize 5.1 mL of the acid?

asked by Bruce on March 23, 2011
98. ## Chemistry

Suppose we had mixed 52.37 mL of 1.00 M HI solution with 25.42 mL of 1.00 M KOH solution, and measured a heat of reaction of -1.52 kJ. What is ΔH for this reaction, in kJ? Assume that all solutions have the same density as water (1.00 g/mL).

asked by Will on December 11, 2015
99. ## Chemistry

the hydronium ion concentration of a 0.050 M solution of a weak acid is 5.9 X 10^-3 M. the acid-dissociation constant is 1.37 X 10^-4 at 25 celsius. what is the pH of this solution? A. 0.077 B. 1.30 C. 2.23 D. 3.86 E. 5.13

asked by Chemistry on March 18, 2013
100. ## Chemistry

78 mL of a 1.60M solution is diluted to a volume of a 238mL. A 119-mL portion of that solution is diluted using 133 mL of water. What is the final concentration

asked by Sam on April 13, 2012