# 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 211
1. ## Chemistry

If 50.0mL of 1.60M HCl was added to 50.0mL of 1.80M NaOH, calculate the molarity of the resulting NaCl solution. (Hint: resulting solution has a volume of 100 mL)

asked by Jen on April 1, 2010
2. ## Biology

You have a stock solution of 100mg/100ml methylene blue and you need 6.0 ml of final solution at 2mg/100ml. Design a serial dilution using volumes between 0.1 and 10 ml. Final volume must be 6ml.

asked by Anonymous on January 19, 2015
3. ## Chemistry

You prepare a buffer solution by dissolving 2.00 g each of benzoic acid, C6H5COOH and sodium benzoate, NaC6H5COO in 750.0 mL of water. What is the pH of this buffer? Assume that the solution's volume is 750.0 mL.

asked by Dron on April 24, 2016
4. ## Chemistry: Acids/Bases

When a 100 mM aq solution of sodium acetate was prepared in the lab it had a pH of 8.9. Calculate the amount of acetic acid (in g) to be added to 0.5 L of this sodium acetate solution in order to bring its pH to the target value of 5.00.

asked by Tim on April 11, 2015
5. ## Chemistry

An aqueous solution of HCl has a high electrical conductivity when compared to the compound in hexane, whilst the conductivity of a solution of the compound in diethyl ether has an intermediate value. Explain.

asked by Matt on January 8, 2013
6. ## Chemistry

The ΔH per mole of CaCl2 is -81.0 kJ. Calculate the final temperature of an aqueous solution if 30 g of CaCl2 are added to 100 g of water at 23oC. Assume that the specific heat of the solution is the same as that of water

asked by Felicia on October 7, 2010
7. ## Algebra

On Jan 1, 2010, Chessville has a population of 50,000 people. Chessville then enters a period of population growth. Its population increases 7% each year. On the same day, Checkersville has a population of 70,000 people. Checkersville starts to experience

asked by Anonymous on February 5, 2014
8. ## Physics

The modern boxing glove was introduced in 1743. Before then, gloves weren’t used. Let's assume that the average boxer's arm has a mass of 7 kilograms and reaches 10 m/s before hitting an opponent's face. If upon Collision the face was compressed about

asked by Anonymous on December 1, 2016
9. ## Chemistry

2HCr4- + 3HS03- + 5H+ -> 2Cr3+ + 3SO4^2- + 5H20. At t=0, 0.0249 mols of HCr04- are loaded in to 250ml of solution. After 1/10 of an hour, 0.00852 mol of HCrO4- remain. Assuming the solution volume remained the same, how many grams of water were formed per

asked by Tri on September 23, 2008
10. ## Accounting

It's approaching year-end, and your president has asked you, the management accountant, to visit his office for a heart-to-heart talk. After he closes the door, he tells you that profits for the year will end up below plan and that he's disappointed. He

asked by Anonymous on July 19, 2010
11. ## SCI 245 Physcial Geology

Choose a state or one of the following regions: Interior Plan, Appalachian Highlands, Rocky Mountain System, Pacific Mountian System, Atlantic Plan. Create a 12 to 15 PowerPoint presentation for your selected state or region. Address the following in your

asked by Spankie on May 17, 2008
12. ## English expression

1. Make groups of two. 2. Work in pairs. 3. Work in twos. 4. Make teams of two. ---------------- Are all the same? Can we use all?

asked by John on March 19, 2008
13. ## MATH

Blake earned \$199.20 for 24 hours of work. How much would he be paid for 15 hours of work?

asked by JD JOHNSON on June 24, 2014
14. ## Science-y Math-y Stuff

A machine with 80% efficiency does 4,000 J of work. Using the machine how much work did you do? NEED HELP! PLZ REPLY SOON

asked by NYB on December 13, 2016
15. ## Math

Jared can work 54 math problems in 1 hour. How many problems can he work in 10minutes?

asked by Lola on June 20, 2012
16. ## 4th grade math

Analee earjs \$45 for every 5 hours of work. how much money can she earn for H hours of work

asked by mythreyee on November 12, 2013
17. ## Algebra

On Jan 1, 2010, Chessville has a population of 50,000 people. Chessville then enters a period of population growth. Its population increases 7% each year. On the same day, Checkersville has a population of 70,000 people. Checkersville starts to experience

asked by Anonymous on February 5, 2014
18. ## Alegebra I

I need help please!!! On January 1, 2010, Chessville has a population of 50,000 people. Chessville then enters a period of population growth. Its population increases 7% each year. On the same day, Checkersville had a population of 70,000 people.

asked by Amber on February 3, 2013
19. ## computers

Please note that we don't do students' homework for them. Our tutors try to give you the information to help you complete your assignment on your own. If there's not a tutor with this specialty online right now, be sure to go back into your textbook or

asked by Writeacher on May 28, 2007
20. ## Health care communcation

Compose a 200 word response Employees from the billing department are not receving the accurate codes and information needed for data entry, slowing production and payments for the doctor as head of the billing department you have been delegate to lead a

asked by Julissa on November 29, 2008
21. ## Physics

The particles as shown in the figure below are connected by a very light rod. They rotate about the y axis at 1.9 rad/s. a. Find the speed of each particle, and use it to calculate the kinetic energy of this system directly from 1/2 mivi2. speed of m1 = 1

asked by MUHAMMAD JUNAID on April 9, 2019
22. ## Help!Math...Again!!!PLease Help!

Two cars leave town going in the same direction. One travels 55 mph and the other travels 65 mph How long will it take before they are 180 miles apart? Hint: We do know that one car is 180 miles ahead of the other, so the slow car's distance can be

asked by Jessica on November 15, 2006
23. ## Materials Science and Engineering

We know from literature that a certain material “A” exhibits an electrical conductivity of σ=100 S/cm at room temperature. However, we would like to confirm this value by performing electrical conductivity measurements in our labs. To perform these

asked by wazowski on March 12, 2018
24. ## math

This question has a few parts to it. I tried but not sure if they are correct. A boy standing on top of a building in Albany throws a water balloon up vertically. The height (h) in feet, of the water is given by the equation h(t)=-16t^2+64t +192. where the

asked by sara on October 21, 2018
25. ## P-Chem

A 0.85-g sample is dissolved in 0.150 kg of bromobenzene. Determine the molar mass of the solute if the solution boils at 429.0 K at 1 atm pressure. The normal boiling point of bromobenzene is 428.1 K and the ebullioscopic constant is 6.26 K kg mol-1. A

asked by Michelle on October 12, 2006
26. ## physics

A 50 kg boy picks up a 11 kg stereo and raises it 0.75 m from the floor to a tabletop. How much work did he do on the stereo? How much work did he do to raise his own center of mass 0.40 m in the process? I'm assuming you use W=mgy equation but do you

asked by Leah on October 9, 2010
27. ## physics/calc

A worker on scaffolding 75 ft above the ground needs to lift a 500 lb bucket of cement from the ground to point 30 ft above the ground by pulling on a opre weighing .5 lb/ft. how much work is required? I know to use the Work integral, but im not sure wat

asked by Jessica on March 31, 2008
28. ## 6th grade algebra

a) Kendric makes 4 out of every 5 baskets he throws. What is the probability he will make his next shot as a percentage? MULTIPLE CHOICE b) If Marcia walks 4 1/4 miles before work and 5 6/8 miles after work. How many miles did she walk for the day? A 9

asked by Taylor on December 27, 2009
29. ## calculus

given the following function find, a. zeros and the multiplicity of each b. number of turning points c. end behavior f(x)=(x-1)(x-5) a. x=1 and x=5--is this correct? b. number of turning points I had f(x)-0 BUT my teacher said this-- Note that the equation

asked by Jimmy-can someone please help on December 18, 2012
30. ## Inorganic Chemistry

I messed up on my titration: filled part of the burette with a supersaturated solution of KHTar(2.073g...MM=188.18amu) dissolved in 150mL diH2O, instead of the 0.051M NaOH solution. I know it wasn't more than a few mL, but I noticed a huge difference in

asked by Christina (PLZ HELP!!) on July 14, 2011
31. ## Dynamics

A super elevation of a railroad track is the number of inches that the outside rail is raised to prevent side thrust on the wheel of flanges of cars rounding the curve at rated speed. Determine the super elevation e for track having a gauge of 4 ft and 8.5

asked by 17 on July 14, 2018
32. ## algerbra

i did my question already but i was wondering if someone could double check my work. the question says to graph the following function on the grpah f(x)={|x|, -3 is equal to or less than x less than 2} {2x-8, x less than or equal to 2} i dont know if its

asked by Liz on May 20, 2017
33. ## Math

Help! How do I complete these magic squares! They're taking me FOREVER! In magic squares, certain numbers have to add up to a certain sum, and be the same sum diagonal,across,and vertical. (Sorry if I didn't explain well) Arrange the numbers

asked by math on August 25, 2010
34. ## Math, please help me.

This is the last question of my quiz, I need help with it. I need just one question answered. Question: The angles opposite the congruent sides of an isosceles triangle are congruent. Find the value of x in the triangle. Show all your work. The triangles'

asked by Lily on February 19, 2016
35. ## history during the lives of early people

I need help in how I can approach this assignment,so that I cover all the areas that are to be included and still write an interesting and quality paper, showing the ways of life during this time in history. The assignment reads like this:You are to write

asked by Andy on September 19, 2009
36. ## Introduction to Graphic Design

Hello! Thanks for checking my question out! ____ 6. If you come to a stumbling block and can’t think of any more ideas, what could you do? Select all that apply. (2 points) a) Expand on your favorite idea so far even if you don’t think it will work.

asked by Da Fash on October 11, 2017
37. ## Math

Practice Dividing by 7 For each dance style , the Step - Up Dance School offers the same number of classes each day . Use the table to solve each problem . (1 week=7 days) Show your work. Step-Up Dance School Dance Style. Number of Classes Each Week Ballet

asked by Nawaf on December 29, 2013
38. ## Chem hwk

How many grams of solute are required to make a 504 mL solution of copper (I) nitrate with a concentration of 1.3317 M? I go 238.6 g but my friend said I'm way off When 84.2730 grams of solute are used to make a 504 mL solution of copper (I) nitrate, what

asked by Tif on April 29, 2013
39. ## Physics

I was wondering if my answers are correct. 1. A 50kg person is taking a ride on an elevator travelling up at a steady speed of 2.5m/s. Find the time fo the elevator trip if the elevator does 4900 J of work on the person. My answer: First I used the formula

asked by Liz on February 3, 2014
40. ## English

revise the following sentence to use modifiers correctly, clearly and effectively. Original 1.The student cafeteria is operated by a college food service system chain. Revised. The chain of student cafeteria is operated by a college food service system

asked by Li on September 28, 2016
41. ## math concepts

Matthew sits at his desk unable to figure out the answer to a division problem. He reaches into his desk and pulls out a calculator. What is the correct response for Matthew's teacher to have? A. "Put that calculator away, you can't cheat on your work." B.

asked by lauren on February 23, 2015
42. ## Mathematics concepts

Matthew sits at his desk unable to figure out the answer to a division problem. He reaches into his desk and pulls out a calculator. What is the correct response for Matthew's teacher to have? A. "Put that calculator away, you can't cheat on your work." B.

asked by lauren on February 24, 2015
43. ## Math Physics Torque Equilibrium

A uniform meterstick pivoted at its center has a 100 g mass suspended at the 21.0 cm position. At what position should a 95.0 g mass be suspended to put the system in equilibrium? What mass would have to be suspended at the 80.0 cm position for the system

asked by Brandon on October 22, 2016
44. ## Algebra (Math)

Without graphing, name the ordered pair where the graphs of the two linear equations intersect. (Below is the system.) { x = 2 y = -3 Without graphing, name the ordered pair where the graphs of the two linear equationd intersect. (Below is the system.) { y

asked by Kylie on March 25, 2015
45. ## chemistry

A 15.0ml sample of NaCL solution has a mass of 15.78g.after the NaCL solution is evaporated to dryness, the dry salt residue has a mass of 3.26g. calculate the following concentrations for the %(m/m), % (m/v), molarity (M)

asked by jack on November 1, 2012
46. ## Chemistry

How would you prepare 500.0 of an aqueous solution of glycerol with a vapor pressure of 24.8mm Hg at 26 degree Celsius (vapor pressure of pure water=25.21mm Hg)? assume the density of the solution to be 1.00 g/mL.

asked by Kris on September 10, 2012
47. ## chemistry

what is the molality of a 0.068M solution of ethyl alcohol in water at 25 degrees celsius. (assume the density of the solution at such a low concentration is equal to that of water at 25degrees celsius, 0.997g/ml)

asked by belinda on February 2, 2011
48. ## chemistry

what volume (in L) of 0.150 M KCl solution is required to completely react with 0.150 L of a 0.175 M Pb(NO3)2 solution according to the following balanced chemical equation? 2KCl (aq) + Pb(NO3)2 (aq) --> PbCl2 (s) + 2 KNO3 (aq)

asked by samantha on June 21, 2010
49. ## chemistry

what is the molality of a 0.068M solution of ethyl alcohol in water at 25 degrees celsius. (assume the density of the solution at such a low concentration is equal to that of water at 25degrees celsius, 0.997g/ml)

asked by belinda on February 2, 2011
50. ## ap chem

A certain volume of a .50 M solution contains 4.5g of a certain salt. What mass of the salt is present in the same volume of a 2.5 M solution? Indicate the concentration of each ion/molecule: A mixture of 50.0 mL of .2M KClO3 and 25.0 mL of a .20M Na2SO4.

asked by lily on September 13, 2007
51. ## lab chem

If toluene (density 0.87) wre used to extract ethylene bromohydrin (density 2.41) from an aqueous solution, a. Could you be certain that the organic solution would form the upper layer? b. by what test could you identify the nonaqueous layer.

asked by Poole on September 23, 2008
52. ## Biochemistry

HELP!! Describe how to prepare 800 ml of a 0.100 M potassium acetate buffer, pH = 4.46 (n.b. pKacetic acid = 4.76). You have glacial acetic acid (17.6 M), a 1.000 M solution of KOH and a 1.000 M solution of HCl.

asked by Jerrica on December 18, 2011
53. ## MEC

When 25.0 mL of 1.00 M HCl (0.025 mol)is mixed with exactly 25.0 mL of NaOH (0.025 mol) in a calorimeter, the temperature of the solution increased from 25.00 °C to 27.30 °C. (a) Is the reaction exothermic or endothermic? (b) If the specific heat of the

asked by Jessica jean on December 9, 2015
54. ## chemistry

A 4.14 m solution of the solute methylene chloride dissolved in the solvent ethanol is available. Calculate the mass ( kg ) of the solution that must be taken to obtain 1487 g of methylene chloride. CH2Cl2-1327 (kg/m^3) C2H5OH-789.3 (kg/m^3)

asked by eng on January 28, 2010
55. ## ap chemistry

A solution is prepared in which a trace or small amount of Fe+2 is added to a much larger amount of solution in which the [OH]- is 1.0M*10^-2. some Fe(OH)2 precipitates. the value of Ksp for the salt is 8.0*10^-10. assuming that the hydroxide ion

asked by brian on October 19, 2010
56. ## Chemistry

A solution is prepared that has [NH3]=1.00M and [Cl-]=0.100M. How many grams of AgNO3 can be dissolved in 1.00L of this solution without a precipitate of AgCl(s) forming? Ksp of AgCl = 1.8x10^-10 Kf of [(Ag(NH3)2)+] = 1.6x10^-7

asked by Jeannie on April 14, 2010
57. ## Chemistry

When ammonium chloride is dissolved in water, the solution becomes colder. What can you say about the relative magnitudes of the lattice energy of ammonium chloride and its heat of hydration? Why does the solution form? What drives the process?

asked by Samantha on September 20, 2010
58. ## Chemistry

What is the volume of a solution of 0.5 M NaOH that must be added to adjust the pH from 4 to 9 in 20 mL of a 100 mM solution of phosphoric acid? Its been about 4 years since I've done this stuff. All I know is the pKa of phosphoric acid is 2.15 and I'm

asked by Waleed on September 23, 2010
59. ## Chemistry

I have water pH 7.0 insulation with various other things that do not affect pH, I am trying to add X amount of HCL to lower the solution to a pH of 1.5 I know pH=-log[HCl] but I'm not sure how to approach this problem, after this I am then trying to add

asked by Margaret on April 24, 2015
60. ## Shawn

How many milliliters of 0.355 M NaF solution are needed to react completely with 24.6 mL of 0.216 M CaCl2 solution? How many grams of CaF2 will be formed? The reaction is CaCl2(aq) + 2NaF(aq) → CaF2(s) + 2NaCl(aq)

asked by Chemistry on July 8, 2011
61. ## Chemistry

An aqueous solution contains 0.216 M ascorbic acid (H2C6H6O6) and 0.131 M hydrochloric acid. Calculate the ascorbate (C6H6O62-) ion concentration in this solution. [C6H6O62-] =______________ mol/L.

asked by Ana on April 21, 2012
62. ## Chemistry

Calculate the mass of NaCl required to cause dissolution of 0.010 moles of AgCl in 100 mL of solution. Consider that the addition of NaCl does not cause increased volume in the solution KSP (AgCl) = 1.0 x 10 ^ -10 KF (AgCl2) = 3.0 x 10 ^ 5

asked by Monica on April 15, 2016
63. ## Chemistry

A solution is 0.10M Pb(NO3)2 and 0.10M AgNO3. If solid NaCl is added to the solution what is [Ag+] when PbCl2 begins to precipitate? (Ksp PbCl2 = 1.7 x 10^-5; AgCl = 1.8 x 10^-10) The answers is 1.4 x 10^-8 How do I find the answer

asked by Fred on October 14, 2012
64. ## chemistry

A student wishes to prepare 1.000 g of silver chromate. How many mL of .05000M silver nitrate solution should be added to 50.00 mL of .0700M potassium chromate solution assuming 100% yield

asked by mom on September 25, 2012
65. ## Math

You have a piece of lumber that is 4 yards long. You want to cut lengths 2/3 yard long to use in a shelf you are building. How many shelves can you cut? Draw a picture of your solution. Explain your solution in words.

asked by Reyna Aureolus on December 3, 2018
66. ## Chemistry

Suppose you are going to add 450 mL of a 0.10 mol/L hydrochloric acid solution to 250 mL of a 0.2 mol/L sodium hydroxide solution. a)Which one is the limiting reactant? b)What is the theoretical yield of sodium chloride?

asked by Maame on December 10, 2011
67. ## chemistry

g)How many grams of agarose are needed to make 100 ml of 2.5% agarose solution?. h) Calculate the volume of buffer to which 500mL of 40 mM potassium chloride solution must be diluted to make a new concentration of 0.001M.

asked by roshan on September 13, 2011
68. ## science

I have used dilute-IT to make a o.1N solution of HCl in .6 N NaCl after bringing the solution to the exact mark on the volumetric flask it lost volume do to off gassing, do I bring it back up to the exact volume?.

asked by Michelle on September 2, 2011
69. ## Chemistry

Suppose we are dealing with calcium chloride as opposed to the chemical in the video. If a solution contains 70 g of calcium chloride per 100 g of water at 25 degrees Celsius, is the solution unsaturated, saturated, or supersaturated?

asked by Steptim on July 8, 2013
70. ## Chemistry

Suppose we are dealing with calcium chloride as opposed to the chemical in the video. If a solution contains 70 g of calcium chloride per 100 g of water at 25 degrees Celsius, is the solution unsaturated, saturated, or supersaturated?

asked by Moise on May 19, 2013
71. ## CHEMISTRY

If a solution is made by dissolving 15g of each solid in the same 100g of water at 70 degrees and the solution is cooled to 20 degrees, crystals are observed.. Which solid crystallises and explain in reference to both solids

asked by Gabrielle M on September 15, 2015
72. ## Chemistry

a solution of arsenic oxide containing 0.24g required 50cm^3 of acidified potassium manganate of solution of concentration 0.02M for complete oxidation. What is the oxidation state of arsenic in the product?

asked by Bela on October 22, 2014
73. ## chemistry

8.58g of coastic soada was dissolved to produce a solution of 500cm3 .to neutralize 50cm3 of this solution 15cm3 of 0.4M HCl was consumed .(coastic soada = Na2CO3.XH2O ) find the value of X?

asked by fathima on December 18, 2012
74. ## Chemistry

Calculate the pH of a 5.90 10-3 M solution of H2SO4 I have tried doing this as pH=-log[H+] and also by multiplying the Molarity by two because there are two hydrogens and then doing the -log but both ways have gotten me the wrong answer is there something

asked by Ashley on March 5, 2012
75. ## Chemistry

What is the volume of a solution of 0.5 M NaOH that must be added to adjust the pH from 4 to 9 in 20 mL of a 100 mM solution of phosphoric acid? Its been about 4 years since I've done this stuff. All I know is the pKa of phosphoric acid is 2.15 and I'm

asked by Waleed on September 23, 2010
76. ## Chemistry

2MnO4-(aq) +5 H2O2 (aq) + 6H+(aq) -> 5 O2(g) + 2 (Mn2+(aq) = 8H2O (l) If a 25.00 ml sample of hydro peroxide required 25.25 ml of .353 M KMNo4 solution to react with all the hydrogen perozide what was the molarity of the hydrogen peroxide solution?

asked by Vinny on June 7, 2011
77. ## chemistry

The mass of solute per 100 mL of solution is abbreviated as (m/v). Mass is not technically the same thing as weight, but the abbreviation (w/v) is also common. How many grams of sucrose are needed to make 655 mL of a 36.0% (w/v) sucrose solution?

asked by jackson on November 17, 2014
78. ## Chem

can you show how u got the ansr on this question? a small pebble is heated and placed in a foam cup calorimeter containing 25.0mL of water at 25 degrees celsius. the water reaches a maximum temp of 26.4 degrees celsius. how many joules of heat were

asked by Ryan on January 20, 2010
79. ## nutrition and wellness

HACCP are guidelines and regulations for food safety standards. True False As a matter of fact, the government has implemented a system for commercial food preparation, and the word “critical” is part of that system: it is called “Hazard Analysis

asked by y912f on July 15, 2009
80. ## Chemistry

1.)Find the PH of a solution with 0.20M NH3 with 0.15M of NH4Cl. 2.)Find PH of a solution with a mixture of 200mL of 0.50M HCHO2 and of 100mL of .50M NaCHO2.

asked by Chem help me! on May 1, 2012
81. ## chemistry

What volume of 9.54M sodium chloride solution must be added to the correct amount of water to produce 750. mL of a .327 M sodium chloride solution?

asked by Dee on November 17, 2010
82. ## chemistry

When 2.53 g of NaOH(s)(40.0g/mol) dissolves in 100.0 g of water, the temperature of the solution changes from 20 degrees C to 26.3 degrees C. Calculate qrx in KJ/mol specific heat of the solution is 4.18 J/(g*K)

asked by Tara on October 27, 2010
83. ## kv

A reference solution is to be prepared with 5 PPM parabenzopyrene (molecular weight = 252). The quantity of parabenzopyrene required for preparing one litre 5 PPM solution is

asked by poonam on March 5, 2013
84. ## science

you need to make a 3.5 Molar solution of Ca(OH)2, however, you only want to make 50ml of this Ca(OH)2 solution. How many grams of Ca(OH)2 will you need to weigh out and add to 50ml of water? Mass=VolumeinLiters*Molarity*Molmass

asked by brittany on December 12, 2006
85. ## chemistry

A buffer solution is made by dissolving 0.45 moles of a weak acid (HA) and 0.23 moles of KOH into 720 mL of solution. What is the pH of this buffer? Ka = 6.2 × 10−6 for HA. Answer in units of pH. please i need the answerf

asked by Anonymous on January 31, 2015
86. ## CHEMISTRY

If 33.7 ml of 0.210 M KOH is required to completely neutralize 27.0 ml of a HC2H3O2 solution, what is the molarity of the acetic acid solution? HC2H3O2(aq)+ KOH(aq)-->KC2H3O2(aq)+H2O(l)

asked by Michael on May 12, 2012
87. ## Chemistry

An aqueous antifreeze solution is 31.0% ethylene glycol (C2H6O2) by mass. The density of the solution is 1.039 g/cm3. Calculate the molality of the ethylene glycol.

asked by Maddie on March 14, 2013
88. ## Chemistry

Solid NaI is slowly added to a solution that is .010M in Cu+ and .010M in Ag+... a.) which compound will precipitate first b.) calculate [Ag+] when CuI just begins to precipitate c.)what % of Ag+ remains in solution.

asked by chemstudent on September 9, 2008
89. ## Utlwanang Barolong secondary school

physical science it is found that 40 ml of a 0.5mol.dm^-3 sodium hydroxide solution is needed to neutralise 20mol of the vinegar. calculate the pH of the sodium hydroxide solution

asked by Didimalang on June 30, 2015
90. ## Integrated Science

Equal quantities of a strong acid and a strong base are mixed together, forming a solution. What is the pH of the solution? A).close to 7 B).less than 7 C).greater than 7 D).close to 0 I believe the answer is C). Is this correct?

asked by Kiley on December 15, 2018
91. ## re-chem please

if i had a beaker with .0001M of Cu solution and copper solid (anode) and another beaker with 1M Cu solution and Cu solid (cathode), how would i calculate the half reactions of these two? would the two equations be: cu2+(aq) --> Cu(s) + 2e- and ?

asked by sarah on January 26, 2009
92. ## biochemistry

You have 325 mL of an 0.11 M acetic acid solution. What volume (V) of 2.00 M NaOH solution must you add in order to prepare an acetate buffer of pH = 5.07? (The pKa of acetic acid is 4.76.)

asked by joy on August 31, 2015
93. ## Chemistry II

A total of 30.6 g of potassium hydrogen phthalate is needed to completely neutralize a 500.0 mL solution of sodium hydroxide. What is the molarity of the sodium hydroxide solution?

asked by Mandy on October 21, 2009
94. ## Chemistry

If you try to carry out a double displacement reaction by mixing together equal volumes of a solution that contains dissolved NaF and a solution that contains dissolved NaCl. Would you expect a reaction? Why or why not?

asked by Rebecca on November 28, 2016
95. ## CHEMISTRY !!! HELP !

You have 875 mL of an 0.53 M acetic acid solution. What volume (V) of 1.30 M NaOH solution must you add in order to prepare an acetate buffer of pH = 4.94? (The pKa of acetic acid is 4.76.)

asked by Owen on September 26, 2015
96. ## Chemistry

Write an equation to represent the oxidation of I- to I2 in acidic solution, with ozone as the oxidizing agent. I know ozone will be reduced to H2O, but I am not sure how to figure out the acidic solution. Thank you!

asked by Anonymous on March 17, 2015
97. ## Chemistry

A stock aqueous solution contains 348.29 grams of NaCl per 1.000L. 68.00mLs of water is added to 10.00mLs of the stock solution. What is the molarity of the dilution???

asked by Jessica on August 24, 2011
98. ## chemistry

A pH glass/calomel electrode was found to develop a potential of -0.0390 V when used with buffer of pH 5.52. With an unknown solution, the potential was -0.360 V. Calculate the pH of the unknown solution

asked by Nikki on November 17, 2010
99. ## chemistry

commercial bleaching solution contains 5.25% by mass of NaClO in water.It has density of 1.08 g/mL. Calculate the molarity of the solution. (HINT:molar mass of NaClO 74.4 g/mol.)

asked by Ayana on May 18, 2019
100. ## chemistry(rusting)

i know that metal placed in more acidic solution will produce rust faster.but why metal placed near the sea shore will easily have rust?the wind with moisture which contains salt solution,right?

asked by Kong on November 8, 2011