# 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 185
1. ## Chemistry

Assume that 50g of KCl is dissolved in 100g of water at 100*C and the solution is allowed to cool to 30*C. How much KCl crystallizes from the solution?

asked by Anonymous on July 28, 2017
2. ## Chemistry

It takes 56 mL of 0.124 M KOH to neutralize 45.4 mL of H2SO4 solution. What is the concentration of the H2SO4 solution? Answer in units of moles/liter

asked by Cheyenne on September 23, 2010
3. ## Chemistry

Suppose that 10.9 mL of HNO3 is neutralized by 83.9 mL of a 0.0021 < solution of KOH in a titration. Calculate the concentration of the HNO3 solution. Answer in units of M

asked by Laura on March 21, 2013
4. ## Chemistry

Suppose you wanted to dissolve 106g of Na2CO3 in enough H2O to make 6.00 L of solution. A. What is the molar mass of Na2CO3? B. What is the morality of this solution?

5. ## Chemistry

A 495-mL sample of unknown HCl solution reacts completely with Na2CO3 to form 18.1g CO2. What was the concentration of the HCl solution?

asked by Jenn on May 5, 2014
6. ## CHEMISTRY- molality

a sucrose solution was prepared by dissolving 13.5g sucrose in enough water to make 100ml of solution. the density is 1.050gml. calculate molality

asked by lucy on October 9, 2010
7. ## science

if a solution is made by adding 83 grams.of soduim hydroxide to 750 ml.of water what is the percent by mass of sodium hydroxide in the solution?

8. ## Physics

The freezing point depression of a .100 m solution of NaCl solution is .34C. Calculate the percent dissociation of NaCl.( Kf for water=1.86) Please help

asked by Sammy on August 27, 2009

You dissolve 6.55 g of potassium nitrate in enough water to make a 250. mL solution. What is the molarity of this solution ?Answer: 0.0262 Please Check my answer

asked by Wurola on April 23, 2012
10. ## Chemistry

1- Determine the [OH-] and pH of a solution that is .250 M in HCO-3 2- Calculate the [H3O+] and pH of each polyprotic acid solution: a) .125 M H2CO3 b) .125 M H3C6H5O7

asked by Joey on March 14, 2011
11. ## chemistry

Indicate which type of reaction this belongs to 1) interaction of iron and steam in a closed solution 2) the action of chlorine on iron(ii)chloride solution?

asked by POPPY on April 4, 2019
12. ## Chemistry

Pb(NO3)2(aq) 2 x 10-3 M Na2SO4(aq) 2 x 10-3 M Pb(NO3)2(aq) + NaSO4(aq) → PbSO4(s)+ 2NaNO3(aq) a) What are the concentrations of each ion within this solution? b) If 1L of each solution is mixed; will a precipitate form? why?

asked by Jake on May 15, 2012
13. ## Chemistry

Suppose that 10.9 mL of HNO3 is neutralized by 83.9 mL of a 0.0021 < solution of KOH in a titration. Calculate the concentration of the HNO3 solution. Answer in units of M

asked by Laura on March 21, 2013
14. ## Chemistry

A solution was prepared in which 12.0 g of glycerin was dissolved in 80.0 g of water. The freezing point of the solution was -3.03 °C. Use this information to determine the molar mass of glycerin.

asked by Megale Russell on December 5, 2013
15. ## Chemistry

What formula do I use to figure. 16.5 g of KCL (MM=74.55 g/mol) is dissolved in enough water to make 575 mL of solution. Calculate the molarity of the KCl solution.

asked by Norma on July 25, 2010
16. ## Chemistry

A student needs 0.14 mol of sodium sulphate to do an analysis. the concentration of the available solution is 2.6 m/L. What volume of the solution should the student measure out? What I've tried: C=N/V V=C/N V=2.6/0.14 V=18.6 The answer in the textbook

asked by AlphaPrimes on March 27, 2016
17. ## General Chemistry

I add 5 drops Potassium Iodide (KI) to 5 drops lead nitrate (PbNO3). The solution is centrifuged and the aqueous layer is discarded. I then add 5 drops of nitric acid (HNO3), 5 drops of hydrogen peroxide and 10 drops of dichloroethane (C2H4Cl2) to the

asked by Kay on October 8, 2012
18. ## Cos(pi/4 + h) = 2^(-½)[1 - h - h^2/2 + h^3/6 +..]

This reply to some student got deleted, so I'm reposting it. Cos(pi/4 + h) = Cos(pi/4)Cos(h) - Sin(pi/4)Sin(h) = 1/sqrt(2)[1 - h - h^2/2 + h^3/6 + h^4/24 - h^5/120 - h^6/720 + ...] Note that the way students like you are asked to solve this and similar

asked by Count Iblis on May 6, 2007
19. ## math

Your business provides a service to local residents. Your fixed costs are \$2,000 per month, and you expect 40 customers per month. The variable cost associated with each service is \$35. 1. Using cost-based pricing and a markup of 20%, what should the price

asked by shirley on October 24, 2014
20. ## math

Your business provides a service to local residents. Your fixed costs are \$2,000 per month, and you expect 40 customers per month. The variable cost associated with each service is \$35. 1. Using cost-based pricing and a markup of 20%, what should the price

asked by larry on October 24, 2014
21. ## math

The roots of the equation x^4 - 3x^2 + 5x - 2 = 0 are a, b, c, d. By the relation y=x^2, or otherwise, show that a^2, b^2, c^2, d^2 are the roots of the equation y^4 - 6y^3 + 5y^2 - 13y + 4 = 0. The 2nd part of the question asks: find the value of s~2

asked by jack on September 11, 2006
22. ## chemistry

when chlorine gas is bubbled into a solution of sodium bromide, the sodium bromide reacts to give bromine a red brown liquid and sodium chlorine. A solution was made by dissolving 20.0g of sodium bromide in 100.0 g of water. After passing through the

asked by Anonymous on September 17, 2012
23. ## chemistry

when chlorine gas is bubbled into a solution of sodium bromide, the sodium bromide reacts to give bromine a red brown liquid and sodium chlorine. A solution was made by dissolving 20.0g of sodium bromide in 100.0 g of water. After passing through the

asked by Anonymous on September 17, 2012
24. ## GEOMETRY

DETERMINE WHICH IF ANY,OF THE THREE STATEMENTS ARE EQUIVALENT. GIVE A REASON FOR YOUR CONCLUSION.SHOW COMPLETE WORK. 1) iF THE DOG LICKS HER NOSE, THEN THE DOG IS NOT HAPPY. 2) IF THE DOG LICKS HER NOSE,THEN THE DOG IS HAPPY. 3) iF THE DOG IS NOT

asked by angela on June 2, 2012
25. ## MATH

1 D = 10^-18 statC·cm = 10^-10 esu·Å = 1⁄299,792,458×10^−21 C·m ≈ 3.33564×10^−30 C·m ≈ 1.10048498×1023 ≈ 0.393430307 au A dipole of 1 Debye is equal to 3.33 x 10-30 C m . Show that in atomic units 1 D = 0.39345 au. The above is the

asked by Taylor on April 14, 2013
26. ## Math

Don signed an apartment lease for \$500 per month. He has a budget of \$120 per month for food and \$150 for utilities. Please show me how to rite an inequality to show the minimum monthly salary Don needs to earn just for living expenses. How would I graph

asked by monty on January 26, 2015
27. ## Physics

A single photon in empty space is converted into an positron and an electron, each with rest mass 511Mev. (a) show this transformation is not possible (dynamaically). (b)How could this transformation be made posible. (c)what is the minimum photon energy

asked by Forest on June 12, 2011
28. ## math,correction,help

please can someone tell me where i am wrong. Directions: Translate to a system of equations and solve. Problem: Colored copies cost 10cents per copy and white copies cost 5cents per copy. Sandy made 400 copies, some of which were colored and the rest

asked by jasmine20 on January 13, 2007
29. ## Chemistry

Write the following into a balanced equation. a) When a mixture of copper (II) oxide and carbon is heated, elemental copper forms and carbon monoxide evolves into the atmosphere. b) When a concentrated solution of sodium hydroxide is added to an aqueous

asked by Royce on October 23, 2015
30. ## Math2

Bob has entered his giant pumpkin into the tops field fair in New England. To qualify for the finals, pumpkins must meet a minimum weight requirement, which is based on the weights of all of the entries. This year, 55.17% of all entries will make it to the

asked by Candice on June 29, 2016

1. Who invented the sewing machine? A.Elias Howe******* B.Robert Fulton C.Samuel Morse D.John Deere Answer A. 2. By 1860 the Midwest and the east were united by a network of_____? A. Roads B. Railroad tracks**** C. Canals D. Steam-powered ships Answer B 3.

asked by Sarah W. on February 22, 2016
32. ## Earth

1. If the Earth were the size of B-B (with a radius of about 0.2 centimete), how big would the Sun be? How big would the Milky Way be? 2. Imagine building a model of the Solar System on your campus. Work out the diameter and spacings of the planets in

asked by Sunny on April 3, 2007
33. ## Chemistry

Question 2: Use your balanced equation to calculate the volume of 0.12 M Na3PO4 to stoichiometrically react with the 3.0 mL of Co (NO3)2. Show your work. 3) Discuss how your supernatant color in the 6 different test tubes supports your calculated result in

asked by Question on March 1, 2015
34. ## Calculus

Score for Question 2: ___ of 40 points) For the polynomial (x)=x^5-5x^4+12x^3-24x^2+32x-16 , answer the following questions. Show all of your work. How many zeros does the function have over the set of complex numbers? What is the maximum number of local

asked by Kat on January 17, 2018
35. ## MATH

Create a rational function with a linear binomial in both the numerator and denominator. Part 1. Graph your function using technology. Include the horizontal and vertical asymptotes and the x- and y-intercepts on your graph. Label the asymptotes and

asked by MOM on June 9, 2016
36. ## Chemistry

1)Calculate the number of mL of a 0.095 M NaOH solution required to neutralize 25.0 mL of 0.15 M acetic acid solution 2) Calculate the molarity of a sodium hydroxide solution if 22.0 mL of the sodium hydroxide is required to neutralize 0.50 g of KHP.

asked by Casey on September 27, 2016
37. ## Chemistry

1)Calculate the number of mL of a 0.095 M NaOH solution required to neutralize 25.0 mL of 0.15 M acetic acid solution 2) Calculate the molarity of a sodium hydroxide solution if 22.0 mL of the sodium hydroxide is required to neutralize 0.50 g of KHP.

asked by Casey on September 27, 2016
38. ## Chemistry

Calculate the molarity of Fe(NO3)3 in Solution A. Solution A: Mass of Fe(NO3)3 solid: 1.21g & Vol of Solution: 100mL In a previous ? Using the mass I weighed 404.0g/mol to calculate moles of Fe(NO3)3 in solid hydrate----I got 0.00300 mol Fe(NO3)3)

asked by Rosie on October 17, 2016
39. ## math

Solve each formula for n. 2n = 4xp-6 3m-n=4s r/n+2=p t=100(n+3) pv/nR=T 8a+2=6b In the first example, divide both sides of the equation by 2 In the second example, add n to both sides of the equation. Try these yourself. They aren't that hard. We will be

asked by nae on March 29, 2007
40. ## Chem

Which of the following results from the presence of a solute in a given solvent? A. The vapor pressure of the solution is lower than that of the pure solvent. B. The boiling point of the solution is lower than that of the pure solvent. C. The freezing

asked by Cherry on August 8, 2016
41. ## chem1151

please me solve During an experiment to measure the efficacy of an antacid tablet, an antacid tablet was dissolved in deionized water. Then 75.0 milliliters of 0.268 M HCl solution were added to the flask containing the dissolved tablet. How many moles of

asked by linda on April 15, 2012
42. ## math

2r+4=10 Well r=3 so that means 2xr=6 and 6+4=10. Hint: whenever a number and letter are close together you have to multply thme like 2r. The value for r is indeed 3! Another way to think about this problem is to start by subtracting 4 from both sides of

asked by Bonnie on April 18, 2007
43. ## Geography

Due or Response: 9/12/2018 Hello, My question for you today is: Why is federal system of government more complex then a unitary system? A. Power is divided into many laws. B. The people get to make laws for the country. C. Decisions are made by a group of

asked by Warrior Cat Lover on September 12, 2018
44. ## child development

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

asked by bev on August 25, 2015
45. ## chemistry

write a balanced equation for the reaction that occurs when an aqueous solution of iron(II) chloride is mixed with an aqueous solution o potassium hydroxide.

asked by Lili on October 16, 2008
46. ## Chemistry

The solute molecules mixed with the solvent molecules in a solution cause the freezing point of a solution to be ______ than it is for an equal volume of pure _________.

asked by Cecilia on August 21, 2010
47. ## Chemistry

I have to prepare 1ppm of Fe+2 solution in 1litre. How many grams of ferrous ammonium sulphate will be dissolved in 1litre to make above solution.. plzz guide me

asked by Syed on October 31, 2015
48. ## Chemistry

A solution is made by dissolving 10.9 g of calcium chloride, CaCl2,in enough water to make exactly 500 mL of solution. What is the concentration (molarity) of CaCl2 in mol/L?

asked by Shelia on July 24, 2010
49. ## Chemistry

an aqueous solution contains 1.00g/L of a derivative of detergent lauryl alcohol.the osmotic pressure of this solution at 25 °c is 2.0 x 10³ Nm-², what is the molar mass of the detergent.

asked by Eleanya on March 4, 2018
50. ## Chemistry

How many mL of a solution of NaOH with pH equal to 1.395 x 101 do you need to mix with pure water to obtain 399 mL of a final solution with pH equal to 9.066 ?

asked by Summer on January 17, 2012
51. ## Chemistry

A student mixes 675 mL of water and 256 mL of 3.30 x 10-5 M orangefood dye solution. What is the concentration of this new dilute solution of orange food dye?

asked by Anonymous on May 16, 2016
52. ## chemistry

predict whether or not a precipitate will form if you mix 75ml of a NaOH solution with pOH = 2.58 with 125ml of a 0.018M MgCl2 solution. Identify the precipitate, if any.

asked by glenn on April 9, 2011
53. ## chemistry

Use the following balanced equation. 3Sr(OH)2 + 2H3PO4 --> 6H20 + Sr3(PO4)2 20 mL of H3PO4 is required to react with 40 mL of a 0.15 M Sr(OH)2 solution. What is the molarity of the H3PO4 solution?

asked by Brea on June 20, 2011
54. ## chemistry

What is the percent by volume (% v/v) of a solution made by mixing 12 ml of ethanol (C2H5OH) with 48 ml of water? b) Assuming the density of ethanol is 0.789g/ml, what is the molarity of this solution?

asked by ben on March 19, 2013
55. ## Chem

A titration was performed in which 56 ml of a .022M HCL solution was used to titrate 50 ml of a PB(NO3)2 solution a) what was original concentration of the Pb(NO3)2? b) How many grams of PBCl2 will ppt?

asked by MAX on October 9, 2010
56. ## chemistry

find the mass of sucrose(molecular mass=342)required to be dissolved per 600cm3 solution to prepare a semi molar solution

asked by anonymous on July 31, 2013
57. ## Chemistry

An unknown solution was treated with BaCl2 and a white precipitate formed which did not dissolve in hydrochloric acid. What anion(s) could be present in the unknown solution?

asked by Shines on October 15, 2013
58. ## Science

What is the molarity (moles per liter) of a solution in which 80 grams of sodium hydroxide, NaOH, is dissolved in 1 liter of solution? How do I convert the 80grams into mols?

asked by Lilly on October 29, 2014
59. ## Chemistry

An aqueous solution contains 0.196 M hydrosulfuric acid and 0.190 M hydrochloric acid. Calculate the sulfide ion concentration in this solution. [S2-] = _________mol/L.

asked by Ana on April 24, 2012
60. ## Chemistry

A student mixes 450 mL of water and 116 mL of 7.90 x 10-5 M greenfood dye solution. What is the concentration of this new dilute solution of green food dye?

asked by Tif on April 29, 2013
61. ## Chem3

A solution is prepared by dissolving 22.8 mL of methanol (d = 0.782 g/mL) in 100 mL of water (d = 1.00 g/mL) so that the final volume of solution is 118 mL. What is the percent methanol by mass?

asked by Ryan on May 2, 2011
62. ## Chemistry

0.000341 g fluorescein (332.32 g/mol) is dissolved in 255 mL solution of ethanol. The density of ethanol is 0.785 g/mL. What is the concentration of the solution in molarity (M)?

asked by Anon on July 16, 2012
63. ## chem

Calculate the number of moles of solute present in each of the following solutions. a) 39.0 mg of an aqueous solution that is 1.00 m NaCl b)90.0 g of an aqueous solution that is 2.10% sucrose (C12H22O11) by mass.

asked by Samantha on January 19, 2013
64. ## math help

A lab assistant wants to make FIVE LITERS of 31.2% acid solution. If solutions of 40% and 18% are in stock, how many liters of each must be mixed to prepare the solution. i don't even know what equation to use or anything, please help me, thank you.

asked by amy on March 29, 2012
65. ## science

The concentration of commercially available concentrated nitric acid is 70% , or 15.9M In 100 grams of solution there are 1.11 mol of HNO3. Calculate the volume of 100 g of the Solution.

asked by Lahna on July 3, 2011
66. ## Chemistry

Consider a 0.71 M solution of each of the following salt dissolved in distilled water. Will the solution by basic, neutral, or acidic? KI= NH4NO2= (CH3CH2)3NHNO2= (CH3CH2)2NH2ClO4=

asked by Chris on December 11, 2012
67. ## chemistry2

Hydrochloric acid is sold as a concentrated acqueous solution. If the molarity of HCl is 12.0 and its density is 1.18 g/ml. calculate A) MOLALITY B)THE % BY MASS OF HCl in the solution

asked by Daniel Forero on May 11, 2011
68. ## Chemistry

2g AgCl is obtainded by adding an excess of AgNO3 solution to a solution containing 1g of a mixture of NaCl and KCl.What is the ratio of moles of two salts in the mixture?

asked by Anamika on February 22, 2016
69. ## chemistryyyy

(a) What is the pH of a 6.1 ✕ 10-5 M Ca(OH)2 solution? (b) What is the H3O+ concentration of the solution? I already know the answer to part A, I just don't understand how you could use that information to find the concentration of H30+ when its not in

asked by Ana on February 23, 2014
70. ## Algebra

Determine the value or values of d that complete the square for the expression. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION.) (a) x^2 + 7x + d d = b) x^2 − 18x + d d = (c) x^2 + dx + 64 d = (d) x^2 + dx +

asked by Ashton on September 13, 2014
71. ## chemistry

What volume of solution would be needed to deliver the stated amount of solute? 237 milligrams of solute from a solution that is 32.0 ppm? answer in liters

asked by toby on April 26, 2012
72. ## chemistry

Using a pipet, 25 mL of a 0.1205 M HCl solution was placed in a 100 mL volu metric flask and the flask filled to the mark with water. What is the concentration of the new solution?

asked by James on May 18, 2011
73. ## Chemistry

Calculate the molarity of Na2C204 solution prepared by dissolving 1.2222 grams of pure Na2C204 in enough water to make 500.00 mL of solution.

74. ## Chemistry

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

asked by Dave on February 25, 2015
75. ## Chemistry

Calculate the molarity of Na2C204 solution prepared by dissolving 1.2222 grams of pure Na2C204 in enough water to make 500.00 mL of solution.

76. ## calculus

Please help. I have an implicit answer to a differential equation of 18y*sqrt(y)=(2(x^2-6x+23)^3/2)/3 plus arbitrary constant. What is the particular solution to this for which y=2 when x=1. And then express this particular solution answer in an explicit

asked by paul on May 20, 2011
77. ## chemistry urg!

Hydrochloric acid is sold as a concentrated acqueous solution. If the molarity of HCl is 12.0 and its density is 1.18 g/ml. calculate A) MOLALITY B)THE % BY MASS OF HCl in the solution

asked by Daniel Forero on May 11, 2011
78. ## Chemistry

What is the ionic strength, I, of a solution at 25C containing 0.002 mol/L of BaSO4 and 0.001 mol/L of BaCl2? What is the activity coefficient of Ba2+ in this solution?

asked by Me on April 8, 2014
79. ## math

in her chemistry class, Lauren must produce 300ml of an 80% acid solution. Her teacher gives her two concentrations of acid solution, a 50% and a 100%. determine how much of each concentration that she must use.

asked by garrick on September 15, 2008
80. ## chemistry

The molarity of urea in a solution prepared by dissolving 16 g of urea (MW = 60.0 g/mol) in 39 g of H2O is __________ M. The density of the solution is 1.3 g/mL. i get 8.9 but the practice test says the answer its 6.3

asked by BenY on September 26, 2010
81. ## chemistry

An aqueous solution is 0.273m kcl. What is the molar concentration of potassium chloride, kcl? The density of the solution is 1.011 x 1 1000 g/L Who helps me

asked by Fai on December 16, 2012
82. ## chemistry.

When 41.81 of a solution of aqueous sliver ions with a concentration of 0.2040 mol dm3 is added to a solution of XO-3/4 ions, 1.172g of the precipitate is formed? ..Can any one help me with that! NB: -3/4 mean that 3 is up and 4 is under it.

asked by Mark on December 3, 2009
83. ## chm

Calculate the PH OF A SOLUTION prepared by mixing 15.0mL OF 0.50 M OF NaOH AND 30.0mL OF 0.50 M BENZOIC ACID SOLUTION?( Benzoicacid is monoprotic and its dissociation constant is 6.5*10^-5)

asked by ami on March 31, 2010
84. ## chemistry

In an experiment designed to determine the concentration of Cu+2 ions in an unknown solution, you need to prepare 100 mL of 0.10 M CuSO4 as your stock solution. How many grams of CuSO4(s) should you use?

asked by Jessie on March 3, 2017
85. ## chemistry

A 25.0-ml sample of 1.00M KBr and a 75.0-ml are mixed. The solution is then heated to evaporate water until the total volume is 50.0 ml. What is the Molarity of the KBr in the final solution

asked by Mary on February 9, 2014
86. ## maths

x^2-7x = 0 substitue x=7 into the equatiopn and explain why this shows that x=7 is the solution. ok so i do this: if x=7 then the equation becomes 7^2-49=0 7^2=49 49-49=0 so x=7 is correct (is that explanation enough?) now i have to write out a complete

asked by Marian on March 1, 2011
87. ## chemistry

A sample of solid ammonium chloride, NH4Cl, is dissolved in water. The solution formed was found to be acidic. Can you please explain why the solution is acidic?

asked by lilliso on July 14, 2014
88. ## Chemistry

A 453 mL solution has a chloride concentration of 0.0253 M. This solution was prepared by adding solid FeCl3 to water. How many grams of FeCl3 are required?

asked by Kim on October 5, 2015
89. ## Chemistry

You have an unlimited amount of 12M HCl stock solution. You need to neutralize 2.00 grams of NaOH by slowly adding 0.100M HCl solution.

asked by Shelby on November 25, 2011
90. ## Chemistry

A titration was performed in which 56 ml of a .022M HCL solution was used to titrate 50 ml of a PB(NO3)2 solution a) what was original concentration of the Pb(NO3)2? b) How many grams of PBCl2 will ppt?

asked by MAX on October 9, 2010
91. ## Chemistry

You need to find the freezing point of a 1.50m aqueous NaCl solution. You calculate []Tf to be 1.86 degrees C/m x 3.00m or 5.86 degrees C. What is the temperature at which the solution freezes?

asked by Kim on April 27, 2010
92. ## Chemistry

Need Help!! Describe how to make 2.5L of 0.1M HCL solution from 12M HCL concentrated solution and water. I got help earlier but still could not figure out the calculations. Please help, it has been a while since i took chemistry. Thank you soo much

asked by debbie on August 29, 2012
93. ## chemistry

Calculate the theoretical yield of the precipitate formed when a solution containing 1.02 grams of lithium phosphate is mixed with a solution containing 2.72 grams of strontium nitrate

asked by Rayna on April 19, 2012

Determine a possible linear function f(x) such that x^2-x-2 < f(x)< x^3-x^2-2x has a solution and state the solution.(the < are supposed to have lines under that indicate less than/equal to) I just don't really get what it's asking. So I factored each

asked by Laura on October 24, 2017
95. ## Chemistry

Suppose that 18.84 mL of 0.315 M Ca(OH)2 is required to neutralize 18.2 mL of aqueous HCl solution. What is the molarity of the HCl solution? All help is appreciated. Would also like help showing which numbers go where within any equations! Thanks so much!

96. ## Chm General 2

if a student doing an experiment failed to dry the KHP before using it to standarize the NaOH solution. A) Would her calculated molarity of the NaOH solution probably be too hight or too Low?

asked by Karla on March 23, 2011
97. ## CHEMISTRY

If the OH ion concentration in an aqueous solution at 25 celsius is 3.4x10^-3 M the the H concentration in moles per liter in the same solution is? answers is 2.9x10^-12 i do the -log and i get 2.46 i don't know that else

asked by HELPP on October 26, 2011
98. ## Chemistry

54.0 mL of a 1.50 M solution is diluted to a total volume of 258 mL. A 129-mL portion of that solution is diluted by adding 165 mL of water. What is the final concentration?

asked by Sara on February 2, 2013
99. ## chemistry

a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl. whats wrong 25 g NaCl 1.0 L solution 1.0 g/mL 25

asked by Kyle on January 5, 2015
100. ## CHEM

In the preparation of a rock salt solution, 1.522 grams of impure rock salt was dissolved in 50.0 ml of distilled water. The total mass of the solution was found to be 51.522 grams. Calculate the weight percent of impure rock salt in the prepared solution.

asked by julia on September 26, 2014