# 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 139
1. ## chemistry help

In the following questions, assume that no excess distilled water was added from a wash bottle during the titration of 10.00 mL of vinegar with your standardized solution of NaOH. A. calculate the pH of vinegar. B. what was the pH of the solution after

asked by jk on April 1, 2015
2. ## chemistry

In the following questions, assume that no excess distilled water was added from a wash bottle during the titration of 10.00 mL of vinegar with your standardized solution of NaOH. A. calculate the pH of vinegar. B. what was the pH of the solution after

asked by jk on April 1, 2015
3. ## Chemistry

i. Which of the following solutions has the lowest pH (more acidic). Explain you answers. a. a 0.1 M solution of a strong acid or a 0.1 M solution of a weak acid. b. a 0.1 M solution of an acid with Ka=2×10-3 or one with Ka=8×10-6 c. a 0.1 M solutions of

asked by m on April 7, 2013
4. ## statistics

A mini-computer system contains two components, A and B. The system will function so long as either A or B functions. The probability that A functions is 0.95, the probability that B functions is 0.90, and the probability that both function is 0.88. What

asked by Paula on March 5, 2011
5. ## algebra

Solve. Simplify your answer. Type an exact answer using radicals as needed. y^2 + 31 = 12y Solution y = {8.236067978, 3.763932022} 1. y =(12-√20)/2=6-√ 5 = 3.764 2. y =(12+√20)/2=6+√ 5 = 8.236 Which would be the correct way to answer this equation,

asked by slomo on February 3, 2015
6. ## Chemistry

What is the pH of a 1.0E-8 M solution of HCl? Please note that you cannot simply add the contribution of H+ ions from the autoproteolysis of water and the contribution from the dissociation of HCl. You will need to use the quadratic equation to solve this

asked by Joel on September 3, 2010
7. ## "Given Molality, calculate..."

"Given: An aqueous solution of C6H12O6 with a density of 1.18 g/ml" I) Calculate Molarity 1) It firsts asks me to, "State the moles of solute" 2) Calculate the mass of the solute in grams - I think I can do this if I know how to get #1 3) Later it also

asked by Rachel on November 19, 2006
8. ## Chem

The hydrolysis of sucrose into glucose and fructose in acidic water has a rate constant of at 25 degrees C. Assuming the reaction is first order in sucrose, determine the mass of sucrose that is hydrolyzed when 2.60 L of a 0.150 M sucrose solution is

asked by Katherine on February 28, 2010
9. ## Biology

1) Why is it appropriate to call the endomembrane system a "system?" 2) The selective permeability of biological membranes is dependent on _______________. 3) Why is it unusual for a phosphlipid molecule to flip from one face of the membrane to the other?

asked by Dexter on January 9, 2010
10. ## LA HELP!!!!

PLZ HELP! 1. Part A In "All Together Now," Barbara Jordan's main purpose is to persuade readers that a tolerant society is best created by working on a small scale.*** inform readers of the recent history of the civil rights movement in the United States.

asked by Agal on November 28, 2016
11. ## math

Farhan is in a hurry to tidy up. without looking at the cases of 3 cds, farhan just puts the cds into the cases. how many different ways can the 3 cds be put into the cases? please show me what work you use to do this? im super confused. thx

asked by nicole on January 18, 2011
12. ## Math

Mary has 2/3 cup of chocolate chips. A cookie recipe calls for 1/2 cup of chocolate chips per batch. How many batches can bury make using all of her chocolate chips? Show your work and

asked by Anonymous on April 14, 2016
13. ## Algebra

2 pumps can fill a water tank in 45 minutes when working together. Alone, the second pump takes 3 times longer than the first to fill the tank. How long does it take the first pump alone to fill the tank? Show all work

asked by Anne on October 9, 2011
14. ## MATH !

Farhan is in a hurry to tidy up. without looking at the cases of 3 cds, farhan just puts the cds into the cases. how many different ways can the 3 cds be put into the cases? please show me what work you use to do this? im super confused. thx

asked by Anonymous on January 18, 2011
15. ## chemistry

Aspirin tablet, mass of tablet= 0.4149 g concentration of iron III salicylate complex = 3.997E-4, What is the concentration of ASA in the original solution? What is the mass of ASA in the original solution? The procedure was as follows: accurately weigh by

asked by Emma on November 20, 2012
16. ## chemistry

Aspirin tablet, mass of tablet= 0.4149 g concentration of iron III salicylate complex = 3.997E-4, What is the concentration of ASA in the original solution? What is the mass of ASA in the original solution? The procedure was as follows: accurately weigh by

asked by Emma on November 20, 2012
17. ## Chemistry

Aspirin tablet, mass of tablet= 0.4149 g concentration of iron III salicylate complex = 3.997E-4, What is the concentration of ASA in the original solution? What is the mass of ASA in the original solution? The procedure was as follows: accurately weigh by

asked by Emma on November 20, 2012
18. ## Science help ASAP

1. In which way does the circulatory system rely on the skeletal system? Glucose is secreted by compact bone as an energy source for blood. Spongy bone stores minerals needed by blood cells. Bones provide a source of oxygen to blood. Blood cells are

asked by Anonymous on May 5, 2014
19. ## physics

A 280 kg piano slides 4.3 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. Calculate: (a) the force exerted by the man, (b) the work done

asked by pauleen on October 7, 2009
20. ## Help Please!!!- Physics

A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting

asked by Jacob on November 22, 2013
21. ## physics

A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting

asked by Ashley on November 21, 2013
22. ## Chemistry

Consider a 67-g chunk of ice (∆Hfus = 6.0 kkJ/mol) in a beaker immersed in a water bath. To produce just enough heat to melt the ice, how many moles of solid NaOH (∆Hsoln = -445.1 kJ/mol) must you dissolve in the water bath? Please show all work.

asked by Stacie on June 19, 2013
23. ## Physics

The occupants of a car traveling at a speed of 30 m/s note that on a particular part of a road their apparent weight is 15% higher than their weight when driving on a flat road. a. Is that part of the road a hill or a dip? b. What is the vertical curvature

asked by Jorge on December 30, 2016
24. ## physics

A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting

asked by Ashley on November 21, 2013
25. ## Physics

A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting

asked by Ashley on November 20, 2013
26. ## Algebra 11th

Activity 1: Graphing To fill an order for Sizzlin' Sauce sauces, you bought 1050 green peppers and 1200 hot chili peppers. • Write and graph a system of inequalities to represent how many pints of each kind of sauce you can make. Use the recipes below.

asked by John on December 25, 2013
27. ## Geometry

ted skated through one of the face off circles at a hockey rink. His path through the circle is shown in the figure. Given that the face off circle is 15 feet in diameter what distance within the face off circle did Ted travel?? If you google this there

asked by Anonymous on February 23, 2016
28. ## math

What inequality those this graph show: file:///C:/Users/751017272/Desktop/y%20ilt%202x%20plus%202.png (Copy and paste it) Can you show me how you get your answer also? so i can write it in my notes.

asked by PleaseHelp(Again) on September 20, 2016
29. ## math

Evan is painting a stool that has a cylindrical seat and four rectangular prism legs. The seat has a diameter of 10 inches and a height of 3 inches. Each leg is 3 inches by 3 inches by 12 inches. How much area will Evan have to paint. use 3.14 for pi show

asked by datavia on August 19, 2014
30. ## physics

A sphere of mass 78 kg is attached to one end of a rope as shown in the figure below. It is found that the rope does an amount of work W = 3550 J in pulling the sphere upward through a distance 4.6 m. Find the work done by the force of gravity on the

asked by Dan on October 26, 2015
31. ## Math

1) 60 meters of fencing are needed to fence in a square lot. What is the area of the lot? a) 3600 m^2 b) 900 m^2 c) 225 m^2 d) 15 m^2 2) A can do a piece of work in r days and B, who works faster, can do the same work in s days. Which of the following

asked by Lenovo on July 24, 2014
32. ## Math

A design on a balloon is 2 cm wide when the balloon holds 47 cm^3. How much must the balloon hold for the design to be 6 cm wide? I'm confused about how to solve this. Could someone please show me the steps?

asked by Annie on May 30, 2011
33. ## Physics Help Please

Issac has to do 1000J of work on a 5kg box, and all the work he did simply went into lifting it above the ground. How high above the ground will the box be when all the work has been done?

asked by Marissa on November 28, 2011
34. ## PHSC

Explain the difference between the everyday use of the word "work" and the physical (physics related)use of the word "work".How is energy related to work?

asked by brandy on June 26, 2012
35. ## Algebra

Evaluate sqrt7x (sqrt x-7 sqrt7) Show your work. sqrt(7)*sqrt(x)-sqrt(7)*7*sqrt(7) sqrt(7*x)-7*sqrt(7*7) sqrt(7x)-7*sqrt(7^2) x*sqrt 7x-49*x ^^^ would this be my final answer?

asked by Alexa on February 17, 2016
36. ## algebra

solve for the indicated letter. y=5x, solve for x d=55t, solve for t

asked by Lisa on June 7, 2014
37. ## Algebra II

1.Solve: x(x2 + 16) = 0 2.Solve: 2x3 + 6x2 – x – 3 = 0 3. Solve: 2x = x2

asked by Christian on January 11, 2008
38. ## Math

Solve P=P(base 0)e^kt Solve for t? I have no idea how to solve this

asked by Eiban on October 17, 2014
39. ## algebra

solve the equation for x -2(2x-2)=2x for y 9x+y=9 solve theinequality 2x-6

asked by gary on November 8, 2014
40. ## calculus

answer the questions about the following function f(x)= 10x^2/x^4+25 a. is the point (-sqrt 5,1) on the graph b. if x=3, what is f(x)? what point is on the graph of f? c. if f(x)=1, what is x? what points are on the graph? d. what is the domain of f? e.

asked by Help--Please help!!!! on December 16, 2012
41. ## Chemistry

A compound is known to be a cesium halide, CsX. If 3.00 grams of the salt is dissolved in exactly 100.0 grams of water, the solution freezes at -0.735°C. What is the chemical formula for the salt? i know it would be -0.735= -1.86 * m m= 3g/ X g/mol/kg

asked by Susy on February 20, 2014
42. ## Math

did i work these problems right if not could some one show me how to work all three of them. 8.Represent the quantity with a real number: An altitude of 400 feet (ft) above sea level: 400 is a real number. I could also use 4 as a real number representing a

asked by Gertrude Sanders on November 9, 2008
43. ## PHYSICS

You push your physics book 2.20m along a horizontal tabletop with a horizontal push of 2.20N while the opposing force of friction is 0.500N . How much work does your 2.20N push do on the book? How much work does the friction force do on the book? How much

asked by JADE C. on August 30, 2014
44. ## Geometry

Jason designed an arch made of wrought iron for the top of a mall entrance. The 11 segments between the two concentric circles are each 1.25 m long. Find the total length of wrought iron used to make the structure. Round the answer to the nearest meter.

asked by Alexa on October 2, 2015
45. ## Chemistry

A buffer solution is prepared by mixing 50.0 mL of 0.300 M NH3 with 50 mL of 0.300 NH4Cl. The pKb of NH3 is 4.74. NH3 + H2O-> NH4+ +OH- 7.50 mL of 0.125 M HCl is added to the 100 mL of the buffer solution. Calculate the concentration of NH3 and NH4Cl for

asked by Dee on April 10, 2014
46. ## American Government

4. What is the strongest argument for supporting a jury system? a. to ensure that regional differences don't create differences in the law b. to ensure fairness through consideration of the verdict by more than one person*** c. to check the power of the

asked by Elise Bedford on April 18, 2017
47. ## Anatomy and Physiology

Movement of bones in the skeletal system is made easier because of the existence of connections between bones called. JOINT Organs arranged in such a way that together they can perform a more complex function than can any one organ alone are called.

asked by Erica on January 12, 2011
48. ## chem

a.)How many moles of NaOH are required to prepare 2.00L od 0.380M solution? answer is 0.760 mole of NaOH (mole/l * 2.00L) b.)What will be the molarity of a solution if 3.50 g of KOH are dissolved in water to make 150.0 mL of solution? answer is 0.52 M KOH

asked by Angel Locsin on November 30, 2012
49. ## CHEM-KSP/KA PROBLEMS

really don't quite understand how to set up a caluculation to figure out whether a precipitate will form and i'm struggling with the second half too! When 25.75 mL of 0.00826 M lead II nitrate is mixed with 75.10 mL of 0.0183 M sodium chloride solution,

asked by Sigurd on April 8, 2008
50. ## physics

2 forces pull horizontally on a heavy box. force b is directed 20 west of north and pulls twice as hard as force a. the resultant of these two pulls is 400N directly northward. using vector components to show two possible solutions to this problem: a. what

asked by courtney on August 21, 2015
51. ## Precalculus help fast

a farmer has available 1032 feet of fencing and wishes to enclose a rectangular area. If x represents the width of the rectangle for what value of x is the area the largest A) 256.5 feet b) 258 feet c) 256 feet d) 257 feet please show work! i need help

asked by Arielt on March 29, 2010
52. ## Precalculus

a farmer has available 1032 feet of fencing and wishes to enclose a rectangular area. If x represents the width of the rectangle for what value of x is the area the largest A) 256.5 feet b) 258 feet c) 256 feet d) 257 feet please show work! i need help

asked by Help now fast due tommorow!!!!!!!!!!!!!!!!!!!!!!!! on March 29, 2010
53. ## Math

Evan is painting a stool that has a cylindrical seat and four rectangular prism legs. The seat has a diameter of 8 inches and a height of 2 inches. Each leg is 2 inches by 2 inches by ten inches. How much area will Evan have to paint? Use three point one

asked by Matthew on January 20, 2012
54. ## Precalculus

a farmer has available 1032 feet of fencing and wishes to enclose a rectangular area. If x represents the width of the rectangle for what value of x is the area the largest A) 256.5 feet b) 258 feet c) 256 feet d) 257 feet please show work! i need help

asked by Help now fast due tommorow on March 29, 2010
55. ## Chemistry (concentration)

H2SO4(aq) + 2LiOH(aq) → Li2SO4(aq) + 2H2O(l) 3.2 moles of LiOH enter the reaction and are fully consumed. The molar mass of Li2SO4 is 110 g/mol. The final aqueous solution has a volume of 4.0 L. What is the final concentration of Li2SO4 in g/L? 44

asked by Summer on April 11, 2018
56. ## computer programming

: Create a program like KBC game show where program ask user 3 different question one after another and the user should answer them. If the answer are correct then pop up the message as “you got the right answer” and must ask user does he/she wants to

asked by ravi on January 21, 2012
57. ## Estimating DecimalsProducts and Quotients

Determine whether each product or quotient is resonable.If not resonable,find a resonable result. 1. 62.77(29.8)=187.0546 2.16.132/2.96=54.5 The numbers are correct except for the decimal places. The first one looks like 60*30 or 1800, so determine where

asked by Bowier4 on October 9, 2006
58. ## Computer Science

I need to write a program to solve for the following: Suppose that the file USPRES.txt contains the names fo the frist 43 United States presidents and the file USSENATE.TXT contains the names of all former and present US Senators. Write a program with

asked by Wally on March 4, 2011
59. ## math

The denominator of a fraction is 4 more than the numerator. If both the denominator and the numerator are increased by 1, the resulting fraction equals 1/2. What is the original fraction? **Need to show all work** Thanks for the help.

asked by Dylan on March 26, 2011
60. ## Algebra

The height of the flagpole is three fourths the height of the school. The difference in their heights is 4.5 m. What's the height of the school? Choices for school's height: 18, 20, 24. Please show work

asked by Anonymous on August 23, 2012
61. ## Algebra

The height of the flagpole is three fourths of the height of the school. The difference in their heights is 4.5 m. What's the height of the school? Choices for school's height: 18, 20, 24. Please show work

asked by Anonymous on August 23, 2012
62. ## Geometry

How much more pizza is in a 12-in. diameter pizza than an 8-in. diameter pizza? Round your answer to the nearest hundredth. Be sure to show all work and label your answer!

asked by Maria on April 7, 2017
63. ## Algebra I

The cost of 4 scarves and 6 hats is \$52. The cost of two hats is \$1 more than the cost of one scarf. What are the costs of one scarf and one hat? Please show me how to set this up and work it.

asked by Jane on February 21, 2013
64. ## algebra

In 2020 a​ city's budget is projected to be ​\$24 million. This is approximately 12/7 of the 2000 budget. What was the​ city's budget in​ 2000? please show all work

asked by merna on September 13, 2016
65. ## math

In a concert hall, 60% of the seats were taken. 520 seats were empty. What is the total number of seats in the concert hall? Show your work

asked by mav on October 1, 2018
66. ## chem lab

when an aqueous solution suspected of containing BA2+ or Pb2+ or both is mixed with sulfuric acid a precipitate forms. In another test, when the original solution is mixed with an aqueous solution of sodium sulfide no precipitate forms. What do these two

asked by natash on March 25, 2008
67. ## Chemistry

In a student's experiment, when 40 mL of 6% (w/w) hydrogen peroxide solution was reacted with 10 mL 0.5 M FeCl3 solution, a ΔrH of -3,382 J was calculated. Calculate ΔH for this reaction in kJ mol-1. Give your answer to 2 decimal places, do not include

asked by Anon on April 19, 2016
68. ## science(Chemistry)

Calculate the concentration of the NaOH solution. If 30,0cm3 of a standard oxalic acid[(COOH)2] solution of concentration 0,5 mol.dm-3,is used to neutralize 25,0 cm3 of a sodium hydroxide (NaOH) solution. The balanced chemical equation for the reation is

asked by Ntombikayise on July 14, 2011
69. ## Chemistry

A buffer solution is prepared by adding 14.37g of NaC2H3O2 and 16.00g of acetic acid to enough water to make 500mL of solution. What is the initial concentration of C2H3O2 in the solution? Ka(HC2H3O2)=1.8e-5 HC2H3O2 = H3O+ + c2h3O2 the molar mass of

asked by Hannah on April 14, 2012
70. ## Co-op

I have to writeabout the work setting and work environment of a pharmacy technician... I am allowed to copy and paste from a website as long as you reference it so I did... but all in all this is what I wrote.: Work environment: Pharmacy technicians work

asked by Katelyn on January 6, 2013
71. ## passing on species

I have to write an essay. I need some suggests as to where to start or some ideas as to what to write about. The topic is: One main biological objective for any living organism is to continue its species by reproducing and passing along genetic info.

asked by Liz on June 27, 2009
72. ## Alg 1

The owner of a hair salon charges \$20 more per haircut than the assistant. Yesterday the assistant gave 12 haircuts. The owner gave 6 haircuts. The total earnings from the haircuts were \$750. How much does the owner charge for a haircut? Solve by writing

asked by Emma on January 30, 2012
73. ## Algebra

The owner of a hair salon charges \$20 more per haircut than the assistant. Yesterday the assistant gave 12 haircuts. The owner gave 6 haircuts. The total earnings from haircuts were \$750. Hw much does the owner charge for a haircut? Solve by writing and

asked by Cierra on February 24, 2013
74. ## gr 11 Math

Solve for x 2^x+1 - 2^x = 112 Put this in exponent form: (3square root of x) ( square root of 3 cubed) Put into equation form: Horizontal stretch of 2, up 3, left 6, reflection on x-axis. Please help me with these three so I can work on the rest using

asked by Nancy on April 18, 2013
75. ## Math

Solve for x 2^x+1 - 2^x = 112 Put this in exponent form: (3square root of x) ( square root of 3 cubed) Put into equation form: Horizontal stretch of 2, up 3, left 6, reflection on x-axis. Please help me with these three so I can work on the rest using

asked by Nancy on April 18, 2013
76. ## Math- fraction equations

How would I solve this equation? d-1 = -1 1 ____ ___ 4 2 (d-1) divided by 4 = -1 and 1/2 Thanks, Ok, I'll set up your problem this way: (d-1)/4 = -1 1/2 -1 1/2 is the same as -3/2. Therefore: (d-1)/4 = -3/2 Multiply each fraction by a common denominator,

asked by Sarah on March 6, 2007
77. ## Math

I have a math question I am stuck on. It is on the applications of linear systems. This is the question: A club raised 5000\$ for a trip, they invested part of the money into a savings account with 4% interest, they put the rest of the money into a

asked by Vanessa on December 10, 2018
78. ## math-please help,need quickly

loga(x-5)-loga(x+9)=loga(x-7)-loga(x+9) all the a's are lower please show work

asked by anonymous on January 9, 2013
79. ## Chemistry

Calculate the molar concentration for each of the following. a)The concentration of a brine solution containing 225 g for pure sodium chloride dissolved in 4.00 L of solution. b)The volume that must be added to 4.2 mol of magnesium chloride to make a 0.045

asked by Lyn on November 22, 2015
80. ## math

Please help, 1) How do you solve 2017^2017 without a calculator? 2) What is the last digit of the solution to this problem: 2017^(2017^2017)? Thank you!

asked by Onet on March 10, 2017
81. ## english letter

Hello everybody! Today a I have to write a complain letter to "my"boss.I should write about my difficulties,and about what's bothering me. In the letter I should propose a solution as well. The situation is: Me(Julie,47 years old)has worked as a secretary

asked by Lulu on April 14, 2010
82. ## physics

please show me a simple formula to solve this find the final equilibirum temperature when 10.0 g of milk at 10.0degC is added to 1.60 * 10^2 g of coffee with a temperature of 90.0degC. assume the specific heats of coffee and milk are the same as for water

asked by Bella on February 22, 2009
83. ## Physics

To supply the plumbing system of a New York office building, water needs to be pumped to a tank on the roof, where its height will provide a "head" of pressure for all the floors. The vertical height between the basement pump and the level of the water in

asked by Steven on June 15, 2012
84. ## Chemistry

the lead (II) nitrate in 25.49 ml of a 0.1338M solution reacts with all of the aluminum sulfate in 25.00 ml solution. What is the molar concentration of the aluminum sulfate in the original aluminum sulfate solution? For a question like this how do I find

asked by CL on February 23, 2017
85. ## UIC

Given a diprotic acid, H2A, with two ionization constants of Ka1 = 3.57× 10–4 and Ka2 = 3.14× 10–12, calculate the pH and molar concentrations of H2A, HA–, and A2– for each of the solutions below. (a) a 0.182 M solution of H2A (b) a 0.182 M

asked by Anonymous on October 18, 2015
86. ## Physics

The method by which the Mars exploration rovers, Spirit and Opportunity, landed on the surface of Mars in January of 2004 was quite elaborate. The rovers began their descent through the thin Martian atmosphere on a parachute until they reached an altitude

asked by Frances on September 7, 2007
87. ## chemistry

consider a crystallization of sulfanilamide in which 10 mL of hot 95% ethyl alcohol is added to 0.10 g of impure sulfanimide. after the solid has dissolved, the solution is cooled to room temp. and then placed into an ice-water bath. no crystals for, even

asked by BOB on October 7, 2008
88. ## Foreign languages

Can you please check these sentences, Writeacher? 1) We...... (sit) in the sun for ... when she (tell) us to get inside. 2)We had been sitting in the sun for about half an hour when she told us to get inside. 3) Peter confessed to eating all the cake.

asked by John on July 2, 2012
89. ## Physics

When one gallon of gasoline is burned in a car engine, 1.20 108 J of internal energy is released. Suppose that 0.99 108 J of this energy flows directly into the surroundings (engine block and exhaust system) in the form of heat. If 5.0 105 J of work is

asked by please help on January 13, 2013
90. ## Chemistry

Powdered AgOH is slowly added to 2.0 L of a 0.020 M solution of NaOH until no more AgOH will dissolve. If Ksp = 1.4 x 10 -8 for AgOH: a. What is [Ag +] in the saturated solution? b. What mass of AgOH had to be added to the solution to produce this

asked by joseph lungu on April 19, 2018
91. ## Chemistry

A saturated solution of Mg(OH)2 is prepared having a large excess of Mg(OH)2. Sn(NO3)2 is added to the solution. Ksp = 1.8 10-11 for Mg(OH)2 and Ksp = 5.1 10-26 for Sn(OH)2. (a) What [Sn2+] is required to start the precipitation of Sn(OH)2? (b) What [Sn2+]

asked by Gregory on March 14, 2013
92. ## Chemistry

Consider the titration of 50 mL of 0.250 M HCl with 0.1250 M NaOH. Calculate the pH of the resulting solution after the following volumes of Na OH have been added. a) 0.00 mL b) 50.00 mL c) 99.90 mL d) 100.00 mL e) 100.1 mL The question is, I get, for

asked by George on April 27, 2013
93. ## chemistry

A solution of iron(III) thiocyanate was produced by dissolving 7.98 milligrams solid iron(III) thiocyanate in enough water to produce a 100.00 mL solution. What is the concentration, in molarity, of the solution?

asked by Anonymous on November 6, 2013
94. ## chemistry

ihave two solutions. in the first solution , 1.0 moles of sodium chloride is disslved to make 1.0 liters of solution . in the second one, 1.0 moles of sodium chlorine is added to 1.0 liters of water.is the molarity of each solution the same?

asked by wendy on February 13, 2012
95. ## physics

In another solar system, a 100,000 kg spaceship and a 200,000 kg spaceship are connected by a motionless 90 m long tunnel. The rockets start their engines at the same time, and each produces 50,000 N of thrust in opposing directions. What is the system's

asked by Anonymous on December 11, 2012
96. ## biology a

Read the scenario. A cell contains 90% water and 10% salt. The external solution contains 75% water and 25% salt. Which statement is correct? A>> The external solution is hypotonic, so the cell will shrink B>> The external solution is hupotonic, so the

asked by Rylee on February 12, 2018
97. ## Math

At the first tri-city meeting, there are 8 people from town A, 7 people from town B, and 5 people from town C. If a council consisting of 5 people is randomly selected, find the probability that 3 are from town A and 2 are from town B. How would I show my

asked by Punkie on December 6, 2009
98. ## SS

What is the difference in the mission system used by the spanish and the empresario system? A. The Spanish sent out missionaries sponsored by the state and the empresario system had empresarios that settled on their own land. ** B. Both the Spanish and

asked by Check my answer on October 17, 2017
99. ## Chemistry

A 2.80-g sample of haematite ore containing Fe3+ ions was dissolved in a concentrated acid and the solution was diluted to 250 mL. A 25.0 mL aliquot was reduced with Sn2+ to form a solution of Fe2+ ions. This solution of Fe2+ ions required26.4mL of a

asked by Luke on August 23, 2016
100. ## Computer Science

0 down vote favorite I have to print: Ain't no sunshine when she's gone It's not warm when she's away. Ain't no sunshine when she's gone And she's always gone too long Anytime she goes away. How would I used methods to print these no loops? Would it be

asked by Jake on September 26, 2015