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

92,096 questions, page 772

Using the numbers 5, 8, and 24, create a problem using no more than four operations (addition, subtraction, multiplication, division, square, square root, cube, cube root) where the solution will be an irrational number. Explain why the result of your

asked by April :) on November 13, 2012

Using the numbers 5, 8, and 24, create a problem using no more than four operations (addition, subtraction, multiplication, division, square, square root, cube, cube root) where the solution will be an irrational number. Explain why the result of your

asked by Jessica on November 13, 2012
3. Algebra II

A restaurant sells about 330 sandwiches each day at a price of \$6 each. For each \$.25 decrease in price, 15 more sandwiches are sold per day. How much should the restaurant charge to maximize daily revenue? Explain each step of your solution. What is the

asked by Mo on December 17, 2014
4. math

Using the numbers 5, 8, and 24, create a problem using no more than four operations (addition, subtraction, multiplication, division, square, square root, cube, cube root) where the solution will be an irrational number. Explain why the result of your

asked by someone unknown on November 7, 2012
5. Chemistry 32

HCI (aq) is a strong acid. suppose you dissolved 0.0365 grams of HCI in water to give a final volume of 10.0 mL. what is the pH of this final solution. The molar mass of HCU is 36.5g /mole and the molar mass of water is 18.0g/mole

asked by jen on March 12, 2014
6. Chemistry

Consider the process where 1.3 moles of ice, initially at -30.0 C, is heated to 140.0 C at constant pressure of 1.00 atm. The molar heat capacities (Cp) for solid, liquid, and gaseous water (37.5 J K-1 mol-1, 75.3 J K-1 mol-1, 36.4 J K-1 mol-1,

asked by Bryan Josten on January 30, 2014
7. Chemistry

Consider the process where 1.3 moles of ice, initially at -30.0 C, is heated to 140.0 C at constant pressure of 1.00 atm. The molar heat capacities (Cp) for solid, liquid, and gaseous water (37.5 J K-1 mol-1, 75.3 J K-1 mol-1, 36.4 J K-1 mol-1,

asked by Bryan Josten on January 31, 2014
8. math

The length of a side of a square is fifteen less than four times the length of a side of a second square. The perimeter of the two squares differ by 24 inches. Find in inches, the length of a side of the smaller square. [ Only an algebraic solution will be

asked by vincent on July 27, 2013
9. Calculus

Find the point on the line 6x + y = 9 that is closest to the point (-3,1). Solution: We need to minimize the function d = sqrt((x − (−3))^2 + (y − 1)^2) = sqrt((x + 3)^2 + (y − 1) ^2 ) and, since the point (x, y) lies on the line 6x + y = 9, we can

asked by Manny on December 9, 2009
10. chemistry

6.25 L of a propanoic acid-propanoate buffer must be prepared. The pH of the buffer needs to be 5.05. The solution will be 0.120M in propanoic acid. If the propanoate ion comes from the strontium propionate Sr(C3H5O2)2 then how many grams of strontium

asked by Studious on March 1, 2013
11. chemistry

When the reaction is run in a buffer solution, however, it is pseudo-first-order in CH3I. rate = k[CH3] What is the half-life of this reaction in a pH 10.00 buffer if the pseudo-first-order rate constant for this reaction is 7.3 x10-9 s-1?

asked by anglo on June 5, 2009
12. Chemistry

The boiling point of pure water in Winter Park, CO ( elev. 9000 ft) is 94 oC. What is the boiling point of a solution containing 11.3 g of glucose (180 g/mol) in 55 mL of water in Winter Park? Kb for water = 0.512°C/m.

asked by JPR on October 11, 2015
13. chemistry equilibrium

In a 0.10 M solution of glutaric acid, HO2C(CH2)3CO2H (K1 = 4.6 ´ 10-5, K2 = 3.9 ´ 10-6), the species present in the next to highest concentration is A. H3O+(aq). B. HO2C(CH2)3CO2H(aq). C. HO2C(CH2)3COO-(aq). D. -O2C(CH2)3COO-(aq). E. OH-(aq).

asked by jake on June 20, 2010
14. chemistry

What is the molarity of a solution 12.5 naoh dissolved in total volume of 625ml? NaOH = 12.5/molar mass of NaOH = 12.5/39.99 = 0.313 molarity = no.of moles/volume in L = 0.313/0.625 = 0.501 moles/L

asked by sarah on April 13, 2015
15. Trigonometry (Law of Sine)

Fire towers A and B are located 10 miles apart. They use the direction of the other tower as 0°. Rangers at fire tower A spots a fire at 42°, and rangers at fire tower B spot the same fire at 64°. How far from tower A is the fire to the nearest tenth of

asked by Alianne on February 25, 2012
16. ENG 101

Im taking my first college class in ENG 101 and i need to write an persuasive essay and Im having a hard time. I was wondering if anyone can help me come up with an outline or what I reasons that I can provide and I can come up with minor details. Here is

asked by Jillian on December 2, 2011
17. Science

You may have to decide a second theme be sure to show a variety of examples (plant, animal, and other kingdoms) from a variety of smaller habitats within your ecosystem. explain how your examples fit the extreme theme. this is ecology. Thank you for using

asked by Nikki on January 8, 2007
18. chemistry 116

The thermite reaction demonstrated in class requires high temperatures to start the reaction. A simple open flame is not enough to start the reaction. Once the reaction is going, then it generates enough heat to keep the reaction going. According to the

asked by danny on January 28, 2015
19. Project Management

you are to prepare a network diagram using the Activity on the Arrow technique. You must use as many concurrent activities as you can and you must show the critical path. (A network diagram with no concurrent activities will result in no grade points being

asked by Courtney on June 19, 2009
20. chemistry(check my work)

If 6.01 g of K2SO3 dissolved in 930 mL of water reacts stoichiometrically according to the balanced equation in a reaction solution with a total volume of 990 mL, what is the molarity (M) of KCl produced? K2SO3(aq) + 2 HCl(aq) → SO2(g) + 2KCl(aq) +

asked by eng on April 3, 2010
21. physics

A flock of ducks is trying to migrate south for the winter, but they keep being blown off course by a wind blowing from the west at 6.0m/s. A wise elder duck finally realizes that the solution is to fly at an angle to the wind. If the ducks can fly at

asked by Angela on October 11, 2009
22. chemistry

Chloroacetic acid has a relatively large equilibrium constant, so at low acid concentrations it is necessary to use the quadratic equation in order to calculate the concentrations of the aqueous species. Ka for ClCH2COOH is 1.4 ´ 10-3. For the problems

asked by khin on May 13, 2010
23. classroom instruction

• Write a 200- to 300-word response describing how you might teach this concept to students in a lower elementary grade and to students in a middle school grade. i picked problem solving i have this so far. i guess for each grade level (elem and middle

asked by scooby on March 19, 2010
24. chemistry

A common way of producing hydrogen gas in the lab is by reacting zinc with hydrochloric acid. Zn (s) + 2 HCl (aq) -> ZnCl2 (aq) + H2 (g) A sample of impure zinc, of mass 5.10g, reacted with an excess of hydrochloric acid solution 3.0 mol dm-3

asked by Lois on November 17, 2016
25. essay info help

i'm doing an argument essay on why power plants should be shut down my college is like ten miles away from this power plant so it a very big issue in my town and i want to argue against power plants. i wrote down all my arguements, but i need help coming

asked by julie on October 30, 2007
26. Algebra

The Occupational Safety and health Administration (OSHA) estblished permissible sound exposures in the work-place. This is modeled by the equation: S=-2.817H + 108.9 Use the formula for the problem: S=maximun permissible sound level in decibels H=number of

asked by G on February 8, 2008
27. History

Marcus Whitman chose a site among the cayuse, for from the Nez Perce who requested his services. Analyze how Marcus Whitman's selection of the Waiilatpu mission site revealed something of his character and future work? Explain Explain how settlers

asked by rosalin on June 5, 2018
28. Algebra

The Occupational Safety and health Administration (OSHA) estblished permissible sound exposures in the work-place. This is modeled by the equation: S=-2.817H + 108.9 Use the formula for the problem: S=maximun permissible sound level in decibels H=number of

asked by G on February 8, 2008
29. Chemical thermodynamics

An iron balls is drop into a congrats floor from a height of 10m. On the first rebouce it rises to 0.5m. Assume that all the macroscopic mechanical energy lost in cotillion with the floor goes into the ball and that specific heat capacity of is

asked by Kunoun on July 21, 2017
30. Phyics

The radius of Earth is 6.37 103 km. Find the speed, in km/h, resulting from the rotation of Earth, of a person standing on the equator. v=2(pi)(r)/T v=2(pi)(6.37e3)/24 v=1.67e3 km/h how would you convert this to m/s. it does not seem to be working for me

asked by Jayd on August 16, 2007
31. Physics

A 56.6kg hiker starts at an elevation of 1270m and climbs to the top of a 2660 peak. (I know the answers to B and C, I just have a question on A) A) What is the change in the hikers potential energy? I took PE=mg(h2-h1) and got

asked by Elisabeth on June 5, 2010
32. science

the question says assume the valencies of hydrogen, nitrogen and carbon in the compounds are 1, 3 and 4 from this i must draw a structural formulae for hydrogen cyanide and cyanogen that are consistant with these valencies. please help H : C::: N: Does

asked by Mark jones on February 27, 2007
33. Art

Please check my work i am in connecus and i can’t add in the pictures but if possible can someone check this. This picture is called “ the wounded foot” and it’s by Joaquin sorolla y Bastida and I really hope someone can check this answer thanks In

asked by Maria on December 7, 2017
34. ENGLISH-COM 155

Do I have five adverbs and five adjectioves in this paragraph? When I got my first white car, I was very excited! My mother and father often feared that I would default on my loan, which I did. I was not very experienced, and did not do my homework like I

asked by Mariah Adams on August 17, 2011
35. Probability.

Sorry for posting so many topics, but I really need help on this stuff. I recently lost my work I did on a separate sheet from 2 weeks ago, and now I can't seem to find the answer again. a fair six-sided die is tossed seven times in a row. A) What is the

asked by Tom on May 22, 2008
36. Test tomm. Need help *Urgent*

Sorry for posting so many topics, but I really need help on this stuff. I recently lost my work I did on a separate sheet from 2 weeks ago, and now I can't seem to find the answer again. a fair six-sided die is tossed seven times in a row. A) What is the

asked by Tom on May 21, 2008
37. Statistics

If someone will explain how to work these problems out, that'll help me a ton! A weight loss program claims their patients loose an average of 3 pounds during the first month of the program but a consumer group believes the number is higher than that. A

asked by lviiii on May 10, 2016
38. Math

Can you check my work Please? Let N(t) be the number of bacteria after t days. Then N(t) = Pa^t for some constants P and a. Measurements indicate that N(4) = 5600 and N(8) = 362, 000 1. Write down the formula for N(t) using the rounded values of a and P.

asked by Walt on February 14, 2012
39. english

was given an assignment to write a paragraph essay about the short story"'the sniper''. And Ialready started and i want you to check my work if am on the right track.I started by writing my general statement. iNTHE SHORT STORY ''tHE SNIPER'' the author

asked by sewa on February 15, 2011
40. english

was given an assignment to write a paragraph essay about the short story"'the sniper''. And Ialready started and i want you to check my work if am on the right track.I started by writing my general statement. iNTHE SHORT STORY ''tHE SNIPER'' the author

asked by sewa on February 15, 2011
41. Easy (yet confusing) Algebra

These problems are pretty easy, but confusing (as stated in the subject line). |2x+5|-x=10 |3x+4|-2x=11 I know there are supposed to be two answers for each problem, for the first problem I got 5 and for the second problem I got 7. I can't figure out the

asked by Emily on April 11, 2007
42. Scienece

A student crystallized a compound from benzene and observed only a few crystals when the solution cooled to room temperature. To increase the yield of crystals, the students chilled the mixture in an ice-water bath. The chilling greatly increased the

asked by Josaff on September 26, 2015
43. Chemistry

• A student crystallized a compound from benzene and observed only a few crystals when the solution cooled to room temperature. To increase the yield of crystals, the students chilled the mixture in an ice-water bath. The chilling greatly increased the

asked by david on September 20, 2012
44. algebra

Company makes tire rims. Estimates the the profit, P, of selling x tire rims is given by: P= -0.01x^2 + 8x + 1500 Plugging in 1000 for P and solving, I get 400. Is that correct? b) find the number of rims that must be sold to maximize profit. plugging in

asked by Nabil on October 11, 2011
45. phys

a 5 kg concrete block accelerates down a 34 degree slope at 4.2m/s^2. Find the coefficient of friction between the block and the slope. The net force along the slope that produces the acceleration is F = M g sin 34 - u M g cos 34 = M a where u is the

asked by slien on June 19, 2006
46. physics

You are riding your bicycle directly away from a stationary source of sound and hear a frequency that is 2.5% lower than the emitted frequency. The speed of sound at the temperature that day is 339 m/s. What is your speed? f = f0(v + vo)/v. Here, vo is the

asked by Coreen on April 30, 2007
47. Probability (Pre-Calculus)

A class is given a list of eight study problems from which five will be part of an upcoming exam. If a given student knows how to solve six of these problems, find the probability that the student will be able to answer: (a) all five questions on the exam.

asked by Hailey on March 25, 2010
48. 6th grade math

Just wondering if you could check my answer to this question. Tell whether problem can be solved by using GCF or LCM. Then solve. Sean has 8inch pieces of toy train track and Ruth has 18 inch pieces of train track. How many of each piece would each child

asked by Alex on September 9, 2013
49. Physics HELP!

At what minimum speed must a roller coaster be traveling when upside down at the top of a circle if the passengers are not to fall out? I'm having trouble understanding what it means by minimum speed. I know that at the top there are two forces, the force

asked by James on December 25, 2010
50. Algebra- is my answer right

Charlie is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A charges \$127 and allows unlimited mileage. Company B has an initial fee of \$55.00 and charges an additional \$0.90 for

asked by Rachal on February 5, 2011
51. Physics

An object with a mass of 12 kg slides 9 meters across a horizontal surface with a coefficient of kinetic friction of 0.22. For the duration of the slide an external force, F1, with a magnitude of 43 Newtons acts on the mass in the positive y direction

asked by Chelsea on October 31, 2012
52. Physics

A 56.5kg, 2.4m uniform ladder leans against a frictionless wall. A 95.5kg person is standing up 0.8m from the bottom of the ladder. The ladder makes an angle of 57 degrees with the horizontal. The coefficient of static friction between th eladder and the

asked by James on December 14, 2015
53. Physics

bob drop a rock from a height of 4.5 m. (the acceleration due to gravity is 9.8 m/s^2) 1.at s the initial speed of the rock 2. how long is the rock falling before it hits the ground c. what is the final speed of the rock? [I have trouble with c) My work:

asked by Ash on December 1, 2014
54. Physics

An object with a mass of 12 kg slides 9 meters across a horizontal surface with a coefficient of kinetic friction of 0.22. For the duration of the slide an external force, F1, with a magnitude of 43 Newtons acts on the mass in the positive y direction

asked by Chelsea on October 31, 2012
55. accounting

my question is if my work enviornment is consider working in a school. 1. Would this organization be considered a sole proprietorship, partnership, or corporation? My answer: I feel that it would be a corporations because it is dealing with the school

asked by student ac on October 17, 2007
56. Excel

I have to create a payroll document for class using Excel and I am quite confused. Here is the parts that I am confused on. -I have to calculate the number of years the employees have been working for us, I believe the function I need to use is TODAY() but

asked by Amanda on October 31, 2007
57. statistics

(Quiz 240 ) Stratified Sampling: The owner of a private food store is concerned about employee morale. She decides to survey the mangers and hourly employees to see if she can learn about work environment and job satisfaction. From the list of workers at

asked by mary on March 26, 2012
58. math lit

The price of a apple increase from R2,40 to R3,72. What is the percentage increase in the price of the apple?? If an exam is 2 and a half hours long and its out of a total of 100 marks A)how many mintutes do you have in whic to complete the paper?? B) at

asked by Khabo on March 13, 2012
59. english 4 AP

I have an essay due and I cannot really understand the topic im supposed to write about. Its about the novel "sense and sensibility" Many plays and novels that focus upon the courtship or marriage of a man and a woman include a second pair who help to

asked by kaliegh on February 22, 2013

An object with a mass of 13 kg slides 5 meters across a horizontal surface with a coefficient of kinetic friction of 0.38. For the duration of the slide an external force, F1, acts on the mass in the positive y direction while another force, F2, has a

asked by Amanda on October 27, 2011
61. CHEMISTRY

The enthalpy of solution of nitrous oxide (N2O) in water is -12 kJ/mol and its solubility at 20 oC and 1.00 atm is 0.121 g per 100. g of water. Calculate the molal solubility of nitrous oxide in water at 1.600 atm and 20 oC. Hint, first find Henry's law

asked by Raoul on May 4, 2014
62. CHEMISTRY

The enthalpy of solution of nitrous oxide (N2O) in water is -12 kJ/mol and its solubility at 20 oC and 1.00 atm is 0.121 g per 100. g of water. Calculate the molal solubility of nitrous oxide in water at 1.600 atm and 20 oC. Hint, first find Henry's law

asked by Raoul on May 4, 2014
63. chemistry

A bottle of rubbing alcohol (C3H7OH) from the store is a 70% solution by mass. Determine the total vapor pressure inside the closed bottle. The vapor pressure of the water at room temperature is 24mmHg; the vapor pressure of the volatile rubbing alcohol is

asked by billy bob j on April 17, 2008
64. chemistry

The enthalpy of solution of nitrous oxide (N2O) in water is -12 kJ/mol and its solubility at 20 oC and 1.00 atm is 0.121 g per 100. g of water. Calculate the molal solubility of nitrous oxide in water at 1.600 atm and 20 oC. Hint, first find Henry's law

asked by Raoul on May 3, 2014
65. Chemistry

The molal boiling-point constant for water is 0.51 degrees C/molal. The boiling point of a 1.00 molal solution of Ca(NO3)2 should be increased by: A.) exactly 1.53 or B.) Somewhat less than 1.53 This is how I worked the problem: Ca(NO3)2 dislocates into 3

asked by Marcus on February 21, 2013
66. Chemistry

How would you solve this problem? C4H8(g)--> 2C2H4 Determine the order of the reaction and the rate constant based on the following pressures, which were recorded when the reaction was carried out 430 C in a constant volume vessel. Time (s) P(C4H8)(mmHg) 0

asked by Jane on July 17, 2010
67. Chemistry

Consider the titration of 80.0 mL Ba(OH)2 by 0.400 M HCl. Calculate the pH of the resulting solution after the following volumes of HCl have been added. a.) 0.0 mL *Which molecular equation do I use? b.) 20.0mL Ba(OH)2__+2HCl_+=>+_BaCl2_+____2HOH 80.0

asked by Summer on January 10, 2012
68. math

a liscence plate for a car must consist of a letter followed by two numbers. Each letter mus be an R, U or N. Each number must be a 2 or 6. Repetition of digits is permitted. Use the counting principle to determine the number of points in the sample.

asked by Joyce on June 12, 2011
69. chemistry

Fe(s) + Cu^2+(aq)--> Fe^2+(aq) +Cu(s)(1) 2Fe(s) + 3Cu^2+(aq)--> 2Fe^3+(aq) +3Cu(s) (2) suppose that you use 1.110 g of Iron in this experiment what is the minimum volume of 1.0M of copper sulfate solution that you should add? Hint: since you don't know

asked by cindy on September 17, 2007
70. Chemistry

Preperation of a standard solution of sodium carbonate and titration for the equation between hydrchloric acid and sodium carbonate How can i explain the key features of the periodic table relate to the conclusions of the above experiment, i need to

asked by Paul on October 9, 2010
71. SCIENCe

1.name the componets of the respiratory system in the order incoming encounter them during breathing. 1.trachea,pharynx,larynx,alveoli,bronchi 2.bronchi,larynx,alveoli,trachea,pharynx 3.larynx,trachea,bronchi,pharynx,alveoli

asked by Masey on December 12, 2017

Using the average daily balance method and the information​ given, find the credit card finance charge for the month of August​ (31 days). The annual interest rate is​ 18%. July 31st (Balance) \$590 August 5 (Charge) \$90 August 9 (Payment)\$560 August

asked by Derek on February 18, 2017
73. MATH (POST 2) Need Help Please

Using the average daily balance method and the information​ given, find the credit card finance charge for the month of August​ (31 days). The annual interest rate is​ 18%. July 31st (Balance) \$590 August 5 (Charge) \$90 August 9 (Payment)\$560 August

asked by Derek on February 18, 2017
74. chemistry

Zinc combines with hydrochloric acid to form aqueous zinc chloride and hydrogen gas.  If 300.0 mL of a 0.150  M solution of HCl is allowed to react with excess zinc, how many moles of hydrogen gas would be produced? Part two: if this reaction happens at

asked by Anonymous on March 6, 2012
75. 4th grade math

I have to make a table or list to solve these problems. 1. Tina and Bruce are each rolling a 1 to 6 number cube. They are looking for different ways to roll two factors whose product is greater than 14. How many different ways will they find? 2. Trenton

asked by Danny on September 10, 2013
76. Chemistry

My mind is bleeding again. I am trying to figure out the molarity of acetic acid in Vinegar. We used a standard solution of .613 Molars of NaOH. We added 33.75mL of NaOH to completely titrate/neutralize 25mL of Vinegar and we're supposed to be able to

asked by Casey on June 22, 2010
77. Chemistry

What is the pH of a solution that is .060M in potassium propionic and .085M in propionic acid? Ka=1.3E-5 for the acid. The answer is +4.73 but I don't know how to go about the problem. I thought that the potassium propionic was reacting with the acid to

asked by Jonah on March 21, 2013
78. chemistry

Ethanol was used in the solutions to help dissolve the acetylsalicylic acid. Ethanol is slightly acidic, and will react with NaOH. Describe a blank correction experiment; i.e., what experiment you might do to determine how much NaOH reacts with the ethanol

asked by Anonymous on January 8, 2011
79. chemistry

When weighing liquid ethanol, why do you have to place water in the beaker prior to adding the ethanol to that same beaker? We were told to make a to make a 0.40% (wt/vol) stock solution by weighing 400 mg of absolute ethanol into a tared beaker that

asked by Anonymous on November 25, 2013
80. chemistry

calculate the freezing point of a solution of a 3.46g of a compound, X, in 160g of benzene. when a separate of X was vaporised, its density was found to be 3.27g/L at 116 degree Celsius and 773 torr. The freezing point of pure benzene is 5.45 degree

asked by Temsgen on November 20, 2018
81. PHYSIC

125 g of dry ice (solid CO2) is dropped into a beaker containing 500 g of 66°C water. The dry ice converts directly to gas, leaving the solution. When the dry ice is gone, the final temperature of the water is 29°C. What is the heat of vaporization of

asked by SERA on August 14, 2015
82. Math Help or I fail

1. What is the solution to negative Start Root 75 End Root to the nearest integer? (1 point) 9 8 -8 - My answer -9 2. Shelly sews a blanket that has an area of 170 square feet. It has 30 square blocks, each the same size. What is the approximate length of

asked by Apple Pause on October 29, 2018
83. Chemistry

Buffer capacity is a measure of a buffer solution\'s resistance to changes in pH as strong acid or base is added. Suppose that you have 165 mL of a buffer that is 0.360 M in both benzoic acid (C6H5COOH) and its conjugate base (C6H5COO–). Calculate the

asked by Brody on November 17, 2013
84. Chemistry

Buffer capacity is a measure of a buffer solution\'s resistance to changes in pH as strong acid or base is added. Suppose that you have 165 mL of a buffer that is 0.360 M in both benzoic acid (C6H5COOH) and its conjugate base (C6H5COO–). Calculate the

asked by Brody on November 17, 2013
85. Physics

If a projectile is fired straight up at a speed of 10 m/s, the total time to return to its starting position is about ? -Hfinal=hinitial+ vinitial*t -4.9t^2 0=0+10t-4.9t^2 when I solved for t I got .49t.Am I suppose to plug .49t back into the equation? A

asked by Jess on September 9, 2007
86. Chem Problem

I need help solving this question, I have no idea what I'm supposed to do. What is the minimum pressure in kPa that must be applied at 25 °C to obtain pure water by reverse osmosis from water that is 0.165 M in sodium chloride and 0.029 M in magnesium

asked by Student on March 1, 2013
87. Physics

After school you have been working on your slingshotmanship. Interested in the physics of the slingshot, you take data that compares the force of the extended slingshot versus the displacement from equilibrium. You think this graph is very similar to that

asked by Anonymous on December 1, 2016
88. Chem Problem

I need help solving this question, I have no idea what I'm supposed to do. What is the minimum pressure in kPa that must be applied at 25 °C to obtain pure water by reverse osmosis from water that is 0.165 M in sodium chloride and 0.029 M in magnesium

asked by Student on March 1, 2013
89. Physics

I am really confused on the steps to solve this problem. This is my first time taking physics. The much needed help, would be strongly appreciated. a) Calculate the centripetal force exerted on a vehicle of mass m = 1630 kg that is moving at a speed of

asked by Carlos on October 21, 2014
90. Chemistry

At a certain temperature, the solubility of gas in water at 2.04 is 48.0 . Calculate the solubility of gas in water, at the same temperature, if the partial pressure of gas over the solution is increased from 2.04 to 6.00 .

asked by Sam on February 8, 2013
91. chemistry hw question

Magnesium hydroxide + hydrogen chloride-----> magnesium chloride + water How many grams of magnesium chloride can be produced from 14.60 mL of a 0.546M hydrogen chloride solution?

asked by danielle on February 5, 2012
92. English Ms. Sue

How would I explain my reason fear can cause war because they might believe their is no other solution? How would I explain my reason fear can cause war because people naturally have an instinct to predict themselves with fear?

asked by Michele on February 9, 2009
93. science

the solubility of sodium chloride in water at 10 degrees C is 32 g in 100 g of water. If 14 g of sodium chloride are dissolved in 50 g of water at 10 degrees, the solution is ___________.

asked by ciarra on May 19, 2011
94. Math

A Woman has cat's and birds. When asked how many of each she has she answers... " I have between both cats and birds 400 feet and 232 eyes.(Cats have 4 feet and Birds have 2 feet) How Many Total? How many Birds? How many Cats? Please help me solve this.

asked by Michelle on September 21, 2011
95. English

Please check my answer. I'm not sure which is right because I'm pretty sure every father feels the need to do all of the below. Read the following sentence from "No Dogs Bark." "I'll get you to Tonaya. There I'll find somebody to take care of you. They say

asked by jaycee on September 15, 2014
96. SS help

In a traditional economy, how are economic decisions made? * 1 point custom and habit**** government leaders consumers and planners combination of consumers and planners 2. In a command economy, how are economic decisions made? * 1 point combination of

asked by Haley on October 5, 2017
97. Criminal Justice/White Collar Crime

Excessive billing can take several forms. What are retainers? A. Patients paying directly for services such as calls, refills, and conferences that Medicare considers covered. B. Contracts for services that exceed Medicare limits. C. Up-front fees for

asked by Pat on September 26, 2015
98. Physics

A hot-air balloonist, rising vertically with a constant velocity of magnitude v = 5.00 m/s, releases a sandbag at an instant when the balloon is a height h = 40.0 m above the ground. After it is released, the sandbag is in free fall. For the questions that

asked by Karla on September 13, 2007
99. Physics 1

A hot-air balloonist, rising vertically with a constant velocity of magnitude v = 5.00 m/s, releases a sandbag at an instant when the balloon is a height h = 40.0 m above the ground. After it is released, the sandbag is in free fall. For the questions that

asked by Douchan on September 13, 2007
100. Physics

James and Steve have a contest to see who can kick a football further. James kicks the football at an angle up of 57 degrees, and a speed of 75m/s. Steve kicks the ball with a speed of 100m/s, at an angle up of 48 degrees? Who wins the contest? Please show

asked by Molly on June 21, 2011