# 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 758
1. ## Algebra 1

the temperature at noon in los angeles on a summer day was 88 degrees fahrenheit. during the day, the temperature varies from this by as much as 7.5 degrees fahrenheit. write and solve an absolute-value inequality to find the range of possible temperature

asked by Katie on September 11, 2014
2. ## Math HURRY !!!!!!!!

These 3 questions are very confusing can some plz tell me how to solve them 1) What percent of 9 is 4? 2) What percent of 25 is 10? 3) What percent of 40 is 12? THANKS FOR HELPING!!! 1)44% 2)40% 3)30% thanks but how did u get the answer did u multiply or

asked by rebecca on January 9, 2007
3. ## math problem

please help me solve The oven temperature will increase by 45 degrees Fahrenheit per minute. When the oven is initially turned on, the temperature is 70 degrees Fahrenheit. What will the temperature of the oven be after 7 minutes? Write an expression and

asked by Lavern on November 21, 2011
4. ## Chemistry=MOLES!

I'm having trouble converting moles to grams and finding the mass of molecules. Problems I'm stuck on: What is the mass in grams of .99x10^49 Sodium Chloride Molecules? and How many moles of Cu are in 9.61 grams? and How many moles are in 5.94x10^45 Ne

asked by Justin on January 1, 2008
5. ## science(physics)

Thank you very much for your help--I'm having trouble with this problem: what do i do? There are three point charges along the x axis: -4nC(0.5m left of y axis) 5nC(at origin) 3nC(0.8 right of y axis) I have to say what the electric field is at the point

asked by APPRECIATIVE STUDENT on January 20, 2011
6. ## Math

The diagram below represents black and white floor tiles at a size of five by five. If you add to this pattern to make it six by six, how many black tiles would you add to the existing pattern? I don't know how to solve it, at first I guessed 12 black

asked by Meep on September 26, 2013
7. ## Quantitative Reasoning (math)

One out of every five people who buys ice cream buy vanilla ice cream. If a store sells 125 ice cream cones in one day, about how many will be vanilla? I know how to solve the proportion once I set it up, but I cant figure out how to set it up

asked by Heather on September 10, 2014
8. ## Environmental science

33. Using two or three well-developed paragraphs, write the names of the six kingdoms of organisms. Identify several characteristics of each kingdom. -Most organisms are classified into six kingdoms, which are: Archaebacteria, Eubacteria, Fungi, Protists,

asked by y912f on January 12, 2010
9. ## English

Let's play the word game with slides. This is Team 1 and this is Team two. You should pick an item and I will click on the picture. Then you have to solve the problem. According to the score with the problem, you will get the point. I will give you a small

asked by rfvv on May 27, 2012
10. ## trig/math

3. Draw vectors u and v tail-to-tail so that they make a è-degree angle. Draw the vector u − v, the third side of the triangle, and check to see that it points in the right direction. (a) Solve for cos è using the SSS version of the Law of Cosines,

asked by sarah on April 18, 2010
11. ## Health Care

I am need of some help with this; Employees from the billing department are not receiving the accurate codes and information needed for data entry,slowing production and payment for the doctor. As head of the billing department, you have been delegated to

asked by Anonymous on July 2, 2008
12. ## HCA 230

Employees from the billing dept. are not receiving the accurate codes and information needed for data entry, slowing prodcution and payment for the doctors. As head of the billing department,you have been delegated to lead a problem-solving team to resolve

asked by Friend on October 14, 2009
13. ## Math

Solve the following problem taken from Treviso Arithmetic, a math textbook published in 1478 by an unknown Italian author: A man finds a purse with an unknown number of ducats in it. After he spends 1/4, 1/5 and 1/6 of the amount, 9 ducats remain. It is

asked by Josh on November 16, 2007
14. ## Physics

(b) Given that Icm = ½MR2 for a uniform solid wheel, (i) show that the rotational kinetic energy is half the translational kinetic energy for such a wheel. (ii) For the wheel of diameter 10 cm, find its final speed after traversing a distance of 10 m down

asked by Oisin on July 20, 2010

Roger visted a ski and snowboard shop the other day to buy a new snowboard. The store said it was having a sale, today only. 20% off all new 2016 Burton Snowboards. Usually these snowboards cost \$300 when they're not on sale. Roger told his friend John

asked by Jerry on April 26, 2017
16. ## Chemistry

Given a saturated solution of CaF2, write the ionic equilibrium and use it to calculate the solubility of CaF2. My answer for the ionic equation is CaF2(s)Ca2+(aq)+ 2F-(aq) Ksp= [Ca2+][F-]2 the given ksp is 3.32*10-4 how do i figure out the solubility?? i

asked by Maggy on October 29, 2012
17. ## chemistry

when ammonia is added to Zn(NO3)2 solution, a white precipitate forms, which dissolves on the addition of excess ammonia. But when ammonia is added to a mixture of Zn(NO3)2 and NH4NO3, no precipitate forms at any time. Suggest an explanation for this

asked by Ana on April 2, 2011
18. ## Chemistry

From the jewelry descriptions given, select the homogeneous mixture or solution. Answer?? 10 carat (K) electroplated gold jewelry 24 carat (K) gold jewelry (i know this is pure gold) 18 carat (K) gold jewelry Are these right? CaCl2>>calcium chloride

asked by Lucky on January 28, 2013
19. ## chemistry

A 13.03 g sample contains only ethylene glycol (C2H6O2) and propylene glycol (C3H8O2). When the sample is added to 100.0g of pure water, the resulting solution has a freezing point of -3.5C. What is the percent composition of ethylene glycol and propylene

asked by Monique on November 6, 2011
20. ## chemistry

From the jewelry descriptions given, select the homogeneous mixture or solution. Answer?? 10 carat (K) electroplated gold jewelry 24 carat (K) gold jewelry (i know this is pure gold) 18 carat (K) gold jewelry Are these right? CaCl2>>calcium chloride

asked by Lucky on January 28, 2013
21. ## PHYSICS

A crate of potatoes of mass 23.0 kg is on a ramp with angle of incline 30° to the horizontal. The coefficients of friction are μs = 0.65 and μk = 0.44. Find the frictional force (magnitude and direction) on the crate if the crate is at rest. Please help

asked by Shereen on September 25, 2011
22. ## Chemistry

A sample of 1.029g of KC8H5O4 was titrated with an NAOH solution of unknown concentration. If 22.83 mL of base was used to reach the endpoint, what was the concentration of NaOH? What mass of KC8H5O4 should be used such that a volume of NaOH between 35-40

asked by Matt on November 1, 2007
23. ## Chemistry

The solubility of CaSO4 is 0.209 g/100 mL of water at 30 degrees celsius. if 0.500 g CaSO4 is stirred overnight at 30 Degrees Celsius with 100.0 mL of water, a. How many grams of CaSO4 remain undissolved? b. Calculate the molarity of CaSO44 in solution

asked by Anne on October 25, 2012
24. ## chemistry

Sulphuric acid (H2SO4) solution reacts with magnesium metal (Mg) to magnesium sulphate and hydrogen according to: H2SO4 + Mg → MgSO4 + H2 How many litres of 5.00 M sulphuric acid would be required to dissolve 20.00 g of magnesium and how many mol of

asked by John on June 22, 2014
25. ## Chemistry I

In determining the heat capacity of a calorimeter, 50ml of water at 56*C is added to 50ml of water at 23*C. After about five minutes of mixing, the final temperature of the solution inside the calorimeter reached 37*C. Calculate the heat capacity of the

asked by Josh on October 22, 2012

Leland wants to paint a portrait for his parents using a photograph of them that is 5 inches wide by 8 inches high. He wants the portrait to be proportional to the photograph and 42 inches high. Which proportion can Leland use to find w, the width he needs

asked by Mark on December 11, 2014
27. ## pre-algebra

measuring your heart rate is one way to check the intensity of exercise. studies show that a person's maximum heart rate depends on his or her age. The expression 220-a approximates a person's maximum heart rate in beats per minute, where a is the person's

asked by cortney on August 15, 2011
28. ## Accounting - Tax

Bob (age 40) and Susan (age 39) Cowen are married. Susan works as a retail manager and Rob is a self-employed electrician but does not maintain a home office. Their 2015 tax and other information are as follows: Salary – Susan 75,000 Federal withholding

asked by C on November 16, 2015
29. ## Science

Two Tugboats pull a disabled supertanker. Each tugboat exerts a constant force 1.8x10^6 N, one at 10° west of North and other at 10° east of north, as they pull the tanker 0.50km towards north. The mass of the tanker is 2.20x10^8 kg. What is the total

asked by Majid on February 15, 2016
30. ## Calculus

A cylindrical water tank has radius r=1 meter and height 10 meters. Suppose the tank is lying on its side and is filled halfway with water. How much work does it take to pump all the water out the top of the tank? The height is now 2 meters. Thanks, I'm

asked by Quentin on December 31, 2015
31. ## math word problem

There are 10 women and 8 men in a club. How many different committees of 6 people can be selected from the group if equal numbers of men and women are to be on the committee? I think it would be 2, because half of 6 is 3, so 3 are men and 3 are women. 2

asked by Paula on March 21, 2010
32. ## earth

A satellite 200 miles above the earth is orbiting the earth once every 6 hours. How long, in hours, does it take the satellite to travel 8,400 miles? (Assume the radius of the earth is 4,000 miles.) Give your answer both as an exact value and an

asked by Anonymous on February 20, 2012
33. ## physic

Nora’s car is run out of gas and she noticed that a gas station is just 125 feet away the incline road. She decided to push the car up a 14 degree inclined with a force of 250 N to get to the gas station. Determine how much work is done pushing the car

asked by anis on November 27, 2015
34. ## PHYSICS

A pump is required to lift a mass of 850 of water per minute from a well of depth 14.8 and eject it with a speed of 17.7 . Part A How much work is done per minute in lifting the water? Part B How much in giving the water the kinetic energy it has when

asked by YASER on May 5, 2013
35. ## AP Macroeconomics

Japan, the European Union, Canada, and Mexico have flexible exchange rates. Suppose Japan attracts an increased amount of investment from the European Union. Using a correctly labeled graph of the loanable funds market in Japan, show the effect of the

asked by Macroeconomics on March 28, 2013
36. ## Calculus

I really need help with this problem. A conical vessel is 12 feet across the top and 15 feet deep. If it contains a liquid weighing p lbs/ft^3 (p=62.5 lbs/ft^3)to a depth of 10 feet. Find the work done in pumping the liquid to a height of 3 feet above the

asked by Denise on September 12, 2010
37. ## Maths

A square based pyramid, with a perpendicular height of 15cm I'd placed on a table. The weight of the pyramid is 70.56N. The pyramid exerts a pressure of 4900N/m^2 on the table. Work out the volume of the square based pyramid. Thank you so much.

asked by Jack on April 19, 2017
38. ## math

Explain why the simultaneous equations y=1/2x+2 and 2y-x:4 have an infinite number of solutions. What is diffrent about these equations compared with the equations in the first question ( the equations were y=2x+3 and 5y-10x=5)? What is similar? ( include

asked by CJ on February 24, 2011
39. ## history

i have to do a news article on gaius (caligula) caesar about a big event that happened towards the end of his life. does anyone know a big event that happened towards the end of his life? all i can really find is when he was assassinated and that wont

asked by christina on October 19, 2008
40. ## PHYSICS

The work-energy theorem states that a force acting on a particle as it moves over a ______ changes the ______ energy of the particle. A)distance / potential B)distance / kinetic C)vertical displacement / potential D)none of the above

asked by SHILA on February 13, 2011
41. ## physics

A satellite moves in a circular orbit of radius 35.793 km. The Earth's radius and mass are Re = 6.37e6 m, and Me = 5.97e24 kg. For the satellite, calculate the work done to put the satellite in orbit (mass of satellite is 1000 kg).

asked by tyger2020 on November 28, 2018
42. ## biology

1. how does the density of ice compare to that liquid water and why is that property important to aquatic oranisms a. the density of ice is higher than that liquid water, which means that ice forms from the bottom of lakes upward , protecting aquatic life

43. ## Chemistry

30.0 mL of 0.0200 mol/L NaOH are added to 70.0 mL of 0.0100 mol/L HCI. Calculate the [H3O+] and [OH─] of the resulting solution My answer: [OH-] = 1.00x10^-10 M; [H3O+] = 1.00x10^-4 M Teacher's answer: [OH-] = 1.00x10^-11 M; [H3O+] = 1.00x10^-3 M Am I

asked by Sam on December 1, 2015
44. ## physics

Please help me !!! for solution of this question Water enters a horizontal pipe with a rectangular cross section at a speed of 1.00 m/s. The width of the pipe remains constant but the height decreases. 27.3 m from the entrance, the height is half of what

asked by suzan on April 19, 2014
45. ## Chemistry

Silver ions may be recovered from used photographic fixing solution by precipitating it is as silver chloride. The solubility of silver chloride is 1.6 x10-3 g/L. Calculate the Ksp in __(answer) * 10-10 for silver chloride. Give the answer to one decimal

asked by Deanna on May 28, 2019
46. ## Science 7

There are 2 questions I have posted. My answers are at the bottom. 1.List 2 liquid solutions that do not contain water? 2. Suppose that you add one teaspoon of sugar to your cup of tea. A friend adds four teaspoons of sugar to his cup od tea. Whose tea is

asked by Sarahana on January 7, 2011
47. ## Algebra

Andrew factored the expression 28x^3-42x^2+35x as 7x(4x^2+6x-5). But when Melissa applied the distributive law and multiplied out 7x(4x^2+6x-5) , she got 28x^3+42x^2-35x ; thus, Andrew’s solution does not appear to check. Why is that? Please help Andrew

asked by Natalie on July 25, 2011
48. ## Physics

You have a 30g quarter on an old LP turntable at a radius of 30 cm from the turntable's center. If the coefficient of Friction between the coin and the turntable is 0.6, at what speed will the coin slide off the turntable? Hint: this is a circular motion

asked by Trevor on November 18, 2007
49. ## Math

Andrew factored the expression 28x^3-42x^2+35x as 7x(4x^2+6x-5). But when Melissa applied the distributive law and multiplied out 7x(4x^2+6x-5) , she got 28x^3+42x^2-35x ; thus, Andrew’s solution does not appear to check. Why is that? Please help Andrew

asked by Michael on July 25, 2011
50. ## Chemistry: Potentiometric Anyalysis

If the pH probe was miscalibrated and reports the pH to be 1 unit higher than the true pH of the solution it is in, would the molar mass you report for the solid acid be higher, lower, or equal to the true molar mass of the acid? This for my post lab write

asked by Michelle on April 14, 2015
51. ## chemistry

NH4NO3(s) + H2O(l) NH4NO3(aq) ΔH = +25.7 kJ What is the final temperature in a squeezed cold pack that contains 40.0 g of NH4NO3 dissolved in 125 mL of water? Assume a specific heat of 4.18 J/(g·°C) for the solution, an initial temperature of 25.0°C,

asked by lynn on July 15, 2012
52. ## Advanced Functions - urgent

Consider the function f(x)=x^3-7X^2+6x-1 A. Determine the instantaneous rate of change at the point where x=2 B. Determine the instantaneous rate of change at the point where x=6 C. What special kind of point occurs between the points A and B? Explain. I

asked by Sam on September 27, 2009
53. ## Algebra

the problem is to graph 3x - y < 2 x + y > 2 my solution is y = 3x - 2, y = -1x + 2 I,m lost at where my lines ar drawn. In y = 3x - 2 (y line is 3) and y = -1x +2 (y line is -1) or am I totaly lost. After continued effort I beleive 1st equation m = 3 and

asked by Sissy on May 27, 2007
54. ## chemistry

A solution of sodium bicarbonate is prepared by adding 45.00g of sodium bicarbonate to a 1.00-L volumetric flask and adding distilled water until it reaches the 1.00-L mark. Calculate the concentration of sodium in units of: a) milligrams per liter b)

asked by Maria on January 15, 2011

mrs.sue i never got to put my updated answers from when you said they were wrong so here they are please check them. 5.Mexico City was built by the A.Olmecs, when they began to grow maize. B.Maya, after they conquered the Valley of Mexico. C.Spanish, on

asked by bonn on February 25, 2014
56. ## ICT

Indicate the variables used, draw an IPO chart and write an algorithm to solve the problem. Test your algorithm by doing a trace table. • Enter the number of rows of tables in the city hall as well as the number of Tables per row. • Calculate and

asked by Mr. Louw bought a number of bags at R100. What is on May 10, 2016
57. ## Chemistry

Expressing amounts of energy in different energy units is necessary to solve many chemistry problems. For practice, complete the following table. FILL IN THE BLANKS PLEASE. The Joule (J) is the SI unit of energy. 1 calorie (cal) = 4.184 J J cal kJ 695 ___

asked by Anonymous on July 3, 2017
58. ## physics

25 gram mass is given an upward acceleration of 30 m/s^2 by a rope. need help finding tension in the rope? not sure how to set up the problem?? Tension is the reaction force. Clearly you have two forces in opposite directions. Let T be the tension in the

asked by greg on September 25, 2006
59. ## Financial management

evaluates investment opportunities using payback. The finance director who has been with the company since its formation in 1975, has recently heard that this method may not be the best for evaluating long term projects. You have been brought in to advise

asked by David on November 18, 2008
60. ## msth 117

Take any number (except for 1). Square that number and then subtract one. Divide by one less than your original number. Now subtract your original number. You reached 1 for an answer, didn’t you? How does this number game work?

asked by monkeybaby on March 9, 2010
61. ## physics

A trucker sees the image of a car passing her truck in her diverging rear-view mirror, whose focal length is 60.0 cm. If the car is 1.85 high and 6.75 away, what is the location and height of the image. 1/p + 1/q = 1/f 1/675cm + 1/q = 1/(-60cm) q=-55.1 cm

asked by Anonymous on March 28, 2008

A bottle contains 0.5 quart of grape juice. Keisha will use 0.2 of the grape juice to makie fruit punch. How much grape juice sill Keisha use for the fruit? I chose a.)0.3. My mom says it is b.) 0.2 The teacher's edition says it is c.) 0.1. Can you please

63. ## Maths-Proportions

1) An aircraft flying at 500 km/h completes a journey in 8.4 h. How long would the journey take if it flew at a speed of 420 km/h? 2) Jackie can drive to work in 18 mins if he travels at an average speed of 35 m.p.h. How long will the journey take if she

asked by Sami on August 22, 2015

(-2x^2y)^3*(5xy^3)^2=(-2x^2y)^3 = -8 x^6 y^3 *Please check my work. What did you do with the (5xy^3)^2 part. The first part you did ok. But you can't just throw away part of the equation. I don't get that part.What do I do there.? (5xy^3)^2=25x^2y^6 You

asked by Margie on February 6, 2007
65. ## Math (Calculus)

The function f(x)=-2x^3+10.2x^2+202.275x+0.87 is increasing on the open interval (?,?). It is decreasing on the open interval (-oo,?) and the open interval (?,+oo) The function has a local maximum at ? I used derivative -6x^2+20.4x+202.275 and find the

asked by Anonymous on April 21, 2016
66. ## math

Mr.ariel and mr. Teddy are planning to paint tha house together.mr.arielthinkin that if.he work alone it would take him 5 hours more than the time mr. Teddy takes to paint the the house .working together they can complete the job in 6hours. How long will

asked by miles on August 1, 2016
67. ## College Algebra

Hey, I would love if someone could please look over my answers. I just learned this yesterday and want to make sure I did my hw correct. Thanks!!! Solve for x. Round answers to four decimal places where appropriate: 1. 6^x=6^2x-1 Ans.= x=1 2. 3^x=1/27

asked by Natalie on April 28, 2016
68. ## Psychology

Jennifer is a 29-year-old administrative assistant married to Antonio, an Italian engineer, whom Jennifer met four years earlier while on a business trip for her marketing company. The couple now lives in Nebraska, where Antonio works for the county's

asked by Garcia on July 25, 2010
69. ## Physics Problem; CONVERSIONS

PLEASE HELP ME SOLVE !!!! InMay 1998, forest fires in southernMexico and Guatemala spread smoke all the way to Austin. Those fires consumed forest land at a rate of 26900 acres/week. On the average, how many square meters of forest are burned down every

asked by Anonymous on January 19, 2012
70. ## physics

PLEASE HELP ME SOLVE !!!! InMay 1998, forest fires in southernMexico and Guatemala spread smoke all the way to Austin. Those fires consumed forest land at a rate of 26900 acres/week. On the average, how many square meters of forest are burned down every

asked by Ann on January 20, 2012
71. ## Physics Problem; CONVERSIONS

PLEASE HELP ME SOLVE !!!! InMay 1998, forest fires in southernMexico and Guatemala spread smoke all the way to Austin. Those fires consumed forest land at a rate of 26900 acres/week. On the average, how many square meters of forest are burned down every

asked by Anonymous on January 19, 2012
72. ## algebra

solve for "x": 0.75(8x-24)-4x=-182 6x-18-4x=-182 2x=-182+18 2x=-200 x=-100 Check: 0.75(8x-24)-4x=-182 0.75(-800-24)-400=-182 0.75 (-824)-400=-182 -618-400=-182? What is wrong?

asked by Medina on October 1, 2016
73. ## Math

Suppose you have a friend named Ed. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla, and strawberry. One of Ed’s friends, Stacey, eats chocolate

asked by Terry on October 27, 2009
74. ## Chemistry

Lake Vida is an enormous hypersaline lake that lies under 19 m of ice in the Dry Valleys region of Antartica. The freezing point of the water is approximately -17 C owing to the fact that it is many times as salty as typical saltwater (assume all of the

asked by Konan on October 24, 2010
75. ## ice cream

Suppose you have a friend named Ed. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla, and strawberry. One of Ed’s friends, Stacey, eats chocolate

asked by dan on March 30, 2010
76. ## Chemistry

Lake Vida is an enormous hypersaline lake that lies under 19 m of ice in the Dry Valleys region of Antartica. The freezing point of the water is approximately -17 C owing to the fact that it is many times as salty as typical saltwater (assume all of the

asked by Konan on October 24, 2010
77. ## Chemistry

When 0.702 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 114C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant

asked by Taylor on February 22, 2010
78. ## Chemistry

Balance the following redox reaction occurring in an acidic solution: ClO4^-+Br2=Cl^-+BrO3^- I get the two half reactions balanced as: 6e^-+(8H^+)+ClO4^-=Cl^-+4H2O and 6H2O+Br2=2BrO3^-+(12H^+)+10e^- Then I multiply the top equation by 5 and the bottom

asked by Carol on March 26, 2016
79. ## chem--buffers

Calculate [H30+] in a solution that is 0.0525M HCl and 0.768M NaC2H3O2. Ka(HC2H3O2)= 1.8 x10^-5. the way i did it is that i used the given molar of HCl to find the moles of Hydronium in the acid, and then i used that to find the moles of OH- in it, using

asked by Rav on March 7, 2010
80. ## Chemistry

When 0.655 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 107C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant

asked by eli on February 22, 2010
81. ## chemistry

A 1.0 x 10-2 M solution of a weak acid is found to be 3.7% dissociated. Calculate Ka of this acid. I found the amount dissociated by (amount dissociated/initial conc)*100=3.7 Where do I go from here?

asked by Mahnoor on April 1, 2015
82. ## Chemistry 218

assume all of the ionized aspirin remains in the buffer solution and all of the un-ionized aspirin goes into to the ethyl acetate, what is the molarity of the aspirin in the ethyl acetate at pH 2 and pH 8? what equation would ou use for this?

asked by Rebecca on October 28, 2015
83. ## set (math)

A class of 47 students took examination in algebra and geometry. If 29 passed algebra and 26 passed geometry and 4 failed in both subjects, how many passed both subjects? With solution please, tnx...

asked by HELP HELP HELP MNHS on January 23, 2013
84. ## Chemistry

Molarity of NaOH solution = 0.06115 Volume of NaOH used = 15.50 mL Volume of unknown Sample = 10.00 mL Find the Moles of NaOH used? Find the molarity of H3PO4? Thanks!

asked by Fred on October 10, 2012
85. ## chemistry

assume all of the ionized aspirin remains in the buffer solution and all of the un-ionized aspirin goes into to the ethyl acetate, what is the molarity of the aspirin in the ethyl acetate at pH 2 and pH 8? what equation would ou use for this?

asked by kelly on April 3, 2013
86. ## Chemistry

Consider 125 mL of 0.110 M MgCl2 solution. a. How many moles of MgCl2 are contained in 125 mL of 0.0110 M MgCl2? b. What is the concentration of Mg2+ ion? c. What is the concentration of Cl- ion?

asked by B on April 4, 2011
87. ## chemistry

The relative sweetness of sucralose is 60000. The relative sweetness of sugar is 100. How many grams of sucralose would you need for a solution that has the same sweetness as one made with 2.00g of sugar?

88. ## Chemistry

At 20 degrees C ethanol has a density of 0.789 g/ml and H2O has a density of 1.0 g/ml. What is the % by volume of ethanol of a solution made by adding 50g of ethanol with 50g of H2O?

asked by Shelly on November 28, 2011

At a temperature of 18.0°C of 23.0cm^3 of a certain gas occupies has pressure of 103 kPa. (a) What volume would the gas occupy at a temperature of 0.00°C and pressure of 101kPa? (b) 1.00 moles of a certain gas occupies a volume of 22.4 litres at 0.00°C

asked by Josh on December 4, 2016

At a temperature of 18.0°C of 23.0cm^3 of a certain gas occupies has pressure of 103 kPa. (a) What volume would the gas occupy at a temperature of 0.00°C and pressure of 101kPa? (b) 1.00 moles of a certain gas occupies a volume of 22.4 litres at 0.00°C

asked by Daniel on December 2, 2016

A spaceship lands on a new planet. the crew decides to measure the speed of sound in the planets atmosphere. taking a tube with a length of 50 cm, they find that one resonant frequency occurs at 2,520 Hz, and the next resonant frequency at 2,940 hz. what

asked by Kayla on December 8, 2014
92. ## physics wave

A) Show that the average rate with which energy is transported along a cord by a mechnical wave of frequency f and amplitude D is: P(average) = 2(pi^2)u v(f^2)(D^2) v is speed of the wave u is the mass per unit length (M/L) B) If the cord is under a

asked by Anonymous on May 1, 2008
93. ## science

What happens when a candle is alight (on one side we had to show physical change and on other side the chemical change). The question sheet says 'Explained both changes using the Big Idea of Energy.' The physical changes are what you can see, and what you

asked by liverpool on October 21, 2006

A spaceship lands on a new planet. the crew decides to measure the speed of sound in the planets atmosphere. taking a tube with a length of 50 cm, they find that one resonant frequency occurs at 2,520 Hz, and the next resonant frequency at 2,940 hz. what

asked by Kayla on December 7, 2014
95. ## English (Check)

The title of my project says it all.. Women are most effected by the issues. The women right movement have been going on ever since the 1800’s. The natural rights for women should mean them getting equal pay, getting the same job as a man and women not

asked by C on October 13, 2015
96. ## math Statistics

Hi I need help with Statistics. Can anyone help me to understand it better? I am in fear that if I do not figure this out soon I will fail my class. I am needing help with the chapters 12,and 13. in the book called Statistical Reasoning in the Behavioral

asked by Sara on February 19, 2012
97. ## Algebra

Living in or near a metropolitan area has some advantages. Entertainment opportunities are almost endless in a major city. Events occur almost every night, from sporting events to the symphony. Tickets to these events are not available long and can often

asked by Dez on June 24, 2010
98. ## math algebra

A student walks and jogs to college each day. She averages 5km/h walking and 9km/h jogging. The distance from home to college is 8km and she makes the trip in 1 hour. How far does the student jog. To set up the equation I got: 5(x)+9(8-x)=8 5x+72-9x=8

asked by angela on February 26, 2009
99. ## pre algerbra

susan bought a 6 month \$1,700 certificate of deposit.At the end of six months she received \$63 simple interest. what annual rate of interest did the certificate pay? In a year then it would be 2 times \$63 So \$1700 times the rate of interest (we will call

asked by Kemmaris on May 21, 2007
100. ## college chemistry 4

you and a friend have two flasks, one containing hydrogen gas and the other chlorine gas; you each take one flask and go to opposite sides of the room, 10.0m apart. if you were both to popen your flasks toward each other at the same time, where in the room

asked by Ernesto on August 15, 2012