# 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

91,330 questions, page 669
1. ## Physics Power

1.) How much energy does a 60 W light bulb consume in 1 hour? 2.) Beth pulled her brother (m=85 kg) in a 10 kg sled with a constant force of 95 N for 100 m. a) How much work did Beth do in moving her brother? b) How much power did she expend if it took her

asked by Isis on February 26, 2013
2. ## Foreign languages

I left out the following questions. Thank you. 1) What effect did Poe aim to achieve in moast of his short stories? Which theory did Poe work out in his Philosophy of Composition and who was he inspired by? 2) What are the main feautures of Poe's tales?

asked by John on July 1, 2012
3. ## Applied Geometry

What is the volume of a right triangular pyramid whose base is 3 meters on each side and whose altitude is 4 meters? 4.5 m3 3.9 m3 5.2 m3 Are the possible answers, I calculated 3 square root 3 m3, which simplified was 5.19, so I think it is 5.2m3. Can you

asked by HWKIS on August 13, 2015
4. ## physics

A 25-kg child sits at the top of a 4-meter slide. After sliding down, the child is traveling at 5 m/s. How much PE does he start with? How much KE does he end with? How much energy is lost to friction? if you push a box across the floor with a force of 30

asked by Bella on February 27, 2017
5. ## art

generally, artists change their styles a. offen beacuse of the influence of events that happen in life b. raely beacuse it is confuses the audience. c. their work naturally has the characteristics of the style. d. they chose to join a group of artists

asked by helpthanks on November 20, 2014
6. ## English

Which question should you ask during your third read of the multi-draft reading process? A. Who is the speaker, or the voice that “says” the words of the poem? B. How has the work expanded my ideas—or my imagination? C. What do the word choices and

asked by Anonymous on February 8, 2019
7. ## Chemistry

I've run into some difficulty with my chemistry homework. We went over this practise question in class today as an example. However, I wasn't able to fully grasp how to work it out. "How many grams of nitrogen form when 34.6 grams of nitrogen dioxide

asked by Kara on March 28, 2016
8. ## algebra

6RS +RR4 PQPQ P,Q,R and S represents four different digits. what digit does S represents? (A)1 (B)2 (C)5 (D)6 (E)8 I think the answear is 6 but now sure. Am i correct? How do you figure this problem? The answer is (E)8. The rest of the letters are as

asked by Bryan on November 10, 2006
9. ## Art plz help!!!

A sculpture shows a group of citizens engaged in planting trees in a forest. What cultural norm is communicated in this work? (1 Point) A) valuing creativity B) valuing gratitude C) valuing peace D) valuing the natural world*** My answer

10. ## Consumers Math

I don't want the answer to this question, but if someone could please tell me how to work it out, that would be great and I could finish it on my own. Thank you very much:) Question- Your station charges \$15.95 for an oil change. As a promotion you sell

asked by Cat on May 12, 2014
11. ## geometry

Sam went to the park and saw a work crew putting in a square garden. She found a tape measure that was stretched between opposite corners with a measurement of 171.1 feet and decided to find the area. What is the area of the square in yards?

asked by beck on May 19, 2013
12. ## Physics

no matter how i work it out, i keep getting the wrong answers. please help!!! i only have two more submissions before it closes on me. A sample of blood is placed in a centrifuge of radius 14.0 cm. The mass of a red blood cell is 3.0 x 10^-16 kg, and the

13. ## physics

A 50-kg block is pushed a distance of 5.0 m across a floor by a horizontal force Fp whose magnitude is 150 N. Fp is parallel to the displacement of the block. The coefficient of kinetic friction is 0.25. A) What is the total work done on the block? B) If

asked by Amy on February 13, 2012
14. ## Physics

Know matter how i work it out, i keep getting the wrong answers. please help!!! i only have two more submissions before it closes on me. A sample of blood is placed in a centrifuge of radius 14.0 cm. The mass of a red blood cell is 3.0 ✕ 10−16 kg, and

15. ## Grammar

Determine if the following sentence employ the correct use of commas and apostrophes. True Correct False wrong 1. The girl's mother, a nurse at a local clinic, was called at her work and told of her daughter's injury. Answer: True

asked by Leslie on May 11, 2011
16. ## multiple choice economics

Which law allowed states to pass right-to-work laws? A. Fair Labor and Standards Act of 1938 B. Taft-Hartley Act of 1947 C. Equal Pay Act of 1963 D. Civil Rights Act of 1964 I think its D

asked by Alex on November 19, 2015
17. ## Physics

Know matter how i work it out, i keep getting the wrong answers. please help!!! i only have two more submissions before it closes on me. A sample of blood is placed in a centrifuge of radius 14.0 cm. The mass of a red blood cell is 3.0 x 10^-16 kg, and the

18. ## physics

A 91 kg student eats a 200 Calorie doughnut. To “burn it off”, he decides to climb the steps of a tall building. (1 food Calorie = 10^3 Calories.) How high would he have to climb to expend an equivalent amount of work? The acceleration of gravity is

asked by dillon on January 15, 2014
19. ## Psychology

"I just can't make myself study ahead for a test. I work better under pressure. Perhaps it is the fear associated with waiting until the last minute that gets me going." This approach to motivation is best explained by: (Points: 5) incentive approaches.

asked by Lisa on February 22, 2011
20. ## Physics

Could someone please help walk me through this problem I'm struggling with? Thanks in advance! A brick with mass m1=2.5 kg can move without friction on a horizontal plane. The brick is attached to a wall by an ideal spring with spring constant k=2300 N/m.

asked by Jamie on November 29, 2016
21. ## Physics

Eris, the largest dwarf planet known in the Solar System, has a radius R = 1200 km and an acceleration due to gravity on its surface of magnitude g = 0.77 m/s2. (a) Use these numbers to calculate the escape speed from the surface of Eris. (b) If an object

asked by James on June 29, 2012
22. ## Physics

Consider the figure above consisting of three particles of mass m attached to a massless rod.  Given an axis of rotation through point P, the rod rotates as shown in the figure.  If the rod is released from rest in the horizontal position at t = 0.

asked by Courtney on July 25, 2017
23. ## macroeconomic

Can someone help me with this question pls.. A country has a factory and build two bulldozers at a total cost of \$320. The country also know that due to the miscalculation of demand, the factory had been unable to sell some of its output of baked

asked by sw on March 20, 2007
24. ## math

If 1+2+3+...+200=x, what is (1+2+3+...+200)-(2+4+6+...+200)? (solution pls... tnx)

asked by MNHS_HELP on January 27, 2015
25. ## chemistry

In a buffer solution, if [Aƒ{] < [HA], which of the following must be true? a. pH < pKa b. pH = pKa c. pH > pKa d. pH < 7.00 e. pH > 7.00

asked by miller on November 10, 2010
26. ## Math

Determine the solution of the equetion: 2cos x-1=0? 2cos x=0? and 2cos x+1=0?

asked by Miley on September 8, 2015
27. ## chemistry

If you need 600 mL of a .5 M NaOH solution and 3 M NaOH is provided, how much of the 3 M NaOH will you need?

asked by Brandon on November 3, 2010
28. ## math

wat is the solution to the following equaton? 4(4n + 7) = -20 4(4n + 7)= -20 16n + 28= -20 16n= -20 - 28 16n= -48 n= -48/16 n= -3

asked by jose on February 27, 2007
29. ## math help

5) Consider the equations: f(X)= -6x-1 and g(x)=4x^2 Select the solution for (f+g)(x). a) -6x -1 + 4x^2 b) -24x^3 - 4x^2 c) -24x^2 - 1 d) -6x - 1- 24x^2

asked by Anonymous on March 31, 2013
30. ## Chem

could you tell me if these are right and help me with the other 2 I cant seem to get them to come out. Calculate the pH of each solution given the following [H3O+] or [OH -] values. (a) [H3O+] = 1.5 10-8 M 1.0E-7 is what I got (b) [H3O+] = 5.3 10-6 M (c)

asked by Carrie on December 1, 2010
31. ## RESPONSE to PreCalc

Makes complete sense thank you so much!!! My only question is how come we respect domains only sometimes... For example now sin©¬/cos©¬ = (1/a)/(¡î3/a) = 1/¡î3 tan©¬ = 1/¡î3 ©¬ = 30¨¬ or pi/6 then sin 30¨¬ = 1/a 1/2 = 1/a ---> a = 2 so

asked by Kate on March 1, 2010
32. ## physics college

Use Newton's Law of Gravitation to compute the work W required to propel a 1100 kg satellite out of the earth's gravitational field. You may assume that the earth's mass is 5.981024 kg and is concentrated at its center. Take the radius of the earth to be

asked by lost on May 16, 2012
33. ## Physics

A rock of mass 0.086 kg is thrown upward with an initial speed of 13 m/s. Find the work done by gravity on the rock from the time it leaves the thrower's hand until it reaches the highest point on its trajectory. Hint: You do not have to calculate the

asked by Sierra on July 11, 2012
34. ## physics

The puck in the figure below has a mass of 0.160 kg. Its original distance from the center of rotation is 40.0 cm, and it moves with a speed of 60.0 cm/s. The string is pulled downward 15.0 cm through the hole in the frictionless table. Determine the work

asked by anonymous on December 16, 2012
35. ## medical

paula patient doesn't want her violent boyfriend to know she's getting an abortion, so she asks dr. bob to send all communications to her to a post offfice box and to phone her only at work. what should dr. bob do, and what is the legal basis for your

asked by Anonymous on May 31, 2009
36. ## health information

Paula Patient doesn't want her violent boyfriend to know she's gettin an abortaion, so she asks Dr. Bob to send all communications to her to a post office box and to phone her only at work. What should Dr. Bob do, and what is the legal bases for your

asked by Unknown on April 10, 2009
37. ## Math

An equilateral triangle s divided into 4 congruent equilateral triangles. What method can be used to find the area of the larger equilaterl triangle give the area of one of the smaller triangles? F. Multiply the area of the larger equilateral triangle by 4

asked by Danny on December 7, 2010
38. ## MAC1045

What will be the final temperature of the solution in a coffee cup calorimeter if a 50.00 mL sample of 0.250 M HCl(aq) is added to a 50.00 mL sample of 0.250 NaOH(aq). The initial temperature is 19.50 degrees C and the

asked by Julian on April 21, 2011
39. ## Chemistry

Propanoic acid that, along with its sodium salt, can be used to make a buffer that has a pH of 5.25. If you have 532.9 mL of a 0.250 M solution of that acid, how many grams of the corresponding sodium salt do you have to dissolve to obtain the desired pH?

asked by Dinna on February 27, 2015
40. ## Math: Scalar Equation of a Plane

Determine whether the following pairs of planes are coincident, parallel and distinct or neither. a) x + 3y - z - 2 = 0 and 2x + 6y - 2z - 8 = 0 TEXTBOOK ANSWER: parallel and distinct Please provide a step by step solution so I can understand the

asked by Anonymous on March 25, 2008
41. ## electrochemistry

Calculate the cell potential of voltaic cells that contain the following pairs of half-cells. a)A half-cell containing both HgCl2 and Hg2Cl2; lead in a solution of Pb2+ ions.

asked by sma on August 1, 2010
42. ## Calculus AB

Find the x-coordinates of any relative extrema and inflection point(s) for the function f(x) = 3x(1/3) + 6x(4/3). You must justify your answer using an analysis of f '(x) and f "(x). My start to a solution: x-values: (-1/8) and (-1/4) I got -1/8 from

asked by Vikram on January 11, 2016
43. ## chemistry

Calculate the cell potential of voltaic cells that contain the following pairs of half-cells. a)A half-cell containing both HgCl2 and Hg2Cl2; lead in a solution of Pb2+ ions.

asked by sma on August 1, 2010
44. ## Chemistry

practice exam...not sure how to do this A solution contains 10.0 mmol of H3PO4 and 5.0 mmol of NaH2PO4. How many millimeters of 0.10 M NaOH must be added to reach the second equivilence point of the titration of the H3PO4 with NaOH?

asked by Minx64 on November 20, 2011
45. ## CHEM

a 250.0ml buffer solution is 0.250M in ascetic acid and 0.250M in sodium acetate. B). What is pH after addition of 0.0050mol of HCl? C). What is pH after addition of 0.0050mol of NaOH?

asked by ALISON on March 28, 2012
46. ## chemistry

In a particular redox reaction, Cr is oxidized to CrO42– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in acidic solution. Phases are optional. Cr + Cu2+ = CrO42- + Cu+

asked by Anonymous on February 24, 2012
47. ## Chem.

Why do metal oxides when dissolving in water make an alkaline solution? And Why non-metal oxides dissolve in water and become acids ? Is this a concept that has to be learned or is there a rule or a defintion for it

48. ## AP Chemistry

I'm having trouble getting the net ionic equation when HI is added to a buffered solution of HOBr. And the net ionic when HI is added to LiOBr. From those results I'm supposed to compare why one pH drops more than the other.

asked by KorieBird on March 13, 2018
49. ## chemistry

A reaction produced 0.40 mmol of H in a buffered solution which contained 300ml of 0.06M succinate buffer, pH is 4. What was the pH of the medium after the reaction was completed? The pKa of succinate buffer is 4.21

asked by veronica on April 19, 2013
50. ## chem

1. A single mole of AgNo3 weighs 169.88 grams. In order to make a 1M solution, how many grams of AgNo3 would need to be dissolved in 5oomL? How many moles do you need? moles = M x L. please help today

asked by moon on December 1, 2010
51. ## Chemistry

A solution is made by dissolving 10.20 grams of glucose (C6H12O6) in 355 grams of water. What is the freezing point depression of the solvent if the freezing point constant is -1.86 °C/m?

asked by Joseph on May 19, 2017
52. ## chemistry

concentrated sulfuric acid is typically 18.1 M H2 SO4. Calculate the volume in mL of concentrated sulfuric acid needed to prepare 125 mL of a 0.100 M H2SO 4 solution

asked by Rachael on April 23, 2013
53. ## Chemistry

a) Calculate [H3O^+] in a 0.15M solution of benzonic acid, HC7H5O2(aq) having K of 6.4x10^-5. b) Calculate the per cent ionization of the HC7H5O2. I got.. A) 0.16M but i did it again and got 7.2M so i'm very stuck as to the very different answers i got. B)

asked by Sarah on October 4, 2011
54. ## Chemistry

100 mL 0.1 M sodium acetate solution is mixed with 50 mL 0.1 M acetic acid. If now 0.937 mL of 1 M sodium hydroxide is added to the buffer what is the change in pH? pKa (acetic acid) = 4.76

asked by Jamie on January 9, 2016
55. ## chemistry

Consider the reaction: 2 NaBH4(aq) + H2SO4(aq) → 2 H2(g) + Na2SO4(aq) + B2H6(g) What volume, in mL, of a 0.500 M solution of NaBH4 is required to produce 0.529 g of B2H6? H2SO4 is present in excess.

asked by Bean on September 21, 2015
56. ## chemistry

Lactic acid, C3H6O3, is found in sour milk. A solution containing 1.00g NaC3H5O3 in 100.0mL of 0.0500M C3H6O3 has a pH= 4.11. Calculate the Ka of lactic acid

asked by Lauren on April 14, 2011
57. ## chemistry help

Which of the following is true of the solubility product constant? A. It is the product of the initial concentrations of the ions in a solution. B. It is an equilibrium constant. C. It is an equilibrium position. D. Its value changes in the presence of a

asked by emma on September 10, 2016
58. ## Science

Make a solutions by dissolving 4 lbs of sulfur dioxide in 100 lbs of water then heat to 30 degress C. what is the partial pressure of the sulfur dioxide over the solution specified?

asked by Ann on April 13, 2013
59. ## Chemistry

A solution contains .370 mol of isopropanol (C3H7OH) dissolved in 1.700 mol of water. A) What is the mole fraction of isopropanol? B) What is the mass percent of isopropanol? C)The molarity of isopropanol?

asked by Natalie on October 18, 2010
60. ## bio

You have a sample of NaCl that contains 100 mg/ml NaCl. You are trying to perform an reaction that requires 10ml of 20 mg/ml. Enter in the correct amount (in ml) of Stock NaCl solution you need to use to make 10ml of 20 mg/ml NaCl

asked by mina on March 1, 2011
61. ## Chem 1010

Determine how many moles of HCL are contained in 44.9 mL of 8.00 M solution of HCl. Express your answer in decimal form rounded to three decimal places. Do not include units with your answer.

asked by Sirena on April 10, 2012
62. ## Chemistry

How many grams of CO2 is produced from 855 grams of C6H12O6 in the process of cell respiration? Please further discuss the solution on how to get convert the mols of glucose to mols of CO2. Thank you.

asked by Anonymous on September 20, 2016
63. ## chemistry

Which of the following is true of the solubility product constant? A. It is the product of the initial concentrations of the ions in a solution. B. It is an equilibrium constant. C. It is an equilibrium position. D. Its value changes in the presence of a

asked by emma on September 10, 2016
64. ## Science

1. I got a list of solutions. We did a test in the lab to figure out what was there pH. How do you figure out which one is the most acidic and the most basic? 2.When might you need to know whether a solution is acidic or basic? 3. Dishwasher detergent,

asked by Neha on January 17, 2011
65. ## Chemistry

A solution is made by dissolving 10.20 grams of glucose (C6H12O6) in 355 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m?

asked by Maria on January 14, 2011
66. ## Calculus-Solved

this is wrong. but can you explain how to correct it? thanks use differential of x^-1/3 to approximate solution to (1/cube root(7.952)) differential: df= -1/3(x^(-4/3)) * dx df= -1/48 * 0.0048 df= -0.001 0.500 - 0.001 = 0.499 but this is wrong.

asked by Alaina on May 4, 2013
67. ## CHEMISTRY

calculate the ionization constant of the conjugate base for a solution made from 0.2Molar HC2H3O2 and 0.5Molar C2H3O2.The ionization constant for the acid (HC2H3O2) IS 1.8 Multiplied by 10^(-5)

asked by laze on March 31, 2012
68. ## Algebra

What is an expression that could be put in the blank so that the inequality would have the same solution set as shown in the graph? -4 < ______ < 16 The graph is is a numberline shaded between -4 and 6, with an open circle on -4 and open circle on 6.

asked by Max on January 27, 2015
69. ## Chemistry

How to make 100 mL of 100mM of Tris HCl and 100 mL of 100mM of Tris Base. Follow the pH of the resulting combined solution as it is heated from 0 to 50 degrees Celsius.

asked by Charlotte on January 16, 2015
70. ## chemistry

A solution is made by dissolving 21.5 grams of glucose (C6H12O6) in 255 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m?

asked by ryan on September 25, 2011
71. ## Chem 1010

Determine how many moles of HCL are contained in 44.9 mL of 8.00 M solution of HCl. Express your answer in decimal form rounded to three decimal places. Do not include units with your answer.

asked by Sirena on April 10, 2012
72. ## college chemistry

2h2o2(aq) ---> 2h2o(l) + o2(g) if someone puts 0.470 ml of hydrogen peroxide on a cut how many moles of hydrogen peroxide are used? Assume the density of the solution is equal to the density of water.

73. ## science

assuming that sea water is an aqueous solution of NaCl its density is 1.025g/mL at 20C temperature and NaCl concentration is 3.5%(by mass), the normality of the sea water?

asked by rajesh on April 16, 2016
74. ## Chemistry

suppose that you have a n unlimited supply of copper II chloride to react with iron. how manyt moles of copper would be produced by reacting 34.0g of iron with the copperII chloride solution?

asked by Lily on December 10, 2008
75. ## Integrated Science

What do positive hydrogen ions produce when they react with water in solution? A).hydroxide ions B).hydronium ions C).a salt D).negative hydrogen ions I believe the answer is A). Is this correct?

asked by Kiley on December 15, 2018
76. ## chemistry

A mosquito fed on a solution containing phosphorous-32 is released. Phosphorous-32 has a half-life of 14 days. When the mosquito is recaptured 28 days later, what percentage of the original Phosphorus-32 will remain?

asked by Victoria on January 20, 2015
77. ## Linear Programming

Tab 1: Linear Program: 50 points Consider the Linear Program: Max 2A + 3B s.t. 1A + 2B

asked by Patrick on January 20, 2011
78. ## college chem

a student dissolves 1.0mole of sucrose in 1000 grams of water at 1.0atm. Compared to the boiling point of pure water , the boiling point of the solution is?

asked by tom on September 1, 2017
79. ## AP Chemistry

In a saturated solution of Zn(OH)2 at 25 degrees Celsius the value of [OH-] is 2.0x10^-6M. What is the value of the solubility-product constant, Ksp, for Zn(OH)2 at 25 degrees Celsius? A. 4x10^-18 B. 8x10^-18 C. 1.6x10^-17 D. 4x10^-12 E. 2x10^-6 Help?

asked by Anonymous on March 9, 2010
80. ## Math

1. Lois is making applesauce. Each batch she makes yields 3.25 quarts of applesauce. Lois already has 1.5 quarts. She would like to have a total of 14.5 quarts before she is finished for the day. How many batches of applesauce does Lois need to make? First

asked by Rose on January 10, 2018
81. ## Chemistry

At –11.0 °C (a common temperature for household freezers), what is the maximum mass of aspartame (C14H18N2O5) you can add to 1.50 kg of pure water and still have the solution freeze? Assume that aspartame is a molecular solid and does not ionize when it

asked by Anon on January 29, 2013
82. ## CHEMSTRY

. A 25.0 ml sample of Ni2+ gave a weight height of 2.36 uA( corrected for a residual current) in a polarographic analysis. When 0.500 ml of solution containing 28.7 nmol of Ni2+ was added the wave height increased to 3.79 uA. Find the concentration of Ni2+

asked by ABDULALEH on November 22, 2008
83. ## Chemistry

The normal boiling point of ethanol is 78.4°C. When 9.16 g of a soluble nonelectrolyte was dissolved in 100. g of ethanol, the vapor pressure of the solution at that temperature was 7.40 102 Torr. (a) What are the mole fractions of ethanol and solute? (b)

asked by Daiyo on December 10, 2010
84. ## Chem 2

Vitamin K is involved in normal blood clotting. When 1.56 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 5.23 °C. . Calculate the molar mass of vitamin K. I posted this yesterday but I got the wrong

asked by Bri on February 21, 2014
85. ## chemistry

Determine themass of the copper solid produced when excess magnessuim metal reacts with 250 ml of 0.0500M copper acetate solution. if 6.00g of copper was recovered experimentally determine the percent yeild. Thank you in advance.

asked by Juliana on January 11, 2015
86. ## Science

Table salt has a solubility of 36g of salt in 100g of water at 40 degrees celcius. If 15g of salt is added to 50g of water at the same room temperature, is the resulting solution saturated of unsaterated? Explain your answer.

87. ## Chemistry

How does dissolved CO2 in distilled water affect the accuracy of the determination of a NaOH solution's concentration? How is the term acid anhydride applied here? I know you had answered this already, but what if KHP is used to titrate the NaOH. In this

asked by Sandy on March 29, 2014
88. ## AP Chemistry

An unknown metal M forms a soluble compound, M(NO3)2. A solution of M(NO3)2 is electrolyzed. When a constant current of 2.5 amperes is applied for 35 minutes, 3.06 grams of the metal M is deposited. Calculate the molar mass of M and identify the metal.

asked by Summer on April 8, 2013
89. ## algebra

would you help me write a logic application for andy has the cards1,5,and 7 belle has the crds 5,4,and 7 carol has the cards 2,4 and 6 whats the salient facts of the problem? explain the strategy for solving the problem? present a step by step solution for

asked by deborah cobb on January 22, 2013
90. ## Chemistry - Density

Automobile batteries contain sulfuric acid. Calculate the number of grams of sulfuric acid in 0.500L of battery acid if the solution has a density of 1.28g/mL and is 38% H2SO4 (small numbers) by mass? Can you please answer this for me? double post.

asked by Tracey on October 5, 2006
91. ## Chemistry/ Physical Chemistry

Napthalene is dissolved in a liquid with which it forms an ideal solution at 25C. The normal boiling point of napthalene is 80.2 C and ^fusH for napthalene is 19.0 KJ/mol. Determine the solublity of napthalene in this liquid at 25 C.

asked by Monquie on November 19, 2006
92. ## math

A SERVING TRAY MADE OF BRASS WEIGHS 21 OUNCES. THIS BRASS IS AN ALLOY OF 70 PERCENT COPPER AND 30 PERCENT TIN. WHAT IS THE WEIGHT IN COPPER? CHECK MY SOLUTION PLEASE! 70% OF 21 OZ= 30Z

asked by BOOKER on October 29, 2012
93. ## Chemistry

A copper coil is placed in a solution of silver nitrate, the reaction proceeds and in time silver crystals form and the colution of copper nitrate is produced. What is the complete raction .

asked by June on June 6, 2011
94. ## Physics

If a small planet were discovered whose orbital period was twice that of Earth, how many times farther from the Sun would this planet be? The answer for this one is 1.6 earth radii, but I can't seems to get solution to find the answer. I would appreciate

asked by john on May 12, 2015
95. ## Chemisrty

what is the molality of a 0.075m of ethyl alcohol in water at 25 degrees celcius. Assume the density of the solution at such low concentration is equal to that of water at 25 degrees celcius, 0.997g/ml

asked by Kate on February 13, 2011
96. ## Chemistry

The titration reaction of a solution containing 1.00 g mixture of Na2CO3 and K2CO3 with HCl shows that there are 8.50x10^-3 moles of C03-2. Find the weight percent of Na2CO3 and K2CO3 in the mixture. Please Help!!

asked by Magaly on December 7, 2014
97. ## math

A piece of wooden rod 31 cm long is to be cut into three parts, two of which are to be of equal length. the length of each of the two equal part is 5 cm longer than third part. find their lengths. solution pls.

asked by Taeyeon on January 13, 2015
98. ## Math

In a candy shop, the shopkeeper allows the exchange of 3 sweet rappers for 1 new sweet. John has 81 sweets at first. What is the largest possible number of sweets that john could have eaten? (with solution pls... tnx...)

asked by HELP HELP HELP MNHS on February 3, 2013
99. ## chem

Calculate the pH of the solution that results from mixing the following four aqueous solutions together: (1.) 100. mL of 0.300 M HI (2.) 200. mL of 0.250 M LiCl (3.) 300. mL of 0.200 M KOH and (4.) 150. mL of 0.150 M HBr a. ) 2.00 b. ) 3.99 c. ) 5.32 d. )

asked by Anonymous on March 7, 2009
100. ## Chemistry

An aqueous solution of a compound with a very high molar mass was prepared in a concentration of 82.7 g·L-1 at 25 °C. Its osmotic pressure was 0.540 ·102 Pa. Calculate the molar mass of the compound. Cheers

asked by David on April 28, 2010