# 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 274
1. ## Calculus

A machine earns the company revenue at a continuous rate of 62000 t + 43000 dollars per year during the first six months of operation, and at the continuous rate of \$74000 per year after the first six months. The cost of the machine is \$155000. The

asked by Jackie on April 15, 2008
2. ## English

Many people are surprised to learn how __1__ poverty is __2__ America. Today millions live below the poverty line, and the number seems to escalate daily. Judy and Martin Reed exemplify the old saying, “Opposites attract.” A __3__. Judy chooses work

asked by Brad on December 6, 2012
3. ## ENGLISH

Many people are surprised to learn how __1__ poverty is __2__ America. Today millions live below the poverty line, and the number seems to escalate daily. Judy and Martin Reed exemplify the old saying, “Opposites attract.” A __3__ Judy chooses work

asked by margaret on December 6, 2012
4. ## 11th grade

how do i solve this thermochemical equation? and what r the steps to it 1. Find the heat of reaction for the following equation. N2(g) + 2 O2(g) -> N2O4(g) given the following steps 2NO2(g) -> N2(g)+ 2O2(g) delta H=-84.8 kj N2O4(g)-> 2NO2(g) delta H= 72.8

asked by dawson on November 21, 2009
5. ## Chemistry - Colligative Properties

The freezing-point depression for a given aqueous solution is 0.32 K. The freezing-point depression constant for water is 1.86 K/m. Calculate the molality of solutes in the solution. The equation for freezing point depression is ΔTf = Kf · m, where ΔTf

asked by Kenna on January 16, 2018
6. ## GRADE 12 APPLIED MATH

The Problem: Create a quadratic function to model the height of an object thrown into the air with the following conditions The maximum height is between 90 and 100 m The object is starts on the ground The object takes at least 10 s before returning to the

asked by V on January 27, 2018
7. ## chemistry

Predict the effect of each of the following on the indicated equilibrium system in terms of which reaction will be favored (forward, reverse, or neither) H2(g)+Cl2(g)2HCl(g) +184 kJ A)addition of Cl2 B)removal of HCl C)increased pressure D)decreased

asked by Kristy on May 23, 2007
8. ## Chemistry 1046

A metal, M, of atomic mass 91 amu reacts with fluorine to form a salt that can be represented as MFx. In order to determine x and therefore the formula of the salt, a boiling point elevation experiment is performed. A 9.05-g sample of the salt is dissolved

asked by Anonymous on July 3, 2012
9. ## math help

emaily says that she can convert 18/25 to a decimal by using equivalent fractions instead of dividing 18 by 25. Use emily's method to convert 18/25 to a decimal. I am confused because there is not just 1 number equivalent to both 18 & 25. There are 2

asked by reece on September 11, 2014
10. ## maths

You have group of 27 learners ,12 boys and 15girls You need to select 5girls and 4 boys to go on a trip.Describe sampling method you would use in this case to select the learners

asked by Ayabonga on April 17, 2016
11. ## math

Using the unit-length method, calculate the total theoretical length of a rafter if the unit rise is 18″, the span is 8′, and the total run is 4′. A. 86.52″ B. 173.04″ C. 21.63″ D. 64.89″ Is it C?

asked by doug on November 27, 2018
12. ## math

equation pete and tom sold 41cds and tom sold 9more,.how many did pete sold. how do i get the anwser, It isn't clear to me how many Tom sold? IF he sold nine more than Pete then X = # Pete sold X + 9 = # Tom sold X + X + 9 = 41. Solve for X. Post your work

asked by Haydee on August 25, 2006
13. ## CHEMISTRY HELP!

(1) A beaker with 165 mL of an acetic acid buffer with a pH of 5.00 is sitting on a bench top. The total molarity of the acid and conjugate base in the buffer is 0.100M. A student adds 7.20mL of a 0.320M HCl solution to the beaker. How much will the pH

asked by Ashley on July 13, 2009
14. ## Chemistry

A saturated solution of MgF2 at 23 degrees C was prepared by dissolving solid MgF2 in 1 L water. The Ksp of MgF2 is 1.5e-5. a.)Calculate the mass of MgF2 dissolved. b.) When .1 mols of solid KF was dissolved in the MgF2 solution, precipitation was

asked by Anonymous on March 19, 2014
15. ## Accounting PLEASE HELP!!!!!!!!!

Reading Foods is interested in calculating its weighted average cost of capital (WACC). The company’s CFO has collected the following information: • The target capital structure consists of 40 percent debt and 60 percent common stock. • The company

asked by Michael on March 28, 2010
16. ## Math (Accounting)

Reading Foods is interested in calculating its weighted average cost of capital (WACC). The company’s CFO has collected the following information: • The target capital structure consists of 40 percent debt and 60 percent common stock. • The company

asked by Michael on March 28, 2010
17. ## bobpursly & countiblis,math

I thought that we can solve anything with equations is it always polynomials. Isn't this the same thing as finding the unknown for an equation. As i said in my previous message or am i wrong. Also what about the rational expressions what are some

asked by jas20 on March 5, 2007
18. ## physics

A block is pushed 2 m along a fixed horizontal surface by a horizontal force of 10 N. The opposing force of friction is 0.4 N (a)How much work is done by the 10 N force? (b)what is the work done by the friction force

asked by kwaku on November 13, 2010
19. ## College Physics

Calculate the rotational inertia of a meter stick, with mass 0.58 kg, about an axis perpendicular to the stick and located at the 43 cm mark. (Treat the stick as a thin rod.) I know I = (1/12)(M)(L^2) and then I need to use the parallel-axis theorem so I

asked by Ryan on December 1, 2009
20. ## Chemistry; stoichiometry

Determine the theoretical yield of silver that is produced if the other product is Copper(II) Nitrate. Copper that reacted: 0.3180 This is what I had: 0.3180g Cu x 1mol Cu/63.5g Cu x 2mol Ag/1mol Cu x 107.87g Ag/1mol Ag = 1.079g Ag (Set up in factor label

asked by John on December 7, 2014
21. ## Biology

"Suggest two things a large cell might do to increase its surface area:volume ratio". The obvious method would be to divide into many smaller cells...but what else can the cell do? I also thought that it could just simply grow larger, but the question

asked by Stuck on March 30, 2010
22. ## chemistry

1. why is it necessary to use boiled and cooled water in the dilution of the carbonate sample? 2. an aliquot of the diluted sample is titrated with some standard HCl until near the equivalence point, then it is boiled for 2-3 minutes. why should we boil

asked by angelo on January 6, 2011
23. ## English- Arabian/1001 Nights

1) What is the main purpose for Shahryar and Shahzaman’s journey together? To find someone whose suffering is greater than their own To escape the revolt Shahryar caused by executing most of the single women in his land To rekindle their brotherly love,

asked by Michael on July 11, 2014
24. ## Hisotry- Arabian/ 1001 Nights?

1) What is the main purpose for Shahryar and Shahzaman’s journey together? To find someone whose suffering is greater than their own To escape the revolt Shahryar caused by executing most of the single women in his land To rekindle their brotherly love,

asked by Michael on July 11, 2014
25. ## chemistry class

i posted this question a few minutes ago i tried to solve it on my own can someone check if my work is okay? The data in the table below were obtained for the reaction: A + B → P 3 Experiments 1 (A) (M): 0.273 (B) (M): 0.763 Initial Rate (M/s): 2.83 2

asked by jack ross on October 24, 2010
26. ## chemistry check 2

I know you've read this question too many times already but I just want to make sure I did the last part (Ksp) correctly. 50.0 ml of a 0.0500 M solution of lead (II) nitrate is mixed with 40.0 ml of a 0.200 M solution of sodium iodate at 25°C. Calculate

asked by mel on May 17, 2007
27. ## Chem

The apparent equilibrium constant for the reaction A + B 2C is Kc= 4.11 at 298.2 K. Given that the initial concentrations of A, B, and C are .10M, .10M, and zero, respectively, find the equilibrium concentrations of A, B, and C. I had this long, drawn out

asked by Chris on April 16, 2007
28. ## chem

I have to balance an equation and I had to make the equation from an experiment we did. So far, my equation looks like this and I know what I have is correct: Cu(NO3)2+H20+NaOH----->Cu(OH)2 I think I probably need an N or a Na on the right side. What do

asked by Abby on March 5, 2007
29. ## math statistics

Hello I am having trouble trying to figure out how to do this probability word problem: In an article about investment growth, Money magazine reported that drug stocks show powerful long-term trends and offer investors unparalleled potential for strong and

asked by aaron on September 22, 2009
30. ## Math

Mr Gopal left 3/10 of his fortune to his wife. Of the remainder, 1/10 was donated to charity and the rest was distributed among his 4 children , A , B , C and D in the ratio of 4:3:3:2 . If \$63000 was given to charity, calculate (a)the amount received by A

asked by Jason on May 18, 2012
31. ## sicence

Which example describes a method of relative dating? A. examining historical records to determine when a volcano erupted B. using radioactive isotopes to calculate the age of a rock C. measuring the depth of tree bark D. using fossils to determine the

asked by megan on October 23, 2013
32. ## AP chem

Complete and Balance the following equation using the half-reaction method; (MnO4^-) + (CH3OH) --> (Mn^2+) + (HCO2H an explanation/step by step would be nice because i keep getting wrong answer from the H+ & H2O (they are both suppose to be 12 according to

asked by Alice on March 26, 2017
33. ## science

Which example describes a method of relative dating? A. using fossils to determine the oldest rock layer in a canyon B. using radioactive isotopes to calculate the age of a rock C. measuring the depth of tree bark D. examining historical records to

asked by dominique on December 4, 2012
34. ## chemistry- redox

Complete and balance the following equations using the method of half-reaction. both reactions happen in acidic solutions: a. Cu(s) + NO3-(aq)--> Cu2+(aq) + NO2(aq) b. Mn2+(aQ) + NaBiO3(s)--> Bi3+(aq) + MnO4-(aq) I'm having trouble getting the half-rxn

asked by lucylu on September 12, 2010
35. ## math algebra

At your local bar, chicken wings cost \$0.30 a piece on Thursday night. Sriacha Ranch dressing (enough for 10 wings), cost \$0.10 per serving. A pitcher of of ice tea cost \$7.50 and a serving of celery cost \$2.50 . Tax in your part of LA County is 8.5% and

asked by Justin on August 3, 2015
36. ## chemistry

Topic: Iodometry 1. The importance of precipitating the Cu2+ ions using NH3 and redissolving it with acetic acid 2. What are other means of detecting endpoint in iodometry aside from adding starch indicator 1. A pH that is too low leads to excessive

asked by smiley on July 29, 2007
37. ## math

Allison and Fred both work at the mall., but Allsion make \$2 more than Fred. They work equal hours. Let x represent Allison earnings and y to represent Fred earnngs. Draw a graph representing the relationship between Allison and Fred earnings.

asked by patrick on September 21, 2015
38. ## physics

Two springs X and Y have spring constants k and 2k respectively.Spring X is stretched by a force F and spring Y is stretched by a force 2F. Each spring obeysHooke’s law during the extension.The work done in stretching spring X is WX and the work done in

asked by varsha on November 3, 2015
39. ## physics

A 4.36 × 10−5 kg raindrop falls vertically at constant speed under the influence of gravity and air resistance. After the drop has fallen 88.1 m, what is the work done by gravity? The acceleration of gravity is 9.8 m/s2 . Answer in units of J What is

asked by lynn on October 26, 2011
40. ## Math

In my textbook, I was given these directions to follow when doing these problems: **Multiply. Express each result in Scientific Notation** 1. (4 x 10^9)(6 x 10^6) My work: (400,000,000)(600,000)= 240,000,000,000,000 My answer: 2.4 x 10^14 Am I right? 2. (5

asked by PrimroseEverdeen on November 19, 2015
41. ## Physics

62kg person in an elevator is moving up at a constant speed of 4.0m/s for 5.0s a) calculate the work done by the normal force on the person. b) calculate the work done by the force of gravity on the person . c) How would your answer change if the elevator

asked by lomonoyan on April 20, 2016
42. ## Spanish

I am having troubles translating these sentences. 1.) Were the princesses singing? 2.) Did the queen used to cry? 3.) Do they like to sing? 4.) Doesn't the duchess like to sing? 5.) Which duke likes to sing? Thank you for using the Jiskha Homework Help

asked by Aubrey on June 4, 2007
43. ## physics

The (non-conservative) force propelling a 1.90 x 103-kg car up a mountain road does 6.70 x 106 J of work on the car. The car starts from rest at sea level and has a speed of 20.0 m/s at an altitude of 1.80 x 102 m above sea level. Obtain the work done on

asked by alika on October 2, 2014
44. ## physics

Determine whether each statement below is true or false. The force necessary to lift an object is its mass times g. Kinetic energy is the energy of motion. Stopping distance is doubled, if speed is doubled. Work is the product of force and time. A joule is

asked by confused on October 16, 2014
45. ## physics

The (non-conservative) force propelling a 1.40 x 103-kg car up a mountain road does 7.60 x 106 J of work on the car. The car starts from rest at sea level and has a speed of 22.0 m/s at an altitude of 2.50 x 102 m above sea level. Obtain the work done on

asked by Anonymous on April 20, 2016
46. ## English

i am trying to write a paper on Frankenstein. the question is "Is Frankenstein a work of science fiction?"....i have to write a persuasive essay...i believe that it is a work of science fiction...but as ussuall i need sources and proves from the book to

asked by Anonymous on February 13, 2008
47. ## physics

The (nonconservative) force propelling a 1.50 103-kg car up a mountain road does 5.10 106 J of work on the car. The car starts from rest at sea level and has a speed of 31.5 m/s at an altitude of 1.90 102 m above sea level. Obtain the work done on the car

asked by Natasha on March 14, 2012
48. ## health care 220

can someone just tell me how to do this I can not get a hold of my teacher. I do not want the answer I just do not understand how to do it. A. Use the matrix below to describe each approach to organizing information about the body. Discuss how each

asked by angela on December 7, 2008
49. ## Physical Science

For questions #14 – 17, write an equation for the reaction of magnesium oxide with sodium chloride to produce magnesium chloride and sodium oxide. 14. Show the formulas of the reactants. 15. Show the formulas of the products. 16. Write the balanced the

asked by Amber on September 13, 2014
50. ## Physics

What work is required to stretch a spring of spring constant 500N/m from x1=.2m to x2=.25m? Assume the unstreched position is at x=0. W=Fd so w=(500)(.25-.2) =500(.05) =25J is this correct? Calculate the work required to compress an initially uncompressed

asked by Andrea on October 17, 2007
51. ## Algebra 1

11) Tell which real number corresponds to the situation. During a quiz, a person loses 1800 pts. answer: -1800 12) Solve for y z=yq Answer: z-q=y 13) Solve using the multiplication principle 10x=-90 Answer: x= -9 14) Collect like terms 20w+w+14/19w Answer:

asked by deedee on November 5, 2008
52. ## managerial finance

Completed all answers except the last one and I am stuck. Can someone please show me how to solve? I can't figure it out and I would like to have the steps so I can learn how to solve. Thank you! Jiminy's Cricket Farm issued a 30-year, 7.2 percent

asked by JoJo on November 24, 2015
53. ## physiology

Is the following statement True or False, and Why? The presence of a hyperosmotic solution in the duodenum will stimulate gastric emptying. True; this helps to speed up the absorption process True; the hyperosmotic solution draws contents in from the

asked by Anna on April 26, 2010
54. ## math

the diagram shows a piece of wood in the shape of a cuboid. diagram: 3cm width, 20cm length, 1.2m for the volume of cuboid The piece of wood is 3cm by 20cm by 1.2m. The mass of wood will float in sea water if the density of the wood is less than the

asked by supersupersuper on January 3, 2017
55. ## math

green eggs 2.25 regular eggs 2.00 ham 1.50 bacon 1.25 small drink 0.75 large drink 1.00 today's special 4.25 ticket #5 2(G+H) what was ordered? what was the cost>? what method did you use to figure out? what is another way to calculate the price for ticket

asked by kathy on August 13, 2015
56. ## Math

Janine wants to paint just the sides of a cylindrical pottery vase that has a height of 45 cm and a diameter of 14 cm. To the nearest whole number, find the number of square centimeters she will need to paint. Explain the method you would use to find the

asked by Alex on September 14, 2015
57. ## Human Service Management

What method of ethical oversight (a code of ethics, ethic advisory board, oversight by the board of directors, or an ethic audit, for example) would you suggest for Acre Woods retirement community as described in the case study?

asked by Debra on January 5, 2010
58. ## human services

please tell me if I am correct: a data collection method could be a face to face interview or an observation and a data collection instruments are summary report forms, questionaries, and behavioral diaries? Also could you explain to me what managerial

asked by Anonymous on January 30, 2012
59. ## maths

From the top of a tree,15.5 meters high,the angle of depression of a leopard is 29 degrees. Calculate the distance between the leopard and the tree. I know the answer (it's provided to us as a guide), however the method is stumping me as my working out

asked by Gabi on August 16, 2016
60. ## geometry

Janine wants to paint just the sides of a cylindrical pottery vase that has a height of 45 cm and a diameter of 14 cm. To the nearest whole number, find the number of square centimeters she will need to paint. Explain the method you would use to find the

asked by Emi on February 4, 2015
61. ## Linear Algebra

Consider the linear transformation T: R^3->R^3 which acts by rotation around the y-axis by an angle of pi, followed by a shear in the x-direction by a factor of 2. a) Find the matrix for T. Explain your method. b) What is T(1,2,3) c) Without calculation,

asked by Brody on March 5, 2014
62. ## Chemistry

One method of removing CO2(g) from a spacecraft is to allow the CO2 to react with LiOH. 2LiOH(s)+CO2(g)---->Li2CO3(s)+H2O(l) How many liters of CO2(g) at 25.5 degrees celsius and 749 Torr can be removed per 9kg of LiOH consumed?

asked by Kaylee on October 26, 2010
63. ## Math for Computer Science

Suppose the domain of the propositional function P(x, y) consists of pairs x and y, where x = 1, 2, or 3, and y = 1, 2, or 3. Write out the propositions below using disjunctions and conjunctions only. ∃x∀y ¬P(x, y) The above is equivalent to

asked by Kid on September 26, 2018
64. ## science

what method of separation would do the best job to separate sand and water? hint* What would happen to the water if you put the mixture of sand and water in a pan and heated it on a stove for quite a long time? What's it called when water goes into the

asked by jenna on June 21, 2006
65. ## Math - Standard Deviation

A General Electric soft white 3-way bulb has an average life of 1200 hours with a standard deviation of 50 hours. Find the probability that the life of one of these bulbs will be between 1150 and 1300 hours. You need to change the times to Z-scores

asked by GetYourLeash on July 22, 2005
66. ## Chemistry

If I was designing an experiment where hydrogen gas was collected over a 0.1 M aqueous HCl solution from the reaction with zinc metal and I assume complete, rapid reaction, what mass of zinc would be used to collect between 50 and 100 mL of the gas? Note:

asked by Student on March 9, 2016
67. ## Chemsitry

Tris is an abbreviation for tris (hydroxymethyl) aminomethane, which is a weak base. Calculate how many grams of tris (mw=121.14g/mol) are needed to make 25mL of 0.10M tris solution. Calculate how many mL of 0.25M HCl are needed to convert half of the

asked by Cassandra on April 2, 2012
68. ## Statistics

Let X1;X2;X3;...;X6 be a random sample from a distribution with the following probability desity function: Fx(x) = (1+4x)/3 for 0

asked by ruth on August 10, 2006
69. ## physics

A catapult gives a rock a vertical velocity of 122m/s. a. Determine the time the rock is in the air. b. Determine the maximum height the rock would reach. c. As the rock leaves the catapult the rock also has a horizontal velocity of 34m/s. solve for the

asked by Sadie on November 19, 2012
70. ## Math

I tried to solve this but can't seem to find a procedure to solve this: To measure the height of Lincoln's caricature on Mt. Rushmore, two sightings 800 feet from the base of the mountain are of Lincoln's face is 32 degrees and the angle of elevation to

asked by Amy~ on May 17, 2011
71. ## chemistry

Sodium dodecyl sulfate (SDS) has the structure below. The surface tension of water changes as SDS is added, as shown in the graph below. (a) Why does the surface tension of water change as SDS is added? The number of micelles increases, which allows the

asked by Anonymous on May 8, 2013
72. ## Social Studies

Please check thanks! 1. Which action on the part of the progressives had the LEAST immediate effect on South Carolina? a. ending child labor b. ending business trusts*** c. outlawing the use of alcohol d. extending suffrage to women 2. Which amendment to

asked by SpitFireRedHead on April 9, 2016
73. ## chem

quantitative determination of acetylsalicylic acid in aspirin tablets by back titration 1)why do we use a more dilute NaOH solution for the standardization of NaOH? 2)what is the rationale behind the dilution and aliquoting of the aspirin sample? 3)what

asked by krissy on January 20, 2009
74. ## Chemistry

A student determines the freezing point of a solution of 1.96g of naphthalene in 25.64g of paradichlorobenzene(PDB). The following temperature-time reading are recorded. PDB/Napthalene Time(Min) 0 0.5 1.5 2 2.5 3 3.5 4 4.5 Temp(°C) 59.7 58.0 54.8 53.4

asked by Lisa on October 12, 2015
75. ## Chemistry

A student determines the freezing point of a solution of 1.96g of naphthalene in 25.64g of paradichlorobenzene(PDB). The following temperature-time reading are recorded. PDB/Napthalene Time(Min) 0 0.5 1.5 2 2.5 3 3.5 4 4.5 Temp(°C) 59.7 58.0 54.8 53.4

asked by Lisa on October 12, 2015
76. ## chemistry

25 ml of SHW containing CaCO3 1 g/L consumes 12 ml of EDTA. 25 ml of hard water consumes 8 ml of standard EDTA solution. After boiling the sample, 25 ml of the boiled hard water consumes 6 ml of standard EDTA solution. Calculate the total, permanent and

asked by priyanka on August 15, 2016
77. ## chemistry

A solution was prepared with 100 ml of 0.1 mol/L acetic acid and 100 ml of 0.1 mol/l sodium acetate. The density of acetic acid is 1.05 g/mL Calculate the required volumes of each to prepare 25 mL of a buffer solution PH = 5.0. and calculate the PH. Data:

asked by wallace on August 25, 2018
78. ## Chemistry

Freezing point of pure water = -2, Freezing point of Unknown solution = -1 Mass of unknown in 50g of water = 1.9964g. Calculate the delta T for the solution of the unknown solid and determine the molecular weight of the unknown solid.

asked by Anna on February 2, 2013
79. ## chemistry

What volume of ethylene glycol (C2H6O2), a nonelectrolyte, must be added to 20.0 L of water to produce an antifreeze solution with a freezing point of -28.0°C? (The density of ethylene glycol is 1.11 g/cm3, and the density of water is 1.00 g/cm3.) .....L

asked by Rita on November 30, 2008
80. ## Science

Coprecipitation involves: A. Precipitation of 2 insoluble substancs simultaneously from the same solution. B. Precipitation of a normally soluble material with an insoluble material C. Failure to separate 2 insoluble materials because the soluble material

asked by Lyn on May 20, 2019
81. ## physics

A toy sled with a mass of 1.0 kg is sliding down a ramp that makes an angle of 25° with the ground. The coefficient of kinetic friction between the toy sled and the ramp is 0.25. 4. In a coordinate system where the x-axis is parallel to the ramp and the

asked by Jeremy on October 19, 2010
82. ## math

What models can be used to help explain the concepts of addition and subtraction of rational numbers? What are the benefits to using such a model? What limitations does the model have? Create an addition or subtraction problem and demonstrate how the model

asked by glenn on October 26, 2010
83. ## Math HELP! Ms.Sue

A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. 1. What is the probability of selecting a purple marble and then a white marble? 2. What is the

asked by Anon101 on May 18, 2015
84. ## HELP!! MATH!

A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. 1. What is the probability of selecting a purple marble and then a white marble? 2. What is the

asked by Anon101 on May 18, 2015
85. ## algebra

Could someone please check my work. what is the slope of the line that passes through the given points?(2,12( and (6,11) -1/4 (my choice) 1/4 4 -4 My work: 11-12/6-2=-1/4 what is the slope of the line that passes through the given points? undefined( my

asked by brandon on September 7, 2012
86. ## Math.

How do you find the slope of this inequality (to graph it) x/14-85>6? The first thing to do is to determine what type of equation it is and what the solution set is. This is an inequality in one variable so it will only be some subset of the x-axis. We're

asked by Mel on September 7, 2006
87. ## chemistry

When 0.320 moles of NH4Cl is dissolved in 1.00 L of water, the temperature drops by 13.7 degrees C. What is the heat of solution of ammonium chloride? The solution has a density of 1.0012 g/mL and a specific heat of 0.9818 cal/g degrees C. How do you find

asked by anita on April 7, 2010
88. ## chemistry

What is the total vapor pressure4 at 20° C of a liquid solution containing 0.30 mole fraction benzene, C6H6, and 0.70 mole fraction toluene, C6H5CH3? Assume that Raoult’s law holds for each component of the solution. The vapor pressure of pure benzene

asked by Tim on September 14, 2010
89. ## Gen Chemistry

The following absorption data of a solution was collected in a cell with 1 cm path length. The absorption of the same substance in a solution with unknown concentration was 0.197. What is the concentration of the unknown substance? c (M) A 1.00x10-3 0.119

asked by Kevin on December 12, 2010
90. ## Chemistry

A reaction is said to be diffusion controlled when it occurs as fast as the reactants diffuse through the solution. The following is an example of a diffusion controlled reaction. The rate constant for this reaction is 1.4x1011 M-1s-1 at 25oC and the

asked by Kevin on May 19, 2009
91. ## college

0.02 g of CaCO3 is dissolved in 1 L of water. Calculate the moles of calcium carbonate that have dissolved in the water, the moles of Ca2+ ions in solution, and the number of Ca2+ ions in solution?

asked by mike on January 27, 2010
92. ## Chemitry

3moles of sodium hydroxide will neutralize 1mole of citric acid,what volume of 2moles of sodium hydroxide solution will neutralize 50cm of citric acid solution?

asked by Zuhur on January 2, 2012
93. ## Math 117 Algebra

for the following equation, state the value of the discriminant and then describe the nature of the solution 11x^2+4x+18=0 What is the value of the discriminant? Which one is correct? a. the equation has two real solutions b. the equation has two imaginary

asked by Ginger on June 18, 2010
94. ## Chemistry

0.02 g of CaCO3 is dissolved in 1 L of water. Calculate the moles of calcium carbonate that have dissolved in the water, the moles of Ca2+ ions in solution, and the number of Ca2+ ions in solution?

asked by mike on January 27, 2010
95. ## Accounting

Materials costs of \$300,000 and conversion costs of \$321,300 were charged to a processing department in the month of September. Materials are added at the beginning of the process, while conversion costs are incurred uniformly throughout the process. There

asked by MAVIS on November 14, 2011
96. ## physical science

For questions #14 – 16, write an equation for the reaction of magnesium oxide with sodium chloride to produce magnesium chloride and sodium oxide. 14. Show the formulas of the reactants. 15. Show the formulas of the products. 16. Write the balanced the

asked by Maria on December 20, 2014
97. ## physics

10. A 2-kg object is moving at 3m/s. A 4-N force is applied in the direction of motion and then removed after the object has traveled an additional 5m. The work done by this force is: A. 12 J B. 15 J C. 18 J D. 20 J E. 38 J ans: D 11. A sledge (including

asked by Anonymous on December 31, 2014
98. ## music

Click the link --- Leonard Bernstein. Submit in the Dropbox. Read the entire article. Write 1 paragraph (5 to 7 sentences each) summarizing the article. Write 1 paragraph. Research one musical work that Bernstein created. Using your musical knowledge

asked by ocean on April 24, 2019
99. ## 8th grade English/Language Arts

1.)Why does the author of “Always to Remember” discuss Maya Ying Lin’s background? a.)to show that she experienced hardships b.)to appeal to Chinese-American readers c.)to show its influence on her design d.)to show her disinterest in architecture

asked by Veronica on October 28, 2014
100. ## Algebra 1--Please, Check My Answers!

1. How did Mesoptamin and Egyptain city states develop concepts of law codes and divine kingship? 2. What was Charlemagne's influence on European civilization? Answers: 1. Hammurabi developed the concepts of law codes in Mesopotamia, while the pharaoh was

asked by Victoria on September 16, 2014