# 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 218
1. ## physical geography

If a ship's flag is 36' above sea level, could it be seen by someone in a building 100' high that was 18 miles away? (please show work) Yes it is visible. The ship and building are separated by a subtended angle of A = 0.2604 degrees. Between sea level

asked by Michelle on August 27, 2005
2. ## QUOTATION MARKS

1.Which of the following is one reason to use quotation marks in a sentence? to show you have used someone’s exact words in your paper and the quote is under four lines to mark an indirect quote to show paraphrased information you borrowed from a source

asked by christopher on April 27, 2010
3. ## Chemistry

Analysis of a compound indicates that it is 49.02% carbon, 2.743% hydrogen, and 48.23% chlorine by mass. A solution is prepared by dissolving 3.150 grams of the compound in 25.00 grams of benzene, C6H6. Benzene has a normal freezing point of 5.50degreeC

asked by Tracy on January 10, 2011
4. ## Chemistry

Analysis of a compound indicates that it is 49.02% carbon, 2.743% hydrogen, and 48.23% chlorine by mass. A solution is prepared by dissolving 3.150 grams of the compound in 25.00 grams of benzene, C6H6. Benzene has a normal freezing point of 5.50degreeC

asked by Tracy on January 10, 2011
5. ## Chemistry

Analysis of a compound indicates that it is 49.02% carbon, 2.743% hydrogen, and 48.23% chlorine by mass. A solution is prepared by dissolving 3.150 grams of the compound in 25.00 grams of benzene, C6H6. Benzene has a normal freezing point of 5.50degreeC

asked by Tracy on January 10, 2011
6. ## Math

At the Highland Hotel 578 of the 850 employees work directly with the guess. What percent of employees work directly with the guests? How do I figure it out?

asked by Auntie on May 15, 2016
7. ## Physics

A spring with a force constant of 4.5×104 N/m is initially at its equilibrium length. How much work must you do to stretch the spring 0.070 m? How much work must you do to compress it 0.070 m?

asked by Franky on March 9, 2010
8. ## Art

Can you check these sentences, please? 1) You are forbidden to enter this area. You mustn't enter this area. 2) It wasn't necessary for John to go to work because it was Sunday. He didn't have to go to work.

asked by Mike on June 23, 2012
9. ## math

A man,a woman and a boy can complete a piece of work in 20,30 and 60 days respectively.How many boys should join 2 men and 8 women to complete the work in 2 days?

asked by Nitumoni on September 26, 2014
10. ## Physics

If a box is being pulled up a hill at an angle to find work, its W=Fdcos(angle) If a hiker is walking up a hill, the work done is W=mgh right? When do you know when you can use what formula?

asked by John on March 14, 2011
11. ## probability

In the state of Georgia, telephone numbers consists of 10 digits, including the area code. One of these area codes is 770. The first digit following the area code cannot be 1 or 0. Find the number of possibilities for telephone numbers in area code 770.

asked by Anonymous on July 22, 2016
12. ## algebra

the gateway arch is the tallest man-made monument found in the united states in St. Louis missouri. The gateway arch can be closely approximated by a parabola, is 630 feet high and 630 feet across at the base. 1) the maintenance crew is doing ht side of

asked by reneet on May 26, 2014
13. ## Physics

For a rectangular metal surface with dimensions 5 cm by 3 cm, the threshold wavelength for the photoelectric emission of electrons is 246.0 nm. (a) Calculate the work function of the metal surface. So I planned to use: hf - workfunction = eV Then I replace

asked by Kid on December 8, 2017
14. ## Algebra 1: 8th Grade

Montreal and Quebec City are about 260km apart along Route 20 in Canada. Sylvia is leaving Montreal to go to Quebec City at a speed of 90km per hour. And Anne is leaving Quebec City to go to Montreal at a speed of 105km per hour. a) When and where do

asked by Joy on October 27, 2008
15. ## Chemisty

Before solving the problem write a balanced chemical equation Excess aqueous NaI was added to 50 mL of aqueous CuNO3 solution, and 14.2 g of CuI precipitate was formed. What was the molar concentration of CuNO3 in the original solution? Answer in units of

asked by Nick on April 12, 2013
16. ## science

Destiny is using a nutrient solution to use in her garden.She places the powder in a watering can.Then she adds the water.Which would dissolve the powder the fastest? A.SHAKING THE CAN VIGOROUSLY B.STIRRING THE SOLUTION SLOWLY C.TILTING THE CAN CAREFULLY

asked by Harry on October 25, 2011
17. ## Chemisrty

if electricity of sufficient voltage is passed into a solution of potassium iodide in water, a reaction takes place in which elemental hydrogen gas and elemental iodine are produced, leaving a solution of potassium hydroxide. what is the unbalanced

asked by Mandy on March 20, 2016
18. ## chemistry

A solution of HClO4 was standardized by dissolving 0.4125 g of primary standard grade HgO ina solution of KBR: HgO (s) + 4Br- + H2O → HgBr4 + 2OH- The liberated OH- consumed 46.51 mL of the acid. calculate the molarity of the HClO4

asked by nthabi on August 27, 2014
19. ## chemistry

in the preparation of the standard curve for protein analysis, 50mg BSA(bovine serum albumin) dissolved in water to a final volume of 5ml was used as stock solution.What is the weight of BSA in 0.1ml of stock solution? in 0.2ml?

asked by jen on August 26, 2018
20. ## Chemistry

If 31.00 mL of a dilute solution of lime water (calcium hydroxide) required 10.10 mL of 0.246 M hydrochloric acid solution for neutralization to a methyl red end point, calculate the molarity of the lime water. Can you please explain how to do it? Do I use

asked by Lara on April 2, 2011
21. ## chemistry

An experiment in your laboratory requires 500 mL of a .0200 M solution of Na2CO3. You are given solid Na2CO3, distilled water and a 500 mL volumetric flask Describe how to prepare the required solution showing all calculations and describing each step

asked by Jennifer on November 15, 2011
22. ## Chemistry

Predict the most likely redox reaction and use the spontaneity rule to predict whether the reaction will occur spontaneously. 1. An aqueous solution of potassium permanganate was reacted with an acidic solution of sodium bromide and an orange-born

asked by Alex on February 27, 2008
23. ## chemistry

2Na3PO4(aq)+3 Ba(NO3)2(aq)---->Ba3(PO4)2(s)+6NaNO3(aq) a solution containing 3.50g of Na3PO4 is mixed with a solution containing 6.40g of Ba(NO3)2 how many grams of product can be formed? and if the above reaction resulted in 3.659 g of white powder, what

asked by mckayla on November 17, 2011
24. ## Chemistry

4.80 dm^3 of chlorine gas was reacted with NaOH solution. a) how many moles of Cl2 reacted b) what mass of NaOCl was formed? c) if the concentration of the NaOH was 2.00 mol/dm^3. What volume of sodium hydroxide solution was required? d) write an ionic

asked by Gary on July 12, 2016
25. ## Chemistry

An organic acid has a percentage composition by mass of C 41.4%, H 3.4%, and O 55.2%. A solution containing 0.250g of the acid, which is dibasic required 26.60 cm cubed of NaOH solution (0.20 mol.dm -3) for neutralisation. Calculate the empirical formula,

asked by Manu on September 20, 2014
26. ## Physical Science

24. What happens when a solution of nitric acid (HNO3) is added to a solution of potassium hydroxide (KOH)? What are the products? 25. Which of the following compounds can react with H2SO4 to form a salt: NaCl, Ca(OH)2, HF, AlCl3, H2O, Mg(OH)2? Name the

asked by Alexandra on October 15, 2013
27. ## Chemistry

Air in the vicinity of a local power station contains 8.8x10^-4 gm^-3 SO2. What volume of 0.001moldm^-3 Iodine solution would be required to react with a solution obtained from 200dm^3 of contaminated air? The equation given is SO2 + I2 + 2H2O ==> H2SO4 +

asked by Matt on January 26, 2013
28. ## chemistry

0.550g sample containing only nacl and kbr.it dissolved in water and titrated with a 0.0322M solution of agno3. complete titration of both halides was found to require 30.45ml of agno3 solution. calculate the weight percent of cl in the solid sample.

asked by jacque on March 27, 2009
29. ## Chemistry

A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.135g of this subunit was dissolved in enough water to produce 2.00 mL of solution. At 28 ∘C the osmotic pressure produced by the solution was 0.138

asked by Al on June 27, 2014
30. ## chemisty

When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) MgCl2 (aq) + H2 (g), if 24.3 g of Mg and 75.0 g of HCl are allowed to

asked by kim on November 17, 2013
31. ## chemistry step by step for me clearly

Al2(s04)3 solution of a molal concentration is present in 1 litre solution of 2.684g/cc. How many moles of bas04 would be precipitated on adding bacl2 in excess. The answer 6M I want some tutors to explain for me step by step clearly. I do not still

asked by ken on July 12, 2014
32. ## Chemistry ammonia gas

In an experiment i had a test tube with Ca(NO3)2 solution in it and I added NaOH and a piece of aluminium. After carefully heating the solution ammonia gas was formed Can you help me write the equation for the reaction? I don't know the other products just

asked by Marysia on October 29, 2008
33. ## Science

Destiny is using a nutrient solution to use in her garden.She places the powder in a watering can.Then she adds the water.Which would dissolve the powder the fastest? A.SHAKING THE CAN VIGOROUSLY B.STIRRING THE SOLUTION SLOWLY C.TILTING THE CAN CAREFULLY

34. ## chem

A quantity of 16.13 mL of a KOH solution is needed to neutralize 0.4883 g of KHP. What is the concentration (in molarity) of the KOH solution? I don't even know where to begin with the first one. Calculate the amount of heat liberated (in kJ) from 375 g of

asked by ash on February 26, 2009
35. ## Chem 112

Calculate the pH of a buffer solution prepared by dissolving 0.12 mole of cyanic acid, HCNO and 0.65 mole of sodium cyanate, NaCNO in enough water to make 1.0 liter of solution. [Ka(HCNO) = 2.0 × 10-4] I know that this question has something to do with

asked by Bridget on March 21, 2011
36. ## physics

here is my problem: a concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. if the corresponding object is at a distance of 36.0 cm, what is the mirror's focal length? here's my work: 1/f = 1/v + 1/u where f=focal

asked by physics on March 12, 2009
37. ## Biochemistry

Consider the following kinetic parameter for a given enzyme: Km=4.7x10-5 M Vmax= 22 nmol/min/mg [i]=5x10-1 mM [s]=2x10-4 M Ki=3x10-4 M Calculate the rate of product formation in the presence of a competitive inhibitor. I know that I have to solve for Vo. I

asked by Amelie on November 10, 2007
38. ## chemistry

Consider the following kinetic parameter for a given enzyme: Km=4.7x10-5 M Vmax= 22 nmol/min/mg [i]=5x10-1 mM [s]=2x10-4 M Ki=3x10-4 M Calculate the rate of product formation in the presence of a competitive inhibitor. I know that I have to solve for Vo. I

asked by amelie on November 11, 2007
39. ## Chem

Suppose you wanted to produce an aqueous solution of pH = 8.80 by dissolving KNO2 in water, at what molarity? Here is my work: KNO2 ----> K^+ NO2- NO2^- + H2O ---> HNO2 + OH^- Ka= 4.5 x 10^-4 Ka*Kb=Kw Kb=Kw/Ka kb=10^-14/4.5 x 10^-4=2.222 x 10^-11

asked by Anonymous on March 17, 2018
40. ## Chemistry URGENT

I need help to evaluate if I completed my experiment calculation. determination of water in a hydrate. 1. Mass of crucible, and cover = 18451.3 2. Mass of crucible, cover and sample = 23410.2 3. Mass of crucible, cover and sample after 1st heating =

asked by jazz on April 26, 2014
41. ## meaning of a word

The constitution was an attemt to addrss the problems that existed under the Articles of Confederation. A) list and explain three problems of decentralized power under the articles of confederation. for each problem identify and explain one solution that

asked by apoorva on August 8, 2006
42. ## chemistry

An aqueous solution of cobalt(II) nitrate has a concentration of 0.471 molal. The percent by mass of cobalt(II) nitrate in the solution is %.

asked by jb on August 21, 2014
43. ## CHEMMMM

a solution is 0.10M in free NH3, 0.10M in NH4Cl, and 0.015M in [cu(NH3)4]. Will Cu(OH)2 (s) precipitate from this solution? Ksp of Cu(OH)2 is 2.2810^-20

asked by Jasleen on April 18, 2009
44. ## Chemistry

The solubility of Mg(OH)2 in a particular buffer solution is 0.63g/L .What must be the pH of the buffer solution? I am unsure of where to start since this is the first solubility problem that I've done that has included the density.

asked by Arianna on March 16, 2012
45. ## AP Chemistry

A solution of AgI contains 1.2 mol/L Ag+. Ksp of AgI is 8.3×10^17. What is the maximum I− concentration that can exist in this solution? Answer in units of mol/L

asked by Gabriella on January 8, 2014
46. ## chemistry

A buffer solution is made by dissolving 0.45 moles of a weak acid (HA) and 0.13 moles of KOH into 760 mL of solution. What is the pH of this buffer? Ka = 3.3 × 10−6 for HA.

asked by kc on February 2, 2015
47. ## ap chemistry

A buffer solution is made by dissolving 0.45 moles of a weak acid (HA) and 0.23 moles of KOH into 680 mL of solution. What is the pH of this buffer? Ka = 2.4×10−6 for HA.

asked by gabriella on February 4, 2014
48. ## Chemistry

100g of a saturated solution of KNO3 was cooled from 80 degrees to 50 degrees. What mass of KNO3 would be expected to crystallise out of the solution?

asked by Ally on July 28, 2014
49. ## CNSC

A radiator contains 25 quarts of a water and anti-freeze, of which 60% is antifreeze. How much if this solution should be drained and replaced with water for the new solution to be 40% antifreeze?

asked by Nichelle on August 24, 2015
50. ## Chemistry

What is the concentration of a solution of sodium hydroxide if I mix 15.0g of sodium hydroxide with enough water to make 500.0ml of solution?

asked by Tom on July 13, 2018
51. ## Chem.

I need a 64% solution of ammonium chloride. I have 99% ammonium chloride powder. How many grams of the NH4CL do i need to add to 500 ml of water to get the 64% solution?

asked by John on June 20, 2013
52. ## Chemistry

10 mL of 0.1 HCl was added to 9mL of water. 10 mL of that solution was added to another 90 mL of water. The student diluted the sample as above 1 time(s). What is the pH of the solution?

asked by Keyatta on April 7, 2014
53. ## chemistry

At 25 degrees Celsius the Ka for a 0.120 mol/L solution of acetic acid (HC2H3O2 ) is 1.8 X 10-5. determine the pH of the acetic acid solution

asked by kneLl on November 15, 2010
54. ## calculus

verify that y=c/x^2 is a general solution of the differential equation y'+(2/x) y=0-6y=0 then find a particular solution of the differential equation that satisfies the side condition y(1)=2

asked by mari on April 10, 2012
55. ## chemistry

saline solution mass is 53.0 at 4 degrees equal volume of water, same temp had a mass 51.5g what is the density of the saline solution?

asked by kaela on May 14, 2015
56. ## chem

If 5wt% of silver nitrate solution is required, determine how many grams of silver nitrate is need for an aqueous solution of 100ml.

asked by XiaoHan on July 8, 2015
57. ## chemistry

The density of a 60% (m/m) ethanol solution 0.8937g/ml , calculate the molarity of the solution , step by step . Molar mass of ethanol = 46.07

asked by kaksha on July 29, 2013
58. ## Chemistry

A student intend to prepare 200ml of 0.3M NaCl solution . The mass in gram of NaCl needed to prepare solution is ?!

asked by Mariam on April 20, 2014
59. ## Chemistry

If 15.omL of 0.0250 M aqueous H2SO4 is required to neutralize 10.0 mL of aqueous solution of KOH, what is the molarity of the KOH solution?

asked by Tina on May 23, 2011
60. ## Chemistry

About 13% of the acid in a 0.10M solution of a weak acid dissociates to form ions. What is the H3O+ concentration? What is the OH- concentration? What is the pH of the solution?

asked by Sara on July 18, 2012
61. ## Molarity

A 44.8−mL sample of a 7.0M KNO3 solution is diluted to 1.10L What volume of the diluted solution contains 16.0g of KNO3? Would I do the same thing for this one or would does it have an extra step it it.

asked by Chemistry on April 19, 2015
62. ## chemistry

If 33.0 mL of 0.002 M aqueous H3PO4 is required to neutralize 28.0 mL of an aqueous solution of NaOH, determine the molarity of the NaOH solution.

asked by Anonymous on April 22, 2012
63. ## chemistry

A beaker contains 250.0 mL of a 1.00 M HCl solution. How many moles of the acid would remain in the solution after 0.199 moles of HCl are neutralized?

asked by Jerry on June 13, 2010
64. ## APC Chemistry

Suppose you have a solution containing both an iron (II) salt and an iron (III) salt. How would you proceed to identify both Fe2+ and Fe3+ in this solution?

asked by Anonymous on September 29, 2010
65. ## uitm

Household hydrogen peroxide is an aqueous solution containing 3.0% hydrogen peroxide by mass. What is the molarity of this solution? (Assume a density of 1.01 g/mL.)

asked by jan on July 27, 2013
66. ## Gen chem 1

According to the following reaction, what volume of 0.25 M CaCl2 solution is required to react exactly with 50.0 mL of 0.20 M Pb(NO3)2 solution? CaCl2(aq) + Pb(NO3) (aq)- PbCl2(s) + 2 KNO3(aq).

asked by jenni on March 11, 2013
67. ## algebra

Which has a Unique solution, No solution, or infinitely many solutions? 1. 2X + 3 = 9 2. 9X+ 2 = 9X+ 2 3. (1/2X+3) = (1/3x+9) 4. (x+2)(x+3) = x*x (x squared) + 5x + 6 5. 2(2x+3) = 4x+6 my guess is 1. unique 2. no 3. unique 4. unique 5. infinite 6. infinte

asked by Pam on September 16, 2010
68. ## MATH

Pewee adds two liters of pure alcohol to a 30% solution of alcohol in water. If the new concentration is 40%, how many liters of the original solution were there?

asked by Veronica on May 26, 2010
69. ## high school chem

How many grams of a stock solution that is 92.5 percent h2s04 by mass would be needed to make 250 grams of a 35% by mass solution?

asked by Kayla on March 9, 2011
70. ## Chemistry help

1. Find the pH when there are 0.034 moles of h+ in a liter of solution 2. Find the pH when there are 1.6x10^-7 moles of h+ in 500 ml of solution Please help me on these only problems im struggling with, thank you!

asked by Heather on May 4, 2015
71. ## chemistry

The osmotic pressure of a solution containing 5.00 mg of an unknown protein per 10 mL of solution was 2.73 torr at 25 °C. Find the molar mass of the unknown protein.

asked by lily on September 10, 2011
72. ## SCIENCE

A nitric acid solution at 25% by weight has a density of 1.21 KG / L Calculate the volume needed to be taken to obtain 2 L of a 2.5 M solution of nitric acid

asked by ATTILIA on February 17, 2016
73. ## Chemistry

You wish to prepare 0.18 M HNO3 from a stock solution of nitric acid that is 18.9 M. How many milliliters of the stock solution do you require to make up 1.00 L of 0.18 M HNO3?

asked by Brittany on October 1, 2008
74. ## Chemistry

A beaker with 100 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 6.10 mL of a 0.260 M HCl solution to the beaker. How much will the pH change?

asked by Sandra on March 18, 2011
75. ## Math Exam Tuesday

My friend swears by your site so I thought I'd confirm some of my more difficult answers for my math practice exam. Is the solution set for 8^x = 16^ x+2 is it -2? Next is the solution set for log subscript 5 (2x + 3) = 2 is the answer 7/2? Lastly is the

asked by Sara L. on January 13, 2007

A coin with a diameter of 3.30 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular speed of 16.1 rad/s and rolls in a straight line without slipping. If the rotation slows with an angular acceleration of magnitude

asked by ruby on November 28, 2010
77. ## Chemistry

Consider the titration of 100.0 mL of 0.260 M propanoic acid (Ka = 1.3 ✕ 10−5) with 0.130 M NaOH. Calculate the pH of the resulting solution after each of the following volumes of NaOH has been added. (Assume that all solutions are at 25°C.) (a)

asked by Rina on December 8, 2013
78. ## Mathematics

2. Write an equation to represent the statement: "The product of a number and five plus two is equal to 100." (1 point) A. 5 - x - 2 = 100 B. 5(x - 2)=100 C. 5 x + 2 = 100 D. 5 - 2 x = 100 3. Solve using mental math. (1 point) 5 x - 1 = 14 A. x = 3 B. x =

asked by Connexus Learner on October 30, 2018

q:what kind of economic system does france have? a:france has a mixed economy q:Does France import more than they export or export more than they import? a:export more than they import q:Is france part of a large economic system? a:yes. are these answers

asked by Rebecca on October 11, 2010
80. ## inequalities

A home-based company produces both hand-knitted scarves and sweaters. please help please The scarves take 2 hours of labor to produce, and the sweaters take 14 hours. The labor available is limited to 40 hours per week, and the total production capacity is

asked by Brenda on January 31, 2008
81. ## math/algerbra

What is the equation for finding the midpoint? The midpoint of a line whose end points are (x1, y1) and (x2, y2) is ( (x1 + x2)/2, (y1 + y2)/2 ) hOw dO yOu find the x and y intercept if the equation is nOt in slOpe intercept fOrm? 4+-5=7+8=2 When I doing

asked by Heather on July 19, 2005
82. ## English

HELP PLEASE! WILL MEDAL!!!! Think about the work you completed in your reading character role. Determine the ideas that would be most worthy to share in a literary discussion about the WATSONS GO TO BIRMINGHAM - 1963. Provide an explanation for your

asked by Hey I know that this question isint about language arts but if you go to connections I need some hel on January 9, 2017
83. ## english

think about the work you completed in your reading character role determine the ideas that would be most worthy to share in a literary discussion about dragonwings provide and explanation for your choices how did the rule you selected and the work you

asked by unknownnnnnnnnnnnnn on May 1, 2017
84. ## chemistry

A 2.50-g sample of powdered zinc is added to 100.0 mL of a 2.00-M aqueous solution of hydrobromic acid in a calorimeter. The total heat capacity of the calorimeter and solution is 448 J/°C. The observed increase in temperature is 21.1 °C at a constant

asked by brianna on October 27, 2013
85. ## chemstry

In a constant-pressure calorimeter, 50.0 mL of 0.340 M Ba(OH)2 was added to 50.0 mL of 0.680 M HCl. The reaction caused the temperature of the solution to rise from 23.69 °C to 28.32 °C. If the solution has the same density and specific heat as water,

asked by cassie on June 21, 2012
86. ## Chemistry

In a constant-pressure calorimeter, 60.0 mL of 0.310 M Ba(OH)2 was added to 60.0 mL of 0.620 M HCl. The reaction caused the temperature of the solution to rise from 22.19 °C to 26.41 °C. If the solution has the same density and specific heat as water,

asked by Kylee on October 26, 2014
87. ## chemistry

In a constant-pressure calorimeter, 65.0 mL of 0.330 M Ba(OH)2 was added to 65.0 mL of 0.660 M HCl. The reaction caused the temperature of the solution to rise from 21.91 °C to 26.41 °C. If the solution has the same density and specific heat as water,

asked by rock on February 20, 2015
88. ## Chemistry

Earlier I asked /display.cgi?id=1412727782 (tyvm btw) Say you have these A, B, and C solutions. Now you have an unknown colorless solution that contains either NaA, NaB, or NaC. In solution, each salt dissociates completely into the Na+ ion and the anion

asked by Gg on October 7, 2014
89. ## chemistry

In a constant-pressure calorimeter, 55.0 mL of 0.310 M Ba(OH)2 was added to 55.0 mL of 0.620 M HCl. The reaction caused the temperature of the solution to rise from 22.23 °C to 26.45 °C. If the solution has the same density and specific heat as water,

asked by Haley on November 19, 2014
90. ## CHEMistry

A 2.50-g sample of powdered zinc is added to 100.0 mL of a 2.00-M aqueous solution of hydrobromic acid in a calorimeter. The total heat capacity of the calorimeter and solution is 448 J/K. The observed increase in temperature is 21.1 K at a constant

asked by HELP on March 27, 2013
91. ## CHEM

In a constant-pressure calorimeter, 60.0 mL of 0.340 M Ba(OH)2 was added to 60.0 mL of 0.680 M HCl. The reaction caused the temperature of the solution to rise from 24.07 °C to 28.70 °C. If the solution has the same density and specific heat as water,

asked by Akle on February 10, 2012
92. ## chemistry

In a constant-pressure calorimeter, 60.0 mL of 0.310 M Ba(OH)2 was added to 60.0 mL of 0.620 M HCl. The reaction caused the temperature of the solution to rise from 23.44 °C to 27.66 °C. If the solution has the same density and specific heat as water,

asked by meg on February 23, 2015
93. ## Chemistry

In a constant-pressure calorimeter, 50.0 mL of 0.320 M Ba(OH)2 was added to 50.0 mL of 0.640 M HCl. The reaction caused the temperature of the solution to rise from 23.47 °C to 27.83 °C. If the solution has the same density and specific heat as water,

asked by Ag10 on November 28, 2012
94. ## Science

In a constant-pressure calorimeter, 70.0 mL of 0.330 M Ba(OH)2 was added to 70.0 mL of 0.660 M HCl. The reaction caused the temperature of the solution to rise from 21.27 °C to 25.77 °C. If the solution has the same density and specific heat as water,

asked by Marika on October 10, 2012
95. ## Chemistry

In a constant-pressure calorimeter, 65.0 mL of 0.330 M Ba(OH)2 was added to 65.0 mL of 0.660 M HCl. The reaction caused the temperature of the solution to rise from 24.28 °C to 28.78 °C. If the solution has the same density and specific heat as water,

asked by Emily on August 2, 2015
96. ## Chemistry

In a constant-pressure calorimeter, 60.0 mL of 0.320 M Ba(OH)2 was added to 60.0 mL of 0.640 M HCl. The reaction caused the temperature of the solution to rise from 23.24 °C to 27.60 °C. If the solution has the same density and specific heat as water,

asked by Blaire on February 26, 2013
97. ## Chemistry

In a constant-pressure calorimeter, 50.0 mL of 0.320 M Ba(OH)2 was added to 50.0 mL of 0.640 M HCl. The reaction caused the temperature of the solution to rise from 21.80 °C to 26.16 °C. If the solution has the same density and specific heat as water,

asked by Jay on January 10, 2015
98. ## Physics

A 59 g particle is moving to the left at 29 m/s. How much net work must be done on the particle to cause it to move to the right at 38 m/s? .....i have tried two different ways and gotten the wrong answer. Kinetic Energy = 0.5 * Mass * (Change in

asked by Haley on November 29, 2009
99. ## computer science

9.16 Consider a system that uses pure demand paging. a. When a process first starts execution, how would you characterize the page fault rate? b. Once the working set for a process is loaded into memory, how would you characterize the page fault rate? c.

asked by Anonymous on March 19, 2011
100. ## math, question

what formula did the book use and the set up for it to get this answer for this problem: Problem: Stereo shack sells a stereo system for \$600 down and monthly payments of \$30 for the next 3 yrs. In the interest rate is 1.25% per month on the unpaid

asked by student on June 22, 2007