# Please observe the solution for the following two problems : (a) 2x + 18 = x + 25 (b) 3x + 5 = 7x - 15 (a) 2x + 18 = x + 25 2x - x = 25 -

30,299 questions, page 258
1. ## chem

You need to make up 2 litres of a 4 M solution of sodium chloride. What mass of sodium chloride do you need? (mwt of sodium chloride = 58.44)

asked by dfghjm on March 27, 2015
2. ## Comprehensive secondary school

Determine the mass of copper(ii)trioxonitrate(v) that will be formed when 15grams of copper is added to excess dilute trioxonitrate(v).{cu=63.5,N=14,O=16} solution cu(No3)2=Cu N2 O6 =63.5+14x2+16x6 =63.5+28+96 =187.5 Number of mole=mass/molar mass

asked by Pearl on November 14, 2015
3. ## Economics

Janice is producing a new product at marginal cost of £1, and by law she has to sell it for £2. She has to decide how much to produce before she learns the demand. All she knows is that demand will be 20 or 50, with equal probability. If she is just a

asked by Susan on December 5, 2009
4. ## chemestry

a coin is composed of gold and silver. the 5.00g coin is dissolved in nitric acid and the solution treated with NaCl to precipitate out 2.35g of AgCl. Gold chlorides do not precipitate under the same conditions. What is the composition of silver (by mass)

5. ## Trigonometry

A person on a ship sailing due south at the rate of 15 miles an hour observes a lighthouse due west at 3p.m. At 5p.m. the lighthouse is 52degrees west of north. How far from the lighthouse was the ship at a)3p.m.? b)5p.m.? c)4p.m.? Please Show The Solution

asked by Amber on June 23, 2012
6. ## Chemistry

Hydrogen gas dissolves in palladium with the hydrogen molecules going into the spaces between the metal ions. Determine the molarity, molality, and percent by mass of the H2:Pd solution (d=10.8g/cm)containing 0.94g hydrogen gas dissolved in 215 grams of

asked by James on February 17, 2012
7. ## Chemistry

A solution of transferrin exhibits an absorbance of 0.463 at 470 nm in a 1.000-cm cell. Calculate the concentration of transferrin in mg/mL and the concentration of bound iron in μg/mL. At wavelength 428(nm), molar absorptivity of transferrin is 3540, at

asked by Anonymous on December 14, 2011
8. ## Chemistry

How much mg of iron are there in 100g of spinach. if we burned 5.20g of spinach and added 10 ml of 2.0 M HCl into the spinach ashes.Then filtered the ashes and used 5 ml of that solution to put it in a testube and added 5 ml of 1.5 M KSCN in the testube.

asked by Jason on November 14, 2016
9. ## Linear Algebra

Consider the following system of linear equations: 2x1+2x2+4x3 = −12 x1+6x2−8x3 = −6 x1−2x2+9x3 = −8 Let A be the coefficient matrix and X the solution matrix to the system. Solve the system by first computing A−1 and then using it to find X. I

asked by sal on October 20, 2018
10. ## chemistry- titration

Once you have calculated your Ka value, use the data to find the concentration of the unknown acids. Vol. of acid solution=25mL concentration of NaOH used = 1M Buffer (pH) = 8.35 at 11.5mL 1/2 11.5=5.75mL which is a pH of 3.58 I did pH=pKa + log(acid/base)

asked by Amber on May 27, 2015
11. ## Chemistry

A metallurgist decomposes an unknown ore to the following metals. What is the chemical formula of the ore? (Show all the chemical equation and solution steps) ore = x metal products from ore decomposition: Al: 162.0 grams Sb: 730.8 grams Ag: 1,294 grams

asked by jermain 32 on February 2, 2012
12. ## Chemistry Honors

In a science lab, acids and bases are often stored in high concentration "stock" bottles and then diluted as needed. If 100 mL of a 12 M solution of HCl is diluted to a final volume of 500 mL, what would be the final concentration of the diluted HCl?

asked by Amber M. on June 2, 2018
13. ## Algebra (Intermediate)

5. Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 9x + 6y = 60 -27x Ð 18y = -180 Here's where I am at now: 9x(3) + 6y(3) = 60 27x +18y + 60 27 x + 18y = 60 -27x -18y = 180

asked by JerryJ on October 11, 2010
14. ## chemistry

Okay so the question is: what would be the molarity of a saturated aqueous solution of NaI prepared at 25 C, assuming that the added NaI does not add significantly to the volume of the water? My question is, I got confused on what formula I use to for the

asked by Unknown on June 10, 2015
15. ## Chem

HCl is slowly added to a solution that is .250 M in Pb^2+ and .00150 M in Ag+. Which precipitate forms first, PbCl2 or AGCl? At what Cl- ion concentration will the precipitate first appear? Ksp for PbCl2= 1.6*10^-5, Ksp for AgCl= 1.7*10^-10 Seriously don't

asked by TS on May 9, 2016
16. ## Chem-BufferQ

You have a solution of .5 L of 1.74g of NH3 and 4.15g of (NH4)2SO4. How many ml of 14M HCl is required for a pH of 9.00? I don't know how to go finish this one. I thought about figuring the concentrations of each (NH3, NH4), making an ice table and solving

asked by Matt on November 14, 2011
17. ## Chemistry test HELP!

A/an _____ solution is able to dissolve more solute. Choices: insoluble immiscible soluble unsaturated saturated supersaturated osmosis reverse osmosis semi-permeable membrane non-volatile boiling point freezing point capillary tubes atmosphere volatile

asked by Angel on May 30, 2008
18. ## Science

To solve the problem of a polluted stream a scientist traced where the pollution came from. She determined that the pollution was coming from many small sources. She worked on a plan to help reduce the pollution to the stream. This is an example of

asked by Amy on May 25, 2014

Can anyone please show me the calculation for these problems: Burlin Company starts the year with $100,000 in assets and$80,000 in liabilities. Net Income for the year is $25,000, and no dividends are paid. How much is owner’s equity at the end of the asked by Peaches on September 13, 2009 20. ## chem sorry . Can you please help me with this questions If you know? Oxalic acid is a relatively strong diprotic acid with Ka1 = 5.6 ´ 10-2 and Ka2 = 5.1 ´ 10-5. What is the C2O42- concentration in a solution that is 0.10 M in oxalic acid and 1.0 M in HCl? asked by khin on June 19, 2010 21. ## Organic Chemistry Why is 4-chlorophenol soluble in 2.5M NaOH solution, but not in water? A. Phenol is a weak acid so it can be deprotonated under basic conditions. B. Aqueous acid destroys 4-chlorophenol. C. 4-chlorophenol is only soluble in water at low temperature. D. A asked by nilee on March 6, 2009 22. ## math exactly how many cubic inches of ice cream can an ice cream cone hold (within the cone) if its height is 6 inches and the radius of its base is 2.5 inches? include correct units with the solution. use "pi" in place of the pi symbol. asked by jenna on July 3, 2011 23. ## chemisty 0.100 M solution of a weak acid, HX, is known to be 15% ionized. The weak acid has a molar mass of 72 g/mol. 1. What is Ka for the weak acid? 2. What is the pH of the buffer prepared by adding 10.0 g of the sodium salt of the acid (NaX) to 100.0 mL of asked by Clayton on April 4, 2012 24. ## Composition II Hi, I have to write tesis statement for a reasearch paper we will later write. For my thesis statement, I have to ask a quesiton about an ethical problem in society(not a yes or no question, and something new, not a common issue) and come up with a NEW asked by Lora on March 1, 2018 25. ## Math Graph the equations below accurately. Find the point of intersection of the two lines. You will type your x value in the first part and the y value in the second part of the question. If the answer if no solution then type NS in both parts and if the the asked by Samay on November 27, 2017 26. ## Chemistry-Dr Bob help!! 0.100 M solution of a weak acid, HX, is known to be 15% ionized. The weak acid has a molar mass of 72 g/mol. 1. What is Ka for the weak acid? 2. What is the pH of the buffer prepared by adding 10.0 g of the sodium salt of the acid (NaX) to 100.0 mL of asked by clayton on April 4, 2012 27. ## Chemistry An aqueous solution of 0.25 M silver nitrate, AgNO3, and 0.25 M iron(II) nitrate, Fe(NO3)2, are allowed to come to equilibrium in the following chemical reaction: Ag+(aq) + Fe2+(aq) Fe3 + (aq) + Ag(s) If the equilibrium constant, Kc, for the reaction asked by Cortney on April 7, 2015 28. ## English I wrote my Book Review: Pride and Prejudice I would like someone correct my grammar mistakes.180 words Thanks so much Pride and Prejudice Pride and Prejudice was written about 200 years back by Jane Austen. It is a romantic love story about the pride of a asked by Eliz on October 9, 2017 29. ## Algebra Could someone correct my answers and help with the other problems? 1. Are the following lines parallel, perpendicular, or neither? L1 with equation x – 5y = 10, L2 with equation 5x + y = 5. Answer: Neither (I'm not to sure but i think this is the right asked by Noah on May 28, 2007 30. ## Algebra The (absolute value) x-20 (absolute value) is less than or equal to 6. I did it first with six positive and got x is lesss than or equal to 26. Then I made the six negative and got x is less than or equal to 14. But this is impossible for these to both be asked by Andrea on October 12, 2009 31. ## Physics In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture. The tire remains stationary in spite of the three pulls. Alex pulls with force of magnitude 207 N, and Charles pulls with asked by Molly on March 1, 2014 32. ## algebra 1 Natalie performs a chemistry experiment where she records the tenperture of an ongoing reaction.The solution is 93.5 C after 3 minutes;90 C after 5 minutes,84.8 C after 9 minutes; 70.2 C after 18 minute; 54.4 C after 30 minutes;42.5 C after 37 minutes; and asked by Janet on October 24, 2012 33. ## chemistry How would you prepare a 150.0mL of a 3.50 pH buffer solution using .500M NaOH and .500M HCOOH. I've gotten the base/acid ratio for the Henderson-H. equation. But now I'm not sure how to figure out the balance of solutions of HCOOH and NaOH to get both asked by Israel on March 7, 2011 34. ## physics A block starts with a speed of 18.0 m/s and slides for a distance of 2.2 m down a 40° ramp (muk = 0.43). What is its final speed? (m/s) Thanks for suggeting the following solution. The block starts with an initial speed of 18.0 m/s.Does it have any asked by sandhu on November 28, 2010 35. ## Chemistry A zinc-copper battery is constructed as follows. Zn | Zn2+ (0.70 M) || Cu2+ (2.30 M) | Cu The mass of each electrode is 200. g. (a) Calculate the cell potential when this battery is first connected. 1 V (b) Calculate the cell potential after 10.0 A of asked by Amy on March 29, 2009 36. ## Chem Phenol is a weak acid. We take 3.7 grams of phenol and dissolve it in 65 ml of water. To that water we add 40 ml of a 0.52 M solution of NaOH. You will need to look up the Ka value for Phenol a. What is the pH when the phenol is dissolved in the 65 ml of asked by Jordan on November 13, 2016 37. ## Chemistry After balancing the following redox equation(using small whole-number coefficients), add the coefficients of all species in the balanced equation. Bi(OH)3 + SnO2^(2-) → Bi + SnO3^(2-) (basic solution) --- I separated the equation into two and i know the asked by Lucy on May 7, 2017 38. ## Math A 100 gallon tank is filled with a salt solution containing 10 lbs of salt. Pure water is pumped in at a rate of 5 gallons per minute and pumped out at the same rate. How many minutes will it take the amount of salt to drop to 8 lbs? Round to one decimal asked by Molly on December 5, 2016 39. ## CHEMISTRY Suppose a student adds 25.00 mL of 1.025 M HCl to a 1.50 g antacid tablet. The student boils and then titrates the resulting solution to the endpoint with 0.4969 M NaOH. The titration requires 21.3 mL NaOH to reach the endpoint. How many moles of HCl were asked by Jo on April 23, 2013 40. ## CHEMISTRY Suppose a student adds 25.00 mL of 1.025 M HCl to a 1.50 g antacid tablet. The student boils and then titrates the resulting solution to the endpoint with 0.4969 M NaOH. The titration requires 21.3 mL NaOH to reach the endpoint. How many moles of HCl were asked by Sarah on April 22, 2013 41. ## Chem Assume the volume of a filter flask is 250.0mL. You have added (25.0 + 10.0)mL of solution so the volume of gas is (250.0 - 35.0) = 215.0mL. Calculate the extra volume of gas forced into the burette because of the measured average temperature of 23 degrees asked by Alix on October 20, 2010 42. ## chemistry - vapor pressure the vapor pressure of pure water at 25C is 23.8 torr. determine the vapor pressure (torr) of water at 25 C above a solution prepared by dissolving 35g of urea (a nonvolatile, non-electrolyte, MW = 60.0G/MOL) IN 76G of water. answer:21 i just want to know asked by billy on September 13, 2010 43. ## Chemistry 2 - Acids and Bases Hydrazine (NH2NH2) is a weak base that ionizes in water as follows. NH2NH2(aq) + H2O(l) HNH2NH2^+(aq) + OH^−(aq) Calculate the concentration of OH^− ions in a 0.20 M solution of hydrazine, given that the base-dissociation constant (Kb) for hydrazine is asked by Jamie on February 28, 2018 44. ## mastering chemistry A solution of volume 80.0 mL contains 16.0 mmol HCHO2 and 9.00 mmol NaCHO2. If 1.00 ml of 12 M HCl is added to this, what will be the resulting pH? (the only problem im having for this question is how to approach it, i know that by adding HCl the asked by chma11 student on February 28, 2009 45. ## Grade 12 Chemistry Caprytic acid, also called octanoic acid, is an 8-carbon fatty acid that is used as a sanitizer on dairy equipment that comes in contact with milk.The acid has a molar mass of 144.21 g/mol. An aqueous solution of the sanitizer containing 12.25 g/L has a pH asked by Anonymous on January 5, 2014 46. ## Chemistry In a silphuric acid (H2SO4)-Sodium Hydroxide (NaOH) acid-base titration, 17.3mL of 0.126M NaOH is needed to neutralize 25mL of H2SO4 of unknown concentration. What is the morality of the H2SO4 solution? H2SO4 (aq)+ NaOH (aq) = Na2SO4 (aq) + H2O (l) asked by Dawn on July 1, 2014 47. ## Chemistry Question: When 1.97 grams of Pb(OH)2(s) is added to 1.00 liter of pure water at 25 C a saturated solution (some solid is present) is formed that has a pH of 8.97. Compute the Ksp value for Pb(OH)2 using the data. How do i go about getting the Molarity from asked by Eliz on May 11, 2009 48. ## Chemistry Calculate the molarity of the nitrate ion in a 0.111 M solution of calcium nitrate? so would I have to find the number of moles of (NO3)2 and then divide it by the 0.111 M to get the molarity of the nitrate ion I am so confused please explain the set up I asked by Amber on March 22, 2013 49. ## college The radiator in a certain make of car needs to contain 20 liters of 40% antifreeze. The radiator now contains 20 liters of 20% antifreeze. How many liters of this solution must be drained and replaced with 100% antifreeze to get the desired strength? asked by Kristina on October 4, 2009 50. ## Math 6 m of soil containing 50% clay was mixed into 10 m of soil containing 10% clay. What is the clay content of the mixture? How much salt should be added to 80 pounds of a 5 % salt solutio to make it a 24% salt solution Thank you so much! asked by Marina on October 26, 2015 51. ## Chemistry When 200 mL of an aqueous benzoic acid solution were extracted with 30 mL of ethyl actetate 45% of the benzoic acid were extracted. Calculate the partition coefficient of benzoic acid. asked by Nick on September 27, 2018 52. ## U.S. History 1865 Can someone please help me with this question? Why was the Bank War significant? Why did the Bank War reinforce and justify the two-party system? Here is what I have so far: During the year 1832 the Second Bank of the United States become very important to asked by B.B. on July 3, 2009 53. ## chemestry Balance th following equation in acid Solutiong and determind if it is spontaneous under standard conditions. NO3^-1 + Sn^+2 ---> NO + Sn^+4 balanced directed to first post. You need to calculate the E value to determine if it is spontaneous or not. Please asked by bik on May 16, 2007 54. ## English 1. The voice of the speaker in this passage is not Jonathan Swift. Much like a poem can have a speaker who is not the poet, the author takes on a persona to narrate this proposal for Ireland. What are distinct charcteristics of the persona that Swift asked by Rosalie on April 7, 2019 55. ## chemistry an ezyme -catalysed reaction was carried out in a solution buffered with 0.05 M phosphate ph 7.2 . As a result of the reaction ,0.06M of acid was formed. (phosphoric acid has three pka values. The one required for this calculation is pka2=7.2). 1) what was asked by josh on January 12, 2016 56. ## chemistry An unknown was prepared with the concentration of 0.000630 M. A Beer's Law plot was prepared using the absorbance values from standard solutions of ASA and a line drawn through all the points passed through the origin with a slope of 1550.2 M–1 . The asked by ChemLover on April 14, 2011 57. ## Calculus and Vectors An aircraft pilot wishes to fly from an airfield to a point lying S20oE from the airfield. There is a wind blowing from N80oE at 45 km/h. The airspeed of the plane will be 550 km/h. (a) What direction should the pilot steer the plane (to whole degree)? asked by Bobby on October 1, 2018 58. ## Chemistry An unknown was prepared with the concentration of 0.000630 M. A Beer's Law plot was prepared using the absorbance values from standard solutions of ASA and a line drawn through all the points passed through the origin with a slope of 1550.2 M–1. The asked by Anonymous on January 24, 2010 59. ## Alg 1 Factoring to solve quadratic equations: Use the Zero-Product Property to solve each equation. Write your solution in roster form: The volume of a storage tub shaped like a rectangular prism is 24 ft^3. The height of the tub is 3 feet. The width is w feet asked by Jane on April 8, 2013 60. ## chem An unknown was prepared with the concentration of 0.000630 M. A Beer's Law plot was prepared using the absorbance values from standard solutions of ASA and a line drawn through all the points passed through the origin with a slope of 1550.2 M–1 . The asked by eve on April 19, 2009 61. ## Chemistry A 1.0-mL volume of 0.010 M H2SO3 is added to a mixture of 12 drops of 0.010 M HIO3, 8 drops of deionized water, and 1 drop of starch solution. a color change occured after 40 seconds. assuming 25 drops per mL for all solutions, determine the initial molar asked by Anonymous on February 21, 2013 62. ## Chem Potassium permanganate (KMnO4) solutions are used for the determination of iron in samples of unknown concentration. As a laboratory assistant, you are supposed to prepare 200. mL of a 0.300 M KMnO4 solution. What mass of KMnO4, in grams, do you need? I asked by Anonymous on October 5, 2012 63. ## Chemistry A 0.41 g sample of limestone was dissolved in HCl and all the calcium in the limestone was converted to Ca2+(aq). The solution was treated with excess ammonium oxalate, (NH4)2C2O4(aq), and it was found that 3.0 g of calcium oxalate, CaC2O4(s) was asked by Bob on September 20, 2012 64. ## English Hi for my english class, we have to make an invention using cheap material that is useful, original, and provides a solution to a problem. We actually have to show the class like a prototype of it and I have no idea what to do! Mines on tuesday and I'm so asked by John on December 5, 2010 65. ## Chemistry DrBob This is what i posted up a while back... i got to a using 0.520= a (.202M) and got a= 2.57 but now i don't know where to go from there with the ICE The standard solution of FeSCN2+ (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M asked by Amy on April 12, 2008 66. ## math Mr.Jacobsen wants to hire a magician for his son's birthday party. Marion has a travel fee of$30 and charges $15 per hour. Gregory has a travel fee of$50 and charges \$10 per hour. Define a variable. Then write a system of equatins to represent the

asked by Jane on November 26, 2012
67. ## chemistry - Science

A zinc-copper battery is constructed as follows (standard reduction potentials given below): Zn | Zn2+ (0.10 M) || Cu2+ (2.50 M) | Cu Zn2+ + 2 e- → Zn(s) Eº = -0.76 V Cu2+ + 2 e- → Cu(s) Eº = 0.34 V The mass of each electrode is 200 g. Each half-cell

asked by Ana on May 3, 2014
68. ## chem

The following equation describes the oxidation of an acidified solution of sodium oxalate (Na2C2O4) by potassium permanganate(KMnO4) 5C2O4 + 2MnO4 + 16H2SO4 --> 10CO2 + 2Mn + 16HSO4 + 8H20 What volume of 0.127M sodium oxalate in sulphuric acid will react

asked by tomi on April 7, 2009
69. ## CHEM

am lost. I have to create a buffer using NH4CL and 0.10 M NH3. I have to chose how much of the reagent to use in order to get a concentration between 0.01 and .5 M. Then after I come up with the recipe for that I have to calculate the pH based on the

asked by Erica on April 5, 2016
70. ## Chemistry

During recrystallization, an orange solution of a compound in hot alcohol was treated with activated carbon and then filtered through fluted paper. On cooling, the filtrate gave gray crystals, although the compound was reported to be colorless. Explain why

asked by Vivian on September 28, 2014
71. ## chemistry

"What mass of silicon carbide should result when 100.00g of silicon dioxide reacts with excess 100.00g of carbon?" SiO2 + 3 C = 2 CO + SiC (balanced) Direct question from homework; I was wondering if someone could explain how to find the solution with

asked by h. marie on May 7, 2017
72. ## chemistry

When 0.949 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 389C 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. what is molar heat of reaction, Hrxn,

asked by blasting on February 15, 2010
73. ## Chemistry

Write the balanced chemical equation for each of these reactions. Include phases. When aqueous sodium hydroxide is added to a solution containing lead(II) nitrate, a solid precipitate forms. However, when additional aqueous hydroxide is added the

asked by Sarah on May 11, 2012
74. ## Chemistry

A sample of KHC2O4 weighing 0.5839 g is dissolved in 25 mL of water and an endpoint is reached when 31.99 mL of KOH has been added. Calculate the molarity of the KOH solution. KHC2O4(aq) + KOH(aq) ¨ K2C2O4(aq) + H2O(l) because the coefficents are all

asked by Andrew on January 9, 2008
75. ## physics

A flock of ducks is trying to migrate south for the winter, but they keep being blown off course by a wind blowing from the west at 11{\rm m/s} . A wise elder duck finally realizes that the solution is to fly at an angle to the wind.If the ducks can fly at

76. ## AP Chem

Hey guys! I'm not really stuck on this problem, but I was wondering if someone could look it over to make sure that what I did makes sense. Thank you: 1) Balance this equation. What is the coefficient in front of I2? IO− + I− --> I2 in acidic solution

asked by Allie on October 25, 2015
77. ## chemistry

At 300.K and 1.00 atm, assume that 25 mL of NO gas reacts with 22 mL of oxygen gas and excess water to produce nitric acid according to the following equation: O (g) H O(l) 2 HNO (g) 2 2NO(g) 3 + 2 + 2 ⎯⎯→ 3 . If all of the nitric acid produced by

asked by bob on March 21, 2010
78. ## Science

How could I estimate how long osmosis takes to occur in a potato? Will it depend on the salinity of the solution it is submerged in? Were I to make a prediction on how long it would take for osmosis would occur in my lab, how could I scientifically prove

asked by Anonymous on February 5, 2011
79. ## chemistry - Science

A zinc-copper battery is constructed as follows (standard reduction potentials given below): Zn | Zn2+ (0.10 M) || Cu2+ (2.50 M) | Cu Zn2+ + 2 e- → Zn(s) Eº = -0.76 V Cu2+ + 2 e- → Cu(s) Eº = 0.34 V The mass of each electrode is 200 g. Each half-cell

asked by Ana on May 3, 2014
80. ## chemistry

When 3.2 g of ammonium chloride is dissolved in 75 g of water, the temperature of the solution decreases from 22.8°C to 20.1°C. What is the energy of dissolution of NH4Cl per mole? (The molecular mass of NH4Cl = 53.49 g/mol, and the specific heat of

asked by Morgan on December 11, 2014
81. ## Math

22. Industrial Designs has been awarded a contract to design a label for a new wine produced by Lake View Winery. The company estimates that 150 hours will be required to complete the project. The firm’s three graphics designers available for assignment

asked by Saly on August 22, 2017
82. ## Project Management

Case Study: Calcutta's Metro In 1996, Calcutta’s long-waited metro finally opened to a collective sigh of relief from the long-suffering population of this large Indian city. Critics had long derided the project a one of the “slowest-moving” public

asked by animal on October 5, 2008
83. ## ~CHEM~

If I had an equilibrium of CH3CO2(aq) + H(aq) CH3CO2H(aq) and the applied stress was HCl and NaOH what observations should I expect and what direction would the equliibrium shift? Same goes to this question equilibrium:Fe(aq) + SCN(aq) FeSCN(aq) the

asked by Jason on May 16, 2007
84. ## pre-cal

Solve. (sqrt. x + 1) - (sqrt. 2x -12) = 1 The answers I reached were x = 8 and 24. If you plug in 8, you will get 1 as an answer. If you plug in 24, however, you will not get 1 as an answer. Please see if 8 is the only solution. If not, please show me how

asked by lauren on October 21, 2008
85. ## math

Sketch the graph of a quadratic function for which the related quadratic equation has only one solution. Then, sketch one that has two solutions. Explain how you know by looking at the graph the number of solutions there are.

asked by candy on July 7, 2011
86. ## Precalculus

I know I posted this but I have some questions.. So is the general solution: theta= +/- 222+360k Then is it legal to .... -222+360(1)???? 222+360(0)=222(just like your answer) How come there is only one answer????

asked by Anonymous on November 15, 2013
87. ## Algebra 1

1.) Which best describes a system of equations that has no solution? •consistent, independent •inconsistent, dependent •consistent, dependent •inconsistent* ANSWER: D Please check my answer, thank you!

asked by Anon on December 9, 2016
88. ## MATH

Sketch the graph of a quadratic function for which the related quadratic equation has only one solution. Then, sketch one that has two solutions. Explain how you know by looking at the graph the number of solutions there are.

asked by Anonymous on September 15, 2009
89. ## chemistry(buffer solutions)

Calculate the pH of the buffer solution that would be ormed by mixing 500cm3 of 0.1mol/dm3(aq)ammonia with 500cm3 off 0.1mol/dm3(aq)ammonia chloride.

asked by Heather on May 15, 2017
90. ## Chemistry

Calculate the vapor pressure of a solution of 33.0 g of gylcerol (C3H8O3) in 500g of water at 25 degrees C. the vapor pressure of water at 25 degrees C is 23.76 torr

asked by Missy on October 18, 2010
91. ## Math - Percents

Polly mixes 2 gallons of windshield wiper fluid with 8 gallons of water. The resulting solution is made up of k% windshield wiper fluid. What is the value of k?

asked by Venus on September 13, 2013
92. ## Chemistry

Calculate the pH of: a) ammonia, 0.1M, in water b) ammonium chloride, 0.1M, in water c) a buffer solution containing ammonia (0.1M)and ammonium chloride (0.01M) For NH4^+, pKa = 9.25

asked by Abby on September 26, 2008
93. ## Math

In examination, 60 % of candidates failed, the number of candidates who passed was 500. Find the number that failed. Solution :60 /100*500 =300

asked by Yaro on October 2, 2016
94. ## science

If the country is not increasing in population growth rate, what are some socio/economic problems that might occur? In such a situation, the average age of the population increases and, unless there is an actuarily sound retirement funding program (instead

asked by Fallon on November 29, 2006
95. ## algebra

geometric dot pattern. 1+2+...+80 I'm not sure what the question is, to add up the numbers from 1 to 80? If it is this is an extremely old problem. If you use the progression o 1 dot____ ..o ..oo 3 dots___ .....o .....oo .....ooo .....oooo 4dots____ the

asked by jaznai on September 12, 2006
96. ## math

An art student wants to make a model of the classroom. The length of the classroom is 2.4 times its width. The length of the students model is 42 in. What should the width of the model be? a. 17.5 in b. 20.5 in c. 83.6 in d. 100.8 in Use mental math to

asked by Abby on September 24, 2014
97. ## Chemistry

What is the concentration of an unknown sulfuric acid solution if 0.2M Sodium hydroxide is titration to neutralize the acid? The initial volume of the Sodium hydroxide is .50ml and the final volume is 30.75 ml. There is 35mL of acid.

asked by Tom on July 13, 2018
98. ## math

how many cubic inches of ice cream can an ice cream cone hold (within the cone) if its height is 7 inches and the diameter of its base is 3 inches? give solution accurate to the nearest hundredth.

asked by jenna on July 3, 2011
99. ## math 2 trigonometry

give me the solution from the top of a building the angle of depression of a point on the same horizontal plane with the base of the building is observed to be 60 degree what will be the angle of depression of the same point when viewed from a position one