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September 30, 2014

# Search: is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase

Number of results: 30,265

Chemistry II
The enthalpy of neutralizatino for the reaction of a strong acid with a strong base is -56 kJ/mol of water produced. How much energy will be released when 230.0 mL of 0.400 M HCl is mixedwith 150.5 mL of 0.500 M NaOH? How do I figure out how much water is produced in the ...
May 20, 2007 by Jayd

Science
Am I correct with my answeres below? During which hours of the day is the earth's emitted radiation highest and Why? My Answer: I think it is in the afternoon because of the increase in surface temperature. Why are values of LW^ higher in the summer than in the winter? My ...
March 9, 2009 by Mama Mia

chemistry
why wouldn't a higher experimental ratio of HCl increase the reaction rate for synthesis of t-pentyl alcohol?
March 20, 2013 by Anonymous

College Chemistry
Given 20 mL NaOH; 0.1 M, add 0.05 M HCl, 10 mL at a time. What is the pH initially of NaOH? What is the pH after adding 10 mL 0.05 M HCl? What is the pH after adding 20 mL 0.05 M HCl? What is the pH after adding 30 mL 0.05 M HCl? What is the pH after adding 40 mL 0.05 M HCl? ...
July 7, 2010 by Erika

Chemistry
A quantity of 100 mL of .5M of HCl (aq) is mixed with 100 mL of .5M of NaOH (aq) in a constant pressure calorimeter. The initial temperature of the solutions is 22.30 C and the final temperature of the mixed solution is 25.00 C. What is "q" for solution and "q" for reaction?
April 8, 2012 by Dante

chemistry
A volume of 100mL of 1.00 M HCl solution is titrated with 1.00 M NaOH solution. You added the following quantities of 1.00 M NaOH to the reaction flask. Classify the following conditions based on whether they are before the equivalence point, at the equivalence point, or after...
August 6, 2012 by Anon

Chemistry
Why does the voltage increase when ammonia is added to a Cu2+ cell??
March 16, 2011 by Anonymous

Chemistry
1. Isolation of aniline by steam distillation. (a) Why is NaOH added before performing thedistillation? (b) Suggest a reason for the milky appearance of the distillate and for the change in appearance upon addition of HCl. After having isolated the reduction product, aniline, ...
October 19, 2006 by Lindz

Mathematics
Hi, I dont like asking for help .. can someone check my work please ? In a biometric system under testing there are 500 users. 200 were legitimate users (authorised), and 300 were not ( unauthorised) At one threshold the system:- Shut out 10 individual users it should have ...
May 30, 2011 by Fred

Biometrics
Hi, I dont like asking for help .. can someone check my work please ? In a biometric system under testing there are 500 users. 200 were legitimate users (authorised), and 300 were not ( unauthorised) At one threshold the system:- Shut out 10 individual users it should have ...
May 31, 2011 by Fred

Barometric Pressure
I have been studying the reduction in barometric pressure and temperature with height and am happy with my findings ref temperature. With regard to pressure I read that for every increase in altitude of 32 feet the pressure drops 1 mb. For every increase in height of 1000m the...
August 28, 2006 by mike

Chemistry - Solubility
INFORMATION: [HCl] = 0.1388 M We placed 0.5 g Ca(OH)2 in 100 mL of the following solutions: Flask A: Distilled Water (7.4 mL of HCl needed to titrate) Flask B: 0.05 M NaOH (7.5 mL of HCl needed to titrate) Flask C: 0.025 M NaOH (10.8 mL of HCl needed to titrate) Flask D: 0....

Science
Any help would be appreciated! Which of the following is a way to improve the efficiency of a heat engine? increase Qh reduce Qh reduce Wnet increase Qc A What are the energies associated with atomic motion called? kinetic energy potential energy bond energy internal energy D ...
January 18, 2012 by Anonymous

Science
Any help would be apreciated! Which of the following is a way to improve the efficiency of a heat engine? increase Qh reduce Qh reduce Wnet increase Qc A What are the energies associated with atomic motion called? kinetic energy potential energy bond energy internal energy D A...
January 19, 2012 by Anonymous

High School Chemistry
10mL of 0.10M HCl is given. What is the pH? How many milliliters of 0.10M NaOH would be required to neutralize it? What is the pH of the neutralized solution? What would the pH of the solution be if you added 20mL of NaOH? Here's what I have so far: pH of HCl=-log(0.10M)= 1 ...
March 21, 2011 by Becky

Chemistry
What volume of 6M HCl and 2M HCl should be mixed to get 2 litres of 3M HCl?
April 29, 2010 by Sreeraag

Chemistry
I am pretty good at balancing oxidation reduction problems, but I can't do this one: HIO3 + FeI2 + HCL -> FeCl3 + ICl + HOH 5HIO3 + 4FeI2 + 25HCl -> 4FeCl3 + 13ICl + 15HOH I separated the three redox equations, added the two oxidation reactions together, then balanced ...
February 2, 2007 by Brendan

Econ
A firm is considering locating a 100 employee microprocessor production facility in one of Aland’s cities. The products this firm will produce are expected to be exported to other places (other cities within and outside the country). City planners think it is possible that the...
November 29, 2010 by Candie

Chemistry
A buffer is made up of .300 L each of .500 M KH2PO4 and .317 M K2HPO4. Assuming tha the volumes are additive, calculate a) the pH of the buffer b) the pH of the bugger after the addition of .0500 mol of HCl to .600 L of the buffer. c) the pH of the buffer after the addition of...
May 1, 2007 by James

math
Hi, I had a question about exponential growth. The problem says: The population in Woonsocket is 43,500. Every year the population increases by 2%. Write the exponential equation that represents this situation. I put that the equation was 43,500 (1+.2)^y (y standing for how ...
March 4, 2008 by Juliana

chemistry
A 0.500 L solution of 7.50 M hydrochloric acid is used to neutralize a 250.0 g sample of calcium hydroxide. Calcium chloride – a chemical used to control highway dust, strengthen concrete mixes, and add flavor to foods – is produced by the reaction. 2 HCl + Ca(OH)2 → ...
March 1, 2010 by BT

Chemistry
How many moles of HCl must be added to 100mL of a 0.100 M solution of methylamine (pKb=3.36) to give a buffer having a pH of 10.0?
April 24, 2011 by Joe

chem
If 1.0 L of 0.2 M Ca(OH)2 is added to 2.5 L of 0.1 M HCl, the pH of the final solution is? can someone show me the working out of this question? im very confused by it. thankyou
August 18, 2011 by an

Chemistry
Calculate pH when 0.060 mols of HCl are added to 1.000 L of a buffer containing 0.499M KH2PO4 and 0.193M K2HPO4
February 10, 2012 by Jenn

chem
A student placed 12.0grams of glucose in a flask added enough water to dissolve glucose by swirling then added additional water until the .100 ml mark. A 60.0ml sample of this glucose soon was diluted to 0.500 L. How many grams of glucose are in 100. ml of the final solution.
September 19, 2011 by ALISON

Calculus
The temperature of a cup of Starbucks coffee at time t (in minutes) is T(t)= 70 + c e^(-kt) . Initially, the temperature of the coffee was 200 degrees F. Three minutes later, it was 180 degrees. When will the temperature of the coffee be 150 degrees F? The back of the book ...
November 10, 2009 by Bill

Chemistry - Solubility
INFORMATION: [HCl] = 0.1388 M We placed 0.5 g Ca(OH)2 in 100 mL of the following solutions: A 25 ml aliquot was used Flask A: Distilled Water (7.4 mL of HCl needed to titrate) Flask B: 0.05 M NaOH (7.5 mL of HCl needed to titrate) Flask C: 0.025 M NaOH (10.8 mL of HCl needed ...

Physical Science
You submerge 100 grams of steel in 200 grams of water. If the steel has an initial temperature of 80°C and the water has an initial temperature of 10°C, what is the final temperature of the system? The specific heat capacity of the steel is 0.15 cal/g•°C
October 12, 2012 by Connor

Chemistry
A solution is prepared by adding 50.3 mL of concentrated hydrochloric acid and 16.6 mL of concentrated nitric acid to 300 mL of water. More water is added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution. [Hint: Concentrated HCl is 38% HCl...
February 28, 2012 by Andre

Chemistry
A solution is prepared by adding 47.3 mL of concentrated hydrochloric acid and 16.3 mL of concentrated nitric acid to 300 mL of water. More water is added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution. [Hint: Concentrated HCl is 38% HCl...
May 21, 2012 by Andrew

Chemistry
A swimming pool 20.0m *12.5 is filled with water to a depth of 3.5m. if the initial temperature of water is 18.4C how much heat must be added to the water to raise its temperature to 29.0C? Assume that the density of water is 1.000g/mL
February 21, 2010 by Anonymous

chemistry
A swimming pool, 20.0 m 12.5 m, is filled with water to a depth of 3.73 m. If the initial temperature of the water is 17.7°C, how much heat must be added to the water to raise its temperature to 28.7°C? Assume that the density of water is 1.000 g/mL.
March 26, 2011 by nicole

Chemistry
A swimming pool, 20.0 m 12.5 m, is filled with water to a depth of 3.73 m. If the initial temperature of the water is 18.5°C, how much heat must be added to the water to raise its temperature to 28.5°C? Assume that the density of water is 1.000 g/mL.
March 27, 2013 by Chuck

one more question
how would you describe change in a arrangement of particles as heat energy and temperature increases. here is my answer: temperature increase makes particles move faster and spread a part Please edit
October 22, 2007 by bellas mom

chemistry
A biology experiment requires the preparation of a water bath at 37.0°C (body temperature). The temperature of the cold tap water is 22.0°C, and the temperature of the hot tap water is 55.0°C. If a student starts with 70.0 g of cold water, what mass of hot water must be added ...
November 10, 2010 by Anonymous

Science
A 10 lb. frozen boneless roast needs to be thawed and baked to a temperature of 200 degrees F. The storage freezer maintains a temperature of -10 degrees F. Pork changes from solid to a thawed state at 30 degrees F and has the following properties: Heat Capacity "c" (frozen...
September 2, 2012 by Sejul

Chemistry
Prepare a 0.0200 mM dye solution at low pH by dilution 0.40 ml of the stock 0.100 mM chemical X into the appropriate volume of 2.5 M HCl. What is the amount of HCL required for dilution, the final concentration of HCl in the solution, and the pH? I know there's the MV = MV, ...
June 24, 2010 by Emma

chemistry
If you used 0.500 grams of Mg and an excess of HCL, how much hydrogen gas should be produced at STP
April 5, 2011 by Anonymous

You are to state what will increase and/or decrease in each of the transactions described below. 1) Mythical Services sold $500 of legal services on account. 2) Mythical collected the$500 from transaction nmuber 1 above 3) Mythical purchased office furniture on account in the...
June 15, 2006 by Laura

Chemistry
0.200 moles of NaF are added to 1L 2.0 molar HF. What is the pH? a) 2.14 b) 6.70 c) 10.80 d) 3.00 e) 7.00
April 29, 2012 by Zac

Chemistry/Calorimetry
You buy coffee (200.0 ml) served in a styrofoam cup. You are up late working in a chemistry lab, and want to drink the coffee right away, but at 95.0 degrees C, it is too hot to drink. You like the temperature of your coffee to be 79.0 ± 1.0 degrees C. You decide that the ...
February 23, 2012 by Jen

Chemistry
Determine how many grams of active antacid ingredient AL(OH)3 would be necessary to neutralize the HCL in 50.0 mL of .0100 M HCL (an approximation of the conc. of HCL in the stomach) 3HCL9aq)+AL(OH)3(s)-> AlCL3 (aq) = 3H2O (L)
June 7, 2011 by Vinny

Chemistry
What if when I find my product, I get the same compound as I did in my reactant? For example, FeCl3 + HCl ->FeCl3 + HCl. Then something is wrong. In this case, FeCl3 and HCl usually don't react. In very concentrated solutions of HCl, the FeCl4^- or FeCl6^-3 ion can form. In...
October 21, 2006 by Sally

Chemistry
Hi, I am trying to figure out how to calculate the average temperature of 2 different chemical solutions based upon the temperatures I measured. The question states: Find the average Ti of HCl & NaOH solutions. The Ti of NaOH solution is: 20.87 C The Ti of HCl solution is: 21....
March 12, 2012 by Jules

chemistry
Hi Cna someone please tell me what I must out into the Trial 1 column? It would be greatly appreciated. theLab: Determining the Ksp For Ca(OH)2 Purpose: The purpose of this experiment is to determine the Ksp for calcium hydroxide. Experimental Design: A saturated solution of ...
April 1, 2008 by Jessica

Chemistry
Mylanta is composed of aluminum hydroxide and calcium carbonate. assuming that a mylanta tablet contains 175 mg of aluminum hydroxide and 145 mg of cakcium carbonate, answer the following: how many mL of 0.00836 M HCL (aq) can be neutralized with 2 Mylanta tablets. I balanced ...
September 6, 2007 by Alex

Physics
There is a small amount of water at the bottom of a sealed container of volume 5.2 liters which is otherwise full of an ideal gas. A thin tube open to the atmosphere extends down into the water. The system is initially at atmospheric pressure and temperature 113 Celsius. If we...
April 6, 2010 by Plaster

chemistry
How many moles of NaOH must be added to 1.00L of this solution to increase the PH to 9.25?
July 18, 2012 by Heather

Chemistry
Dear Sir DrBob22 Thank you for your response we have an oil well. the well column has been completed (filled up) with completion fluid of gasoline. we want to stimulate the well by 28% HCL. if 28% HCL is to be injected into the the well column, whether a chemical reaction will...
April 28, 2014 by Ramtin

math
how many multiples of 11 are there between 200 and 500
November 13, 2012 by wan

MATH
HOW MANY MULTIPLES OF 11 ARE THERE BETWEEN 200 AND 500?
November 14, 2012 by wan

math
Mr. Jones grosses $500 per week. He has 6% automatically deposited into his savings account. At the end of the year 2% is added to the account. How much will he have in his savings account at the end of the first year after the interest is added? February 20, 2011 by joana chemistry please help solve this problem now. I really need an answer. thank you When one mole of KOH is neutralized by sulfuric acid, q=-56kJ. At 22.8 C , 25.0 mL of 0.500 M H2SO4 is neutralized by 50.0 mL of 0.500 M KOH in a coffee-cup calorimeter. What is the final temperature of the... March 3, 2012 by ogi chemistry I completely understand Le Chateliers principle but I have no idea about these questions. They're due tomorrow so fast help would be appreciated. Why did adding water to the equilibrium involving CoCl_4_^2-^ cause the color to change? Use Le Chateliers principle to explain the... December 1, 2010 by k chemisty what is the final pH after 1 drop(.05ml) of 6M HCl is added to 1.0L of freshly prepared pure water that was originally at a pH of 7.0. Is there a signigicant pH change? March 1, 2010 by tiffany Chemistry How much water must be added to 482. mL of 0.201 M HCl to produce a 0.147 M solution? (Assume that the volumes are additive.) December 2, 2012 by Lailah chemistry How much water must be added to 440. mL of 0.204 M HCl to produce a 0.139 M solution? (Assume that the volumes are additive.) April 4, 2013 by mary chemistry A sample of oxygen at room temperature occupies a volume of 500. L at 1.75 atm. What would be the volume of this gas at 2.50 atm at the same temperature? April 9, 2014 by Leeya chemistry AP You have to design a buffer based on one of the systems below System 1: HA1 and A1-1 K= 4 E-3 System 2: HA2 and A2-1 K= 5 E-4 System 3: HA3 and A3-1 K= 6 E-5 For the following parts assume that the buffer above in system2 has been constructed with [HA] =1M and that there is no... March 28, 2010 by maya chemistry The heat lost or gained by a system is related to its temperature change by a property called its heat capacity. The molar heat capacity of metals at or above room temperature equals 24.92 J/K.mol. The temperature of a block of lead (MM 207.2) was raised by 13.1 degrees when ... September 25, 2014 by korko Chemistry. Which of the following changes will increase the amount of solid solute able to be dissolved in a liter of liquid water? decreasing pressure increasing temperature decreasing temperature increasing surface area March 31, 2011 by Valentina Help me!, Physics A 60g piece of ice at an intial temperature that is unknown is placed into a glass of 250g of water sitting at room temperature when it is 80 degrees F in the room. The glass and ice come up thermal equilibrium at 4 degrees Celsius. What is the original temperature of the ... January 15, 2013 by Jazzy AP Chemistry What volume of each of the following bases will react completely with 21.00 mL of 0.500 M HCl? (a) 0.100 M NaOH (b) 0.0500 M Ba(OH)2 (c) 0.250 M KOH September 24, 2011 by Rahul Chemistry An ideal gas is allowed to expand from 6.00 L to 45.0 L at constant temperature. By what factor does the volume increase? ? Number The pressure will Increase by that factor or decrease by that factor? If the initial pressure was 105 atm, what is the final pressure? October 16, 2012 by Bill language 1.which factor is most helpful in helping technology to progress? a) unintended consequences b) a better understanding of the natural world c) risk-benefit analysis d)obsolete technologies 2. an oven is a technological system. which of the following describes into this system... September 24, 2013 by victoria chemistry how many kg of h20 must be added to 75.5g of Ca(NO3)2 to form a 0.500 m solution? November 18, 2009 by lynda smith physics helpt please? A copper wire or length 2.0M, with cross-sectional area 7.1x10^-6 m^2 and youngs modulus of 11x10^10 N/m^2 has a 200 kg load hung on it. what is its increase in length? F/A=Y* change in L/Length = (200*9.8)/7.1x10^-6=11x10^10* delta L/2m? am i even setting this equation up ... November 13, 2007 by natali chem At what temperature will a 1.0 g sample of neon gas exert a pressure of 500 torr in a 5.0 L container ? or At what temperature will a 0.0470 mol of a gas fill a balloon to 1.20 L under 0.988 atm pressure ? May 14, 2012 by katie chemistry calculate the change in pH when 9.00ml of 0.100M HCl(aq) is added to 100.0mL of a buffer solution that is 0.100M in NH3(aq) and 0.100M NH4Cl(aq). ...Calculate the change in pH when 9.00,L if 0.100M NaOH(aq) is added to the original buffer solution. October 28, 2012 by mike chemistry consider the following equilibrium: Mg(OH)2(aq) <-> Mg2+ (aq) + 2OH-(aq) a) what would happen to the equilibrium if some acid is added to the soultuion? --->OH- would increase causing Mg(OH02 to dissolve b) what would happen to the solubility of Mg(OH)2? ---> it ... October 29, 2012 by Ashlee college physics 2 steel train rails are placed end to end with space in between on a day where a temperature is 30 degrees. How much stress will be build if the temperature is increase to 150 degrees .assume that the original is 1.5m July 7, 2014 by joy Chemistry (a) A 102-g sample of water is placed in an insulated container and allowed to come to room temperature at 21°C. To heat the water sample to 41°C, how much heat must you add to it? kJ (b) Consider the hypothetical reaction, being run in an insulated container that contains 102... June 7, 2011 by Lance accounting 2 urgent please help part 1 June 30, 2008/2007 Assets Cash- 34,700/23,500 accounts receivable- 101,600/92,300 inventory- 146,300/142,100 Investment-0/50,000 Land-145,000/0 equipment- 215,000/175,500 accumulated depreciation- (53,400)/ (41,300) 2008= 594,000 /2007=442,100 Liabilities and ... November 19, 2008 by gabrielle physics When water falls from the top of the waterfall,at the victoria falls in zimbabwe,the temperature of the water at the top is less than the temperature at the bottom.If 180.5g of water falls a distance of 125.0m, calculate the increase in temperature of the water ,when it ... July 16, 2011 by Gift thermodynamics if 100ft^3 of atmospheric air at zero fahrenheit temperature are compressed to a volume of 1 ft^3 at a temperature of 200 degree fahrenheit, what will be the pressure of the air in psi? October 3, 2012 by 111111 Chemistry You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 C ) is 0 A, and the boiling point of ammonia (-33.35 C ) is 200 A What would be the temperature of absolute zero in A ? February 4, 2013 by Greg Math 5) Which is equivalent to the expression shown? 5^-3 a. -125 b. -15 **** c. 1/125 d. 2 6) Which is equivalent to the expression shown? 10^2 . 5^2 a. 2,500 ******* b. 250 c. 500 d. 200 7) The value of Square root 60 is between which pair of consecutive numbers? a. 59 and 60 b. ... February 10, 2014 by Dakota Chemistry Pharmacists sell tablets containing magnesium hydroxide, Mg(OH)2, to combat indigestion. A student carried out an investigation to find the percentage by mass of Mg(OH)2 in an indigestion tablet. The student reacted the tablet with dilute hydrochloric acid. Mg(OH)2(s) + 2HCl(... January 1, 2013 by Youtube 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 temperature E)... May 23, 2007 by Kristy Can someone Please Help You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 C ) is 0 A, and the boiling point of ammonia (-33.35 C ) is 200 A What would be the temperature of absolute zero in A ? February 4, 2013 by Greg science How many grams of hydrochloric acid are required to react completely with 4.30g of zinc? How many molecules of gas will be produced? 1. Write the balanced chemical equation. Zn + 2HCl ==> ZnCl2 + H2 2. Convert grams Zn to mols. mols = grams/atomic mass Zn. 3. Using the ... March 17, 2007 by Josh chemistry if 50 grams of a substance with temperature of 20 degrees C and a specific heat of 2 is mixed with 200 grams of water at 40 degrees C, what will be the equilibrium temperature of the mixture? February 24, 2011 by kassi Chemistry 1 A dilute solution of hydrochloric acid with a mass of 614.86 g and containing 0.33004 mol of HCl was exactly neutralized in a calorimeter by the sodium hydroxide in 619.41 g of a comparably dilute solution. The temperature increased from 15.529 to 19.691°C. The specific heat ... July 1, 2014 by Sarah chemistry There is a titration of 5.00 mL .010 M NaOH with .005 M HCl. Indicate the pH of the initial and final solutions and the pH at the stoichiometric point. What volume of HCl has been added at the stoichiometric point and the halfway point of the titration? I have no idea how to ... December 3, 2011 by Betty chemistry An old bottle of 12.3 M hydrochloric acid has only 33 mL left in it. What is the HCl concentration if enough water is added so that the final volume is 513 mL? November 29, 2010 by masin managerial finance A firm has sales of$1,200, net income of $200, net fixed assets of$500, and current assets of $300. The firm has$100 in inventory. What is the common-size statement value of inventory?
October 10, 2010 by vijay

chemistry
In the experiment you have added 50.0 mL of Ni(H2O)6 2+ to the calorimeter. To this you add 5.0 mL of ethlylenediamine and measure the change in temperature of the solution as the reaction proceeds. The temperature increases by 3.4 oC. Calculate the enthalpy (H) for ...
April 9, 2013 by Barb

Hard Calculus
A dose, D, of a drug causes a temperature change, T, in apatient. For C a positive constant, t is given by T=((C/2)-(D/3))D^3. (a) What is the rate of change of temperature change with respect to dose. (b) For what dose does the temperature change increase as the dose ...
November 9, 2008 by George

phys
A 10.9-g iron bullet with a speed of 4.00 102 m/s and a temperature of 20.0° C is stopped in a 0.400-kg block of wood, also at 20.0° C. (a) At first all of the bullet's kinetic energy goes into the internal energy of the bullet. Calculate the temperature increase of the bullet...
April 26, 2012 by opp

Chemistry
2 HCl (aq) + Ba (OH2) (aq) ----> BaCl2 + 2 H20 (l) deltaH = -118 kJ Calculate the heat when 100.0 mL of 0.500 M HCl is mixed with 300.0 mL of 0.100 M Ba(Oh2). Assuming that the temp. of both solutions was initially 25.0 degrees C and that the final mixture has a mass of 400...
October 1, 2007 by Jake

Chemistry
Chalk is a soft, white, porous sedimentary rock, a form of limestone composed of the mineral calcite. Calcite is calcium carbonate, CaCO3. It forms under relatively deep marine conditions from the gradual accumulation of minute calcite plates (coccoliths) shed from micro-...
May 19, 2011 by Shell

Chemistry
When hydrochloric acid (HCl) is added to water it dissociates to form H3O+ (aq) and Cl− (aq) as shown below. HCl (aq) + H2O (l) → H3O+ (aq) + Cl− (aq) What happened to the electrons in the H-Cl bond? Choose the best answer. The electrons are transferred to ...
September 25, 2012 by Lily

chemistry
What volume of 2.25\it M \rm HCl in liters is needed to react completely (with nothing left over) with 0.750L of 0.200\it M \rm Na_2CO_3?
April 7, 2013 by Lauren

Calculus
A dose, D, of a drug causes a temperature change, T, in apatient. For C a positive constant, t is given by T=((C/2)-(D/3))D^3. (a) What is the rate of change of temperature change with respect to dose. (b) For what dose does the temperature change increase as the dose ...
November 9, 2008 by George

Physical Science
If a hot iron ball is dropped into 200.0 gram of cooler waterthe water temperature increases by 2.0 celsius and the temperature of the ball decreases by 18.6 celsius. What is the mass?
February 22, 2012 by Anonymous

accounting
Olympic Sports Wear estimates its Annual Federal Income tax as $10,000. It has paid the tax in four installments of$2,500 each. However, at the end of the year, the actual tax amount is $11,200. Therefore, the company needs to pay$1,200 to the government. Instruction: ...
July 10, 2012 by working hard

science - chemistry pH problems
Here is the hint I received on how to solve those tough pH problems I posted earlier: Both of these can be solved using the H-H and doing the algebra. The math itself is hard to type out, but in Q1 the values of [NaA] and [HA] are 0.04805 and 0.15195. In Q2 you will have to ...
October 11, 2006 by ajones51

Chemistry
3.5 liters of H2O are added to 500 mL of a 2.0 M HNO3 solution. What is the resulting molarity?
March 25, 2010 by Riley

chemistry
A 10.0 g sample of liquid gallium metal, at its melting point, is added to 50.0g of water. The initital temperature of the water is 24.0 degrees C. If the molar enthalpy of freezing gallium is -5.54 kj/mol, what is the final temperature of the water? Thanks
November 7, 2010 by Bob

science
A mass,m of water at 100degree celcius is added to another mass of water ,m at a temperature,t. The reslting temperature of the mixture is T. If the specific heat capacity of water is 4.2J/gk. Drive an expression for L terms of other quantities.
April 22, 2012 by n s k

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