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July 26, 2014

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Chemistry (Insulated Vessel, temperature and vol.)
Insulated vessel has two compartments separated by a membrane. One side is 1 kg of steam at 400 C and 200 bar. The other side is evacuated. The membrane ruptures filling the entire volume. The final pressure is 100 bar. Determine the final temperature of the steam and the ...
October 2, 2012 by Simon

Chemistry
A 522g piece of copper tubing is heated to 89.5C and placed in an insulated vessel containing 159g of water at 22.8C. Assuming no loss of water and a heat capacity for the vessel of 10.0J/K, what is the final temperature of the system ( c of copper = 0.387 J/g*K)?
November 11, 2008 by Ray

chemistry
a 506g piece of copper tubing is heated to 89.5C and placed in an insulated vessel containing 159g of water at 22.8C. Assuming no loss of water and a heat capacity for the vessel of 10.0J/K, what is the final temperature of the system (c of copper = 0.387 J/g*K)?
November 15, 2008 by carl

College Chemistry
A 542-g piece of copper tubing is heated to 89.5 degrees Celcius and placed in an insulated vessel containing 159 g of water at 22.8 degrees Celcius. Assuming no loss of water and a heat capacity for the vessel of 10.0 J/K, what is the final temperature of the system (c=0.387 ...
February 21, 2010 by Courtney May

Chemistry
I am having a horrible time with Enthalpy change. I understand how to find specific heat I believe, but the heat capacity of the vessel is given as 10 J/K. My problem is that my professor did not show us how to work this type of problem, and I desperately need help with it. ...
July 2, 2010 by Casey

Chemistry
A 225 g sample of xenon is placed in a 15.6 L stainless steel vessel at 27.0C. a. What is the pressure in the vessel? b. If the temperature is raised to 200C, what is the pressure in the vessel? c. The air pressure outside the vessel is 1.00 atm. If the vessel is opened to ...
May 19, 2011 by Shell

chemistry
A 94.7 g sample of silver (s= 0.237 J/(g x Degree C)), initially at 348.25 Degrees C , is added to an insulated vessel containing 143.6 g of water (s=4.18 J/(g x Degree C)), initially at 13.97 Degrees C. At equilibrium, the finial temperature of the metal-water mixture is 22....
November 14, 2012 by marcus

chemistry
Which has more alcohol? 200 mL of 3.2 % vol/vol beer or wine with 7% vol/vol alcohol and a volume of 100 mL?
July 10, 2011 by g

chemistry
If 10g of steam at 110 c is pumped into an insulated vessel containing 100g of water at 20 c, what will be the equilibrium temperature of the mixture? spheat H2O(l)=4.18J/g*c, spheat h2O(g)=2.03J/g*c, heat of vap H2O(l)=2.260kJ/g
August 1, 2010 by Holly

Chemistry
H2 and F2 react according to the following equation, forming HF. H2(g) + F2(g)  2HF(g); H = 271 kJ If H2(g) and F2(g) were mixed in a thermally insulated vessel, the reaction that occurred would be a. endothermic, and the temperature of the reaction system ...
July 2, 2013 by Kayla

Physics
A vessel contains 10 kg of water and an unknown mass of ice at 0C. The temperature of the vessel is monitored for 60 minutes. During the first 50 minutes, the temperature remains at 0C. For the next 10 minutes, the temp steadily increases from 0C to 2C. a. Find the rate ...
December 8, 2011 by Megan

AP Chemistry
Three gases, xenon, helium, and hydrogen are confined in a 10.0 L vessel at a pressure of 7.0 atm. Intially the vessel contains 3.0 moles of xenon, 2.0 moles of helium, and 2.0 moles of hydrogen. What would the partial pressure of helium be if 5.0 moles of hydrogen are added ...
April 6, 2011 by Paxton

Chemistry
Sulfur trioxide gas, one of the causes of acid rain, is produced in the upper atmosphere when oxygen reacts with sulfur dioxide gas in the reaction shown below: 2SO2(g) + O2(g) <--> 2SO3(g) deltaH0 = -197kJ The gases are placed in a reaction vessel and allowed to come to...
April 6, 2012 by Abbagail

Chemistry
Solid copper oxide reacts with ammonia gas according to the following equation: 3CuO + 2NH3 -> 3Cu + N2 + 3H20 50 grams of CuO is placed in an 80L reaction vessel, and the vessel was evacuated. Ammonia gas was then gradually introduced into the vessel, slow enough for the ...
September 30, 2013 by Nikki

Chemistry
A sample of steam with a mass of 0.552 g and at a temperature of 100 C condenses into an insulated container holding 4.45 g of water at 7.0 C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?
January 19, 2010 by eddie

chemistry
A sample of steam with a mass of 0.552 and at a temperature of 100 condenses into an insulated container holding 4.35 of water at 6.0. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?
January 29, 2012 by amy

chemistry
The vapor pressure of water at 80 degrees c is 355mmHg. A 100cm3 vessel contained wateraturated oxygen at 80 degrees c., the total gas pressure being 760 mmHg. The contents of the vessel were transferred by pumping to a 50cm3 vessel at the same temperature. What were the ...
October 26, 2011 by el

physics
in a vessel of 40 cm3 of water at 4 C is introduced aluminum over 80g to 8 C. neglecting the effect of the vessel, calculate final temperature
November 24, 2010 by karla

chem
The decomposition of ammonium hydrogen sulfide that is shown below is an endothermic process. NH4HS(s) reverse reaction arrow NH3(g) + H2S(g) A 6.1589 g sample of the solid is placed in an evacuated 4.000 L vessel at exactly 24C. After equilibrium has been established, the ...
February 10, 2010 by Anonymous

Chemistry
Suppose a piece of lead with a mass of 14.9 g at a temperature of 92.5 C is dropped into an insulated container of water. The mass of water is 165 g and its temperature before adding the lead is 20.0 C. What is the final temperature? I know that I have to multiply (mass in ...
August 23, 2007 by Anonymous

Chemistry
Two vessels are labeled A and B. Vessel A contains NH3 gas at 70C, and vessel B contains Ne gas at the same temperature. If the average kinetic energy of NH3 is 7.1 10-21 J/molecule, calculate the mean-square speed of Ne atoms in m2/s2.
October 13, 2008 by Niki

Chemistry
What is the volume of Tin(Sn)? Mass of sample = 2.588g Initial vol. of water = 31 m/L Final vol. of water = 32 m/L
February 10, 2011 by Sierra

Chemistry
A sample of steam with a mass of .550 g and at a temperature of 1 degrees C condenses into an insulated container holding 4.40 g of water at 5.0 degrees C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?
January 24, 2012 by Becca

Chemistry
A sample of steam with a mass of 0.550 g and at a temperature of 100 degrees C condenses into an insulated container holding 4.40 g of water at 5.0 degrees C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?
January 25, 2012 by Becca

physics
a 3.55 kg sample of an alloy is heated to 295 degree and plunged into an aluminium vessel containing 10.0L of water. the initial temperature of the vessel and water is 19 degree.the mass of the aluminium vessel is 2.1 kg and the specific heat of aluminium is 900 J kg-1K-1. if ...
April 26, 2007 by Twinkle

Chemistry
A vessel containing 39.5 cm^3 of helium gas at 25C and 106kPa was inverted and placed in cold ethanol. As the gas contracted, ethanol was forced into the vessel to maintain the same pressure of helium. If this required 7.7cm^3 of ethanol, what was the final temperature of the...
October 25, 2011 by Anonymous

Physics Help!
Gas is contained in an 8.45 liter vessel at a temperature of 19.8oC and a pressure of 8.70 atm. Determine the number of moles of gas in the vessel. Do not enter units.
November 6, 2012 by Emily

Chemistry
Determination of Ksp, ΔG, ΔH and ΔS for Ca(OH)2. *** Need help on problem #3 & #4 *** CALCULATIONS: 1. Calculate the average solubility of calcium hydroxide, Ca(OH)2, at each temperature. 2. Calculate the Ksp for Ca(OH)2 at each temperature. 3. Calculate the...
March 18, 2014 by Airin

chemistry
in a vessel, 0.6 mol Ba(NO3)2 and .3 mol H3PO4 are combined w deionized water to a final vol of 2 L. 3Ba(NO3)2 + 2H3PO4 --> Ba3(PO4)2 + 6HNO3 1. Calclate mass of Ba(PO4)2 formed 2. calcualate pH of HN03 3. What the concentation in mol/L of the nitrate ion after the rxn ...
March 10, 2010 by im stressed!

chemistry
Suppose a piece of lead with a mass of 14.9g at a temperature of 92.5c is dropped into an insulated container of water. The mass of water is 165g and its temperature before adding the lead is 20.0c. What is the final temperature of the system? The sum of the heats gained is ...
March 15, 2007 by Jon

chemistry
What is the pressure in a 1.5 L vessel containing 0.25 moles of O2 if the temperature is 37oC?
May 2, 2009 by Anonymous

kinetic theory
Air is filled at 60deg C in a vessel of open mouth. Upto what temperature should the vessel be heated so that one-fourth of the air may escape? Ans 171degC
April 29, 2012 by ridhi

French
Could you please check these thanks. Directions: Write another word or expression for each phrase below. 1. un vol qui arrive de Paris. Answer: Un vol en provenance de Paris. 2. un vol qui va Paris. Answer: Un vol desination de Paris. 3. Un vol qui commence et finit dans ...
August 27, 2009 by Missy

Chemistry
1)Suppose a piece of lead with a mass of 14.9 g at a temperature of 92.5 degrees is dropped into an insulated container of water. The mass of water is 165 g and its temperature before adding the lead is 20.0 degrees. What is the final temperature of the system? 2)What are the ...
January 7, 2008 by Mike

chemistry
HCl is titrated with NaOH. When doing the titration, some of the NaOH splashed onto the inside surface of the Erlenmyer flask, and you forgot to rinse it into your sample. Would the systematic error be falsely high, low, or unaffected and why? Thanks. As I understand the ...
September 17, 2006 by bria

physics => really need help on 2 problems (#1)
A house has well insulated walls. It contains a vol of 100m^3 of air at 300K a) calculate the E required to increase the T of the diatomic gas by 1.00C b) If this E could be used to lift an object of mass m through a height of 2.00m what is the mass of m?
March 26, 2008 by ~christina~

Chemistry
A vessel containing 39.5 cm3 of helium gas at 25C and 106 kPa was inverted and placed in cold ethanol. As the gas contracted, ethanol was forced into the vessel to maintain the same pressure of helium. If this required 17.8 cm3 of ethanol, what was the final temperature of ...
January 20, 2013 by jacfar

Chemistry
A vessel containing 39.5 cm3 of helium gas at 25C and 106 kPa was inverted and placed in cold ethanol. As the gas contracted, ethanol was forced into the vessel to maintain the same pressure of helium. If this required 17.8 cm3 of ethanol, what was the final temperature of ...
January 24, 2013 by flame

Chemistry
A vessel containing 39.5 cm3 of helium gas at 25C and 106 kPa was inverted and placed in cold ethanol. As the gas contracted, ethanol was forced into the vessel to maintain the same pressure of helium. If this required 18.8 cm3 of ethanol, what was the final temperature of ...
September 22, 2013 by Hannah

Chemistry
1. When 20cm^3 of a gaseous Allene burns in an excess of oxygen, 60cm^3 of carbon dioxide are formed. Both volumes are measures at r.t.p. What is the formula of alkene? Is it C3H6 or C6H12 and why? 2. A student investigate the reaction of vegetable oil with hydrogen. 100cm^3 ...
November 13, 2011 by StuartKess

chemistry
A 210 g iron bar is heated and then placed in 100. g of water in an insulated container. The water temperature increases from 21.2 C to 53.3 C. What was the initial temperature of the iron bar? (Specific heats: cFe = 0.449 J/gK; cwater = 4.184 J/gK)
December 1, 2011 by Faisal

Chemistry
Can someone check my answer for me... 1)Suppose a piece of lead with a mass of 14.9 g at a temperature of 92.5 degrees is dropped into an insulated container of water. The mass of water is 165 g and its temperature before adding the lead is 20.0 degrees. What is the final ...
January 8, 2008 by Mike

physics
A piece of metal with a mass of 1.9 kg, specific heat of 200 J/kg ◦ C, and initial temperature of 100 ◦ C is dropped into an insulated jar that contains liquid with a mass of 3.9 kg, specific heat of 1000 J/kg ◦ C, and initial temperature of 0 &#...
January 17, 2012 by Josh

Chemistry
The density of any material can be determined by the slope of a straight line by plotting mass values and vol. values M=DV Mass g. Vol.ml #1 0.55 0.60 #2 1.75 1.80 #3 3.50 3.40 #4 5.60 5.25 #5 7.50 7.00 I need to find the slope and graph the info. So do I make the graph with Y...
October 11, 2011 by Connie

CHEMISTRY
Calculate the change in entropy that occurs when 17.68 g of ice at -12.7C is placed in 54.05 g of water at 100.0C in a perfectly insulated vessel. Assume that the molar heat capacities for H2O(s) and H2O(l) are 37.5 J K-1 mol-1 and 75.3 J K-1 mol-1, respectively, and the ...
October 23, 2012 by Sarah

Chemistry
The capacity of a large irregularly shaped vessel cannot be computed from geometric data. As a result, it is decided that the volume be established from analytical data. The vessel is filled to its capacity mark with calcium-free water. A known small amount of a concentrated ...
April 28, 2008 by Gabby

Chemistry
A 1.00 L vessel contains 5 g N2 and 1.5 g H2O at 25 degrees C. Calculate the mass of LIQUID water that would be present in the vessel.
July 4, 2012 by Kellie

Chemistry
FeS2 (s) + O2(g) -----> SO2(g) +Fe203(s) (unbalanced) a production error leads to the sulfide being placed in a 950-L vessel with insufficient oxygen. Initially, the partial pressure of O2 is 0.64 atm, and the total pressure is 1.05 atm, with the balance due to N2. The ...
October 13, 2011 by tori

ap chemistry help!!!!
Ive been absent from class because of the flu so i don't have a clue how to figure these out! Help! due tomorrow at 12! 1).Suppose that 135 g of ethanol at 23◦C is mixed with 255 g of ethanol at 75◦C at constant atmospheric pressure in a thermally insulated vessel...
October 24, 2012 by harry

Final Temperature
A sample of steam with a mass of 0.553 g and at a temperature of 100 degrees C condenses into an insulated container holding 4.25 g of water at 4.0 degrees C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?
January 15, 2013 by Amy

chemistry
Suppose you mix 20.1 g of water at 66.2C with 44.6 g of water at 35.7C in an insulated cup. What is the maximum temperature of the solution after mixing?
October 29, 2010 by caroline

Chemistry
Suppose you mix 20.1 g of water at 66.2C with 45.1 g of water at 35.7C in an insulated cup. What is the maximum temperature of the solution after mixing?
June 7, 2011 by Lance

Chemistry
An insulated container has 54 grams of 90 C water. How much ice is required to lower the temperature of 50C? No ice remains.
March 13, 2013 by Sarcasticqueen

Chemistry
An element, M, reacts with oxygen to give an oxide of formula M3O4. A sample of M of 257 mg is placed in a 500.0 mL vessel containing oxygen at 0.991 atm and 23.0C. After cooling the vessel back to the original temperature, the pressure was 0.813 atm. Calculate the molar mass...
February 2, 2008 by Student

Science- Chemistry Ap
2SO3(g) -> 2SO2(g) + O2(g) Delta H = 197kj For this reaction shown above, describe the changes that will occur to the number of moles of SO3 under the following conditions: (a) Additional oxygen is added to the reaction vessel. (b) The pressure in the reaction vessel is ...
April 28, 2010 by Jake

AP Chemistry
What would be the final temperature of the system if 20 g of lead at 100◦C are dropped into 20 g of water at 30 ◦C in an insulated container?
September 30, 2013 by Anonymous

chemistry
What is the pressure in a 1.5 L vessel containing 0.25 moles of )2 if the temperature is 37 degrees C? R the universal gas constatn is 0.082 L atm/mole K
May 6, 2012 by Ambra

chemistry 1st year
A 5 liter vessel contains 2g of hydrogen and 28g of nitrogen at 27 temperature.find to total mixture ?
July 1, 2013 by mirza

Physics
A 3.9010^2kg cube of ice at an initial temperature of -18.0degreesC is placed in 0.480kg of water at 41.0degreesC in an insulated container of negligible mass. Calculate the change in entropy of the system. I found the equilibrium temperature to be at 304.9K, then used change...
December 7, 2010 by Melissa

chemistry
Raoul Pictet, the Swiss physicist who first liquefied oxygen, attempted to liquefy hydrogen. He heated potassium formate, KCHO2, with KOH in a closed 2.50 L vessel. KCHO2(s) + KOH(s) → K2CO3(s) + H2(g) If 50.1 g of potassium formate reacts in a 2.50-L vessel, which was ...
October 24, 2010 by caroline

science
350g ofwater at 30 degree celcius is contained in a copper vessel of mass 50g. Calculate the mass of ice required to bring down the temperature of the vessel and its content at 5 degree celcius.
March 16, 2014 by manoj

9
In an closed vessel 300 torr of argon gas is filled and the vessel heated to 925 degree celcius from room temperature. What will be the pressure at 925 degree celcius .
May 11, 2010 by radhakrishnan

chemistry
An insulated beaker with negligible mass contains liquid water with a mass of 0.255{kg} and a temperature of 76.0{C} How much ice at a temperature of -19.9 C must be dropped into the water so that the final temperature of the system will be 32.2? Take the specific heat of ...
December 7, 2009 by dan

chemistry-thermochemistry
A student mixes 85.7 g of water at 68.0C with 50.7 g of water at 24.5C in an insulated flask. What is the final temperature of the combined water
October 5, 2008 by james

Math
A bookworm finds itself on page 1 of volume 1 and begins eating straight through to the last page of volume 5.If each book is 6 centimeters thick,including the front and back covers,which are half a centimeter each what is the distance the bookworm travels? I think the problem...
December 18, 2006 by Chasity

Chemistry
A student mixes 85.1 g of water at 69.6°C with 58.1 g of water at 22.0°C in an insulated flask. What is the final temperature of the combined water?
February 9, 2013 by John

chemistry
A sample of a saturated hydrocarbon is placed in a 1.0L vessel at 107oC. The pressure of the sample at these conditions is .40 atm. A stoichiometrically equivalent amount of oxygen is added to the vessel and the mixture is combusted. Following combustion, the pressure in the ...
May 22, 2012 by bill

Chemistry
In a high temperature corrosion cell we have 5 vol% O2 and 500 vppm HCl. We know at high temperature the reaction is Deacon Process (600C) 4HCl(g)+O2(g)=2Cl2(g)+2H2O(g). We have thermodynamic phase diagram of a system (e.g., Fe-O2-Cl2) at 600 (log pO2 - x axis and log pCl2 in ...
February 6, 2014 by T Hussain

Chemistry
(a) A 102-g sample of water is placed in an insulated container and allowed to come to room temperature at 21C. To heat the water sample to 41C, 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

chemistry
2nd revision to the question, it is 7.62atm not 7.2atm, its now all correct on the question. sorry again Fluorine and krypton react to form binary compounds when a mixture of the two gases is heated to 500C in a nickel reaction vessel. A 100mL nickel container is filled with ...
May 10, 2011 by alex

chemistry
Transfer the tablet to a clean 125-mL Erlenmeyer flask. Add 10-mL of 1M NaOH and heat the mixture to a gentle boil. Once the solution has cooled to room temperature, transfer it to a 100-mL vol. flask. Using the diluted solution from the 100-mL volumetric flask, rinse a 1-mL ...
January 31, 2010 by eng

chemistry
when 0.100mole H2S was put into a 10.0-L vessel and heated to 1132C, it gave an equilibrium maixture containing 0.0285 mol H2. @hat are the valuesw of Kc and Kp at this temperature?
February 14, 2012 by tammie

chemistry
when 100mL of 1.00 mol/L sodium hydroxide is added to 100mL of 1.00mol/L hydrochloric acid in an insulated container, the temperature rises from 21.0 degress to 34.6 degrees. Calculate the heat of neutralisation for the reaction.
August 14, 2011 by Anonymous

Chemistry
A 455-g chunk of iron is removed from an oven and plunged into 385g water in an insulated container. The temperature of the water increases from 27 degrees celsius to 89 degrees celsius. If the specific heat of iron is 0.449 J g^-1 degrees Celsius^-1, what must have been the ...
November 4, 2010 by Angel

Chemistry
Four ice cubes at exactly 0 Celsius having a total mass of 55.0g are combined with 120g of water at 77 Celsius in an insulated container. If no heat is lost to the surroundings, what will be the final temperature of the mixture?
September 10, 2012 by Ben

french
______ l'equipe ja ponaise a tres bien joue a. Tout b. Toute c. Tous d. Toutes I think it is A? On annonce le de'part de _____ vol? Le vol a destination de Paris? a. quel b. quelle c. quels d. quelles is it A?
May 5, 2009 by sophie

Chemistry
Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of 659.452 g after it has been filled with nitrogen gas at a pressure of 790. torr and a temperature of 15C. ...
May 31, 2008 by Alex

Chemistry
A 156.5 g piece of stainless steel was heated to 510 C and quickly added to 25.11 g of ice at -30 C in a well-insulated flask that was immediately sealed. What will be the final temperature of the system if there is no loss of energy to the surroundings? Does anyone know how I...
October 26, 2008 by Jerry

thermodynamic
A rigid vessel of 1m^3 contains steam at 20 bar and 400 degree C. the vessel is cooled until the steam is just dry saturated. Calculate the mass of steam in the vessel.
July 17, 2011 by Amber

Chemistry I
25.0 mL of ethanol (density = 0.789 g/mL) initially at 4.2C is mixed with 35.7 mL of water (density = 1.0 g/mL) initially at 25.3C in an insulated beaker. Assuming that no heat is lost, what is the final temperature of the mixture?
September 15, 2010 by Robbie

chemistry
If 51.6 mL of ethanol (density = 0.789 g/mL) initially at 6.4C is mixed with 48.9 mL of water (density = 1.0 g/mL) initially at 29.1C in an insulated beaker, and assuming that no heat is lost, what is the final temperature of the mixture?
October 15, 2013 by MK

Chemistry
Four ice cubes at exactly 0 ^\circ {\rm{C}} having a total mass of 55.0g are combined with 110g of water at 77^\circ C in an insulated container. Part A If no heat is lost to the surroundings, what will be the final temperature of the mixture?
January 22, 2013 by Brittany

chemistry
at a particular temperature, k equals 2.0 x 10 to the -6 power for the reaction 2CO2 <-> 2CO + O2 if 2.0 mol CO2 is initially placed into a 5.0 L vessel, calculate the equilibrium concentration of all species
December 3, 2012 by Anonymous

physics
liquid pressure is independent on the? a. shape of the containing vessel b. area of the bottom of the containing vessel c. both a and b and d d. height of the containing vessel
February 29, 2012 by ricajane

physics
if a piston is insulated and being pushed, is the temperature increased
May 25, 2010 by bme1

chem
A vessel containing 39.5 cm^3 of helium gas at 25 degrees celsius and 106 kPa was inverted and placed in cold ethanol. As the gas contracted, ethanol was forced into the vessel to maintain the same pressure of helium. If tihs required 7.7 cm^3 of ethanol, what was the final ...
November 9, 2008 by Anna

Physics(12th grade)
When the temperature of a gas in a vessel is increased by 1C then the pressure is increased by 0.5%. what will be its initial temperature?
April 9, 2012 by Tulika

chemistry
A 32.2 g iron rod, initially at 22.3 C, is submerged into an unknown mass of water at 63.9 C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 58.6 C. What is the mass of the water?
March 19, 2012 by HELP

Chemistry
A 35.0-g iron rod, initially at 25.6C, is submerged into an unknown mass of water at 67.7C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 63.5C. What is the mass of the water?
November 17, 2012 by Matt

Chemistry
Will someone show me the formula or help me through working this question? Thanks! A 2.85g lead weight, initially at 10.3 deg C, is submerged in 7.55g of water at 52.3 deg C in an insulated container. what is the final temperature of both substances at thermal equilibrium?
April 10, 2014 by Cathy

chemistry
an ideal gas at 75.0 c and 760 .mm hg is contained in a flexible vessel. Its volume is doubled and the pressure remains.unchanged .determine the temperature of the gas as a consequence of these changes
August 26, 2011 by devin boutte

Chemistry
A vessel containing air (79% N2 and 21% O2) at 5bar and 280K is placed in a vacuum and a tiny hole is punched through the lid of the vessel. If the rate of effusion of O2 is 1.25x10^-7mol/s, at what rate is the nitrogen effusing? (in mol/s)
October 4, 2012 by Nancy

What is the Final Temperature?
Four ice cubes at exactly 0 degrees C having a total mass of 53.0 g are combined with 120 g of water at 77 degrees C in an insulated container. If no heat is lost to the surroundings, what will be the final temperature of the mixture?
January 6, 2013 by Amy

AP Chemistry
I need alot of help on this problem, it is due WEDNESDAY and I have no clue how to do it Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of 659.452 g after it ...
January 21, 2008 by Eric

Chemistry
A student mixes 95.1g of water at 77.5 degree C with 42.7g of water at 141.1 degree C in an insulated flask. What is the final temperature of the combined water?
October 31, 2010 by Linetta De La Cruz

Chemistry
Suppose it is a hot summer day (40.0 degrees C = 104.0 degrees F), and you have left a can of hairspray outside so the gas within it is now at the same temperature of its surroundings. As part of your chemistry lab class, you have to build a safe and effective potato gun to ...
March 16, 2013 by Anonymous

Chemistry
Suppose it is a hot summer day (40.0 degrees C = 104.0 degrees F), and you have left a can of hairspray outside so the gas within it is now at the same temperature of its surroundings. As part of your chemistry lab class, you have to build a safe and effective potato gun to ...
March 16, 2013 by Tonya

Chemistry
If 82.4 g of cold water (initially at 22 C) is mixed in an insulated container with 96 g of hot water (initially at 88 C), what will be the final temperature of the water in C?
April 30, 2014 by Rachel

Chemistry.
Ca(HCO3)2(s) decomposes at elevated temperatures according to the stoichiometric equation Ca(HCO3)2(s)-> CaCO3(s) + H2O(g) + CO2(g) a.) If pure Ca(HCO3)2(s) is put into a sealed vessel, the air is pumped out, and the vessel and its contents are heated, the total pressure is...
November 22, 2010 by Jill

Biology
I'm so horrible at biology so help is appreicated; "The following experiment is to test the limits of cell population growth. Cells were grown in six flasks under different conditions. Eash flask contained a nutrient broth of the same concentration. The table below shows the ...
January 15, 2008 by Lindsay

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