Saturday
April 19, 2014

Search: when 35.0ml of 1.43 M NaOH at 22.0 degree celcius is neutralized by 35.0 ml of HCl also at 22.0 degree celcius in a coffee-cup calorimeter, the temperature of the final solution rises to 32.29 degree celcius

Number of results: 33,764

science
How much heat is required to warm 225g of ice from -46.8 degree celcius to 0.0 degree celcius, melt the ice, warm the water from 0.0 degree celcius to 100.0 degree celcius, boil water, and heat the steam to 173.0 degree celcius.
Thursday, March 31, 2011 at 11:21pm by kayt

Chemistry
Substance A has a melting point of -10 degree celcius and a boiling point of 57 degree celcius. Sunstance B has a melting point of -67 degree celius and a boiling point of 15 degree celius. Room temperature is 20 degree celcius. (A) What is the physical state of substance A at...
Monday, October 18, 2010 at 11:46am by Claudia

chemistry
the vapour pressure of water at 20 degree celcius is 18 mm hg .if the relative humidity is 35 % the weight per litre of air at 20 degree celcius is ?
Friday, September 14, 2012 at 2:58am by anni

physics
What mass of steam initially at 125 degree celcius is needed to warm 250g of water in 100g beaker from 22 degrees celcius to 50 degrees celcius?
Thursday, January 20, 2011 at 4:54pm by Nomsa

Chem (please read soon)
50.0mL of 0.1 molar NaOH is added with 50.0mL of 0.1 molar CH3COOH. The Ka = 1.8*10^-5. what is the pH of the solution? a) 7.00 b) 9.22 c) 4.77 d) 8.22 e) 5.78 I think that the answer is d. Would i be safe in saying that?
Sunday, April 29, 2012 at 11:27pm by Zac

science
in shell and tube type of condenser, the flue gas mixture of acetaldehyde,oxygen and nitrogen at 17391.17Kg/hr enters to the condenser at 75 degree celcius and leaves at 20 degree celcius,while the cooling water enters at 17 degree celcius and leaves at 37 degree celcius....
Friday, May 18, 2012 at 2:38pm by hagos

math
The temperatures in degree celcius at midnight on 10 consecutive days were 4,1,3,0,-2,-1,-5,-3,1,-2. How many of these temperatures are within 2.2 degree celcius of 1 degree celcius?
Friday, August 17, 2012 at 12:44pm by krish

Heat Energy
1. (a) 500g of copper is heated from 30 degree celcius - 120 degree celcius?. (b) if the same quantity of heat is supplied to 300g of water initial at 30 degree celcius,what will be the final temperature.
Tuesday, March 19, 2013 at 2:43pm by Precious

college physics
calculate the specific heat of 200g of substance whose temperature is 30 degree celcius if it is mixed with 200g of water heated in a 300g iron container at 100 degree celcius. the final temperature of the mixture is 98 degree celcius.
Tuesday, February 14, 2012 at 9:06pm by albert

college physics
calculate the specific heat of 200g of substance whose temperature is 30 degree celcius if it is mixed with 200g of water heated in a 300g iron container at 100 degree celcius. the final temperature of the mixture is 98 degree celcius.
Tuesday, February 14, 2012 at 9:06pm by albert

Physics
120 grams of metal at 88 degree celcius is poured into a 70 grams isolated cup contains 250 grams of water at 16 degree celcius. The final temperature of the mixture is 17.5 degree celcius. Determine the specific heat capacity of the metal?
Thursday, July 11, 2013 at 8:18am by vench

chemistry
Which of the following when added to 100.0mL of a 0.100M soln of NH4Cl would produce a buffer soln? a.100.0mL of 0.100 M HCl soln b. 100.0mL of 0.050M NaOH soln c. 100.0mL of 0.100M NaOH soln d. 100.0mL of 0.050M NH4No3 soln e.none of the above
Tuesday, July 27, 2010 at 4:45pm by Jin

chemistry
determine the solubility in g/100 g water of A. KNO3 at 90DEGREE CELCIUS B. KBr at 80 degrees celcius C. Kl at 0degree celcius D. KCl at 40 DEGREE CELCIUS
Sunday, February 16, 2014 at 10:27am by jhelo

Chemistry
When 35.0 mL of 1.43 M NaOH at 22.0 degres Celsius is neutralized by 35.0 mL of HCL also at 22.0 degrees Celsius in a coffee-cup calorimeter, the temperature of the final solution rises to 31.29 degrees Celsius. Assume that the specific heat of all solutions i 4.18 J/ g* C, ...
Friday, March 19, 2010 at 9:32pm by Google

chemistry
calculate the pH of the solution when 25.0ml of 0.0920M HCL is titrated with 0.15ml, 23.0ml, 30.0ml of 0.10M NaOH
Wednesday, January 23, 2013 at 12:08pm by nathalie

Heat energy
CORRECTION (a). 500g of copper is heated from 30 degree celcius to 120 degree celcius, what is the quantity of heat supplied?(b). If the same quantity of heat is supplied to 300g of water initial at 30 degree celcius. What will be the final temperature.
Tuesday, March 19, 2013 at 4:02pm by Precious

Calculus
The equation for converting Farenheit to Celcius is F=9/5C + 32. What is the meaning of the slope of this line? A. For every 9 degree increase in Celcius, there's a 5 degree increase in Farenheit. B. For every 5 degree increase in C, there's a 9 degree increase in F. C. For ...
Monday, February 2, 2009 at 2:49pm by twa

Science
What is the approximate value of the solution after 1.75 if it is 19 degree celcius at 1.5 and 24 degree celcius at 2.0 minute?
Sunday, September 7, 2008 at 3:05pm by Alisha

Science
What is the approximate temperature of the solution after 1.75 if it is 19 degree celcius at 1.5 and 24 degree celcius at 2.0 minute? Can anyone say how to do it exactly?
Sunday, September 7, 2008 at 3:44pm by Alisha

chemistry
volume of HCl is 10.0ml. initail volume of NaOH is 1.0ml and final is 21.0ml. this is for the first trial only.
Saturday, December 22, 2012 at 3:10pm by Riana

Chemistry 109
How many joules of heat are required to raise the temperature of 225 g of water from 42 degree celcius to 75 degree celcius?
Monday, July 22, 2013 at 12:45am by Chrystal Kilgore

physics
0 degree celcius because all the ice has not melted or 4 degree celcius.
Wednesday, April 11, 2012 at 2:05am by tanmay bhoite

Chemistry
If i titrated 25.0mL of 0.500M HCl with 0.500M NaOH and then 25.0mL of 0.500M of an unknown weak acid HA with 0.500M NaOH. How would the two titration curves compare at 10 or 15mL of NaOH Beyond equivelance pts? I think that they will be the ssame or similar but i don't know ...
Thursday, March 3, 2011 at 11:10pm by Jake

chemistry
what mass of steam intially at 130 degree celcius is needed to warm 200 grams of water in a 100 gram container from 20 to 50 degree celcius
Thursday, January 20, 2011 at 9:04pm by mike

Chemistry
How much heat is required to vaporize 1.00 L of CCl4 at its normal boiling point? The following data are given for CCl4. Normal melting point, -23 degree celcius , normal boiling point, 77 degree celcius density of liquid 1.59 g/mL; ; enthalpy of fusion 3.28 kJ/mol vapor ...
Monday, December 8, 2008 at 7:50pm by Ashleigh

physics
A metal wire has a resistance of 8 ohm at a temperature of 20 degree celcius . If the same wire has a resistance of 8.40 ohm at 70 degree celcius , what is the resistance of this wire in ohms when its temperature is -10 degree celcius ?
Thursday, November 14, 2013 at 10:15pm by rosa

physics
A metal wire has a resistance of 8 ohm at a temperature of 20 degree celcius . If the same wire has a resistance of 8.40 ohm at 70 degree celcius , what is the resistance of this wire in ohms when its temperature is -10 degree celcius ?
Thursday, November 14, 2013 at 10:16pm by rosa

Chemistry
A 100.0 ml sample of 0.300 M NaOH is mixed with a 100.0 ml sample of 0.300 M HNO3 in a coffee cup calorimeter. Both solutions were initially at 35.0 degrees celcius; the temperature of the resulting solution was recorded at 37.0 degrees celcius. Determine the delta H (in units...
Wednesday, November 10, 2010 at 7:34pm by Kristy

physics
a cylinder of diameter 1cm at 30degree celcius is to slid into a hole on a steel plate. the hole has a diameter of 0.9997 cm at 30 degree celcius. to what temperature must be the plate be heated when steel has the alpha 1.1X10^-5/degree celcius
Friday, September 2, 2011 at 1:17am by Tanya

college chemistry
How much heat is needed to melt 50.0g of ice at 0 degree celcius and then heat the water to 25 degree celcius?
Sunday, November 2, 2008 at 9:43pm by christine

Chemistry Intro
If the solubility of alum is 1g @ 1 degree celcius and 1.7 g at 6 degree celcius how much alum (KAl(SO4)2.12H20) would you expect to dissolve at 5.5% C?
Tuesday, December 7, 2010 at 11:01pm by Kat

chemistry
a 25.0ml dsmplr og 0.105M HCI was titrated with 31.5ml of NaOH. What is the concentration of the NaOH I got 0.0834M am I correct HCI + NaOH -----> H20 + NaCl 25.0ml HCI x 1L/1000mlx0.105 mol HCI/1L HCI X 1 mol NaOH/ I mol HCI = 0.0834M
Thursday, November 10, 2011 at 8:35pm by Monique

chemistry
125 mL of 25 dergree celsius of distilled water was used to wash and transfer a precipitate. rather than 20 ml of CHILLED distilled water (at 4 degree celcius). the solubility of baruim iodate monohydrate in 25 degree celcius water is 0.028g per 100 ml of water; in 4 degree ...
Monday, March 1, 2010 at 10:03pm by Myaa

ap chemistry
a cubic piece of uranium metal (specific eat capacity= .117 J/g degree celcius) at 200.0 degrees celcius is droped into 1.00 L of deuterium oxide ("heavy water", specific heat capacity=4.211 J/g degree celcius) at 25.5 degrees celcius. the final temperature of the uranium and ...
Friday, September 24, 2010 at 7:06pm by Sarah

chemistry
A 100.0 ml sample of 0.300 M NaOH is mixed with a 100.0 ml sample of 0.300 M HNO3 in a coffee cup calorimeter. Both solutions were initially at 35.0 degrees celcius; the temperature of the resulting solution was recorded at 37.0 degrees celcius. Determine the delta H (in units...
Wednesday, November 10, 2010 at 5:10pm by Kristy

Chemistry
500.0mL of 0.220 mol/L HCl(aq) was added to a high quality insulated calorimeter containing 500.0mL of 0.200mol/L NaOH(aq).Both solutions had a density of 1.000g/mL & a specific heat of 4.184 J/g.K. The calorimeter had a heat capacity of 850.0 J/degree C. The temperature of ...
Friday, March 23, 2012 at 8:33am by Meenaakshi

science...help
thanks but i m sorry i forgot and didnt type the whole question....the question is: As the temperature of soil decreases from 10 degree celcius to -5 degree celcius, what will most likely happen to the infiltration rate of water through it?
Thursday, February 12, 2009 at 9:31pm by Anonymous

chemistry
A samples with a mass of 35 grams and a temperature of 97.3 degree c is placed into 75.0 g of water at 19.7 degree c. The final temperature is 22.3 degree c, what is the specific heat of the sample?
Tuesday, January 25, 2011 at 9:10pm by Linda

Chemistry
In one trial of an investigation 50.0 mL of HCl(aq) of an unknown concentration is Tiresias with 0.10M NaOH (aq). During the titration the total volume of NaOH (aq) added and corresponding pH value of the reaction mixture are measured and recorded in the table below: 10mL-1....
Thursday, April 14, 2011 at 5:47pm by Kelly

chemistry
A 100.0 ml sample of 0.300 M NaOH is mixed with a 100.0 ml sample of 0.300 M HNO3 in a coffee cup calorimeter. Both solutions were initially at 35.0 degrees celcius; the temperature of the resulting solution was recorded at 37.0 degrees celcius. Determine the delta H (in units...
Thursday, July 12, 2012 at 3:10am by jen

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 .
Tuesday, May 11, 2010 at 7:54am by radhakrishnan

Physics 11th grade 'Heat'
1) Nova, whose mass is 50.0 kg, stays out skiing for too long and her body temperature drops by 2.00 degree celsius . What is the amount of heat lost from Nova's body? (cHuman body= 3470 J/kg degre celcius) 2) Phoebe's insulated foam cup is filled with 0.150 kg of the coffee (...
Wednesday, March 13, 2013 at 8:51am by Isis

Chemistry
Calculate the heat of solution of LiOH if addition of 25.0g of LiOH causes the temperature of 120.0ml of water to rise from 20.0 celcius to 29.0 celcius.
Friday, January 25, 2013 at 6:14am by Aditi

Chemistry Lab
So I did a kinetics lab on the rate of reaction of peroxydisulfate ion with iodide ion. Part 1 was the effect of concentration. One of the questions asked is to calculate the amount of thiosulfate consumed in moles. My results for trial 1 were (Times taken for consumption of 1...
Sunday, February 2, 2014 at 9:25pm by Anonymous

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.
Sunday, March 16, 2014 at 8:02am by manoj

Chemistry
How many joules (J) are needed to increase the temperature of 43.0g of aluminum from 25 degrees celcius to 50 degrees celcius? (Cp of Al=0.90J/g degrees of celcius) I also need the formula, data, and answer.
Thursday, October 10, 2013 at 11:41pm by Jaret

chemistry
when water kept at zero degree celcius it become ice.similarly what happens when ethanol kept at zero degree celcius?
Thursday, August 4, 2011 at 4:19am by mohan

chemistry
when water kept at zero degree celcius it become ice.similarly what happens when ethanol kept at zero degree celcius?
Thursday, August 4, 2011 at 4:19am by mohan

Physics
100 degree celcius because melting point of water is 100 degree celcius
Monday, May 28, 2012 at 10:38pm by may

Chemistry
By adding NaOH you have formed a buffered solution. Take 1 L soln, so you have 1000 x 0.559 M = 559 millimols PhCOOH. 1000 x 0.0225M = 22.5 mmols NaOH .......PhCOOH + NaOH ==> PhCOONa + H2O initial..559................0........0 added...........22.5................... ...
Tuesday, May 8, 2012 at 4:51pm by DrBob222

Physics
what is the final temperature of mixture, if 100gm of ice at 0 degree celcius into 100gm of water at 20 degree celcius in an iron vessel of mass 100gm.(specific heat of iron=0.1)
Saturday, February 2, 2013 at 10:06am by Manish

CHEMISTRY
Determine the followng solutes disolved in 100 g of water will form unsaturated or saturated solution a. 180g Kl at 60DGREE CELSIUS . 60g KBr at 30 DEGREE CELCIUS c170g KNO3 at 50 dgree celcius d. 20 g NaCl at 90Degree celcius
Sunday, February 16, 2014 at 10:29am by jhelo

Chemistry
Tutors: thanks for your help. Is this how this problem is solved ? A sample of Xenon gas at 20degrees celcius and 0.570atm is cooled to a pressure of 0.100atm. If the volume remains constant what is the final temperature in degree celcius? Solution: Using Gay-Lussac's Law to ...
Tuesday, November 23, 2010 at 6:49pm by Cliff

chemistry
Determine how many milliliters of 0.102M NaOH solution is needed to neutralize 35.0mL of 0.125M H2 SO4 solution.
Tuesday, March 1, 2011 at 6:44pm by jane

ecology
WHICH WEATHER SITUATION WILL BE THE LEAST COMFORTABLE FOR A LONG DISTANCE RUNNER? A.20* CELCIUS (68f) WITH RELATIVE HUMIDITY OF 40% B. 20* CELCIUS (68f) WITH RELATIVE HUMIDITY OF 90% C.25* CELCIUS (77 f) WITH RELATIVE HUMIDITY OF 90% D.35* CELCIUS (95 f) WITH RELATIVE HUMIDITY...
Saturday, September 6, 2008 at 6:30pm by JOSHUA

physics
a room with floor measurement 7m by 10m contains air of mass 750kg at a temperature of 34 degree celcius. the air is cold untill the temperature falls to 24 degree celcius. calculate the hight of the room
Tuesday, April 16, 2013 at 6:39am by bestuff

math
for each pair of substances, circle the substance with more thermal energy and explain why? A0 500g of water at 35 degree C VS. 500 g of water at 85 degree C B) 500 g of water at 35 degree C VS. 250 g of water at 35 degree C
Monday, December 19, 2011 at 12:02am by faith

Chemistry
Some N2 and H2 are placed in an empty 5.00 liter container at 500 degree celcius. When equilibrium is established, 3.0mol N2, 2.40mol H2 and 0.565mol of NH3 are present. Evaluate Kc for the reaction at 500 degree celcius.
Saturday, February 1, 2014 at 4:05am by Adigun

Chemistry
Some N2 and H2 are placed in an empty 5.00 liter container at 500 degree celcius. When equilibrium is established, 3.0mol N2, 2.40mol H2 and 0.565mol of NH3 are present. Evaluate Kc for the reaction at 500 degree celcius.
Saturday, February 1, 2014 at 4:06am by Adigun

chemistry
a process stream containing acetone vapour in nitrogen enters a cooler compressor at 65 degree celcius and 1 atm, with relative saturation of acetone equal to 50%. the gas is compressed and cooled to 20 degree celcius to recover 95% of acetone as a liquid. calculate the outlet...
Thursday, March 17, 2011 at 1:18pm by alicia

Heat & Properties of Matter
A platinum resistance thermometer has a resistance of 10.59ohms at 0 degree celcius and 15.59ohms at 100 degree celcius. Assuming that the resistance changes uniformly with temperature, what is: (i) the temperature when the resistance is 10.59ohms? (ii) the resistance of the ...
Friday, October 16, 2009 at 4:28am by Beta plus

Heat & Properties of Matter
A platinum resistance thermometer has a resistance of 10.59ohms at 0 degree celcius and 15.59ohms at 100 degree celcius. Assuming that the resistance changes uniformly with temperature, what is: (i) the temperature when the resistance is 10.59ohms? (ii) the resistance of the ...
Friday, October 16, 2009 at 4:29am by Beta plus

Chemistry
A student dissolved the KHP in 100.0mL of water instead of 50.0mL. Will the molar concentration of the NaOH solution determined from titrating be greater, less than, or unaffected by this mistake? Explain.
Tuesday, April 2, 2013 at 4:42pm by Lola

chemistry
Calculate the compositionof the gaseous mixture obtained when 1.25 mol f carbon dioxide is exposed to hot carbon at 800 degree celcius in a 1.25 liter vessel. The equilbrim constant kc at 800 degree celcius is 14 for the reaction CO2 + C = 2C0
Thursday, April 18, 2013 at 9:52pm by sam

Chemistry
You have 70.0mL x 0.207 M = 14.49 millimols which will use 43.47 mmols KOH. You have 70.0mL x 0.620M = 43.4 mmols KOH. So the reaction will produce 43.4 mmols (0.0434 mols product) or 173,200 J/mol x 0.0434 = ? J. ?J = mass soln x specific heat soln x (Tfinal-Tinitial) mass ...
Thursday, January 24, 2013 at 11:17am by DrBob222

Heat Energy
A container holds 3kg of water at 25 degree celcius. If 0.5kg of iron at 80 degree celcius is added to the water in the contain. What is the? (i) final temperature of the container. (ii) Quantity of heat gained by water
Tuesday, March 19, 2013 at 2:50pm by Precious

chemistry
The easy way is simple substitution. mL NaOH x M NaOH = mL HCl x M HCl mL NaOH x 0.15M = 35.00mL x 0.22M Solve for mL NaOH. I get (35.00*0.22/0.15) = approximately 51 mL NaOH. The only problem with working all titration problems that way is that not all titrations are 1:1 as ...
Friday, November 11, 2011 at 12:52am by DrBob222

chemistry
Consider the reaction HCl + NaOH ->NaCl + H2O Given: HCl Solution: 22 degrees celsius NaOH Solution: 22 degrees celsius Final Temperature: 26.1 degrees celsius A. Calculate the amount of heat evolved when 15 mL of 1.0 M HCl was mixed with 35 mL of 1.0 M NaOH B. Calculate ...
Monday, March 28, 2011 at 12:11pm by Vanessa

Physics
43 knots is 22.097 m/s. So could I now do 22.097 divided by 1.35?
Wednesday, October 3, 2007 at 3:29pm by Lindsay

Chemistry
A 35.0 g block of copper at 350.0 degrees celcius is added to a beaker containing 525 g of water at 35.0 degrees celcius. What is the final temperature of water?
Tuesday, November 27, 2012 at 10:27am by Maryam

physics
In lab you submerge 100 g of 41 degree Celcius iron nails in 100 g of 25 degree Celcius water (the specific heat of iron is 0.12 cal/g degrees Celcius) A)Equate the heat gained by the water to the heat lost by the nails and find the final temperature of the water. B)Your lab ...
Tuesday, April 3, 2012 at 3:42pm by christy

chemistry
How many molesof NaOH are present in 17.0ml of 0.250M NaOH
Wednesday, November 14, 2012 at 9:27am by Anonymous

Chemistry
A 35.0 mL sample of 0.150 M acetic acid is titrated with 0.150 M NaOH solution. Calculate the pH after the following volumes of base have been added: a) 0mL, b) 17.5 mL, c) 34.5 mL, d) 35 mL I've figured out a,b, and c. But at 35 mL the moles become equal so when I plug the ...
Thursday, October 28, 2010 at 4:20pm by Anonymous

chemistry
calculate the morality of THE H2SO4 solution for each of the three runs. do the three values agree closely together with each other. Part A. Titration 1 volume of unknown acid =20ml initial buret reading of NaOH =0.5 ml final buret reading of NaOH=10.0ml Titartion 2 volume of ...
Wednesday, October 17, 2012 at 1:33pm by ALECIA

general chemistry
How much heat in kilojoules is evolved in converting 1.50moles of steam at 150 degrees celcius to ice at -60.0 degrees celcius? The heat capacity of steam is 1.84J/g degree C and that of ice is 2.09J/g degree C.
Tuesday, April 3, 2012 at 9:05am by Candice

chemistry
a 10.0mL vinegar sample was completely neutralized by 22.5mL 0.2M NaOH solution. calculate molarity and % of acetic acid in vinegar. please help
Monday, April 26, 2010 at 9:58pm by confused

data range
Given the data set 10 40 22 43 35 18 27 22, which is the largest number of those listed below?
Sunday, May 1, 2011 at 11:45pm by Marshall

data range
Given the data set 10 40 22 43 35 18 27 22, which is the largest number of those listed below?
Sunday, May 1, 2011 at 11:47pm by Marshall

Algebra Help
If a term contains only one variable, then its degree determines the degree of that term e.g. -c^22 --- degree is 22 if the term contains multiple variables with exponents, then the degree of that term is the sum of those exponents. e.g. a^5c^10 has degree 15
Thursday, March 10, 2011 at 12:04pm by Reiny

chemistry
Describe how you would make 500.0mL of a 0.200M NaOH solution from a 15.0 stock NaOH conentration
Sunday, November 6, 2011 at 7:43am by Monique

Chemistry
.12M Lactic Acid (HC3H5O3, Ka=1.4x10^-4) is mixed with .10M NaC3H5O3 to form 1.00L solution. A. Calculate the pH of the solution after the addition of 50.0mL of 1.00M NaOH. B. Calculate the pH of the solution after the addition of 120.0mL of 1.00M NaOH.
Sunday, March 28, 2010 at 12:16pm by Emma

11th grade chemistry
a vessel contains 12 gm of methane gas at t degree celcius temp. and 1 atm. pressure. when the temp. is increased by 10 degree celcius at the same volume, the pressure increases by 10%. calculate the volume and initial temp.
Monday, November 8, 2010 at 1:09am by help

chemistry
how much heat is absorbed when 500.g of copper goes from 25.0 celcius to 35.0 celcius?
Thursday, April 7, 2011 at 5:22pm by Anonymous

college
1) You are given solutions of HCl and NaOH and must determine their concentrations. You use 37.0mL of NaOH to titrate 100mL of HCl and 13.6 mL of NaOH to titrate 50.0mL of 0.0782 M H2SO4. Find the unknown concentrations. Molarity of NaOH and molarity of HCL? 2) Sodium ...
Monday, October 4, 2010 at 3:02pm by Ashley

Chemistry
1) You are given solutions of HCl and NaOH and must determine their concentrations. You use 37.0mL of NaOH to titrate 100mL of HCl and 13.6 mL of NaOH to titrate 50.0mL of 0.0782 M H2SO4. Find the unknown concentrations. Molarity of NaOH and molarity of HCL? 2) Sodium ...
Monday, October 4, 2010 at 3:02pm by Ashley

Chemistry
1) You are given solutions of HCl and NaOH and must determine their concentrations. You use 37.0mL of NaOH to titrate 100mL of HCl and 13.6 mL of NaOH to titrate 50.0mL of 0.0782 M H2SO4. Find the unknown concentrations. Molarity of NaOH and molarity of HCL? 2) Sodium ...
Monday, October 4, 2010 at 3:03pm by Ashley

chemistry
KHP is a monoprotic acid with a molar mass of 204.22 g/mol. The titration data are as following. The average concentration of NaOH solution is M. 1 2 3 mass of KHP (g) 2.789 2.543 2.612 vol NaOH used (mL) 27.77 23.22 27.12 You didn't ask a question but I assume you are to ...
Wednesday, May 16, 2007 at 1:41am by jared

chem 2
A buffer is prepared by adding 300.0mL of 2.0M NaOH to 500.0mL of 2.0M CH3COOH. What is the pH of this buffer? ka=1.8x10-5
Saturday, March 3, 2012 at 1:31pm by tina

chemistry
1) the value of Kb after the decomposition of sulfur trioxide (S03). 2SO3 (g)--2SO2 (g) +O2 (g) is 1.79 x10^-5 at 350 degree celcius. if SO3 initially at 0.200 atm pressure comes to equilibrium in an otherwise empty tank at 350 degree celcius, determine the partial pressure of...
Saturday, November 6, 2010 at 4:57pm by michelle

chemistry
the value of Kp after the decomposition of sulfur trioxide (S03). 2SO3 (g)--2SO2 (g) +O2 (g) is 1.79 x10^-5 at 350 degree celcius. if SO3 initially at 0.200 atm pressure comes to equilibrium in an otherwise empty tank at 350 degree celcius, determine the partial pressure of O2...
Sunday, November 7, 2010 at 10:09am by linda

thermo
four hundred cubic centimeters of a gas at 740mm Hg absolute and 18 degree celcius a process until the pressure until the pressure becomes 760mm Hg absolute and the temperature o degree celcius. what is the final volume of the gas
Wednesday, October 3, 2012 at 6:43am by 111111

Chemistry 101
If 12.0g of molecular oxygen, O2, is required to inflate a balloon to a certain size at 27 degree celcius, what mass of molecular oxygen required to inflate it to the same size and pressure at 81 degree celcius?
Thursday, April 30, 2009 at 10:24pm by Eunice

Chemistry
Calculate the pH when 39.0mL of 0.321 of HA is mixed with 39.0mL of 0.321M NaOH where HA is a monoprotic weak acid with Ka= 7.5x10^-5 M ?
Saturday, March 24, 2012 at 6:53pm by Jematormal91

Chemistry
Please let me know how I am doing with the following three chemistry questions. 1.A sample of a gas in thermometer has a volume of 135mL at 11 degree celcius.Indicat what temperature(in k and degree celcius)would correspond to the foll.volume: (a)volume:113mL temperature ?? ...
Tuesday, November 23, 2010 at 4:17pm by Cliff

chemistry
What is the mole ratio of the reactants in a tube containing: Pb(NO3) 22.0mL 0.5 mol NaI 16.0mL 0.5 mol
Wednesday, March 10, 2010 at 2:10pm by BT

Science
A 5.0ml aliquot of a sample was transferred to a 25.0ml flask and acidified by addition of 2.5ml of 0.1M HClO4 and diluted to mark. 1.0ml of that solution was mixed with 5.0ml of 1 X 10-4M AYR(Aluminum)dye and 15.0ml ethanol in a 25.0ml flask and diluted to mark. What is the ...
Thursday, September 2, 2010 at 3:17pm by Eileen

chemistry
Q.1Explain why CH3COOH2^+ is in terms of protonic concept? Q.2 0.1 mole HCl is dissolved in distilled water of volume V then at a limit V =infinite pH of the solution is equal to______? Q.3One litre of water contains 10^-5 moles of H^+ ions at 25 degree Celcius.Degree of ...
Wednesday, January 6, 2010 at 7:49am by anonymous

science
What is the final temperature when you mix 40ml of 40degree celcius water and 25ml of 20 degree celcius water?
Wednesday, November 24, 2010 at 9:48pm by nim

chm
Calculate the PH OF A SOLUTION prepared by mixing 15.0mL OF 0.50 M OF NaOH AND 30.0mL OF 0.50 M BENZOIC ACID SOLUTION?( Benzoicacid is monoprotic and its dissociation constant is 6.5*10^-5)
Wednesday, March 31, 2010 at 4:23pm by ami

chemistry
When 50.0mL of 1.20 M of HCl (aq)is combined with 50.0mL of 1.30 M of NaOH (aq) in a coffee-cup calorimeter, the temperature of the solution increases by 8.01 Degrees C. What is the change in enthalpy for this balanced reaction? HCl(aq) + NaOH(aq) --yields-- NaCl(aq) + H20(l) ...
Wednesday, November 14, 2012 at 9:16pm by marcus

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