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August 30, 2014

Posts by Capacino


Total # Posts: 16

chemistry
I have really been struggling with this class and it does feel like I am just plugging numbers into a calculator. The odds of me passing are slim but I am not a quieter. I heard about this site to help me out and you guys have more then you know, if you guys help me with an ...
June 25, 2009

chemistry
Your tone in your message seems a little mean spirited, I am trying the best I can. Have you ever tried to do something your not very good at?
June 25, 2009

chemistry
6.70 A sample of benzene, C6H6, weighing 3.51g was burned in an excess of oxygen in bomb calorimeter. The temperature of the calorimeter rose from 25.00C to 37.18C. If the heat capacity of the calorimeter and contents was 12.05kJ/C, what is the value of q for burning 1.25 mol ...
June 25, 2009

chemistry
When ice at 0C melts to liquid water at 0C, it absorbs 0.334 kj of heat per gram. Suppose the heat needed to melt 31.5 g of ice is absorbed from the water contained in a glass. If this water has a mass of .210 kg and a temperature of 21.0C, what is the final temperature of the...
June 24, 2009

chemistry
2.48/46.068g/mol ethanol=.06165 .06165x9.63kj/C x (33.73C-25C)= 5.183 ?? still not the -00136kJ I am looking for??
June 24, 2009

chemistry
Here is the question: A sample of ethanol, C2H5OH, weighing 2.84g was burned in an excess of oxygen in a bomb calorimeter. THe temperature of the calorimeter rose from 24C to 33.73C. If the heat capacity of the calorimeter and contents was 9.63 kj/C. What is the calue of q for...
June 24, 2009

chemistry
I just cant figure out the theoretical yield???
June 21, 2009

chemistry
Long but quick chemistry lab that I need confirmation on answers? OK so I have this lab that went pretty quick and smooth and I have an online assessment that I needed to put all my figures in. I am all complete but am still having trouble with 1 problems that the assessment ...
June 21, 2009

chemistry
Long but quick chemistry lab that I need confirmation on answers if possible? OK so I have this lab that went pretty quick and smooth and I have an online assessment that I needed to put all my figures in. I am all complete but am having trouble with 3 problems that the ...
June 20, 2009

chemistry
Gas A has a density that is 1.20 times that of gas B. If gas A effuses through an orifice at a rate of 3.41g/L, at what rate will gas B effuse? Hint: Ratio the molecular masses to the densities. Use this information with Graham's law of diffusion. Note that 3.41g/L is a ...
June 19, 2009

chemistry
Effusion/Diffusion Chemistry Help!!! If 4.83mL of an unknown gas effuses through a hole in a plate in the same time it takes 9.23mL of Argon, Ar, to effuse through the same hole under the same conditions, what is the molecular mass of the unknown gas? (146amu) Responses: * ...
June 18, 2009

Chemistry
sqrt of 92.011/30.006=1.751 x .0129 = .0226 mol of NO
June 17, 2009

Chemistry
I cannot figure it out this way at all, I have been trying for a while with no success. If there is any other figures that you could add it would be appreciated. I was trying to do it this way: Rate1 / Rate2 = square root of (Mass2 / Mass 1) but I am not coming up with .0226? ...
June 17, 2009

Chemistry
Effusion/Diffusion Chemistry Help!! If 0.0129 mol of dinitrogen tetroxide effuses through a pinhole in a certain amount of time, how much NO would effuse in that same amount of time under the same conditions? (0.0226)
June 17, 2009

chemistry
TY
June 17, 2009

chemistry
Effusion/Diffusion Chemistry Help!!! If 4.83mL of an unknown gas effuses through a hole in a plate in the same time it takes 9.23mL of Argon, Ar, to effuse through the same hole under the same conditions, what is the molecular mass of the unknown gas? (146amu)
June 17, 2009

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