Sunday
May 19, 2013

# Posts by tracy

Total # Posts: 586

Physics
Which of the following statatements is correct? a. Thermos bottles keep food warm by combating heat loss through convection. b. A thick quilt is an example of an isulator with a low R value c. An object that is cool to the touch at room temperature is a poor conductor of heat ...

Physics
Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that the lake has frozen solid and that the ice starts off at -3 C. How much energy would the lake need to absorb from the Sun to cause it to evaporate completely? Each gram of water will require 721.5 calories ...

Chemistry
Thank you so much Dr. Bob

Chemistry
For A+2B <-> 2C and Kc = 2.13 For 2C <-> D and Kc = 0.254 Calculate the value of equilibrium contant for the reaction D <-> A+2B I'm so sorry to bother anyone.. but am i only supposed to multiple 2.13 and 0.254 together in order to get the third value of ...

Chemistry

Chemistry
At 389K, this reaction has a Kc value of 0.0682. 2X(g) + 2Y(g) <-> Z(g) .. Calculate Kp at 389K. Kp= this is what I did.. can somebody confirm or find any mistakes in my thought process? Kp = Kc(R)(T)^Delta n Delta n = (1)-(2+2) = -3 Kp = (0.0682)(0.08206)(398K)^-3 = 0.0...

Chemistry
ohhh it was no effect and no effect for 1 and 3 i got it

Chemistry
Ohh i understand Dr. Bob. So in terms of adding more.. would that be the same as increasing concentration? For example: S(s) + O2(g) <-> SO2 1] how will adding more S(s) shift the equilibrium? a] to the right [this?] b] to the left c] no effect 2] How will removing some ...

Chemistry
Did I answer this equilibrium question correctly? 2CO(g) + O2(g) <-> 2CO2(g) 1) How will increasing the concentration of CO shift the equilibrium? a] to the right [i chose this] b] to the left c] no effect 2] how will increasing the concentration of CO2 shift the equilib...

Physics
Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that the lake has frozen solid and that the ice starts off at -3 C. How much energy would the lake need to absorb from the Sun to cause it to evaporate completely?

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