Cesium 2013

Homework for today. By the way, the payments for the class pictures are due next Friday. It's P50 a picture so give the payments to LJ... Or Gan. I'm not sure.


Chem HW (on a 1/2 crosswise T__T)
10.54
A mixture containing 3.15 g each of CH₄(g), C₂H₄(g), and C₄H₁₀(g) is contained in a 2.00-L flask at a temperature of 64ºC. (a) Calculate the partial pressure of each of the gases in the mixture. (b) Calculate the total pressure of the mixture.

10.56
A Mixture of gases contains 12.47 g of N₂, 0.30mol of O₂, and 0.15 mol of CO₂. If the total pressure of the mixture is 1.56 atm, what is the partial pressure of each component?

10.60
A sample of 5.25 g of SO₂(g) was originally in a 4.00-L vessel at 26ºC is transferred to a 13.6-L vessel at 25ºC. A sample of 2.35g N₂(g) originally in a 3.18-L vessel at 20ºC is transferred to thi same 13.6-L vessel. (a) What is the partial pressure of SO₂(g) in the larger container? (b) What is the partial pressure of N₂(g) in this vessel? (c) What is the total pressure in the vessel?

10.62
Indicate which of the following statements regarding the kinetic-molecular theory of gases are correct. For those that are false, formulate a correct version of the statement. (a) The average kinetic energy of a collection of gas molecules at a given remperature is proportional to M^1/2. (b) The gas molecules are assumed to exert no forces on each other. (c) All the molecules of a gas at a given temperature have the same kinetic energy. (d) The volume of the gas molecules is negligible in comparison to the total volume in which the gas is contained.

Math HW (1 whole, i think)
Reminder: Speed test tomorrow! Memorize the sines, cosines, and tangents of the special angles.

I. Simplify and give the answer in terms of cosine.
1.) (cos²θ-1)+(sin²θ)
2.) (1+tan²θ)(sec²θ)
3.) (1-sin²θ)/cosθ
4.)sec²θ/cosθ + cosθ
5.)(cotθ-sinθ)/cscθ
6.) secθ-(sinθtanθ)
II. Simplify and give answer in terms of sine.
7.) cos²θ - sin²θ
8.) tan²θ • csc²θ
II. Simplify and give answer in terms of sine and cosine.
9.) (secθ+cscθ)/(cosθ+sinθ)
10.) secθ/(tanθ+cotθ)

English: Read short stories.
Fil: Start on your short stories.