Fall 2018

07 Sep: If SCST needs to be evacuated while we are in class, how will you exit the building and where is the meeting place?

10 Sep: Estimate the mass of a penny assuming it is pure copper (density = 8920 kg/m3) and the diameter of a penny is 2cm and its thickness is 1mm.

12 Sep: Sketch the Rutherford model of the atom. Indicate the locations of the three subatomic particles.

Problem Set 1 ("Cobalt") is due 14 Sep, in class at 8am. ProblemSet1.pdf

16 Sep: Fill in the ? for the following nuclear equations.
copper-64 --> beta-particle + ?
nitrogen-14 + alpha-particle --> hydrogen-1 + ?

21 Sep: Match the following categories to either waves of red light or blue light: Longer wavelength, shorter wavelength, faster oscillation, slower oscillation.

24 Sep: In the H atom, which emits a photon of higher energy and why?
Electron transition from n=6 to n=4
Electron transition from n=5 to n=3

28 Sep: What is known about the 4 quantum numbers for: (a) 3p_y orbital (b) 4s orbital.

Problem Set 2 ("Magnesium") is due 03 Oct, in class at 8am. ProblemSet2.pdf

03 Oct: Write the ground state electron configuration of (a) selenium atom (b) niobium(+1) cation

12 Oct: Write the chemical formula of (a) calcium nitride (b) potassium sulfate

15 Oct: Given a picture of the unit cell structure of perovskite, determine its chemical formula.

Problem Set 3 ("Magnesium Hydride") is due 17 Oct, in class at 8am. ProblemSet3.pdf

22 Oct: Draw the good Lewis structures of (a) carbon dioxide (b) phosphorus trichloride

26 Oct: Draw the best Lewis structure(s) of the BrO2(-) anion. What is its molecular shape? Estimate the bond angle.

Problem Set 4 ("Nitrogen Oxides") is due 26 Oct, in class at 8am. ProblemSet4.pdf

29 Oct: Order the following bonds from strongest to weakest: C-C, C=C, C-H, C-F, C-Br

02 Nov: Although diamond and graphite are solid carbon, one conducts electricity and the other does not. Explain.

07 Nov: What intermolecular forces are present in (i) H2O (ii) H2S ?

09 Nov: What is one interesting thing you learned from today's reading about water?

14 Nov: If equal masses of methane and oxygen gas were burned in a container to produce carbon dioxide and water with 100% yield, which of the following statements is true?
(A) Some methane gas will be leftover
(B) Some oxygen gas will be leftover
(C) Both methane and oxygen gasses will be completely consumed in the reaction and therefore neither will be leftover.
Write a one or two-sentence explanation to support your answer.

Problem Set 5 ("Real Problems") is due 19 Nov, in class at 8am. ProblemSet5.pdf

28 Nov: When a solution of lead(II) perchlorate Pb(ClO4)2 was added to a solution of sodium iodide, a yellow precipitate of lead iodide was formed. Write the overall chemical equation, the net ionic equation, and identify the spectator ions.

30 Nov: For the smelting of iron ore to make iron, 2 Fe2O3 + 3 C --> 4 Fe + 3 CO2
(a) What are the oxidation numbers for each element in each substance?
(b) Identify the oxidizing and reducing agents in this reaction.

05 Dec: What is the temperature in Celcius of 500 mol of an ideal gas occupying 20.0 m3 at 2.5 atm?

07 Dec: How much faster do N2(g) molecules diffuse compared to O2(g) molecules at 500 K?

Problem Set 6 ("Martian Atmosphere") is due 12 Dec, in class at 8am. ProblemSet6.pdf