Section 3: 3a. Draw the best Lewis structure for the following two acid molecules (Hint! the acidic H is bonded to O in an acid molecule). Evaluate each atom in both molecules using formal charge, showing all your math work as well as your formal charge answers. HCIO4 CH3COOH b. The N3 ion can be drawn with two double bonds, or with a single bond and a triple bond. Both structures satisfy the octet rule. Use formal charge to evaluate the structures. Which do you think is the better choice? Give reasons to support your choice. Section 4: 4. Chloromethane, CH;Cl has many uses, one of which is an extractant for oils. Chemists often use the phrase "like dissolves ike" to summarize the observation that polar solvents prefer to interact with polar molecules, and nonpolar solvents prefer to interact with nonpolar molecules. Use this fact to explain why Chloromethane, CH3CI, is a good extractant for oils. Oils are nonpolar substances containing carbon and hydrogen atoms. In formulating your answer, include the following information below: a. What is the molecular geometry (shape) of the CH3CI molecule? b. Is CH;Cl polar or non-polar? How did you determine that? Mark the polarity on the CH;Cl molecule using the molecular dipole moment arrow. c. Explain why CH3CI would make sense to extract non-polar substances, such as oils.

. Which of the following would be a homogeneous mixture? A) graphite B) milk C) brass D) polycarbonate E) all are homogeneous mixes

A quantity of substance that can be seen would be considered the A level.

The physical state in which matter is not hard to compress is:A) solid B) liquid C) gas D) both liquid and gas

Below are 3 real life situations. Pick two (2) them and explain ALL the science involved in the scenario. This means describe things like what is happening to the gas/liquid/solid molecules or atoms, which principles or laws are at work, why what is happening is happening, and how you know.  At sea level, a pot of water will boil at 100 °C. Suppose you wanted to boil the same amount of water high in the Rocky Mountains. What do you expect the temperature will need to be (generally speaking)? Why?   A can of soda sits in a sunny spot on the window sill for several hours. It is then opened at the same time as a cold can of soda from the refrigerator. What happens and why?   Weather balloons do not float out into space. They reach an altitude of about 15 miles above the surface (3x the height of Mt Everest) and they burst. Why?

) A 1 gallon bottle of a certain brand of bleach costs $1.49. Determine the cost to buy enough bleach to supply 100.0 grams of active ingredient (NaOCl), assuming 6.25% active ingredient by mass and a density of 1.05 g/ml.

Which of the following is an illustration of the law of constanticomposition? A) Water is a compound. B Water can be separated into other substances by a chemical process. C Water and salt have different boiling points. D) Water is 11% hydrogen and 89% oxygen by mass. Water boils at 100 °C at 1 atm pressure,

Every year Every second (1 year 365 days).

1.There 17 quips in 1 flop. There are 0.381 flops in 1 trot. There 5.5 trots in 1 maps. How manga cubic trots (trots^3) in 1.25 cubic flops (flops^3)

Cl₂(g) + 2e Cr₂0 (aq) + 14 H(aq) + 6€¯ O2(g) +4 H(aq) + 4e¯ MnO2(s) + 4H(aq) + 2e¯ 10, (aq) +6H(aq) +5e¯ VO₂+ (aq) + 2H(aq) + e¯ Br₂(1) + 2e NO, (aq) +4 H(aq) + 3e¯ ClO2(g) + e 2 Cl(aq) Ag* (aq) + e Fe3+(aq) + e 2 Cr³+ (aq) + 7 H₂O(1) 1.36 1.33 2 H₂O(1) 1.23 Mn2+(aq) + 2 H₂O(1) 1.21 12(aq) + 3H2O(l) 1.20 VO²+(aq) + H₂O(1) 1.00 2 Br (aq) 1.09 NO(s) + 2 H2O(1) 0.96 CIO₂ (aq) 0.95 Ag(s) 0.80 Fe2+(aq) 0.77 What is the E° cell for the reaction Cr₂O²² + CIO₂ → Cr³+ + CIO₂? a. 2.28 V. b. -2.28 V. c. 0.38 V. d. -0.38 V.