For each of the following compounds, please provide:

a) The best Lewis dot structure for the compound (include any non-zero formal charges). Draw this structure as a 3 dimensional representation that reflects the electron domain geometry for the compound.

b) The electron domain geometry for the compound. In other words, what would be the geometry if all lone pairs were replaced with atoms?

c) The molecular geometry for the compound. For the starred compounds below, there is more than one possible geometry. In that case, draw all possible geometries and indicate which of the geometries you have drawn is the best one, explaining how you arrived at the answer.

d) The location of any one mirror plane through the compound (if they exist). For example, CO2 has two sets of mirror places, one through the O-C-O axis, and another that bisects the O-C-O axis. Please be specific in your answer.

N₂O SeBr₄[*] ClOF₂+ XeF₃+[*]

SCl₃F₃ [*] I₃+ SCN- H₂SO₄   

Can you draw out the mechanisms of 1-butanol, 2-butanol, and 2-methyl-2-propanol with the HCl ZnCl2 reagent? I need full structures.

What is the pH of the solution obtained when 25.0 mL of 0.065M benzylamine, C7H7NH2, is titrated to the equivalence point with 0.050M HCl? Kb=4.7*10^-10. Part 2: What is the pH at the midpoint?

A buffer solution contains 0.72 mol of hydrosulfuric acid (H2S) and 0.70 mol of sodium hydrogen sulfide (NaHS) in 8.60 L. The Ka of hydrosulfuric acid (H2S) is Ka = 9.5e-08.

(a) What is the pH of this buffer?

pH =

(b) What is the pH of the buffer after the addition of 0.17 mol of NaOH? (assume no volume change)

pH =

(c) What is the pH of the original buffer after the addition of 0.53 mol of HI? (assume no volume change)

pH =

After studying biochemistry all day and night, you fall into a coma-like sleep for 12 hours. After a few hours of not eating, your body starts to say, “Hey, there is a low amount of glucose in my bloodstream, and my muscles that are keeping me alive right now are getting hungry for some energy production. I think I’ll let my pancreas secrete the hormone, glucagon, to go tell my liver and muscle cells to affect their carbohydrate metabolism.” Outline what happens after the glucagon binds to receptors on the outside of your liver/muscle cells. Make sure to mention all of the effected enzymes and major processes involved in carbohydrate metabolism.

1) According to the activity series, which of these metals will react with most acids to produce H2 gas?

Ag, Ni, or K?

2) Calculate the molarity:

a) 0.750 mol of Na2S in 1.30L of solution. b) 32.7g of MgS in 773ml of solution.

3) What is the reduction half-reaction in Cl2+2Na ---> 2NaCl?

4) How many mL of 11.0 M HCL (aq) are needed to prepare 720.0ml of 1.00 M HCL (aq)?

5) 63.0 ml of a 1.50M solution is diluted to a total volume of 248ml. A 124ml portion of that solution is diluted by adding 161ml of water. What is the final concentration? Assume the volumes are additive.

Which of the compounds listed below, when added to water, is/are likely to increase the solubility of AgCl?

Ammonia, NH3
Sodium cyanide, NaCN
Potassium chloride, KCl

little explanation pls

A buffered solution containing dissolved aniline, C6H5NH2, and aniline hydrochloride, C6H5NH3Cl, has a pH of 5.40.

a) Determine the concentration of C6H5NH3 in the solution if the concentration of C6H5NH2 is 0.215 M. The pKb of aniline is 9.13.

b) Calculate the change in pH of the solution, ΔpH, if 0.362 g NaOH is added to the buffer for a final volume of 1.45 L.

Questions

Part A:
Based on the analysis of your local water, would you classify its hardness as soft, moderate, hard, or very hard? Explain your answer.

Part B
Approximately how much calcium would you ingest by drinking eight 8-oz glasses of your local water? Hint: 1 oz (fluid ounce) = 29.57 mL.

Part C
Assume an average minimum daily requirement for calcium is 1,150 mg. Calculate what percentage of your daily requirements could be met by drinking 1.0 L of your local water.

Cloth can be waterproofed by coating it with a silicone layer. This is done by exposing the cloth to (CH3)2 SiCl2 vapor. The silicon compound reacts with OH groups on the cloth to form a waterproofing film (density = 1.0 g/cm3) of [(CH3)2SiO]n, where n is a large integer number. The coating is added layer by layer, with each layer of [(CH3)2SiO]n being 0.60 nm thick. Suppose you want to waterproof a piece of cloth that is 5.00 square meters, and you want 290 layers of waterproofing compound on the cloth. What mass of (CH3)2SiCl2 do you need?

Why is nitrous oxide a greater contributor to greenhouse gas than carbon dioxide? Give two reasons based on vibrational modes and IR absorbance etc. I already stated that it has more IR active vibrational modes.

A solution is X M in Al(ClO3)3 the solution is titrated with a solution of I2. To completely react the Al(ClO3)3 in 23.24 ml, 17.52 of a 0.0457M I2 solution was needed. what is the molarity of the Al(ClO3)3 solution?

5ClO₃^-+ 3H₂O+ 3I₂ -----> 5Cl^-+ 6HIO₃

Reasonable efficiency for converting chemical energy to electrical energy via combustion is 30%. Calculate how many pounds of coal must be burned to run your reading lamp for two hours of studying for a chemistry exam. A typical reading lamP has a 75 W bulb. Assume that coal is pure graphite. (1 W = 1 J/s.)

_______lbs

In today experiment you will perform the reduction of 4-t-butylcyclohexanone to synthesize a mixture of cis- and trans- 4-t-butylcyclohexanol. Answer the following questions regarding this reaction:

1.The reduction of 4-tert-butylcyclohexanone with sodium borohydride is a stereoselective reaction. What does this mean, in terms of the products that were isolated?

2. Why the reduction is done in methanol and not in water?

3. Why in the reaction a very big excess of NaBH₄ will be used?

4.Compare and contrast the (A) reductive abilities of LiAlH₄ with those of NaBH₄, and, (B) compatibility of the two reducing agents with protic solvents (water, alcohols). Use as reference internet sources and your lecture manual. After the comparison, decide why NaBH₄ was used in the reduction of 4-t-butylcyclohexanone (your experiment) rather than LiAlH₄.

5.After the reduction the product mixture is quenched with cold dilute HCl. Why do we do that?

6.To isolate the reaction product you will perform an extraction. What solvent will be used for extraction and what layer is on the bottom? Circle the correct response:   Et₂O,   H₂O,   CH₂Cl₂, pentane.

7. What is the purpose of adding anhydrous Na₂SO₄ in step 8 of the procedure, before the filtration of the combined CH₂Cl₂ extracts?

8. Why do you expect cis- and trans-4-t-butylcyclohexanol to be separable by GC? Do you expect more cis- or trans-4-t-butylcyclohexanol?

9. Is the reaction thermodynamically or kinetically controlled?

10.Calculate the theoretical and actual % yield for the reduction of 50.0 mg 4-t-butylcyclohexanone (MW = 154.3 mg/mmol) with excess NaBH₄ to obtain 30.0 mg of product (MW = 156.3 mg/mmol). Show your calculations with the proper units.