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Ethanol (CH3CH2OH) is the alcohol found in beverages. It is oxidized in the body to acetaldehyde by the enzyme alcohol dehydrogenase. Methanol (CH3OH), also known as wood alcohol, is converted to formaldehyde by the same enzyme. Acetaldehyde is toxic, but formaldehyde is far more toxic to humans, which is why the ingestion of relatively small amounts of methanol can cause blindness or death. One treatment for mild methanol poisoning is the administration of ethanol. Why might a doctor choose this treatment? A. Ethanol likely irreversibly binds to alcohol dehydrogenase which prevents the formation of formaldehyde. B. The doctor has given up on the patient and administers ethanol for sedation. C. Ethanol must act as a competitive inhibitor for the alcohol dehydrogenase and therefore slows the formation of formaldehyde. D. The ethanol is likely an uncompetitive inhibitor and binds to a site other than the active site of the enzyme.

B

Q5:

Complete each of the following chemical reactions.

Consider a protein with five amino acids and three possible energy levels (separated by 1 J/mol) each amino acid can occupy. At what temperature will there be 45% of molecules in conformation A and 55% of molecules in conformation B? Comment on the size of this number and what distribution you would expect at room temperature. What does this mean about how "different" these energy levels are? Look back at the figure and propose an error made in reporting units. What energy unit would have likely been more appropriate in this case?

PAP Chemistry-2903012-42100P-1/ Le Chatelier's Principle/ Lesson 128 2. Zinc (Zn) granules react slowly with dilute hydrochloric acid (HCI), but much faster if the acid is concentrated. Zn(s) 2HCI(aq)ZnCl2(aq) + H2(g) Zinc + Hydrochloric Acid Zinc Chloride + Hydrogen What causes the reaction to proceed faster with concentrated acid? The concentrated hydrochloric acid causes more hydrogen gas to be produced. The pressure of hydrogen gas molecules increases as concentration increases. The concentrated hydrochloric acid molecules move faster than in dilute acid. There are more collisions between the zinc and concentrated hydrochloric acid. PREVIOU

A discharge pipe releases small amounts of various alcohols from an industrial fermentation process into a lake. Local scientists would like to estimate the rate at which the alcohols are degrading in the lake. One of them, butanol (C4H9OH), is released to the lake at a rate of 20 kg/day. Butanol is measured in the lake water on several occasions at a concentration of 10-4 kg/m3; no butanol is detected in the inflowing stream. Average streamflow at the outlet of the lake is measured to be 3 x 104 m3/day. What is the magnitude of internal sinks of butanol? Assume there is not butanol exchange with the atmosphere.

Can the molecule on the right-hand side of this organic reaction be made in good yield from no more than two reactants, in one step, by moderately heating the reactants? ? Δ 100 • If your answer is yes, then draw the reactant or reactants in the drawing area below. You can draw the reactants in any arrangement you like. • If your answer is no, check the box under the drawing area instead.

OTS OTS OTS OH NaOEt NaCN EtOH NaCN Hexan H₂SO4

Based on a grade 11 chemistry student, answer the following question based on the provided tables: Part G:  Final Identification of the Poison By this time, Tylenol has been pulled off the shelves at all of the stores in the area and a nationwide recall has been announced.  Several suspicious capsules have been found and tested.   The contents of the capsules contain a compound with a nitrogen content of greater than 15% and a carbon content of less than 50%.   What is the poison in the capsule?  Provide calculations to support your answer.

The real benzene molecule is 152 kJ/ mole more stable than the imaginary 1,3,5-cyclohexatriene. What do we call this 152 kJ/mole? A destabilization energy steric energy C oxidation energy D hydrogenation energy E resonance energy B

In the drawing areas below, draw the two most expected stable conformations of the following molecule: Br Br Be sure your drawings make it possible to distinguish between the conformations. After you've drawn the conformations, answer the question below the drawing areas. × Click and drag to start drawing a structure. O left O right Of the two conformations you drew above, which is the more stable? chair flip O they are equally stable cannot decide without more information X Click and drag to start drawing a structure. ?

Part 3 of 3 Modify the structure of lactulose to show the monosaccharide products that form from hydrolysis. You may draw the structures in any arrangement that you like, so long as they aren't touching. он H сн, он :☐ Он × 5 H H HO снон Сн, он H Он Н д- Н Н OH Н

When Fructose (shown below) undergoes reduction in the presence of H2 and Pd, two compounds are generated. What is the relationship between the two compounds generated? ОН Но— Н H. OH H OH HO.

Synthesis

The compound provided belongs to what class of biological compounds? H3N CH C—0 N CH₂ NH A/

Take a look at this organic reaction: CH3- 0=0 C O NAD+ NADH CH₂_1-0 CH3—C−O + CO2 The reactant molecule is re-drawn in the drawing area below. Highlight in red any groups in this molecule in which carbon atoms are oxidized by the reaction. Highlight in blue any groups in which carbon atoms are reduced. If no carbon atoms are oxidized or reduced, check the box under the drawing area. _L_L- C CH₂ - No carbons are oxidized or reduced. Ć

2. Examine the two scenarios below. • Scenario A: 100 g of glucose in the presence of unlimited oxygen is metabolized through aerobic respiration. • Scenario B: 100 g of glucose in the absence of oxygen is metabolized through anaerobic respiration. Would the mass of products produced in Scenario A be greater than, less than, or equal to the mass of products produced in Scenario B? Justify your answer.

Predict the product(s) obtained when each of the following compounds is treated with a mixture of nitric acid and sulfuric acid. Select all that apply. 18.41d * Your answer is incorrect.

I'm stuck on part  d, e, f, and g. Please help

Use a sheet of paper to answer the following question. Take a picture of your answers and attach to this assignment. Draw the major organic product formed in each of the following transition-metal catalyzed reactions:

Draw Suve the to products specify of the reactions below, making stereo chemistry where applicable.

HO HO ܦܐܐ ܒܐܠܥܐ HO HO OH OH HO- OH HO HO- OH Barley grain is used in the production of beer. This grain contains many polysaccharides which are hydrolyzed into sugars for yeast fermentation. Beta-glucans are polymers of glucose units. Many of these polysaccharides have a lot of branching. Identify the glycosidic linkages in this beta-glucan polysaccharide. OH OH OH HO Question 1.b of 45 HO OH A) a-1,4-linkages B) B-1,4-linkages C) a mix of a-1,3 and a-1,4-linkages D) a mix of B-1,3 and ß-1,4-linkages E) a mix of a-1,3 and ß-1,4-linkages Submit +