in a 1x10^-8 M solution of HNO3(aq) at 25C identify the relative molar amounts of these species from least to most

OH- , H2O , HNO3 , H3O+ , NO3-

Methanol and ethanol are both oxidized by alcohol dehydrogenase (ADH). Methanol is poisonous because it is oxidized by ADH to form the highly toxic compound formaldehyde. The adult body has 40 L of water, throughout which these alcohols are rapidly and uniformly distributed. The densities of both alcohols are 0.79 g/mL. The Km of ADH for ethanol is 1.0x10-3 M, and for methanol the Km is 1.0x10-2 M. The molecular mass of methanol is 32 g/mol and that of ethanol is 46 g/mol. If an individual consumed 100 mL of methanol (a leathal amount), how much 100-proof whiskey (50% ethanol by volume) must this person consume in order to reduce the activity of ADH toward methanol to 5%? Assume the Ki for ethanol = Km.

The product of a Diels Alder reaction is often a pair of enantiomers. Does the reaction of 9 10-dihydroanthracene-9 10-a b-succinic anhydride produce enantiomers? If yes, please draw each enantiomer. If your answer is no explain why using accurate structural drawings.

What is the pH of 1.000 L of a solution of 100.0 g of glutamic acid (C5H9NO4, a diprotic acid; K1 = 8.5 ×
10−5, K2 = 3.39 × 10−10) to which has been added 20.0 g of NaOH during the preparation of monosodium
glutamate, the flavoring agent? What is the pH when exactly 1 mol of NaOH per mole of acid has been added?

IF YOU COPY AND PASTE THE ANSWER FROM YAHOO ANSWERS, I WILL NOT RATE AND I WILL ALSO REPORT FOR NON-ORIGINAL WORK. Please stop copy and pasting Yahoo! Answers, it is wrong, that is why I am posting this ? on here.

A fuel oil is composed of C₁₀H₂₂ and C₁₂H₂₆ in an unknown ratio (Note, there are no other significant components in the fuel oil). When the fuel oil is burned with 20% excess air the exhaust is tested and the ratio of water to CO₂ is found to be 1.088. Please note that the reaction proceeds to 100% completion (i.e. there is no detectable unburned fuel oil or carbon monoxide).   Determine the composition of the fuel oil.

Classify the following ionic compounds according to the Sigma-Aldrich solubility scale based on their molar solubility (S).

Answer choices are: Very Soluble, Freely Soluble, Soluble, Sparingly Soluble, Slightly Soluble, Very Slightly Soluble, and Practically Insoluble.

a) Silver nitrite (AgNO₂), S = 0.27 M. Answer is

b) Lithium Phosphate (Li₃PO₄), S = 3.4 x 10^-3 M. Answer is

c) Aluminum Fluoride (AlF₃), S = 8.6 x 10^-2 M. Answer is

d) Tin (II) Iodide (SnI₂), S = 2.9 x 10^-2 M. Answer is

The following reaction is similar to the breathing cycle of plants:

4KO2(s)   + 2CO2 (g)   ®2K2CO3 (s) + 3O2 (g) Calculate change inH for the above reaction from the following data:

change in H (kcal)

K(s)   + O2 (g)   ®KO2 (s)                                                           -134.0

KOH(s)   + CO2 (g)   ®KHCO3(s)                                                -33.5

2KHCO3(s) ®CO2(g) + H2O(g) + K2CO3(s) +33.0

2K(s) + 2H2O(g)   ®2KOH(s) + H2 (g)                                         -88.0

H2 (g)   + 1/2O2(g)   ®H2O(g)                                                      -57.8

Draw and name the ten seven-carbon long chains for octyne (C₈H₁₄). Hint: each isomer will have a single methyl substituent. (Place a star next to each chiral carbon)

1.) Explain the following observations in terms of shifting equilibria by Le Chatelier's Principle. Write the equation for the equilibrium involved in each case.

a.) barium chromate, BaCrO4, is insoluble in basic solution but dissolves readily in acidic solution.

b.) The addition of NaOH to the iron (III)- thiocyanate equilibrium causes the red color to disappear and a rust colored precipitate to form.

c.) The solubility of lead chloride, PbCl2, in 0.10 M HCl is much lower than in pure water.

d.) Limestone, CaCO3, is an insoluble salt but will dissolve in acid.

e.) For part C, how does the rate of the reaction vary as the temperature is increased? Explain.

Sodium carbonate (1.3579 g) was dissolved in deionized water to give a solution with a total volume of 100.0 mL. What was the pH of the resulting solution?

Calculate the pH of the solution that results from mixing 35.0 mL of 0.18 M formic acid and 70.0 mL of 0.090 M sodium hydroxide. ( value for formic acid is 1.8*10-4.)

An aluminum rod is subject to electrolysis in an aqueous solution resulting in the production of Al2O3

at the _______________ and H2 gas at the _______________.

a. Give the balanced anode and cathode half reactions.

Anode Half-Reaction:______________________________________________________________________________________

Cathode Half-Reaction:____________________________________________________________________________________

b. How many grams of Al2O3 are produced using a constant current of 142 A for 5.00 minutes?

Answer:____________________________

c. How many minutes are required to produce 2.00 L of H2 gas at STP at a constant current of 142 A?

Answer:____________________________

Part A

How long does it take a person at rest to breathe one mole of air if the person breathes 84.0 mL/s of air that is measured at 25 ∘C and 755 mmHg? Express your answer numerically in seconds.

Part B

Typically, when a person coughs, he or she first inhales about 2.50 L of air at 1.00 atm and 25 ∘C. The epiglottis and the vocal cords then shut, trapping the air in the lungs, where it is warmed to 37 ∘C and compressed to a volume of about 1.70L by the action of the diaphragm and chest muscles. The sudden opening of the epiglottis and vocal cords releases this air explosively. Just prior to this release, what is the approximate pressure of the gas inside the lungs?

Express your answer numerically in atmospheres.

Part C

Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.508 g/L at 25 ∘C and 721 mmHg?

Express your answer numerically as a percentage.

-Please Check my calculations-

Mass Data for preparation of Alum

Mass Weighing paper: 0.3832 grams

Mass Weighing paper plus Aluminum: 1.3838 grams

Mass of watch glass: 56.5001 grams

Mass of watch glass plus dry alum: 68.8550

Balanced Equation: 2Al(s)+2KOH(aq)+4H2SO4(aq)+22H2O(l)=2KAl(SO4)2*12H2O(s)+3H2(g)

Yields of Alum

Mass of aluminum: 1.0006 grams

Mass of dry alum: 12.354 grams

Theoretical Yield:

1.0006/26.98 = .03709 moles Al (Mass Aluminum/Molar Mass)

.03709 * 474.3884g/mole Alum = 17.595 grams Alum (Moles Al/Molar Mass of Alum)

Percent Yield

Actual/Theoritical x 100%

12.3549/17.595 = .7022 *100= 70.22%