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Describe the role of the citric acid cycle as a central metabolic mechanism. Explain what happens to the cells' abilities to oxidize acetyl CoA when intermediates of the cycle are drained off for am
A bottle of vinegar has an acetic acid concentration of 0.78M. What are the equilibrium concentrations, the pH and percent ionization of the acetic acid?
Given a stock solution of a food dye having a concentration of 1.0 x 10-5 and an absorbance of 0.700. If a new solution is made by diluting exactly 10.0 mL of the solution with exactly 15.4 mL of di
Sn2 reactions occur at different rates depending on the structure of the substrate in the reaction. Would an Sn2 reaction occur at a faster rate on a primary or a tertiary substrate ? Briefly, Expla
Akyl halides tend to be relatively non-polar covalent compounds. They dissolve in non-polar solvents but are insoluble in water.
Consider the halide ions as nucleophiles. Briefly explain why F-, the strongest base among the halide ions, is the best nucleophile in polar aprotic solvents while iodide the weakest base is the best
The combustion of propane illustrated by the following reaction releases 2428 KJ per mole of reaction. A sample of propane is burned at 59 degrees celsius and 746 mm Hg. The process produces 39.7 L
The boiling point of methanol (CH3OH) is 64.7 oC and delta H vap = 71.8 kJ/mol. What is delta S for the vaporization of 2.15 mol of CH3OH at 64.7 oC?
Calculate the number of moles of ammonia absorbed by a boric acid solution if 3.25 ml of 0.0025 M H2SO4 were needed to titrate the solution to the end point ( Assume both hydrogens of the sulfuric a
Question: A 50.00-mL solution of 0.0350 M ammonia (Kb = 1.8 × 10-5) is titrated with a 0.0152 M solution of hydrochloric acid as the titrant. What is the pH at the equivalence point? (Kw = 1.0
How many milliliters of 0.100 mol of KOH solution are needed to completely neutralize the HCl in 300 mL of a hydrochloric acid solution that has a pH of 2.25?
Washing soda is often added to detergent formulations to make the wash water more basic. What is the formula of the NONHYDRATED form of washing soda? Does it increase or decreased the pH of the was
If the equilibrium concentrations of CO and CH3OH are 1.18 M and 1.84 M, respectively, What is the equilibrium concentration of H2?
Balance the following reaction, which occurs in acidic aqueous solution, using the smallest possible integer coefficients and adding H+ and H2O as necessary:
If gasoline's composition is estimated to be 50% octane, 25% pentane and 25% ethly benzene on a mol basis, calculate the mols of oxygen required per mol of fuel for complete combustion.
Which reactant is the limiting reactant (the reactant will be completely consumed first)? How many moles of CO2 will be produced?
You fill a 500 ml container with 100 ml of water and shut the lid. the water is at 25 degrees celcius. How many moles of water vapor will be in the "empty" 400 ml portion of the container?
36 grams of an impure zinc sample are reacted with excess hydrochloric acid and 10 L of hydrogen gas are collected at STP, what is the percentage of PURITY of zinc sample?
Why the boiling point of deuterium is higher than protium? What is the relationship between the molar mass affected their boiling point?
An equilibrium mixture of this reaction at a certain temperature was found to have [CO]=0.105M, [H2]=0.118M, and [CH3OH]=0.185M What is the value of (Kc) the equilibrium constant at this temperature?
At a Concentration of 1M, the weak acid HN0 is 2% ionized and the pH of the solution is 1.7 . What happens when KNO2(s) is dissolved into the solution: The extent of HNO2 ionization = Increases or dec
The normal boiling point of water is 100.0 degrees C and its molar enthalpy of vaporization is 40.67 kJ/mol. What is the change in entropy in entropy in the system in J/K when 39.3 grams of steam at
Use Hess' Law to show how the titration of acetic acid with sodium hydroxide can be expressed as the combination of two reactions: the acetic acid reacting with water, and the sodium hydroxide react
For the reaction A + B-----> C, the rate law is rate=k[A]. If the initial concentration of A = 2.5 mol/L, the initial [B] = 1.4 mol/L, and the rate = 0.29 moles of product per liter per minute (M
How do the units mol/L and ppm compare? You will be given a 100.5 ppm iron stock solution (the iron is ferrous ammonium sulfate hexahydrate, (NH4)2Fe(SO4)2 x 6H2O. Report its molecualr weight in g/m