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What are the concentrations of HOAC and OAC- in a 0.2M acetate buffer pH 5.0? The Ka for acetic acid is 1.70 X 10-5 (pKa = 4.77).
When the optically active compound V (c5h11br) is heated with an ethanolic solution of potassium hydroxide, the major product is the alkene W and the minor product is another alkene, X.
Inspection of an IR spectrum rarely reveals the identity of the compound. However, one can often identify what?
Describe the preparation of 3 liters of a .2 m na-acetate buffer, ph 5.0, starting from solid sodium acetate trihydrate (mw 130) and a 1 M solution of acetic acid.
The rate at which a compound travels through a particular GC system depends on numerous factors. List the five factors and number them one through five.
The emitted wavelengths of an element can be related to the frequency and energy of emission. The emissions from the hydrogen atom were modeled using the Rydberg equation, which Niels Bohr used to d
Research in surface science is carried out using ultra?high vacuum chambers that can sustain pressures as low as 10?12 torr. How many molecules are there in 1.00 cm3 volume inside such an apparatus
The atomic mass of element X is 33.42 amu. A 15.05-g sample of X combines with 79.32 g of another element Y to form a compound XY. Calculate the atomic mass of Y.
if temperature and pressure remain constant, how does the volume of a gas sample vary with the number of moles of gas present
what would be the effect on the results of mistakenly adding 2.43 times 10^-3 g Mg to 4.0 mL of 0.1M hcl rather than to 4.0 mL of 1.0M hcl as instructed
The secondary bonding of gas molecules to a solid surface is a common mechanism for measuring the surface area of porous materials, by lowering the temperature of a solid well below room temperature
A casting of an alloy in the form of a disc weighed 50 g. The disc was 0.25 inches thick and had a circular cross section of diameter on 1.380 inches. What is the density of the alloy
Are these mass or mole percents? About how many pounds and pound-moles of each element is carried around in a 155 pound person
Discuss the value that non-executive board members bring to an organization. Provide specific examples to support your response.
The Ka for a weak acid, HA is 1.6 x 10^6. What are the pH and degree of ionization of the acid in a 10^-3 M solution. Calculate the pKa and pKb.
The human body contains 63% H, 25.5% O, 9.45% C, 1.35% N, 0.31% Ca, and 0.22% P, plus several elements present in smaller quantities. Are these mass or mole percents
If we assume that the volume change is due entirely to the density change (that is, neglect thermal expansion of the ice/water), what is the difference between the enthalpy change and the energy cha
Diagram the most accurate procedure so you end up with at least 500 uL each of 5 ug/uL, 0.5 ug/uL and 0.05 ug/uL working solutions of BSA.
One of my pre-lab questions asks me to add one of two steps to the beginning of the mechanism for the reaction of benzopinacol with I2/HOAc to benzopinacolone to show the function of I2 in this rear
Provide a structure for the following compound: EI mass spectrum: two molecular ions of about equal intensity at m/z = 180 and 182; IR: 1740 cm-1; 1H NMR: ? 1.30 (3H, t J = 7 Hz); ? 1.80 (3H, d, J =
This entire mixture is then diluted to 1 liter with water. What is the final concentration of phosphoric acid
Provide a structure for the following compound: molecular mass 101; IR: 3397, 3200, 1655, 1622 cm-1; 13C NMR: ? 27.5, ? 38.0 (weak), ? 180.5 (weak).
Can someone continue on what I already have please. Water cannot be used as a solvent for the Diels-Alder reaction between maleic anhydride and 1,3-cyclopentadiene because
pressure cookers achieve a high cooking temperature to speed the cooking process by heating a small amount of water under constant pressure
How many liters of CH4 (g), measured at 23.4C and 768mmHG, must be burned to provide the heat needed to vaporize 3.78 L of water at 100C? DeltaHcomb= -8.90x10^2 KJ mol CH4. For H2)(l) at 100 C, d= 0