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Sodium Borohydride Reduction of Benzophenone start with 0.5g of benzophenone and finished with 1.2g what the percent of yield
An environmental chemist needs a carbonate buffer of pH 10.00 to study the effects of acid rain on limestonerich soils. How many grams of Na2CO3 must she add to 1.5 L of freshly prepared 0.20 M NaHCO3 to make the buffer? KA of HCO3- is 4.7 x 10-1..
Problem concern protein molecules embedded within the membrane of a spherical vesicl
Explain what is the stoichiometry between the acid and the base. If .4728g KHP requires 22.86mL of NaOH to reach the phenolphthalein pink end point what is the molarity of the NaOH. Molar Mass of KHP is 204.22 g/mol.
Given tyrpsin digest yields the following amino acid sequences: k, tyk, wag, and spwr and a chymotyrpsin digest yields ag, rw, ty, and kkspw. what is the primary amino acid sequence of the antibiotic peptide
why are london dispersion forces of the sample molecules strongly influencing gc measurements? and why are they usually
An unknown gas Q effuses 1.33 times as fast under the same conditions as Xe gas. What is the molar mass (g/mol) of Q
Blood has a density of 1060 kg / m3. Circulating all of the blood in the body through the heart takes about one min for a person at rest. (a) Explain how much blood is in the body
The expresssion for the freezing point depression of a solution relative to that of the pure solute is shown above. From solutions of known concentrations of p-dichlorobenzene in cyclohexane, you determine Kf, the freezing point depression constan..
A cylinder is separated into two sections Y and Z by an insulating frictionless piston and sealed at both ends. Each section has two moles of an ideal gas.
A typical frostless refrigerator uses 655 kWh of energy per year in the form of electricity. Suppose that all of this electricity is generated at a power plant that burns coal containing 3.0% sulfur by mass
The normal range for the carbonyl group of a carboxylic acid in the IR spectrum is 1725 - 1700 cm-1. Why is the carbonyl group of benzoic acid appear at 1696 cm-1
in a chemcial analysis of a chromium alloy all of the chromium is first converted to chromate ions. a 50ml sample of
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