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How many isomers, including stereoisomers, exist for the triacylglercerol which, on saponification, gives 2 molar equivalents of palmitate and 1 molar equivalent of stearate?
a) 1
b) 2
c) 3
d) 4
e) 6
Calculate the quantity, in grams, of formic acid and sodium formate necessary to make 500. mL of a buffer that has a formic acid concentration of 0.75 M and a sodium formate concentration of 0.75 M.
Hexane has a density of 0.659g/mL to the third at 20 degrees C. How many mL are needed to have 30.0g of liquid.
Describe two different ways by which electrons can move from the valence band to the conduction band.
When sodium sulfate, Na2(SO4), is dissolved in water, the temperature goes down. How would you describe the energetics of this process?
What compounds react with the diazonium salt to give the phenolic product? Why should an excess of nitrogen be avoided in this reaction?
If atmospheric pressure suddenly changes from 1.00 atm to 0.898 atm at 298 K, how much oxygen will be released from 3.10 L of water in an unsealed container?
A certain first-order reaction () has a rate constant of 6.90×10-3 at 45 . How many minutes does it take for the concentration of the reactant, , to drop to 6.25 of the original concentration?
A chemical reaction takes place in a container of cross-sectional area 100 cm2. As a result of the reaction, a piston is pushed out through 21 cm against an external pressure of 534 torr.
The work function of an element is the energy required to remove an electron from the surface of the solid element. The work function for lithium is 279.7 kJ/mol.
the addition of bromine to an equimolar mixture of cis- and trans-2-butene generates only three stereoisomers. Explain.
The vapor pressure of carbon tetrachloride, , is 0.354 atm and the vapor pressure of chloroform, is 0.526 atm at 316K . A solution is prepared from equal masses of these two compounds at this temperature.
What are the percentages of each molecular ion? (List to nearest 1% in order of increasing mass separated by commas, e.g. 55,45.)
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