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Why does the signal from an analytical instrument have to be converted to digital form, and how is this done? What is the minimum number of conversions that need to be done across a peak to achieve a reproducibility (relative standard deviation) of less than 1% for repeated measurements of the same peak? If you didn't have a computer or data system available, how would you measure the area of the peak? After all, someone's DUI may hinge on this measurement, and you may have to defend your calculation in court
What are the differences in the procedure that account for Sn(II) being formed in one and Sn(IV) in the other? Try to rationalize why these differences in procedure result in different products being formed
Why is acceptable to use a mixture of the alpha and beta anomers of D-(+)-mannose in this reaction? (i.e. why isn't it necessary to use either a pure alpha or the pure beta anomer? 2. What is the role of ferric chloride?
A. A student places 2.10 L of water in his dormitory room, which has the volume of 4.06 x10^4 L. He seals the room and waits for the water to evaporate. At 25 deg C, the density of water is 0.997 g/mL
Dry ice is solid carbon dioxide. A 1.87g sample of dry ice is placed in an evacuated 4.03 L vessel at 22 degrees C. Calculate the pressure inside the vessel after all the dry ice has been converted to CO2 gas
What is the boiling point of a 0.800 molal solution of sugar in water? Kb = 0.512C/m for water. Sugar does not dissociate in solution and pure water boils at 100C.
It gave a mixture of MgO and ZnO that had a mass of 1.409g. What mass of An was there in the original mixture?
A 1L flask is filled with 1.00 g of argon at 25 C . A sample of ethane vapor is added to the same flask until the total pressure is 1.20 atm. What is partial pressure of Argon and ethane in the flask?
If a buffer solution is 0.220 M in a weak acid (Ka = 8.5 × 10-5) and 0.550 M in its conjugate base, what is the pH
Assign the lines in the UV photoelectron spectrum of CO shown below and predict the appearance of the UV photoelectron spectrum of the SO molecule.
When benzoic acid reacts with sodium hydroxide, what happens to the covalent molecule
What is the radius of the cross section of a cylinder that has a volume of 644.0 m3 and a height of 12.6 m? (Volume=πr2×height)?
A biochemist wants to utilize the following oligopeptide for biochemical assays. Estimate the number of charges on this peptide at different pH conditions by considering the charge states of amino acid residues at pH 2, pH 7.4 and pH 10.
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