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How does SEC distinguish between large and small molecular weights? Be specific here. Also why is SEC ideally suited for polymer analysis?
consider the following unbalanced equationca3po42 h2so4 ---gt caso4 h3po4what masses of calcium sulfate and
Describe in detail a way of preparing 500 ml of solution that is 0.02500 M in sodium ions. Start with solid sodium sulfate decahydrate.
What was the molar solubility of CaCO3 in this solution (Kb1(CO32-) = 1.8 × 10-4)
The change in the Gibbs energy of a certain constant-pressure process as a function of temperature was found to fit the expression ?G (J K-1)=-73.1 J +42.8T. Calculate the value of S for the process.
they condense and then revaporize. During which of these steps is the concentration of the more volatile compound of the mixture increased?
in a coffee-cup calorimeter 1.60 g of nh4no3 is mixed with 78.0 g of water at an initial temperature of 25.00degc.
Draw the structures of the two carbocation intermediates that might form during the reaction of the alkene (below) with HCl. If the two carbocations differ in stability, draw a reaction arrow from the less stable to the more stable.
Explain why when the thermodynamic reaction is added to water , the reaction is more vigorous than when the kinetic product is added to water.
Calculate the pH of the solution that results when 20 ml of 0.100 M CH3COOH is mixed with 10.00 mL 0.200 M NaOH
Assume that while extracting material from gallstones you have isolated a compound that you suspect is cholesterol, but you cannot be sure. How would you experimentally prove that the sample that you have isolated is actually cholesterol using mel..
silver has two stable isotopes with masses of 106.90509 amu and 108.9047 amu. the average molar mass of silver is
when silver ions are added to the red fescn2 ions the red solution disappeared and a white precipitate of agscn formed.
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