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1]in a tripeptide of Asp-Asp-Asp, would you predict that the pKa of the middle Asparate to be lower, higher or unchanged? 2]In a tripeptide of Lys-Glu-Arg, would you predict that the pKa of the middle Asparate to be lower, higher, or unchanged?
A gas evolved during the fermentation of sugar was collected at 22.5°C and 702 mmHg. After purification its volume was found to be 25.0 L. How many moles of gas were collected?
Given the following equilibrium constant at 25 C, calculate the equilibrium constant for the unknown reaction below.
If a 2.5 L reaction vessel initially contains 725 torr of cyclopropane at 485C , how long will it take for the partial pressure of cylclopropane to drop to below 105 torr?
what is the theoretical yield of PbI2 in grams? g) if the student obtained .583 grams of PbI2 product after collecting it by filtration and drying it, what was the percent yield of PbI2 obtained?
A solid sample weighing 0.2736 g of ethylammonium chloride appreciably contaminated with ammonium chloride (but no other contaminants) required 34.20 mL of 0.08177 M NaOH for complete titration. Find the weight percent of each component in the mix..
Calculate the mass of water vapor produced when 6.00 L of propane (C3H8) gas undergo complete combustion at a temperature of 250C and a pressure of 1.00 atm.
Calculate the heats of combustion for the following reactions from the standard enthalpies of formation listed in Appendix 3. (?H°f (HgO(s)) = -90.7 kJ/mol and ?H°f (FeO(s)) = -272 kJ/mol.)
Important information about Heat and temperature, What is Heat? What is temperature? What are the various properties that account for temperature?
A large gas flask is found to weigh 143.567 g. it is then filled with gas to a pressure of 735 torr at 31 C and found to weigh 1067.9 g.
15g of steam at 373 K is added to 250g of H2O at 298 K at constant pressure of 1 bar. Is the final state of the system steam or liquid water? Calculate changes in entropy for the process.
How much heat energy, in kilojoules, is required to convert 73.0 g of ice at -18.0 0C to water at 25.0 0C ?
a half-life for the disappearance of dinitrogen pentoxide of 5130 s. Suppose 0.450 atm of N2O5 is introducted into an evacuated 2.00 L flask. What will be the total gas pressure inside the flask after 3.00 hours
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