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Olive oil is completely burned in oxygen at 100.3oC according to: C57H104O6(l) + 80O2(g) ? 57CO2(g) + 52H2O(g) ?Hrxn = -31150 kJ Calculate the change in the internal energy ?E "?U" (in kJ) for this combustion process. A) -31025 B) -31060 C) -31078 D) -31240
A variation of this experiment uses a balloon as the container for the carbon dioxide. Describe any additional measurements that you must make in order to find the molar mass by this method.
How many gms of H2O must be combined to 519.5 gms of methanol at 20°C to have an osmotic pressure of 408 mm of Hg? Methanol density = 0.8921 g/mL.
When 0.100 mol of toluene(C7H8(l)) is burned in this calorimeter, the temperature is raised by 0.615C. The equation for the combustion reaction is
If 0.7438 g of potassium hydrogen phthalate is used and the equivalence point occurs at 33.00 mL of NaOH, calculate the molarity of the NaOH solution to the correct number of significant figures.
Using the values from appendix C in the text calculate the Entropy and Enthalpy changes for the decomposition of ammonia into nitrogen and hydrogen at 298K and 1.0atm. Then determine the temperature at which the gases are in equilibrium with each ..
molal solution of NaCl is prepared. How many grams of NaCl are present in a sample containing
A flask contains 0.500 mol of liquid bromine, rm Br_2. Determine the number of bromine molecules present in the flask.
Solid Lithium hydride is added to water. Find the complete molecular, complete ionic, and net ionic formulas.
Ethane is burned with 20% excess air in a furnace operating at a pressure of 100 kPa. Assume complete combustion occurs.
The amino acid histidine has three pKa's at 1.8, 6.0 and 9.3. In a 0.01 M solution of histidine, what is the concentration of protonated carboxylic acid at pH 7.4? The primary amine? The side chain?
when atoms lose more than one electron, the ionization energy to remove the second electron is always more than the ionization energy to remove the first.
For detection using Fluozin-3, what is the excitation wavelength that should be used. For Zincon detection of zinc and copper, what pH range agent do, and why would it be useful for metal detection
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