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Calculate the change internal energy (?E) for a system that is giving off 45.0 kJ of heat and is performing 855 J of work on the surroundings.
A. 9.00 x 102 kJ
B. -9.00 x 102 kJ
C. -44.1 kJ
D. -45.9 kJ
E. 44.1 kJ
calculate the heat in joules released by the dissolving salt. Assume that the specific heat of the solution is the same as thar of pure water(4.184J/g- celcius) and that the calorimeter is perfect.
How are fatty acids transported into the mitochondria for breakdown? Which precursor for fatty acid synthesis blocks this transport pathway, and how is that important for the regulation of fatty acid metabolism?
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You have a sample that consists of 8.2 (+ or -)o.1mL of aqueous 239Pu solution. You measure two 10mL aliquots by liquid scintillation counting and get 3211.4 cpm and 3315.2 cpm, respectively.
Write the structure for the quinoxaline derivative obtained when benzil is the reactant. Do you think this compound would be coloured? If so, why?
In proteins, the amino acid histidine (His) plays an important role in many biological reactions. The pKa for the protonation of His to form HisH
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