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sodium chloride is 58.44 g/molKbwater = 0.51 oC/m, Kfwater = 1.86 oC/m25.Calculate ΔSuniverseand say if the process is spontaneous, nonspontaneous, or at equilibrium at 27oC. Use the data below: ΔHofCH3CH2OH (l) = -257.5 KJ/mol, CH3CH2OH (g) = -235.1 KJ/molSoCH3CH2OH (l) = 150.5 J/mol-K, CH3CH2OH (g) = 272.7 J/mol-KCH3CH2OH (g) CH3CH2OH (l)
26.What product is formed when radium-226 undergoes alpha decay?27.Write nuclear equations for (a) mercury-201 undergoing electron capture; (b) thorium-231 decaying to proctactinium-231.28.The half-life of cobalt is 5.3 yr. How much of a 1.000-mg sample of cobalt-60 is left after 15.9 years? 29.A rock contains 0.257 mg of lead-206 for every milligram of uranium-238. The half-life for the decay of uranium-238 to lead-206 is 4.5x109. How old is the rock?