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A weaken solution in water has an osmotic pressure of 12.2 atm at 20oC relative to pure water. Approximate the mole fraction of water in the solution also the difference in chemical potential between pure water and the solution. Take as a basis 1 L of solution as well as assume its density is the same as pure water.
A dioxin-contaminated water source contains 0.081% dioxin by mass. How much dioxin is present in 4.2 L of this water? (Assume that the density of the solution is 1.01 g/mL.)
What volume of hydrogen gas is produced when 83.8 g of iron reacts completely according to the following reaction at 25oC and 1 atm.
The average C--H bond energy is 415 kJ/mol. Use the following data to calculate the average C--H bond energy in ethane (C2H6; C--C bond), in ethene (C2H4; C=C bond), and in ethyne (C2H2; C--C triple bond).
Calculate the standard entropy change for the reaction 2Na(s) + Cl2 (g) --> 2NaCl (s) using the data from the following table: Substance Change in h Change in G S degrees 0.00 0.00 51.30 0.00 0.00 223.1 -411.0 -384.0 72.10
explain why only a catalytic amount of the radical initiator is required in a free radical-chain polymerization reaction
Outline the mechanism of the reaction of acetyl chloride with NaN3 to give acetyl azide. This reaction is known as Nucleophilic Acyl Substitution.
Write a line angle formula of each constitutional isomer of dimethylcyclohexane. Write the IUPAC name of each isomer.
Calculate the standard molar enthalpy of formation ?H°f of N2H4(g) from the following information: N2(g) + 2H2(g) ? N2H4(l) ?H°rxn = +50.6 kJ N2H4(g) ? N2H4(l) ?H°rxn = -44.8 kJ A. +5.8 kJ/mol B. +95.4 kJ/mol C. +47.7 kJ/mol D. -95.4 kJ/mol E. -5...
When 0.156 mol of urea, nonelectrolyte whose MM=60.1 and whose density=1.48g/cm3,is dissolved in 131g of water, the molality of the solution is
A gaseous mixture of O2 and N2 contains 38.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 365mmHg
A chemist found that a certain amount of a CFC gas required 186 seconds to effuse through a porous plug when the pressure was held constant.
Calculate the pH of each of the following solutions ( Ka and Kb values are given in Appendix D in the textbook). 0.115 M hydrogen chromate ion (HCrO4^-)
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