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The heat of fusion of water is 6.008x10^3 J/mol at its normal melting point of 272.15K. Calculate the freezing point depression constant Kf.
A diprotic acid, H2A, has the following ionization constants: Ka1 = 1.1 multiplied by 10-3 and Ka2 = 2.5 multiplied by 10-6. In order to make up a buffer solution of pH 5.80, which combination would you choose, NaHA/H2A or Na2A/NaHA? What is the p..
An aqueous solution containing 21.6 mg of vasopressin in 100.0 mL of solution has an osmotic pressure at 25.0 oC of 3.70 mmHg. What is the molecular weight of the hormone?
The combustion of heptane with oxygen is a well known process. Write a balanced equation for the reaction of heptane, C7H16, with oxygen, O2, forming the products carbon dioxide, CO2, and water, H2O. What mass of water will be produced by the comp..
Calculate the pH and pOH of each of the following solutions. [H3O+] = 1.5x10^-8 M? [H3O+] = 1.0x10^-7 M? [H3O+] = 2.2x10^-6 M
A mixture of two miscible solvents that may be used as the solvent for a recrystallization experiment would be which of the following
Zinc is reacted with hydrocloric acid to make hydrogen gas and zinc chloride. when 42.86 g of zinc is added to 40.11g of hydrochloric acid, 63.22g of zinc chloride were collected.
in the final step of the purification process in the miniscale procedure for preparing 1-bromobutane from sodium
Assuming that the volume of a solid or liquid was independent of the external pressure, we deduced that there was no change in the Gibbs free energy of a solid or liquid when the pressure is changed.
Which of the following observations is the strongest argument that in favor of the hypothesis that protein structure and function are related?
When aluminum is produced by electrolysis we get 5.68 tons of aluminum and 5.04 tons of oxygen. What is the empirical formula of the compound that is being electrolyzed
with vapor pressures at room temperature of 88, 680, 155, respectively, in order of decreasing boiling points.
At a certain concentration of reactants the rate of appearance of water in the following reaction is 0.43 M/s.
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