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What is the composition of the vapor of a pentane-hexane solution that has a vapor pressure of 357 Torr at 25C vapor pressures at 25 C= pure pentane is equal to 511 torr, pure hexane equals 150 torr. What is the pentane mole fraction in the vapor and also what is the hexane mole fraction in the vapor?
How many milliliters of a 120 mL solution of 1.51 M BaCl2 must be used to make 16 mL of a solution that has a concentration of 0.3 M Cl-?
For the strong base solution 4.0×10?3 M Ca(OH)_2, determine [OH^-], [H_3O^+], pH, and pOH.
Naturally occuring iodine is iodine-127. medically, radioactive isotopes of iodine-125 and iodine-130 are used. a)write the atomic symbol for each isotope. b)in what ways are the isotopes similar, and in what ways do they differ
Calculate the total concentration of lead for a system containing a fixed concentration (0.01 M) of KI. Note (s) denotes solid and (aq) denotes aqueous
A 1.07 g sample of sulfur was burned in a bomb calorimeter whose calorimeter constant is 2.03 kcal/°C. If the resulting temperature change was 1.17 °C, what is the molar heat of combustion for sulfur in kcal/mole
For the following electrochemical cell Cu(s)|Cu2 (aq, 0.0155 M)||Ag (aq, 1.50 M)|Ag(s) write the net cell equation. phases are optional. do not include the concentrations
sulfur dioxide is an unwelcome result of burning soft coal in power plants. Some of the sulfur dioxide ends up as sulfuric acid ( H2SO4) in acid rain.
A volume of 40.0 ml of aqueous potassium hydroxide was titrated against a standard solution of sulfuric acid. What was the molarity of the solution if 13.2ml of 1.50 M was needed
A galvanic cell has an iron electrode in contact with 0.11 M FeSO4 and a copper electrode in contact with a CuSO4 solution.
If a mixture of gases contained 78% nitrogen at a pressure of and 22% carbon dioxide at 345 torr, what is the total pressure of the system?
For the hypothetical first order reaction A yields products, k= 0.0206 s-1. if the initial concentration of A is 0.165 M, how long would it take for A to be 88.7% consumed
A certain first-order reaction has a rate constant of 1.00x10-3 s-1. How long will it take for the reactant concentration to drop to 1/8 of its initial value?
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