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What is the acid-ionization constant, Ka, for the ionization of acetic acid, shown in the reaction CH3COOH(aq) + H2O(l) mc029-1.jpg H3O+(aq) + CH3COOH-(aq)?
A reaction vessel contains these compounds at equilibrium. What will happen of the volume of the container is reduced by 50% at constant temperature
What is the pressure in torrs of the volume of a sample of a gas is 7.6 liters when 0.46 moles of gas are at 54 degrees celsius?
15.14 mL of standardized Na2S2O3 was required to reach the endpoint. How many moles of IO3- were present in your samples?
How many grams of methane [CH49g] must be combusted to heat 1.00 kg of water from 24.0 to 93.0, assuming H2O(l) as a product and 100% efficiency in heat transfer?
How much of the other reagent is left over after the reaction is complete?
The reaction system POCL3(g) POCL(g)+CL2(g) is at equilibrium. which of the following statements describes the behavior of the system if the partial pressure of chlorine is reduced by 50%?
Consider the following equation that describes the complete combustion of propane. The bond energies are: C-H 416 kJ/mol; C-C 356 kJ/mol; O=O 498 kJ/mol; C=O 803 kJ/mol; H-O 467 kJ/mol.
one mole of methane has a mass of 16.0 grams. How many grams of methane are needed to make 1.0 L of a 0.20 molar solution?
A silver chloride precipitate weighing 0.2255 grams was obtained from 0.3448 grams of a soluble salt mixture. Calculate the percentage of chloride in the original sample.
The volume of the mixture is 1.7 L, and its total pressure is 0.998 atm. Determine the partial pressure of the hydrogen gas in this mixture
Consider 4.40L of a gas at 365 mm Hg and 20 degrees celcius. Express the pressure numerically in millimeters of mercury.
What volume would a 0.0236-mole sample of helium gas would occupy at a temperature of 24°C and a pressure of 0.750 atm?
A nugget of gold with a mass of 521g is added to 50.0mL of water. The water level rises to a volume of 77.0mL. What is the density of the gold?
The epiglottis and the vocal cords then shut, trapping the air in the lungs, where it is warmed to 37 ^circ rm C and compressed to a volume of about 1.70 rm L by the action of the diaphragm and ches
A cup of hot, steaming coffee sits on the desk at 80 degrees Celsius and is composed of mostly water with some things dissolved in it. the air in the room is 20 degrees Celsius and has gaseous water
Chlorine gas can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid. How much MnO2 should be reacted with excess HCl to obtain 275 mL of chlorine gas at 5.0 °
A quantity of 2.0 * 10^2 mL of 0.862 M HCL is mixed with 2.00 * 10^2 mL of 0.431 M Ba(OH)2. How many moles of water are produced in the reaction?
A student wants to dissolve the maximum amount of CaF2 (Ksp = 3.2 * 10^-11 ) to make 1 Liter of aqueous solution. a) Into which of the following solvents should she dissolve the salt ?
The density of liquid water at 0 degrees celsius is 0.9987 grams per centimeter cubed; the density of ice at the same temperature is 0.917 grams per centimeter cubed. calculate the volume of both a
If the temperaure changes from 22.0oC to 275oC and the specific heat of aluminum is .900 J/goC, how much energy, in J, was required?
What is the pressure exerted onto the closed end of an apparatus if the atmospheric pressure is 720 torr and the height of the water is 22.3 cm?
A certain first-order reaction (A->products) has a rate constant of 6.60×10-3 s^-1 at 45 C. How many minutes does it take for the concentration of the reactant, [A] , to drop to 6.25 % of
Find the heat of combustion in kJ/g for each gas. These values are valid at 25°C, where the water produced by the reaction is in the liquid state.
The partition coefficient between ligroin and water for solute A is 4. What weight of A would be removed from a solution of 12 g of A in 100 mL of water by a single extraction with 100 mL of ligroin?