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A mixture of Fe^3+ and SCN^- was allowed to come to equilibrium with FeSCN^2+. The concentrations of each were then determined as follows: [Fe^3+]= 6.8 x 10 ^-4 M, [SCN ^-]= 3.3 x 10 ^-4 M, [FeSCN ^2+]= 3.0 X 10 ^-5 M. Determine the equilibrium constant for this reaction.
What is the major role of a greenhouse gas that contributes to temperature rise of the Earth's surface? 1 Stops both incoming sunlight and outgoing infrared radiation
A sample of nitrogen gas in a 4.6-L container at a temperature of 30.°C exerts a pressure of 3.9 atm. Calculate the number of moles of gas in the sample.
In which of the following would the bonding be weakened with the addition of an electron to form the negative molecular ion?
If 1.19 mL of a 1.4 x 10-5 M stock solution is pipette into a test tube, and 8.81 mL of water is added to the test tube and mixed, what is the concentration of the new solution in the test tube?
Explain why the pKa of benzoic acid (pKa = 4.2) is significantly lower than the pKa of propanoic acid (pKa = 4.9). Select the single best answer.
A first order reaction has a rate constant of 0.342 sec-^1 at 29.5 degrees C. If the activation energy is 69 kJ, calculate the temperature in degrees C at which the rate constant is 0.428 sec^-1.
A metal object with a mass of 19 g is heated to 96 degree celcious, then transferred to a calorimeter containing 75 g of water at 18 degree celcious
One metric ton (1000 kg) of coal is required to produce 7.3 MW-hr of electrical energy. In 1993, the Thomas Hill power plant (a small, coal-fired plant supplying rural electric cooperatives) produced 7100000.0 MW-hr.
The molal freezing point constant for water is 1.86 C/m. At what temperature will a mixture of 2.00 g of CaCl2(MM: 110.98g/mol) and 25.00 g of water freeze
Laboratory-grade diethyl ether contains small amounts of ethanol (1-2%). Is this grade of solvent suitable for the preparation
there are two natuarlly occuring isotopes of rubidum. (85)Rb has a mass of84.9118 amu. (87)Rb has a mass of 86.9092 amu. Determine the abundance of each isotpe.
What is the isotropic difference (in per mil) at 25 degrees between gas, liquid, and solid phase for the elements carbon and sulfur? Show calculations
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