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Classify the following as exothermic or endothermic reactions: a) The energy level of products is lower than that of the reactant. b) In the body, the synthesis of proteins requires energy. c) 125kJ is absorbed.
A voltaic cell is constructed from an Ni^2+(aq)-Ni(s) half-cell and an Ag^+(aq)-Ag(s) half-cell. The initial concentration of Ni^2+(aq) in the Ni^2+-Ni half cell is [Ni^2+] = 1.1*10^-2M.
The tank is first evacuated, and then it is connected to a 50.0 L cylinder of compressed nitrogen gas. The gas pressure in the cylinder, originally at 21.5 atm, falls to 1.55 atm without a change in temperature. What is the volume of the tank?
Calculate the mass of silver chloride required to plate 135 mg of pure silver. Silver chloride, often used in silver plating, contains 75.27% Ag.
Imagine you want to determine the binding constant for a reaction. You know you will need to generate data to calculate the binding constant.
If the total mass of CO2 produced is 33.5 grams, what was the approximate mass of the methane in the original mixture?
If the pressure of a gas is 39.18 atm in a piston, what is the final pressure, in atm, if the volume of the piston is multiplied by 4 at a constant temperature?
What is the maximum number of electrons that can be identified with each of the following sets of quantum numbers? In some cases, the answer may be "none."
mole of naphthalene(C10H8), a solid, is burned in a constant- volume bomb calorimeter at 298K, 5150 kJ of heat is evolved. Calculate delta H for the raction on a molar basis.
2-bromooctane in 10 mL ether solution gave an observed rotation of -1.8° in a 10 cm cell at 20°C. Calculate the specific rotation of this solution.
400 ml of .50 M HNO3 is added to 200 ml of water. if 100% dissociation occurs, find the resulting pH.
At constant volume, the heat of combustion of a particular compound is -3698.0 KJ/mol. When 1.895 g of this compound (molar mass=181.06 g/mol) was burned in a bomb calorimeter
at 580 nm, the wavelength of its maximum absorption, the complex Fe(SCN)2+ has a molar absorptivity of 7.00 x 10^3 L mol -1cm1-. Calculate
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