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A chemist is trying to come up with a new solution-based battery for use in a new car. He chooses iron and zinc as the metals for his research and .25 M concentrations for both Fe2+ and Zn2+ solutions. Will this battery be expected to work equally well in a hot summer and cold winter? why?
Calculate the entropy and Gibbs energy of mixing when the partition is removed. Assume that the gases are perfect.
What mimimum hydronium ion concentration (M) would be needed to prevent precipitation of cupric hydroxide (Cu(OH)2 Cu2+ + 2OH- , Ksp = 2.2 x 10-20) from a solution containing 0.010 M Cu2+ ion?
He was befuddled when he isolated a material with a single 1H nmr signal at 1.64 δ and 13C nmr signals at 123 δ and 18.9 δ . Use epwa to show Bonnie what happened.
A total of 0.155 of this subunit was dissolved in enough water to produce 2.00 of solution. At 28 the osmotic pressure produced by the solution was 0.138 . What is the molar mass of the protein?
Calculate the heat evolved per mole on combustion of each substance to yield {rm CO_2}(g) and {rm H_2O}(g).
An acre of corn can produce about 375 gallons of ethanol, using only the kernel of the corn for conversion to ethanol. Assume the energy input to produce an acre of corn is 15000000 kJ.
A balloon of methane gas, CH4, has a temperature of - 2.0 Degrees Celsius and contains 2.35 g of the gas. What is the temperature of the gas in kelvins
The following heats of formation are used to find the change in enthalpy for the formation of tin chloride in the following reaction Sn (s) + 2Cl2(g) --> SnCl4(l).
A particular calorimeter is calibrated and is found to have a calorimeter constant, Ccal = 3.640 kJ/°C. When 1.500 g of an unknown hydrocarbon was combusted in the calorimeter
How many grams of CaH2 (Molar Mass = 42.1 g/mol)are needed to generate 10.0 L of H2 gas if the pressure of H2 is 769 torr at 28.0°C?
an aluminum rod at 55.0 degrees celsius is put into 399 grams of water at an initial temperature of 20.0 degrees celsius. If the final temperature of water and rod are 30.0 degrees celsius, what was the mass of the aluminum rod?
The Kp for the reaction is 4.3X10^-4 at 648K. Determine the equilibrium partial pressure of NH3 in a reaction vessel that initially contained 0.900atm N2 and 0.500 atm H2 at 648K.
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