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one mole of an ideal gas (Cp=7R/2) in a closed piston cylinder is compressed from initial state of temperature =100 K pressure = 0.1 MPa to final state of pressure =0.25 MPa by the following pathways. for each pathway calculate dU, dH, Q, W(ec): (a) isothemal (b) constant volume (c) adiabatic
Determine how much heat is evolved or absorbed when 25.0 of lithium iodide completely dissolves in water. Lithium iodide has a lattice energy of -7.3 X 10^2 kJ/mol and a heat of hydration of -793 kJ/mol.
A hydrated compound contains 1 mole of cation M, 3 mole of anion A, and 2 moles of water. The correct formula is
Calculate the number of grams of H2 formed If the wet Hydrogen gas formed occupies a volume of 9.67 Litres
the electron in the n 5 level of a hydrogen atom emits a photon with a wavelength of 1280 nm. to what energy level
how to draw mechanisms for organic chemistry? Would really like to learn how to draw them.
Calculate the solubility product (Ksp) for barium fluoride if the concentration of the barium ion is 3.6 x 10-3 M and of the fluoride ion is 7.2 x 10-3 M.
A buffer solution is .200 M in HNO2 and .185 M in NaNO2. What is the pH of the buffer system after 50 ml of .100 HCl is added to 250 ml of the buffer solution?? Ka of HNO2 = 4.6*10^4. (please show all work)
Consider that there are two sources of OH-in this procedure. Also, an excess of 3 mL will need to be added to your calculated value in order to suppress the hydrolysis of Al 3+.
How many grams of chromium would be electroplated by passing a constant current of 5.2 amperes through a solution containing chromium(III) sulfate for 45.0 minutes.
What velocity must an electron have in order to have a de Broglie wavelength of 1.00 A? What velocity must a proton have in order to have the same de Broglie wavelength
What is the pressure inside a system when the system-side column in an open mercury manometer is 75.0 mm lower than the atmosphere side when the atmospheric pressure is 735 mm Hg?
A thin piece of semiconducting silicon will be used to fabricate an electrical device. This layer is 0.10 cm thick and cut into a strip 0.50 cm wide by 1.50 cm long. Electrical contacts are placed at opposite ends of its length.
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