Calculate the work in units of kj for the gas expansion
A sample of an ideal gas at 15.0 atm and 10.0 L is allowed to expand against a constant external pressure of 2.00 atm at a constant temperature. Calculate the work in units of kJ for the gas expansion.
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Calculate the minimum volume in cm3 of a pure methanol fuel tank required to run a soldier's uniform for 3 days. The nominal power is 20W. There are 10 cells in the stack in series, and the total stack moltage is 5v.
How many milliliters of concentrated sulfuric acid of specific gravity 1.84 and containing 98% H2SO4 by weight should be used to make 1 liter of one normal (1 N) solution?
After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 18.7693 g. Assum- ing that only the magnesium carbonate had decomposed, how much magnesium carbon- ate was present in the original sam
When a 0.6333-g sample of a compound of carbon, hydrogen and sulfur was burned in excess oxygen, 0.9272 g CO2, 0.3795 g H2O and 0.6749 g SO2 were obtained.
A student designs an ammeter (a device that measures electricalcurrent) that is based on the electrolysis of water into hydrogenand oxygen gases.
Calculate the pH of a solution made from mixing 25.0 mL of 2.00 MHCl with 20.0 mL of 1.75 M Ca (OH)2. Giving thatCalcium Chloride is a neutral salt.
The titration data obtained will be used to calculate the value for the equilibrium constant for the dissolution of borax inwater, the value for the equilibrium constant change as the temperature changes, and the values for ΔHo, ΔSo, a
Methylamine CH3NH2, has a base dissociation constant of 3.7 x10-4. What is the conjugate acid of methlamine and what is its acid dissociation constant?
A hydrogen atom initially in the n=7 quantum state emits a photon having a wavelength of 2.16495E-6 m. What is the quantum number of the final state of the atom?
When molecules are represented by molecularmodels, what does each sphere represent? How big is the nucleus of an atom in comparison to the sphere used to represent an atom in amolecular model?
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