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A 0.500 mole sample of an ideal gas is at a temperature of 309 K at atmospheric pressure. Calculate the volume occupied by the gas.
Calculate the wavelength (in nm) of a photon emitted by a hydrogen atom when its electron drops from the n=5 state to the n=3 state
a. what is the ph of a solution prepared by adding 20.0ml of 0.10macetic acid and 10.0ml of 0.10m sodium acetate?b.
What are the wavelengths, in nanometers, of the brightlines of the hydrogen emission spectrum
If a reaction vessel initially contains only co and NH3 at concentrations of 1.00 m and 2.00m , respectively, what will the concentration of HCONH2 be at equilibrium?
determine how many micrograms of herbicide are present in 10 lb of soil if the herbicide level in the soil in a corn
At what angle (in degrees) does first-order diffraction from layers of atoms 340.8 pm apart occur, using x rays with a wavelength of 120 pm
effuses through a hole in a plate in the same amount of time it takes 20.54 mL of another gas to effuse through the same hole under the same temperature and pressure conditions. Determine the molar mass of the unknown gas.
Calculate the pH of the solution which results from adding 38.54 mL of 0.1012 M KOH to the cyanic acid/cyanate buffer of the previous problem(*). You must show appropriate chemical equations for full credit.
What and why structural features do cyanide and thiamine have in common that makes them both capable of catalyzing the benzoin condensation
The calcium from 0.5456 g limestone sample dissolved in water was precipitated as calcium oxalate as well as ignited to calcium carbonate for weighing. The ignited precipitate weighed 0.2678g. Compute the percentage of calcium in the limestone sam..
How many grams of aluminum oxide are produced by the complete reaction of 22.4 g aluminum with excess oxygen
given that the density of a given solid and liquid of molar mass 147.2 gmolnbsp 992.6 kg m-3 and 933.4 kg m-3 . at its
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