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A highly excited atom of hydrogen makes a transition from the n = 9 to the n = 8 state and emits a photon. What is the energy of this photon in joules? What is the wavelength in meters of the photon emitted when this highly excited hydrogen atom of hydrogen makes its transition from the n = 9 to the n = 8 state?
How much heat is evolved when 243 g of ammonia gas condenses to a liquid at its boiling point?
Concentrated ethanol solutions can be used to kill microorganisms. At low concentrations, however, such as in some wines, the microorganisms can survive and cause oxidation of the alcohol. What is the structure of the acid formed
What is the volume of NH3 produced in the following reaction when 3.0 L of N2 reacts with 4.0 L of H2? N2 (g) + 3H2 (g) -> 2NH3(g)
determine the amount of heat energy needed to convert 255g of substance x from 40 degrees to 300 degrees
Calculate the concentrations of all species in a 0.370 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid
Concentrated hydrochloric acid is 38% HCl by weight and has a density of 1.19 g/mL. A solution is prepared by measuring 25 mL of the concentrated HCl,
What is the pH of the solution after 50.0 mL of base has been added? What is the pH of the solution at the equivalence point
Various types of medicines use in daily life? and classify them into analgesics, antipyretics, antibiotics, sedatives, antiseptics.
How many grams of sodium azide are needed to provide sufficient nitrogen gas to fill a 35.0 by 35.0 by 25.0 cm bag to a pressure
At high temperatures phosgene (COCl2) decomposes to give carbon monoxide CO and Cl2. In a typical experiment, 0.631 g of COCl2 is injected into a flask of volume 472 cc.
What is the equivalence volume, Ve, in milliliters? Calculate the concentration of Ca2 at V = 1/2 Ve?
Calculate the change in molar enthalpy and molar internal energy when carbon dioxide is heated from 15 degrees Celsius to 37 degrees Celsius
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