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Explain what is the wavelength of light emitted when an excited electron in hydrogen atom falls from the n=5 level to n=2? use nanometers
what tecnhique is used to separate the active ingredient from each of these compounds citric acid sodium benzoate
Cs in the metal with a bcc structure is 272 pm, calculate the expected atomic radius of the Cs atom with a coordination number of 12.
Single displacement, double displacement, and decomposition reactions may all be redox reactions. Identify the type of redox reactions
the I2 sublimes and gasses iodine heptofluride forms 3.2x10^2 torr of T2 and 4.1 g of solid I2 are put in to a 2.5 L Container at 2.5x10^2 K and container is heated to 5.5 x 10^2 K A what is the final pressure in atms. what is the partial pressure..
the working substance of an engine is 1.00 mol of a diatomic ideal gas. the engine operates in a cycle consisting of
When the reddish brown mercury (II) oxide (HgO) is heated, it decomposes to its elements, liquid mercury metal metal and oxygen gas. If 4.29 grams HgO is decomposed to Hg, calculate the mass of the pure Hg metal produced
Consider the pH range for the following indicators and select the most appropriate indicator for the titration of an HCN solution with a NaOH titrant.
Determine the specific heat of a material if a 38 g sample of the material absorbs 40. J as it is heated from 298 K to 313 K?
Substances A2, B2, and C2 can act as oxidizing agents. Solution A2 is green, B2 is yellow, and C2 is red. In the reactions in which they participated they are reduced to A-, B-, and C- ion, all of which are colorless
Molecules can be as small as a few atoms or as large as thousands of atoms. In 1962, Max F. Perutz and John C. Kendrew were awarded the Nobel Prize for their discovery of the structure of hemoglobin
a list the products ofthe reaction if equimolar amounts of aqueous solutions of feno33and nancs are mixed.b write the
Occupies 6.0 cubic meters at a pressure of 1.5 atm. The pressure is then expanded to 2.0 atm. The temperature remaining constant, what is the new volume of the gas?
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