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The absorption spectra of ions have been used to identify the presence of the elements in the atmospheres of the sun and other stars. What is the wavelength of light (in nm) that is absorbed by He+ ions, when an electron is excited from the Bohr orbit with n = 2 to the n = 5 state? The energy of an electron in the nth level is
E(subcript n) = -(BZ^2/n^2)
where B = 2.18 x 10-18 J and Z = charge on nucleus (number of protons).
What quantity of energy as heat is required to vaporize a 60 mL of mercury at 357 C, its normal boiling point? The density of mercury is 13.6 g/mL and Atomic Mass is 200.59 g/mol.
Determine the ion notation for an atom with 18 electrons and 20 protons
Write the nuclear equation for the alpha decay ( production of radioactive decay that may be considered radioactive waste products by the useful production of nuclear energy ) of each nuclide that are products of a nuclear power plant Rn-222, T..
The water-gas shift reaction is important in hydrogen gas production. The balanced reaction shown below has a Kp of 9.48 at 700K. If 1.5 atm of H20 are placed in a container and heated to 700K, how much hydrogen gas
A subsequent titration revealed that the concentration of the unknown acid was 0.868 M. What was the concentration of the diluted acid om the Erlenmeyer flask?
draw the structure or structures of ALL the carbocations that could potentially form from the alkenes, and 3) label each carbocation as primary, secondary, or tertiary.
Applying energy to dry ice causes the molecules to phase change straight from a solid to a gas, sublimation. When gas particles hit the walls of a container, they exert pressure. As we apply energy to dry ice, the gas molecules move faster which..
Describe an expreiment to determine the molal freezing point depression constant
Write the following molecular equation, complete ionic equation, and net ionic equation for the following reactions: a) Potassium iodide and silver nitrate solutions are mixed, forming a precipitate of silver iodide. b) Solutions of potassium carbona..
Benzyl ethyl ether reacts with concentrated aqueous HI to form two initial organic products (A and B).
Calculate the Ki for a competitive inhibitor whose concentration is 6.5x10-5M that increases the Km of the substrate
A stock solution is prepared by adding 25 mL of 2.2 M AlCl3 to enough water to make 75 mL. What is the Cl- concentration of 25 mL of the stock solution.
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