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A ground state H-atom absorbs a photon of wavelength 94.38 nm, and its electron attains a higher energy level. The atom then emits two photons: one of wavelength 3174 nm to reach an intermediate level, and a second to reach the ground state. What was the wavelength of the second photon emitted?
When the 400 mL of solution was treated with an excess of 2.00 M sulfuric acid and boiled to remove all the gas in solution, 3.73 L of dry carbon dioxide gas measured at 740 mm Hg and 22 C were obtained. Calculate the molarity of the sodium carbon..
What is the PH of a solution prepared by dissolving 5.3g of lithium hydroxide in water to give 280ml of solution.
a female patient requires 2.70times10-2 grams of a sulfa drug then determines how many tablets should be given to her
Suppose a can contains a residual amount of gas at a pressure of 755 mm Hg and a temperature of 25 °C. What would the pressure be if the can were heated to 1155 °C?
what is the resulting pH when mixing 200.0mL solution of 0.50 N HCl (strong acid) with 300.0mL solution of 0.45 M KOH (string base)
Assuming that the specific heat of the solution is 4.18 KJ and that the calorimeter itself absorbs a negligible amount of heat, calculate delta H in kilojoules for the reaction K2O+H2O->2KOH
the acetylsalicylic acid into sodium acetylsalicylate but not give excess of sodium hydroxide in your solution? sodium hydroxide has a molecular weight of 40.00grams/mole
Calculate the values for T (in K), w, delta U, and delta S. Neglect PV quantities for water and assume ideal behavior for water vapor.
In a typical experiment, you drop a gelatin capsule containing 0.1458 g of an Al-Zn alloy sample into an HCl solution. a) Write the equations that represent the chemical reactions that take place after the capsule has dissolved in HCl?
If all of the energy from the emitted alpha particles is absorbed by the animal's tissues, and if the energy of each emission is what is the dose in rads to the animal in the first 4.5 hours following the ingestion of the radioactive material
First, plot the potential energy as a function of the electron's distance from the nucleus, i.e.,V(r) . (Be sure to remember the sign of this potential.)
Hydrocarbons are often reacted with steam to form H2, as shown for propane- C3H8(g) + 6 H2O(g) 3 CO2(g) + 10 H2(g) Calculate Kp for this reaction at a particular temperature
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