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The electron in a hydrogen atom moves from level n=4 to level n=6.
Is a photon emitted or absorbed?
What is the wavelength of the photon?
If a pure R isomer has a specific rotation of -152.0°, and a sample contains 71.0% of the R isomer and 29.0% of its enantiomer, what is the observed specific rotation of the mixture
Determine the volume of H2S (at 375 K and 1.20 atm) needed to produce 55.0 g of S. Assume that there is excess SO2 present. 2 H2S(g) + SO2(g) ? 3 S(s) + 2 H2O(g)
An ice cube (mass 30 g) at O°C is left sitting on the kitchen table, where it gradually melts. The temperature in the kitchen is 25°C. Calculate the change in the entropy of the ice cube as it melts into water at O°C. (Don't worry about the fact ..
Titration with sodium thiosulfate required the use of 18.94mL of 0.07992M Na;>203' Find the molarity of ascorbic acid in the juice.
The solubility of benzoic acid at 0oC is 1.7g/L and at 90oC is 45.5g/L. How much water do you need to dissolve 0.455 g of benzoic acid at 90oC. How much of the original benzoic acid will remain in the solution once the temperature is reduced to 0o..
calculate concentration of chromate ion (CrO4) in a 0450 M solution of chromic acid (H2CrO4). (for chromic acid, Ka = .18, Ka2 = 3.2 x 10E-7)
The Keq=4.2 for the reaction: H2(g) + CO2(g) -- H2O(g) + CO(g)at 1650degrees C. Initially 0.80mole H2 and 0.80mole CO2 are injected into a 5.0-L flask. Compute the concentration of each species at equilibrium.
If the solubility of a gas is 7.5 g/L at 404 kPa pressure, what is the solubility of the gas when the pressure is 202 kPa.
Henry's law predicts a simple relationship between solubility and pressure. If the solubility of oxygen gas
If you were an advisor at a global summit on alternative energy, which source of energy would you recommend countries invest more money in?
adenosine triphosphate atp is used to generate chemical energy in plant and animal cells. the molecular formula for atp
What mass of melamine, C3N3(NH2)3 will be obtained from 178.5 kg of urea, CO(NH2)2 if the yield overall reaction is 83.0%
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