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1. Explain what is happening to electrons when light is emitted in emission spectra.
2. List the possible energy level changes for electrons emitting visible light in the hydrogen atom. What is the name of this series of lines?
3. Why is it not possible for us to see light emitted from hydrogen atoms when electrons fall either to the ground state or to the third energy level?What are the names of these series of lines?
4. Hydrogen atom electrons emit photons when the fall from higher energy levels to blower energy levels. For the n=4---1 transition, a) calculate the energy change. b) convert the energy to wavelength, and c) identify its place in the electromagnetic spectrum.
Identify each half reaction as oxidation or reduction; mark which reaction occurs in anode and which in cathode. Write the chemical equation describing the spontaneous cell reaction (The overall reaction)
how many kilogram of methane gas must bedischarged in a room of 306 cubic meters to reach the lower explosive limit of
Problem- A 1511 kg car is traveling down the road at 90.6 km/h. While traveling at this rate of speed, what is the kinetic energy of this vehicle in kilojoules
Utilizing published mass excess values to compute the decay energy Q (in MeV) for the following radioisotopes.
Question- Buckyballs (C60) becomes the largest object with measured de broglie. If the mass of C60 molecule is 1.2x10-24 kg. What will be the broglie wavelength if it is moving a speed of 220m/sec
a little girl is celebrating her 7th birthday. each guest is served one large slice of chocolate cake a hamburger
When preparing the solutions for Part A, an aqueous solution of diamine and NaOH is made. Why isn't a solution of NaOH and diacid chloride in cyclohexane made
A concentration cell consists of two Sn/Sn2+ electrodes. The electrolyte in compartment A is 0.15 M Sn(NO3)2. The electrolyte in B is 0.82 M Sn(NO3)2. Which electrode is the cathode
Net ionic equation for Sodium Carbonate and Lithium sulfate. Sodium carbonate and sulfuric acid. Strontium chloride and lithium sulfate.
If the vapor pressure of ethyl ether and ethyl alcohol at 20°C are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20°C
Question- Make a sketch of the voltaic cell represented with the line notation. Write the overall balanced equation from the reaction and calculate the E°cell.
A student constructs a galvanic cell that has a strip oflead metal immersed in a solution of 0.1M Fe(NO3)2 as one half-cell and a strip of zincmetal immersed in a solution of 0.1M Zn(NO3)2 Which half-cell is the cathode
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