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The bulk semiconductor Si has a band gapof 1.1 eV. What wavelength of light would be emitted from an LED made from Si?
Naturally occurring chlorine consists of only two isotopes: chlorine-35 and chlorine-37. The atomic mass for chlorine on the Periodic Table is approximately 35.5. What are reasonable estimates of the relative percentages of chlorine-35 and chlorin..
what type of intermolecular forces accounts for kr atomica weight 84 boils at
How do the cycles normally function? How does the production cycle of water bottles change each of the cycles? What benefits would each measure have?
A tiny speck (8.3 x 10-7 mol) of americium-241 is used in smoke detectors, how many atoms of americium-241 are there in one of these smoke detectors?
Problem- In the following reaction, how many grams of H2O are produced if 4.15 g of N2H4 react. N2H4 + 3O2 2NO2 + 2H2O
calculate the specific heat of a substance if a 35 gram sample absorbs 28 joules as the tempature is raised from 292 kelvin to 313 kelvin.
What is the fraction of A remaining after 91.622 minutes if the first order rate constant is 2.687e-4 s-1
Describe an incident (fire, spill, explosion, etc) you have experienced (or research one on the Internet, professional journal, or scientific magazine article) that involved a hazardous organic material(s) and required mitigation.
One beaker contains pure water, another contains salt water, and another contains sugar water. How can you tell the which beaker is Which?
Calculate the standard entropy, ΔS°rxn, of the following reaction at 25.0°C using the data in this table. The standard enthalpy of the reaction, ΔH°rxn, is -633.1 kJ·mol-1.
The reactions occur in acidic solution. (Use the lowest possible coefficients. Omit states-of-matter in your answer.) (a) MnO4- + H2SO3 ? Mn2+ + SO42-
The half life of Iodine-131 is 8.0252 days. If 14.2 grams of I-131 is released in Japan and takes 31.8 days to travel across the Pacific
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