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The first atomic explosion was detonated in the desert north of Alamogordo, New Mexico, on July 16, 1945. What fraction of the strontium-90 ( years) originally produced by that explosion still remains as of July 16, 2006? In Addition, Iodine-131 is used in the diagnosis and treatment of thyroid disease and has a half-life of 8.1 days. If a patient with thyroid disease consumes a sample of Na131I containing 10 of 131I, how long will it take for the amount of 131I to decrease to of the original amount?
Wet air containing 4.0mole% water vapor is passed through a column of calcium chloride pellets. The pellets adsorb 97.0% of the water and none of the other constituents of the air. The column packing was initially dry and had a mass of 3.40kg, fol..
Why does the dielectric constant of water drop as a function of temperature?
What is the best way to report density and absolute error in density based on the mass and volume measurements? Choose the single best answer 10.07 ± .194 gm/ml 10. ± .2 gm/ml
Given the following experimentally determined standard molar entropies at 298.15 K and 1 bar, S [CH3OH]=126.8 J⋅K-1⋅mol-1 S°[CO]=197.7 J⋅K-1⋅mol-1
Please answer these simple five questions on fabrication engineering at the micro and nanoscale.
question 1nbspheat capacities cv and cp are defined as temperature derivatives respectively of u and h. show that the
Calculate the stoichiometric reactant ratio (mol H2 react/mol C2H2 react) and the yield ratio (k mol C2H6 formed/k mol H2 react).
The data in Table 1 were obtained from a kinetic study of an enzymatic reaction. The substrate S (with a concentration s) was converted, using an enzyme, to a product in 4 different experimental runs. The initial conditions of each experiment (initia..
at atmospheric pressure ethyl acetate and ethyl alcohol form an azeotropic mixture containing 53.9 mole of ethyl
One of the classical methods for the determination of the manganese content in steel is to convert all the manganese to the deeply colored permanganate ion and then to measure the absorption of light.
read the titled book nontechnical guide to petroleum geology exploration drilling and production 2nd editionwritten by
Assume the plant is built at time zero and begins operation at full rate in year 1. Assume the rate of corporate income tax is 35% and taxes must be paid based on the previous year's income.
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