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One type of commercial smoke detector contains a minute amount of radioactive americium-241 (241Am), which decays by -particle production. The particles ionize molecules in the air, allowing it to conduct an electric current. When smoke particles enter, the conductivity of the air is changed and the alarm buzzes. a. Write the equation for the decay of 241 95Am by -particle production. b. The complete decay of 241Am involves successively , , , , , , , , , , , and production. What is the final stable nucleus produced in this decay series? c. Identify the 11 intermediate nuclides.
A standard practice in refineries is to use a holding tank in order to mix the light naphtha output of the refinery for quality control. During the first six hours of operation of the refinery, the stream feeding the holding tank at 200 kg/min had 30..
The adipic acid plant described in Examples 9.5 and 9.9 is to be built in China, with a location factor of 0.85. The cost estimate needs to be updated from 2006 to 2012. Up to 45% of the total investment can be secured as a low-cost loan at an int..
1name the five classes of fire and give an example of each. describe how an extinguishing agent controls each class of
Chlorine has two isotopes 35Cl and 37 Cl, for the anion Cl- , of the isotope 37 Cl, specify the number of protons np ,number of electrons ne and numbers of neutrons nn
Construct a table that summarizes the Level 0 information that you have, and information that you might need to obtain. Comment on choices that might need to be reconsidered and why. Comment on what you will do about currently missing information.
when sulfuric acid is a component of polluted air it chemically attacks statues memorials and monuments made from
Determine the energy needed to quench a hot gas with water, Assume we have a 100,000 cubic foot per minute gas (air) stream at 700 degrees F that goes to an air pollution control device
Describe the main purpose of the Globally Harmonised System of Classification and Labelling of Chemicals - Outline the bridging principles for classification of mixtures
A 25.00-mL sample of hydrochloric acid solution requires 24.16 mL of 0.106 M sodium hydroxide for complete neutralization. What is the concentration of the original hydrochloric acid solution?
Determine the minimum electric potential difference (in volts) that must be applied to accelerate an a-particle so that on interaction with a hydrogen atom, a ground state electron will be excited to n = 6
Suppose you discover after the combustion has been carried out that the thermocouple is not functioning properly. Use the final pressure gauge reading of 75.3bar to estimate the adiabatic flame temperature of cyclopentane. Do not assume ideal gas ..
Natural gas composed of 60. mol% methane, 30. mol% ethane, and 10. mol% propane at 25 °C and 500. psia is fed at a rate of 50. m3/hr into a boiler. In the boiler it is blended with enough air to provide 20% excess oxygen and combusted.
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