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1. Americium-241 primarily emits alpha radiation. The Americium-241 in your smoke detector is stored in a sealed chamber that is unlikely to break down or corrode over time. The seal can however be broken by the use of force such as using a hammer. In the unlikely event that someone in your vicinity takes a hammer to the smoke detector, how can you protect everyone from radiation?
2. Fiestaware is radioactive because the glaze used contains uranium oxide. The half-life of the uranium-238 isotope present in these dishes is about 4.5 billion years. This implies that most of Uranium-238 initially decays into thorium-234 and an alpha particle as shown in the background, but thorium-234 can further decay to emit beta particles and gamma radiation. What is the decay reaction of thorium-234?
A dry natural gas of the following (Orsat) composition: 80.5% CH4, 17.8% C2H6, and 1.7%N2 is used at the rate of 1200ft3/min at 600F and 30 inches of Hg absolute to burn the incineration off gas with air.
A solution of I- gives 301.0 mV in a cell with an iodide ion selective electrode. 10.0 mL of the solution is mixed with 3.00 mL of 1.00 x10^-6 M AgNO3, and the Ag is completely precipitated as AgI. The cell then gives 310.2 mV. Assume the electrod..
A 26.1 g sample of pure iron at 77°C is dropped into 93 g of water at 17°C. What is the final temperature of the water-iron mixture.
Compute the pH at the equivalence point in the titration of 45mL of 0.190 M methylamine with a 0.305 M HCL solution. Compute the pH of 0.33M NaF solution. Ka for HF=7.1x10-4
Construct a frost circle for imidazole with one 2p orbital on each atom of the ring, and show relative energy of all pi molecular orbitals. fill in the appropriate number of electrons
If a triacylglycerol in peanut oil that contains one palmitic acid, one oleic acid, and one linoleic acid is completely hydrogenated, what is the product
A city requires to contract a laboratory to monitor the quality of drinoing water. Review the call for tender. State your approach to monitoring the methodology that you will pursue and the quality level of your work.
What is the solid that precipitates and how much of it is formed when an excess of sodium chloride solution is mixed with 35.0 mL of a 2.10 M silver nitrate solution
1.a student measures that the solution freezes at temperature of -7.24 degree celsius when 64.311 f of an unknown
The vapor pressure of a solution containing 5.40 g of a nonvolatilesubstance in 90 g water is 23.32 torr. What is the molar mass of the solute?
At STP, 50.0 mL of a gas weighs 0.301g and is found to be 47.4% sulfur and 52.6% chlorine. What is the molecular formula of the gas
The freezing point of an aqueous solution containing 15 g of a nonelectrolyte in 150 mL water is -5.4°C. What is the molecular weight of the compound? Kf = 1.86°C/m for water.
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