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The isotope, Cesium 137, has a half life of 30 years. Cesium-137 is a produced in nuclear power plants. We currently find high levels of Cs-137 in the area surrounding the highly radioactive reactor in Japan. How long will it take for the isotope to decay to about 1/8th of its original amount? Show all work for full credit.
a sugar water mixture contains 45.8g of sugar and 108.5 g of water. what is the percent by mass of sugar and the
determine how many grams of potassium sulfate can be formed from 150.0 grams of potassium hydroxide with sufficient
1.00 grams of magnesium and 2.50 grams of oxygen react together in a synthesis reaction to form magnesium oxide. write
In a combustion reaction 4 moles of C8H18 react with 8 moles of O2. If the actual yield of CO2 produced is 28.16 grams, what is the percent yield?
Calculate the pH of a 0.047 M solution of carbonic acid H2CO3. The Ka1 of carbonic acid = 2.6 x 10-7 and the Ka2 of carbonic acid = 5.6 x 10-11 what is the easiest way someone can explain this
A compound called pyrene has the empirical formula C8H5 . When 4.04 g of pyrene is dissolved in 10.00 g of benzene, the boiling point of the solution is 85.1°C.
One Step is a product sold as a cleaner/sanitizer and has the formula 2Na2CO3?3H2O2. If 15.175 g of this compound is dissolved in water and diluted to exactly 1 gallon as directed
Show the Chemical behavior of an atom - The chemical behavior of an atom is determined by most directly by the
Note that the absolute stereochemical configurations of chiral substances cannot be determined from the data. Arbitrarily draw a configuration for an enantiomer (and be consistent with the derivatives); omit wedge/dash bonds for a racemate.
What is the driving force for losing a proton as the last step in electrophilic aromatic substitution
An unknown is believed to be an alcohol because the IR spectrum showed broad absorption at 3200-3500 cm-1 and no absorption in the 1700-1750 cm-1 region.
Calculate the pH of a solution prepared by dissolving 0.30 g of BaO in enough water to make 0.800 L of solution.
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