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The half life of technetium -99m is 16.01 hours. If a sample with an initial activity of 15 mCi(microcurries) is injected into a patient, what is the activity in 24 hours, assuming that none of the sample is excreted?
61.5 mL of 0.11 M sodium hydroxide were required to completely neutralize 23.7 mL of sulfuric acid. Calculate the concentration of the sulfuric acid solution
The first-order rate constant for the decomposition of N2O5, 2N2O5 --> 4NO2 + O2 at 70 degrees C is 6.82 * 10 ^-3 . Suppose we start with 2.90×10?2 of in a volume of 1.7 L. A)
If 17.0 mL of 0.800 M HCl solution are needed to neutralize 5.00 mL of a household ammonia solution, what is the molar concentration of the ammonia?
Determine which structure do you expect to contribute the most to the actual structure of BrO 4 - keep in mind to take in expanded octets, as suitable?
Suflur dioxide may be catalytically oxidized to sulfur trioxide. How many grams of sulfur dioxide could be converted by this process if 100.0 grams of oxygen are available for the oxidation?
Calculate the molecular mass of the nonionic solutes: 8.02 g of solute in 861 g of water lower the freezing point to -0.430 degrees C.
Determine the theatrical yield if 1.56 grams of hydrogen is permitted to combines with 9.70 grams of nitrogen producing 1.43 grams of ammonia?
Camphor (C10H16O) is a natural compound found in the wood of camphor laurel, an evergreen native to southeast Asia. Borneol (C10H18O) and isoborneol (C10H18O) are similar to camphor
How much time is required to produce 200g of alumimun metal for molten aluminum oxide dissolved in cryolite, if you use a 12.0 amp current.
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.210 M HClO(aq) with 0.210 M KOH(aq). (a) before addition of any KOH (b) after addition of 25.0 mL of KOH (c) after addition of 40.0 mL of KOH
When 0.490 kJ of heat is added to the gas, it expands and does 211 J of work on the surroundings. What is the value of delta H and delta E for this process?
Draw and name the molecule which contains only carbon and hydrgen atoms only three of which are carbon
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