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Question: Technetium-99m (gamma emitter, t1/2 = 6.02 hr) is widely used for diagnosis in medicine. A sample prepared in the early morning for use that day had an activity of 6.17 x 10-6 Ci. What will its activity be at the end of the day, that is, after 12.00 hr?
Cyclohexane, C6H12, undergoes a molecular rearrangement in the presence of AlCl3 to form methylcyclopentane, CH3C5H9, according to the equation C6H12 >>> CH3C5H9 If Kc=0.143 at 25*c for this reaction, find the equilibrium concentrations of C6H12 a..
A 25.00 mL aliquot of iron solution was titrated to equivalence with 26.19 mL of 0.0215 M KMnO4. A procedure similar to the one in experiment 7 was followed. Calculate the moles of iron in the original volumetric flask.
Determine the ratio of volumes (cm^3/atom and cm^3/mol) to determine Avogadro"s number (atoms/mole).
What are the coefficients in front of C2H6O and C2H4O when the equation given below is balanced. The reaction occurs in aqueous acid.
The formation of nitrogen monoxide from nitrogen and oxygen. The formation of ozone from molecular oxygen
A rigid flask is initially filled with 4.00 atm of NO2(g) and no N2O4(g) at 100 C. After equilibrium is achieved, the pressure of NO2 is 1.56 atm.
After the above reduction is complete, HCl is added to precipitate the crude product. What is the balanced equation showing this reaction. What impurities would be removed from the product upon washing it with ice-cold water
A can of mineral water contains 345 mL of water. How many molecules of water does the can contain? (water = 1.00 g/mL)
explain how the leaving group leaves and the nucleophile attacks the carbon? What is an example explanation and what do I include in the explanation?
At a certain temperature, the equilibrium constant for the reaction 2HI(g)39. At a certain temperature, the equilibrium constant for the reaction 2HI(g) H2(g) + I2(g) is 0.49.
Nitrobenzene (C6H6NO2) is used in small quantities as a flavoring agent or in perfumes, but can be toxic in large amounts. It is produced by reaction of benzene (C6H6) with nitric acid
A car travels at 58.0 miles per hour and gets 10.0 kilometers per liter of gasoline. How many gallons of gasoline are needed for a 1.00 hour trip.
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