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What happens to isotopes that are unstable? What are the mechanisms by which unstable isotopes may decay into stable isotopes? How may these natural processes be used by chemists to make measurements in the medical, environmental or analytical chemical fields.
Calculate the fraction of the total enzyme active sites in solution that would be in the active form at pH 7.2.
Sketch all steps in the synthesis of each of the subsequent compounds using only organic starting material given plus any needed organic/inorganic reagents.
Homes in rural areas where natural gas service is not available often rely on propane to fuel kitchen ranges. the propane is stored as liquid and the gas to be burned is produced as the liquid evaporates.
the compound freon-12 (CCl2F2) is used as a coolant in refrigerators and air conditioners. It is produced through the following reaction: CCl4+SbF3-> CCl2F2+SbCl3. If 15.0 mole of freon-12 are to be produced, what mass of the carbon tetrachloride ..
the reaction 2nog cl2g -------gt 2noclg is carried out in a closed container. if the partial pressure of no is
How many grams of NaF form when 0.580 mol of HF reacts with excess Na2SiO3?
Question- A sample of O2 gas is stored at 30.0 C and 755 torr. If the volume was 125 mL, how much did the oxygen weigh
The torque needed to turn the journal is 0.2 N*m. Calculate the viscosity of the oil. Will the torque increaseor decrease with time? Why?
why is it important to perform a fractional distallation slowly? what happens if a fractional distallation is done very quickly by rapidly raising
The activation energy for the following reaction is 60. kJ/mol. Sn2+ + 2Co3+ → Sn4+ + 2Co2+ By what factor (how many times) will the rate constant increase.
A gas at 1 atm and 125degC is expanded from a volume of 150mL to a volume of 4L. The pressure of the gas after expansion is 500 torr. What is the temperature of the expanded gas
Calculate the heat lost by the hot water, Calculate the heat gained by the cold water, Calculate the calorimeter constant, using the delta T of the cold water.
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