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Many hospitals, and some doctors\' offices, use radioisotopes for diagnosis and treatment, or in palliative care (relief of symptoms such as pain). Some radioisotopes used in medicine are listed below. Write the isotope symbol for each radioisotope. Replace the question marks with the proper integers. Replace the letter X with the proper element symbol.
a) Technetium-99:
b) Cobalt-60:
c) Rhenium-186:
Starting with needed alkanes, alkenes and inorganic regrets, devise syntheses for the following compounds. Yout method should produce each compound in good yield and free of isomers.
You have 500 mL of a 5.0 M solution of nitric acid HNO3 (63.01 g /?mol) dissolved in water. How many grams of nitrogen does the solution contain.
Which of the following is a property of acid solutions?
A gas occupies a volume of 449 mL at 12.9°C and 737 mm Hg pressure. Calculate the volume the gas would occupy at STP.
calculate the pH and concentration of all species present assuming that the activity coefficients are equal to 1.0 for all species
Which one of these equations describes a redox reaction?
a 1L flask contained 2g N2, 0.4g H2 and 9g O2 at 27c. what is the total pressure in the flask?
For a solution having .0025 equivalents/liter total alkalinity (contributions from HCO3-, CO3-- and OH- (hydroxide)) at [H+] = 4.69E-11, what is the percentage contribution to alkalinity from CO3--?
Given the values of DGfo given below in kJ/mol, calculate the value of DGo in kJ for the combustion of 1 mole of propane to form carbon dioxide and liquid water.
The water level in a graduated cylinder initially at 223 mL rises to 282 mL after a piece of lead is submerged. What is the mass in grams of the lead?
3 State what happened when 2 drops of concentrated hydrochloric acid are added to the bromophenol blue indicator. Explain the change in terms of equilibrium.
What types of crystals are formed by the following solid elements and compounds: BF3 BN (NH4)CO3? In each case, state the types of forces among the particles
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