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Cobalt is element 27. Cobalt-60 is used in the medical treatment of cancer. How many neutrons and protons are contained in the nucleus of this isotope?
Any advice on how you got the answer would be very helpful.
Calculate the pH during the titration of 100.0 mL of 0.200 M HCl with 0.400 M NaOH. First what is the initial pH (before any NaOH is added
A) aqueous naoh and ch3ch2co2h B) aqeous naoh and c6h5so3h c) ch3ch2Li in hexane and ethyne d) ch3ch2Li in hexane and ethyl alcohol
the instrument response S for each of the five solutions, measured with a colorimeter, was found to be 0.240, 0.437, 0.621, 0.809, and 1.009, respectively. What was the concentration of Fe3+ in the water sample?
The Reaction A->B+C is second order in A. When [A]0=0.100 M, the reaction is 20% complete in 53.7 minutes. calculate the value of the rate constant( in L/min mol)
Determine the empirical and molecular formulas of Ibuprofen has 75.69% C, 8.80%H and 15.51%O by mass and has a molar mass about 206g/mol.
Determine the enthalpy for the partial combustion of methane to carbon monoxide.
A tank contains N2 at 1.0 atm and O2 at 2.0 atm. Helium is added to this tank until the total pressure is 6.0 atm. What is the partial pressure of the helium?
The concentration of Mg2+ in seawater is 0.052 M. At what pH will 77% of the Mg2 be precipitated as the hydroxide salt? [Ksp for Mg(OH)2 = 8.9 10-12.]
The material was used for thermal insulation in the 2003 Mars Exploration Rover. If the maximum space for insulation in the spacecraft's hull was 2294 cm3, what mass (in grams) did the aerogel insulation add to the spacecraft?
If 2.50 L N2 react with 7.00 L H2, what is the theoretical yield (in liters) of NH3? Assume that the volumes of reactants and products are measured at the same temperature and pressure.
In the reaction of aluminum metal and oxygen gas to make aluminum oxide, how many moles of aluminum will react with 0.80 grams O2?
If you wanted to prepare a 1.45 L buffer with a total phosphate concentration of 0.0500 M, how many grams of NaH2PO4 and Na2HPO4 would you mix together? How many grams of conjugate acid do you need? How many grams of conjugate base do you need?
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