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A patient is given 0.050 mg of technetium-99m where m means Meta stable - an unstable but long-lived state, a radioactive isotope with a half-life of about 6.0 hours. Explain how long until the radioactive isotope decays to 6.3 x 10(-3) mg?
Explain the three basic types of radioactive particles as well as how they are formed. Give an instance of how each is related to our daily lives.
Compute the amount of heat essential to fully sublime ninety grams of solid dry ice (CO 2 ) at its temperature of sublimation if it is given that the heat of sublimation for CO 2 = 32.3 kj/mol express your answers in kilojoules?
How can you tell from the information provided with the balanced equation. How many mol of O2 are required to form 3.20 mol Fe2O3. How much heat is exchanged when 14.3 kg of iron rusts
Explain what are the equilibrium concentrations of Pb2+ and F- in a saturated solution of lead fluoride if the Ksp value of PbF2 is 3.2x10^-8
A mixture of Ar and N2 gases has a density of 1.592 g/L at STP. What is the mole fraction of each gas?
Concerns over the harmful effects of chlorofluorocarbon on stratospheric ozone motivated a search for new refrigerants. One alternative was 2,2-dichloro-1,1-trifluoroethane (''refrigerant 123''). Estimate the temperature change that would accompany..
a compounds analyzes to be 61.7 cl 26.72 p and 12.11 n. 1.2952 g of the compound was dissolved in 15.00 ml of benzene
An empty Erlenmeyer flask weighs 215.1 grams, when filled with water (d equals 1.00 grams over cm cubed). The flask and it's contents weigh 521.2 grams. What is the flask volume in scientific notation.
For detection using Fluozin-3, what is the excitation wavelength that should be used. For Zincon detection of zinc and copper, what pH range agent do, and why would it be useful for metal detection
How many joules of heat are required to heat 143 g of aluminum from 55.0 oC to 66.5oC?
A solution was prepared by dissolving 28.0g of KCl in 225g of water. Calculate the mass percent of KCl in the solution.
Chlorine has an average atomic mass of 35.453 amu. The main isotopes of chlorine are 35Cl which has an atomic mass of 34.968 amu and 37Cl, which has an atomic mass of 36.956amu. Given this, what is the percent abundance of each isotope in natural ..
a 2.89 g sample of solid calcium carbide cac2 reacted with water to produce acetylene gas c2h2 and aqueous calcium
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