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1. Lead-210 has a half-life of 20.4 years. This isotope decays by beta particle emission.a.) Write a balanced nuclear equation for the decay of lead-210b.) What is the activity (in millicuries) of a 0.500 t sample of the isotope (atomic mass = 210.0 amu)?
2. Th-230 decays by alpha emission.a.) Calculate m in grams when one mole of Th-230 decays.b.) Calculate E in kilojoules when one gram of ^230Th decays.
3. Be-10a.) Calculate the mass defectb.) Calculate the binding energy
Water's bad smell containing hydrogen sulfide H 2 S that can be removed by the action of Cl considering the given reaction.
As per the Haber Process(N2(g)+ 3 H2(g)= 2 NH3(g) ) ,what mass of nitrogen should you see in the reaction If you must produce 700g of ammonia? Percent yield of this reaction = 70%
Determine how many milligrams of H 2 O are present in sample If the freezing point of a 100.0g sample of 2-methyl-2-propanol =24.59C?
How many metric tons of 5%-S coal would be needed to yield the H2SO4 required to produce a 2.5-cm rainfall of pH 2.00 over an area of 100 square kilometers?
Hardness in groundwater is due to the presence of metal ions, primarily Mg2+ and Ca2+. Hardness is generally reported as ppm CaCO3 or mmol/L Ca2+.
What hybrid orbital would be expected for the central atom in each of the following: Draw the molecular structure of these compounds and label Ï? and Ï?bonds.
Provide the newman projections across the C 2 -C 3 bonds for the major conformers after Drawing the zig-zag structures of all the isomers of 2,3-diaminopentane.
What is the theoretical yield and percent yield for this reaction under the given conditions?
Describe the major absorption bands in the IR spectrum - indicate the bonds responsible for those peaks which prove you have synthesized isopentyl acetate and that it is an ester.
Calculate the Mn of the polyisobutene if A 7.5g polymer sample found to discolor 3.4 mL of a 0.05 M solution of Br in CCl4 ?
Step-wise solution to a numerical problem related to a flocculation-based water treatment plant having a flow of 25 MGD. The plant is to employ alum coagulation.
Compute the density of dry air and molar mass at zero degree Celsius temperature and 1.0 atm of pressure.
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