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A piece of wood from an archeological site has a carbon-14/carbon-12 ratio that is 12.5% that of the carbon-14/carbon-12 ratio in living materials. How old is the wood from the temple site? The half -life of C-14 is 5,730 years.
Using terms in the Hartree-Fock energy expression, explain why the lowest-energy triplet state of the He atom is higher in energy than the singlet state.
How many moles of (NH4)2SO4 are there in 100.00 g of ammonium sulfate? How many ammonium ions are in 100.00 grams of ammonium sulfate? Use Avogadro's number, 6.0221 x 1023 ions/mol.
A reactant R is being consumed in a first-order reaction. What fraction of the initial R is consumed in 4.0 half-lives
As a scuba diver descends under water, the pressure increases. At a total air pressure of 2.74atm and a temperature of 25.0 ?C, what is the solubility of N2 in a diver's blood? [Use the value of the Henry's law constant k calculated in Part A, 6.2..
What was the initial temperature of the Cu metal If the final temperature of the Cu-H 2 O mixture was at twenty five degree celsius? (The specific heat of copper = 0.377 J/(g°C).)
in flushing and cleaning columns used in liquid chromatography to remove adsorbed contaminants a series of solvents is
The rate of a first-order reaction is followed by spectroscopy, monitoring the absorption of a colored reactant at 520 nm. The reaction occurs in a 1.48- cm sample cell, and the only colored species in the reaction has an extinction coefficient of..
what voltage would you expect based on the joule tomson coefficient value for co2 if op amp is set to 100 for a
a student spots an unknown sample on a tlc plate and develops it in dichloromethane solvent. only one spot for which
Explain how does one find the concentration of the ions of [I], [S2O8^2] and [I2] utilizing the equation c=n/v and stoichiometry
What mass of NaOH is needed to precipitate the Cd2+ ions from 68.0 mL of 0.500 M Cd(NO3)2 solution?
calculate the number of moles of agcro4ksp9.0x1012 that will dissolve in 1.00l of 0.010 m k2cro4 solution. what will be
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