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For half life problems how would you solve this. How old is a bottle of wine if the tritium (h-3) activity is 25% that of the new wine (h-3 half life =12.3 years)?
find the electronic configuration for ionization energies of magnesium the orbital number in which the electrons are
A battery is constructed based on the oxidation of magnesium and the reduction of Cu^2+. The initial concentrations of Mg^2+ and Cu^2+ are 1.2×10?4M and 1.6M, respectively, in 1.0-liter half-cells.
When the stopper is removed from a partly filled bottle containing solid and liquid acetic acid at 16.7degrees C a strong vinagerable odor is noticeable immediately. How many acetic acid phases must be present in bottle. Explain.
Consider a chromatogram containing a single analyte with retention time of 4 minutes. The mobile phase elution time is 0.2 minutes. What is the capacity factor (k') for the analyte in question?
Combustion of 3.00 g of this compound produced 7.06 g of CO2 and 1.93 g of H2O. What is the empirical formula of the unknown compound?
6Na+Fe2O3->3Na2O+ 2Fe. If you are provided 20.0 moles of sodium & excess iron (III) oxide, how many moles of iron would form?
"disappeared" from a rock face that is adjacent to a lake (original pH=6.7) with dimensions 100 m x 40 m x 10 m. You think that the "disappearance" is due to leaching of the pyrite into the lake. To prove your point, what would the new pH of the l..
Explain when coal is burned, the sulfur present in coal is converted to sulfur dioxide (SO2) which is in charge for the acid rain phenomenon.
What type of glassware would you use to measure the volume of a .002035 M sodium nitrate
If 0.215 mole of calcium chloride is dissolved in 491.9 ml of water, how much will it change the temperature of water (FWt=18.02)? The delta H=-81.3 kJ/mole for CaCl2
The tabulated mass of Cl is 35.45 amu. The two dominant isotopes of naturally occurring Cl are 35Cl (34.97 amu) and 37Cl (36.97 amu).
Calculate the equilibrium pressures of all species. What is the value of Q for this system
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