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The ionization potential for a certain atom is 350Kj/mol. If the electron is in the first excited state, the ionization potential is 105 kj/mol. If the atom undergoes deexcitation, what would be the wavelength of the photon emitted?
How many grams of dry NH_4Cl need to be added to 1.60 L of a 0.700 it M solution of ammonia, NH_3, to prepare a buffer solution that has a pH of 8.62? K_b for ammonia is 1.8 * 10^{-5}.
fluorine-18 is a radioactive isotope used to image the brain. thehalf-life of fluorine-18 is 1.83 hours and follows a
The lid is tightly sealed on an empty 2.0L soda bottle at 25.0 degrees Celsius and 732 mm Hg. If the bottle is heated to 100.0 degrees Celsius, what is the pressure in the bottle?
consider the decomposition of ammonium chloride at a certain temperature.nh4cls nh3g hclgcalculate the equilibrium
14.0 moles of gas are in a 6.00 tank at 22.6. calculate the difference in pressure between methane and an ideal gas
Sketch the titration curve for carbonic acid H2CO3. Plot pH on the ordinate axis and relative equivalents of base added on the abscissa axis. Using this figure, indicate what the major species of the carbonate buffe
the ground water in pherric new mexico contains 1.80 mgl of iron as fe3. what ph is required to precipitate all but
a saturated solution of pbio32 in pure water has a lead ion concentration of 5.0 x 10-5 molar. what is the ksp value of
A 4.78g sample of aluminum completely reacts with oxygen to form 6.67g of aluminum oxide. What is the mass percent composition of aluminum in aluminum oxide?
Carbon dioxide makes up approximately 0.04% of the Earth's atmosphere. If you collect a 2.0L sample from the atmosphere at sea level (1.00 atm) on a warm day
Mixture of low molecular weight alkanes, less than 15 carbons in the molecule;
The specific gravity of our calcium chloride solution is 1.33 when processed. The volume in Tank One is 4,250 gallons of processed calcium chloride at 32% pure CaCl2. Water is 8.34 pounds/gallon.
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