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a line in the Balmer series of hydrogen has a wavelength of 434 nm from what state did the electron originate
Calculating Delta H, Use some or all of the following reaction enthalpies to calculate delta H for the reaction:
A 3.00 g sample of a salt dissolves in 9.10 g of water to give a saturated solution at 25°C. What is the solubility (in g salt/100 g of H2O) of the salt?
What mass of sucrose should be combined with 467 g of water to make a solution with an osmotic pressure of 8.30 atm at 300 K? (Assume the density of the solution to be equal to the density of the solvent.)
According to the valence bond theory, which of the following molecules involves sp2 hybridization of orbitals on the central atom?
A 1.00 g sample of enriched water, a mixture of H2O and D2O, reacted completely with Cl2 to give a mixture of HCl and DCl. The HCl and DCl were then dissolved in pure H2O to make a 1.00 L solution
Find six letters of the alphabet that belong to C2v, Find at least one that belongs to D2h and at least one that belongs to D4h.
An evaluation of R was performed, following the procedure. The barometric pressure was 736torr, the temperature was 295K, and the volume of hydrogen gas collected was 35.6mL. The calculated value of R was 82.1 atm K-1 mol-1. How many grams of magn..
A 55.0-L steel tank at 20.0°C contains acetylene gas, C2H2, at a pressure of 1.39 atm. Assuming ideal behavior, how many grams of acetylene are in the tank?
The atmospheric pressur on Pluto is 3 microbars. Express this pressure in bars, kPa, atm, and torr.
which of the following exhibits dipole-dipole intermolecular forces: HBr, NBr3, SBr2, CBr4?
If the extinction coefficient of cobalt (II) ion is 5.0, what would the absorption of the solutioni in 2-a be in a 1.00cm cell
Calculate the pH of this solution. When 0.20 mol of H+ ions is added to the solution what is the pH (assuming volume change is negligible)
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