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A photon emitted during an electronic transition in a hydrogen atom has a wavelength of 486.2 nm. From what initial energy level (ni) did the electron transition?
Calculate the initial rate of polymerization and the molar mass of the poly (methyrl methacrylate) formed in the initial stages of the reaction given that the relevant rate cofficients at 60 degrees are:
Calculate the pH at the halfway point and at the equivalence point for each of the following titrations. (a) 100.0 mL of 0.42 M HC7H5O2 (Ka= 6.4 multiplied by 10-5) titrated by 0.42 M NaOH halfway point equivalence point
how much heat is absorbed when 63.7g h2o at 100 c and 101.3 kpa is converted to steam at 100 c.
If 3.8 kcal is released by combustion of each gram of glucose, how many kilocalories are released by the combustion of 1.41 mole of glucose?
The rate of disappearance of HBr in the gas phase reaction is 0.103 Ms-1 at 150 deg Celsius. what is the rate of reaction.
A hydrogen molecule in it's ground vibrational state with KE=10eV collides with heavy atom metal surface and no energy is transferred to the surface, i.e., the surface can be modeled as an infinite potential wall.
After 273 m3 of ethylene oxide at 748 kPa and 525 K is cooled to 293 K, it is allowed to expand to 1.10 × 103 m3. What is the new pressure?
The atmospheric pressur on Pluto is 3 microbars. Express this pressure in bars, kPa, atm, and torr.
How long does it take to deposit a coating of gold 1.00um thick on a disk-shaped medallion 4.00 cm in diameter and 2.00 mm thick at constant current of 89 A?
Calculate the pH of a solution prepared by dissolving .370 mol (HCO2H) and .230 mol (NaCO2H) in H2O sufficent to yeild 1.00L of solution. Ka=1.77x10^-4
what is the volume change when 2 kg of water at 6.8 MPa and 93 Celsius expands to 1.6 bar
If you have 24.0 g of NaCl dissolved in 306 mL, what is the molarity of the solution
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