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find t what temperature is it necessary to have twice as many atoms in the ground state as in the excited state at 16.4 1/cm of c atoms The degeneracy of the ground state is 1 and the first state degeneracy is 3
Phosphoric acid is a weak triprotic acid with the formula H3PO4. If you have 50.0 mL of a 1.0 M solution of H3PO4, how many grams of NaOH (MM = 40.0g/mol) should you add to make a buffer with a pH of 7.00?
Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.
Compute the activation energy for the flashing process. When At 29 o C the average rate is 3.3 flashes every 10 seconds; at 23 degree Celsius the average rate
Determine the molar mass of a covalent compound to be about 220gmol-. In another experiment you establish that its empirical formula
However, both qsolution and it can be either positive or negative numbers. Based on this a) If the solution cools down, is T a positive or negative number? Explain.
Identify the two important classes of catalysts. Analyze the chemical reactions that take place when a biological catalyst combines with a reactant (substrate) to form an unstable intermediate.
An organofluorine compound has a density of 0.773 g/L at 18.5 C and 223 mm Hg pressure. calculate the molar mass of the compound
The wavelength corresponding to the threshold frequency to tungsten surface is 230nm. Calculate the kinetic energy of the photoelectron ejected from the surface of tungsten metal.
Is the molecular formula of saccharin (a) C14H10O6N2S2, (b) C5H7O3NS, (c) C8H9O2NS, or (d) C7H5O3NS?
A 28.5 g sample of an unknown metal is heated to 95.0C and then dropped into 58.0 g of water in a coffee-cup calorimeter. The temperature of the water rises from 23.5 C to 27.1C.
If 164 of wet is collected over water at 24 degrees C and a barometric pressure of 737 Torr , how many grams of Zn have been consumed? (The vapor pressure of water is 22.38 Torr)
A 782 mL gas sample at STP is compressed to a volume of 131 mL, and the temperature is increased to 22?C. What is the new pressure of the gas in Pa?Answer in units of Pa.
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