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Sodium lights are often utilized in street lamps because the emitted light is essentially monochromatic, decrease blurriness in human vision that is due to astigmatism. The professed "D-line" of the sodium emission spectrum has a wavelength of 5893 Angstroms. Presuming the emission is due to an electron transition between two consecutive energy levels, compute the energy levels involved
Arrange the following aqueous solutions in order of increasing freezing points (lowest to highest temperature): 0.10 m glucose, 0.10 m BaCl2, 0.20 m NaCl, and 0.20 m Na2SO4.
The convention of arbitrarily assigning a zero enthalpy value to all the most stable elements in the standards state and (usually) 298 K is a convenient way of dealing with the enthalpy changes of chemical processes.
Write the reaction equation for acid-base equilibrium between hypochlorous acid and hypochlorite ion.
the pH of the two equivalence points and the volume
Explain in detail how much heat is absorbed/released when 30.00 g of NH3(g) reacts in the presence of excess O2(g) to produce NO(g) as well as H2O(l) according to the following chemical equation? 4 NH3(g) + 5 O2(g) ? 4 NO(g) + 6 H2O(l) ?H° = 1168 k..
A student in lab has 3.00 g of pure N2 in 0.541 g pure H2. The reaction happens following this equation: N2(g) + 3H2(g) → 2NH3(g) How many grams of NH3 would be produced?
A certain acid HX is dissolved in water to make a 0.10M solution. At equilibrium, the concentration of X^- ions is 1.0 x 10^-5 M. The Pka of HX is approximately?
Using the thermochemical data given for NO2 and N2O4 in class, determine the fraction of N2O4 that will dissociate into two NO2 molecules if one mole of pure N2O4 is introduced to a 10 liter constant volume,
what is the maximum mass of aspartame you can add to 2.00kg of pure water and still have the solution freeze.
flask "a" has a volume of 0.50 L and contains 50 g of a volatile liquid. Flask "b" has a volume of 1.35L and contains 34.8 g of the same liquis. Both flasks are stoppered and both are at 30C. The ratio of the vapor pressure of the liquid in the fl..
If an electrode has a potential of -1.004 V with respect to a saturated calomel electrode, what is the potential with respect to a silver-silver chloride electrode
if 8.000 grams of copper atoms is weighed out on balancewith an error of - 0.002g how many atoms of copper couldyou be
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