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1. Rank the items from the highest change in energy to the lowest change in energy. To rank items as equivalent, overlap them.- n=2 to n=5- n=1 to n=3- n=1 to n=5- n=3 to n=4
2. An electron undergoes a transition from an initial (ni) to a final (nl) energy state. The energies of the and energy states are -2.179 X 10^-18 J and -8.720 X 10^-20 J respectively.
Calculate the wavelength of the light in nanometers corresponding to this transition. You can use the following values for your calculations:
How may (a) neutral (b) acidic and (c) alkaline aqueous solutions be defined in terms of concentrations of hidrogen and hydroxyl ions and the pH
Given that: 2 H2(g) + O2(g) ? 2 H2O(g), four moles of hydrogen should react with excess oxygen to produce 2 moles of water.
Assuming the solution is ideal, calculate the composition of the vapor (in terms of mole fractions) at 25°C. At 25°C, the vapor pressures of pure CH2Cl2 and pure CH2Br2 are 133 and 11.4 torr, respectively. Calculate to composition of vapor for a)C..
The reaction is allowed to reach equilibrium. At equilibrium the number of moles of B is 18.32. Calculate the equilibrium constant for the reaction A (g) + 2B (g) reacting with 3 C(g)
What is the molality of a solution in which 25 g of sodium chloride is dissolved in 2.0 kg of water
What volume (mL) of a concentrated solution of magnesium chloride (9.00 M) must be diluted to 350. mL to make a 2.75 M solution of magnesium chloride
Enough of a monoprotic acid is dissolved in water to produce a 0.0197 M. The PH of the resulting solution is 6.41. Calculate the Ka for the acid.
In the early days of the periodic table, the 1870s, both silicon and tin were known elements, but germanium was unknown. Using these trends and the densities of silicon and tin that you just obtained, estimate the density of germanium?
A .0678 g sample of tin sulfate was dissolved in dilute HCl and treated with 10% BaCl2 solution. The BaCl4 precipitate weighed .0737 g. Determine the formula of this sulfate of tin.
triangle symbol h degree 2816kj 6co2g 6h2o l c6h12o6s 6o2 g how is the equilibrium yeld of c6h12o6 affected bya.
Calculate the volume the gas will occupy if the temperature is increased to 175 degree Celcious while the pressure is held constant.
Imidazole is a weak acid, and thus reacts with strong bases to form the corresponding anion. Show this reaction, and draw resonance structures that account for the stability of conjugate base.
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