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1. Give the configuration of the valence shell for germanium.
2. The energy needed to heat a 235 mL cup of water is 59.99 kJ. Using your microwave oven, how many moles of photons are needed to heat a 235 mL cup of water? Most microwave ovens emit microwaves that are absorbed by water at a wavelength of 12.24 cm.
3. At what velocity, in km, would an electron have to be moving to eject an electron from an atom of neon, which has a first ionization energy equal to 2080 kJ mol-1? (The mass of an electron is 9.10938291 x 1031 kg)
Water expands on freezing. Since water is the principle ingredient in soft drinks when the soft drink freezes it will rupture the can.
A 25.0-mL aliquot of vinegar was diluted to 250 mL on a volumetric flask. Titration of 50.0-mL aliquots of the diluted solution required an average of 34.88 mL of 0.09600 M NaOH. Express the acidity of the vinegar in terms of the percentage (w/v) ..
An experiment shows that a 115 -,mL gas sample has a mass of 0.170 g at a pressure of 711 mm; Hg and a temperature of 33Celcius. What is the molar mass?
The angular / azimuthal quantum number equals 6, how many distinct magnetic quantum values are possible? (m sub l)
Question- A piece of aluminum (mass = 50.0 g) at 398 K is placed in a styrofoam coffee cup containing 75.0 mL of water at 298 K. Assuming that no heat is lost to the cup or the surroundings, what will be the final temperature of the water. The spe..
What are the proper names for each of the pieces of glassware commonly used in distillation. In distillation, how is a column different than a condenser? How is a fractionating column different than a plain column
How many milliliters of a 120 mL solution of 1.51 M BaCl2 must be used to make 16 mL of a solution that has a concentration of 0.3 M Cl-?
The internuclear distance in NaCl(g) is 2.3606 angstrom, whereas in NaCl(s) the shortest Na-Cl distance is 2.814 angstrom. Explain why this should be so when the binding energy is larger in the crystal.
The ozone layer is about 20 km thick, has an average total pressureof 10 mm Hg(1.3 * 10^-2 atm ) , and has an average temperature of 230 K. The partial pressure of ozone in the layer is only about 1.2 * 10^-6 mm Hg( 1.6 * 10^-9 atm ).
You dissolve 650.0 g of sugar (C12H22O11) in 726 mL of water. The density of wat is 1.00 g/mL.
If you dilute 21.0 mL of the stock solution to a final volume of 0.500 L, what will be the concentration of the diluted solution?
25.0 mL of a gas with a pressure of 1.00 atm is contained in a balloon at 25.0 C. The balloon is then cooled to 5.0 C, and the pressure is found to be 0.750 atm. What is the volume of the gas under the new conditions?
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