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A piece of pure aluminum is placed in contact with a piece of pure copper. At what temperature should diffusion ooccur for the concentration of copper in aluminum to be 600 kg>m at a depth of 0.2 mm after 10 hours? Pure copper has an effective concentration iof 8,940 kg/m^3
During a photochemical smog episode in a coastal city, the steady-state concentration of oxygen radicals at ground level was measured to be 0.09 ppmv at 25 degrees celsius.
compound has been analyzed and found to contain the following masses of elements: Carbon 0.2990g, hydrogen 0.05489g, nitrogen 0.2318g, and oxyen 0.1328g. calculate the tmpirical formula of the compound.
Use the Born-Haber cycle outlined in Section 9.3 for LiF to calculate the lattice energy of NaCl. (The heat of sublimation of Na is 108 kJ/mol and ?Hof = -411 kJ/mol
How many Pb atoms would be present in a 0.500 L sample of this air (the approximate lung capacity of a human adult)?
In what direction do the functions point? What orbitals are"left" unused on the C atom?
A 10 mL sample of a solution of Pb(ClO3)2 was diluted with water to 21 mL. A 10 mL sample of the dilute solution was found to contain 0.021 moles of Pb2+. What was the concentration of Pb(ClO3)2 in the original undiluted solution?
The Ka of a monoprotic weak acid is 5.16 × 10-3. What is the percent ionization of a 0.153 M solution of this acid?
Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25°C.
Calculate the vapor pressure lowering of a solution of 2.80 g of aspirin (molecular weight = 180.15 g/mol) in 45.0 g of methanol (CH3OH) at 21.2°C.
An amphoteric compound exhibits a. acidic properties b. acidic and basic properties c. metallic properties d
Draw a fully labeled M.O. diagram for carbon monoxide. Be sure to show the atomic orbitals that come together to form the molecular orbitals, and give the orbital type designations. You may disregard core electrons (1s electrons from the atoms).
Using your knowledge of chemistry, describe at least one method that could be used to remove lead(II) acetate from a sample of wine.
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