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Calculate the energy (in eV/atom) for vacancy formation in some metal, M, given that the equilibrium number of vacancies at 404oC is 7.40E+23 m-3. The density and atomic weight for this metal are 15.9 g/cm3 and 65.20 g/mol, respectively.
The standard enthalpy of formation of Zn^2+ (aq) is -153.9kJ/mole. How much heat is evolved when 0.3724 g of Zn(s) reacts with excess hydrochloric acid
When an ionic solid dissolves in water, water molecules attract the ions causing them to dissociate of come apart. The resulting dissolved ions are electrically charged particles that allow the solution to conduct electricity. The following chemic..
Ammonium bicarbonate is used for our column chromatography. It has a formula weight of 79.06 g/mol. How much would you use to make 2 L of a 5 M solution
969 ml of gas was collected at 64 degrees celcius and a pressure of 723 mm Hg. Find the volume at STP.
An aqueous solution contains the amino acid glycine. Assuming that the acid does not ionize in water, calculate the molality of the solution if it freezes at -1.1 degree centigrade.
the Brackett series of hydrogen has a wavelength of 2626 nm. From what state did the electron originate
Using Thermodynamic data from your notes, calculate the change in Gibbs free energy for each of the following reactions using Gf's. In each case indicate whether the reaction is spontaneous under standard conditions.
the heat of fusion of a compound is 126 joules per gram. What is the total number of joules of heat that must be absorbed by 15.0- grams sample to change he compound from solid to liquid at its melting point?
In which one of the following species is the best Lewis structure a resonance structure. a. NH3 b. CO2 c. SF6 d. O2 e. CO32
The cuvette used had a 1.00 cm sample pathlength. The measured absorbance was 0.180. What was the concentration of hemoglobin in the solution
When acetic anhydride is dessolved in water it forms acetic acid according to the balanced chemical reaction. Calculate the theoretical yield (in grams of acetic acid, FW 60.05 g/mol) if 8.79mL of acetic anhydride
Compute the molecular formula of CH 3 COOH the percent composition of acetic acid is 39.99% C and 6.73% H. The remainder of the compound is oxygen.(The molar mass of acetic acid is 60.06 g/mol.)
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