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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.
A certain substance has a molar heat of vaporization of 31.6 kj/mol. How much of the sunstance is in a sample that requires 57 kj to vaporize.
Which of the following is (are) formed in the reaction between propyl hexanoate and methylamine. (must select all products which are formed in this reaction)
How many mL of 0.0221 M KMnO4 would it take to titrate a 0.5255 g sample of K3Fe(Ox)3? How could the results of your titration be used to determine if the sample was actually a mixture of K3Fe(Ox)3 and K4Fe(Ox)3
how much heat does your body lose when 2.5 grams of sweat evaporates from your skin at the temperature of 298k? assume
What are the two pKa values for carbonic acid? What is the pH of a 0.100M solution of potassium bicarbonate. What is the pH of a 0.100M solution of potassium carbonate
Water with an alkalinity of 2.00 X 10^-3 equivalents/L has a pH of 7.00. Calculate [CO2], [HCO3-], [CO3^2-], and [OH-].
When N2O5 (g) is heated it dissociates into N2O3 (g) and O2(g) according to the following reaction: N2O5(g) N2O3(g) + O2(g) Kc= 7.75 at a given temperature. The N2O3(g) dissociates to give N2O(g) and O2(g) according the following reaction:
Calculate the ph when 47.0 mL of 0.309 M of a certain monoprotic weak acid, HA, is mixted with 47.0 mL of 0.309 M of sodium hydroxide solution
a solution containing 0.5000 moles of acetic acid per liter to 400.0 mL of 0.3000 M NaOH. What is the final pH? The Ka of acetic acid is 1.77*10-5.
nbspthe density of diamond is 3.63 gcm3 and the density of lead is 11.0 gcm3. if equal masses of diamond and lead are
Based on formal charges, which statement about the best Lewis structure of a molecule composed of one atom each of N, S, and Cl
The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 295 mL measured at 1.00 atm. Calculate the number of grams of sodium used in the reaction. (Vapor pressure of water at 25°C = 0.0313 atm.)
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