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It takes 46 J to raise the temperature of an 9.3 g piece of unknown metal from 13 oo? C to 24.7 C. What is the specific heat for the metal?
Calculate the pH at the equivalence point for the titration of 0.10 M HCl with 0.10 M NH3 (Kb = 1.8 x 10-5).
what is the molar mass of the protein? A solution of 7.50 mg of a small protein in 5.00 ml of aqueous solution has an osmotic pressure of 6.80 torr at 23.1 degrees celcius.
5 ml of a 0.002m solution of hcl is dissolved in 0.5 liters of water. what is the concentration of h3o ions in the
Calculate the pH of a solution containing .15 M acetic acid and .25 M sodium acetate. For acetic acid, Ka = 1.8 x10?-5. (Either as a buffer system or ICE table. NaOAc is strong electrolyte).
The indicator propyl red has Ka = 3.3 × 10-6. What would be the approximate pH range over which it would change color?
Calculate the vapor pressure of this solution at 25.0 degrees C. At this temperature, the vapor pressure of pure water is 23.8 mmHg.
the standard change in Gibbs free energy is ?G° = -32.8 kJ/mol. What is ?G for this reaction at 298 K when the partial pressures are P C2H6=0.100atm, P H2=0.100atm and P CH4=.750atm
Classify the following as Arrhenius, Bronsted-Lowry, or Lewis acid-base reactions. A reaction may fit all, two, one, or none of the categories. Cu^2+ + 4Cl- --> CuCl2^2-
Compute the change in internal energy of the following system a balloon is cooled by removing 0.652 kJ of heat. It shrinks on cooling as well as the atmosphere does 385 J of work on the balloon.
Ethanol has {rm mp} = -114.5 ^circ {rm C}, {rm bp} = 78.4 ^circ {rm C} , Delta H_{rm vap} = 38.56 {rm kJ/mol} and Delta H_{rm fusion} = 4.60 {rm kJ/mol}. The molar heat capacity is 113 {rm J / left( K cdot mol right)} for the liquid and 65.7 {rm J..
Iron (III) oxide(s) is heated in excess carbon monoxide(g) to form iron(s) and carbon dioxide(g). If the percent yield of iron was 83.0% and the actual yield was 9.87 g, how much iron (iii) oxide was used?
laws of thermodynamics. Why is there no law for the conservation of entropy?
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