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If a 200mg piece of gold (density =19.32g/cm^3 ) is hammered into a sheet measuring 2.2 X 1.0 ft , what is the average thickness of the sheet in meters? Express your answer using two significant figures.
Calculate the concentrations of all species present [Na+], [C6H5CO2-], [C6H5CO2H], [H3O+] and [OH-] in 0.040M sodium benzoate
For the following reaction, Kc is 144 at 200 degrees C. If 0.400 mol of both A and B are placed in a 2.0 liter container at that temperature, what will the concentration of of C be at equilibrium
Check all that apply Water is important to life because: - it does not dissolve certain substances - it causes brownian motion - it is colorless and odorless
A space probe identifies a new element in a sample collected from an asteroid. Successive ionization energies (in attojoules per atom) for the new element are l1 = 0.507, l2 = 1.017, l3 = 4.108, l4 = 5.074, l5 = 6.147 l6 = 7.903, l7 = 8.294. To wh..
100. g of ice at 0deg is added to 300.0 g of waterat 60degc. assuming no transfer of heat to the surroundings what is
Calculate the vapor pressure of water, in torr, above a solution prepared by dissolving 65.40 g of ZnCl2 in 445.0 g of water at 323.0 K. The vapor pressure of pure water at 323.0 K is 92.50 torr.
Current annual energy consumption in the United States is 99.2 quads. Assume that all this energy is to be generated by burning CH4(g) in the form of natural gas. If the combustion of the were complete
What the Van der Waals Pressure of ethane gas at temperature of 500K and Molar Volume of 7.28 x 10^-5 m^3/mol?
The heat of solution of ammonium chloride is 15.2 kJ/mol. If a 6.253 g sample of NH4Cl is added to 65.0 mL of water in a calorimeter at 26.9°C.
Gaseous NOCl is placed in a closed container at 193 oC, where it partially decomposes to NO and Cl2: 2 NOCl(g) 2 NO(g) + 1 Cl2(g) At equilibrium it is found that p(NOCl) = 0.008460 atm, p(NO) = 0.007950 atm, and p(Cl2) = 0.004590 atm. What is the ..
what is the ph at the stoichiometric point end point for the titration of 50 ml of 0.20 m methyl amine ch3nh2 aq with
Calculate the entropy change for vaporization of 18 g of H2O. The molar enthalpy of vaporization for water is 44 kJ/mol and the boiling point
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