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Use the Clausius-Clapeyron equation to calculate (a) Enthalpy of vaporization, (b) the normal boiling point, and (c) the enthalpy of vaporization at the boiling point.
An open vessel containing (a) wter, (b) benzene, (c) mercurystands in a laboratory measuring 5.0m*5.0m*3.0m at 25C. What mass of each substance will be found in the air if there is noventilation?
How does the entropy of the system change when (a) the temperature of the system increases, (b) the volume of a gas increases, (c)equal volumes of ethanol and water are mixed to form a solution.
By using Appendix C, calculate the minimum temperature at which this process will be spontaneous under standard conditions. Assume that ΔH and ΔS do not vary with temperature.
If the sodium hydroxide in the problem above is added to 50.00 mLof .118M Hydrochloric acid, how many mmoles of hydrochloric acidremain?
What is the color of the solution (assume stoichiometric amounts of nickel (II) chlorideand sodium phosphate). Explain.
How does l-glyceraldehyde differ fromd-glyceraldehyde? How does the structure of d-glucose compare to the structure of d-galactose?
It takes 16.6 min for a 10.0-mLsample of an unknown gas to effuse through a pinhole. A 10.0mL sample of helium, He, required 5.00min. What is the molecular weightof the unknown gas (in g/mol)?
If all of the energy from the decay of 40K in your body could be captured and converted into electricity, how many "radioactive"people would be required to power a 100 W light bulb? 40K isa b- emitt
Calculate the Chloride concentration of the resulting solution.When 20.0 mL of 0.100M of NaCl is mixed with 30.0 mL of 0.200M CaCl2? Assume that the volumes are additive.
If the sodium hydroxide in the problem above is added to 50.00 mLof .118M Hydrochloric acid, how many moles of hydrochloric acid remain?
An 80-proof brandy is 40.0% (v/v) ethyl alcohol. The "proof" is twice the percent concentration of alcohol in the beverage. How many milliliters of alcohol are present in 750mL of brandy?
Identities of the components in a mixture may be determined by atechnique called spiking. Suppose you had run a gas chromatogram onyour product and had then deliberately added a drop of a known samp
The radioactive isotope Iodine-123 (123I) is used inmedical diagnosis and treatment. A gamma ray emitted by an atom of123I has an energy of 0.159 MeV. (1 MeV is 1 x106 eV and 1 eV = 1.6022 x 10-1
Manganese has a body-centered cubic unit cell and has a densityof 4.68 g/cm3.From this information, determine the length of the edge of the cubic cell.
15.0 moles of gas are in a 8.00 tank at 20.2. Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are a=2.300 L^2* a
A chemist prepared a 0.244 M solution of fructose at250C. At equilibrium it was found that its concentration had decreased to 0.163 M. Calculate the equilibrium constant for the reaction.
A quantity of 0.20 mole of carbon dioxide was heated to acertain temperature with an excess of graphite in a close container until the following equilibrium was reached.
When 1.25 moles of Br2 are put in a 0.770-L flask,2.00 percent of the Br2 undergoes dissociation.Calculate the equilibrium constant Kc for the reaction.
X-ray diffraction from crystals provides one of the most accurate ways of determining the Avogadro's number. Silver crystallizes in a face-centered cubic lattice with all atoms at the lattice points
How many liters of Cl2 gas at STP are produced by the reaction of 30.0 mL of a 12.0 M solution of HCl? (That is,there are 12.0 mol HCl per liter of solution.) There is an excessof KMnO4. The re
Using the table of standard enthalpies, calculate the enthalpy of formation of methanol,CH3OH.Use the following chemical reaction
An aqueous solution at 25C has a H+ concentration of 4.0 x10-2 molar. What is the OH- concentration in the same solution in moles per liter?
Assume you could titrate to the third equivalence pt ofH3PO4. What would be the relationship of Volume at equivalence pt 3 to V equiv. 2 to V equiv. 1?
A solution with 0.10M of sodium propipnate, and another solution contains 0.12M hydrofluric acid and 0.10M sodium floride.Which of these solution is a buffer solution? State the reason PLZ?