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Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. The osmotic pressures required for this process can be as high as 18.1 atm.
Based on the trends in ionization energies for the alkali metals which would you expect to undergo the most exothermic reaction with chlorine gas? Write a balanced chemical equation for the reactio
A two-component mixture is analyzed by gas chromatography with flame ionization detection. Compound X has a retention time of tR = 5.83 min with N = 7080 theoretical plates, and compound Y has a ret
Aspartame is an artificial sweetener that is 160 times sweeter than sucrose (table sugar) when dissolved in water. It is marketed as Nutra-Sweet. The molecular formula of aspartame is C14H18N2O5.
How many silicon atoms are there in 1cm^3 of material? Suppose you dope that 1-cm^3 sample of silicon with 1ppm of phosphorus that will increase the conductivity by a factor of a million. How many m
Dinitrogen pentoxide N2O5 is a solid with a high vapor preassure. Its vapor pressure at 7.5 degrees C is 100mmHg, and the solid soblimes at a pressure of 1.00 atm at 32.4 degrees C.
A 25.00-mL sample of propionic acid, HC3H5O2, of unknown concentration was titrated with 0.155 M KOH. The equivalence point was reached when 40.82 mL of base had been added.
One type of electromagnetic radiation has a frequency of 1.024 * 10^10 Hz, another type has a wavelength of 2.12 *10^(-10) m, and another type of electromagnetic radiation has photons with energy eq
Determine the oxidation state of rhodium, Rh, which is a brilliant plating for jewelry settings, from the following electrolysis data.
Nylon can be destroyed easily by strong acids. Explain the chemical basis for the destruction. (Hint: The products are the starting materials of the polymerization reaction.)
The titration of 25.0 mL of a vinegar sample with 0.500 M NaOH solution required 44.6 mL of NaOH. If we assume the density of the vinegar sample is 1.00 g/mL, what is the percent acetic acid in the
Substitution and elimination reactions are competing reactions. Under what conditions can you ensure that substitution will predominate and under what conditions can you ensure that elimination wil
A system is established by combining 50 grams of steam at 100 degrees Celsius with 320 grams of ice at 0 degrees Celsius. What is the temperature of this mixture when the system reaches equilibrium
What is the total amount of heat needed to convert a system containing 30 grams of ice at 0 degrees Celsius into steam at 100 degrees Celsius?
How much heat must be removed from a system containing 80 grams of water at 60 degrees Celsius in order to convert it to ice at 0 degrees Celsius?
Another wood sample prepared from an object recovered at an archaeological excavation gives a decay rate of 0.158 disintegration per second per gram of the sample. What is the age of the object?
Write a detailed mechanism for the above conversion. Assume a chain initiation where light cleaves the C-Br bond to make Cl3C• and Br• radicals. Then go from there.
A beaker with 185 of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 . A student adds 4.80 of a 0.350 solution
How much heat would be required to warm earths oceans by 1.0 degrees C? the volume of the earths oceans is 137 x 10 to the 7th power and km to the 3rd power.. the density is 1.03g/cm to the 3rd pow
The melting point of pure simazine is 225 - 227 °C. If the melting point of your product was different, what could be the explanation? What are possible causes for obtaining a low percent yield
A student spots an unknown sample on a TLC plate. After developing in hexanes/ ethyl acetate 50:50, he/she saw a single spot with an Rf of 0.55. Does this indicate that the unknown material is a pur
Determine the change in boiling point for 300.0 g of carbon disulfide (Kb= 2.34 degrees C kg/mol) if 35.0 g of a nonvolatile, nonionizing compound is dissolved in it.
A large balloon is initially filled to a volume of 25.0 L at 353 K and a pressure of 2575 mm Hg. What volume of gas will the balloon contain at 1.35 atm and 253 K?
Light of wavelength 589 nm falls on a photoelectric surface and electrons of maximum kinetic energy 0.21 eV are emitted. Find the work function and the cut-off frequency of the surface.
What are the least stable chair conformations of of 2-tert-butylcyclohexanol. i reviewed the stable ones, but the least stable ones are giving me problems.