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During photosynthesis, an electron is believed to travel 25 Angstroms within one picoseconds. The uncertainty in time measurement is 0.5ps. Given the speed at which the electron is traveling and the short distance, this may seem as a violation of the Uncertainty Principle. Calculate the uncertainty in the distance of the electron (in Angstroms) at any point during its 25 Angstrom journey.
Calculate the volume of .100 M NaOH needed to titrate 25 mL of store bought vinegar
Determine the molarity of Ni in the 20.0 mL solution. Determine the mass in grams of Ni in the original sample. Determine the weight percent of Ni in the sample.
a student calculates the density of iron as 5.72 gcm3 by using lab data for mass and volume. a handbook reveals that
Both anthracene and phenanthrene will undergo addition with Br2. Anthracene adds Br2 at the 9- and 10-position. Is this consistent with the MO(s) shown in the SHMO program?
How many grams of caffeine (C8H10N4O2) are present in one cup of coffee that contains 8.98 × 1021 caffeine molecules?
Menthol, the substance we can smell in mentholated cough drops, is composed of C, H, and O. A 0.1307?mg sample of menthol is combusted, producing 0.3678mg of CO2 and 0.1507mg of H2O.
Four kg of steam in a piston/cylinder device at 400kpa and 175C (448.15) undergoes a mechanically reversible, isothermal compression to a final pressure
The solubility product Ksp for silver iodide is 1.5X10%u221216 at 298K. calculate the osmotic pressure of a saturated aqueous solution of silver iodide at this temp. you may assume that the solution behaves ideally.
how many moles of hcl need to be added to 15.0 ml of 0.50 m naz to have a solution with a ph of 6.50? ka of hz is
Calculate the radiation dosage (in grays) for an 85-kg person that is exposed for 7.0 seconds to a 3.0 Ci source of beta radiation. Assume that 100% of the radiation is absorbed and each beta particle has an energy of 1.7× 10-13 J.
so3 can be produced in the following two-step processfes2 o2 ---gt fe2o3 so2 s02 o2 ----gt so3assuming that all the
at a particular temperature and a0 2.57 10-3 m concentration versus time data were collected for this reaction and a
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