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A very crude model of the buckminsterfullerene molecule (C60) is to treat it as a collection of electrons in a cube with sides of length equal to the mean diameter of the molecule (0.7nm). Suppose that only the pi electrons of the carbon atom contribute, and predict the wavelength of the first excitation of C60. (The actual value is 730 nm)
If the partial pressures of N2, O2 and NO at equilibrium are 1.5 atm, 2.5 atm and 0.75 atm respectively, what is the equilbrium constants
The concentration of Mg2+ in a sample of water is 262 mmol/L At what pH will 99% of the Mg2+ be precipitated as Mg(OH)2? Ksp = 8.9 x 10-12
How many moles of NaOH are needed to raise the pH of a 4.50 L tank containing 0.00100 M HCl solution to 3.50?
If 18mL of oxygen are collected over water at 27 degrees Celcius and 740 mm Hg of pressure, what volume will the dry gas have at STP?(The vapor pressure of water at 27 degrees celcius is 26.7 mm Hg)
if 69.5 kj of heat is applied to a 1012-g block metal, the temperature of the metal increased by 11.4 degrees celsius. what is the specific heat gravity?
The mass of a golf ball is 45.9 g. If it leaves the tee with a speed of 78.0 m/s, what is its corresponding wavelength?
calculate the energy in joules and calories. required to heat 5.25g of water, from 55 C to 64.8 C
Determine why would the P have been higher or lower if the H 2 O had been at pH 5?
what volume of 420 ml of hydrogen occupy if the temperature is raised from 0 C to 95 C?
Draw the Lewis dot structure for the following molecules. Use VSEPR theory to predict three-dimensional structure. Then predict whether the molecule is polar or non polar.
calculate the pH of pure water at 298 K and 403 K. Recall that pH is defined in terms of activity not concentration.
Calculate the number of moles of H2O that will be produced by the reaction of .530 moles of solid Al(OH)3 with excess aqueous HClO3
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