What is the energy in joules of a mole of photons
What is the energy in joules of a mole of photons associated with red light of wavelength 7.00 ´ 102 nm (c = 3.0 x 108m/s; h = 6.63 x 10-34 J s; nA = 6.022 x 1023/mole)?
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In a portable oxygen system, the oxygen (O2) is contained in a cylinder whose volume is 0.0027 m3. A full cylinder has an absolute pressure of 1.9 107 Pa when the temperature is 300 K. Find the mass of oxygen in the cylinder.
Sketch the reaction energy diagram for this reaction. Compare the amounts of reactants and products that will be present when the system reaches equilibrium.
The radius of a xenon atom is 1.3×10-8cm. A 100-mL flask is filled with Xe at a pressure of 1.5atm and a temperature of 295K. Calculate the fraction of the volume that is occupied by Xe atoms.
A piece of metal weighs 50.0 n in air, 36.0 in water, and 41.0 in an unknown liquid. Find the densities of the metal and the inknown liquid
Estimate the number of electrons present in a (neutral) 1.0 block of carbon.
With the steady growth in attendance at Saturday home football games, Southwestern University's president, Dr. Joel Wisner, had reached a decision. The existing stadium, with seating capacity of 54,000, simply would not suffice. Forecasts show
Two charges separated by one meter exert 1-N forces on each other. If the charges are pulled to a 3-m separation distance what will the force on each charge be?
A hot 70 C lump of metal has a mass of 250g and a specific heat of 1.05 J/gC. the metal is dropped into a 500g calorimeter containing 75 g of water at 20 C the calorimeter has its own specific heat of .42 J/gC. Once the combination of metal, water
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