Calculate the band gap
Gallium arsenide is a common semiconductor. This material becomes a conductor when irradiated with infrared light whose frequency is 3.43 × 1014 s-1. Calculate the band gap of GaAs in kJ/mol.
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Briefly, explain how to make an acetic acid/ acetate buffer? Give the chemical reaction between this buffer and a small addition of base (OH-), which explains why the pH of the solution remains about the same?
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A KCl solution is prepared by dissolving 25.0 g KCl in 250.0 g of water at 25°C. What is the vapor pressure of the solution if the vapor pressure of water at 25°C is 23.76 mm Hg?
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At the boiling point of water,the Fahrenheit temperature is 112 degrees higher than the Celsius value. At the the freezing point the difference is only 32 degrees. At what temperature do both scales have the same reading?
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