Draw a rough energy band
In what type of material is the energy gap between the valence and the conduction band the greatest? Na, Ge or diamond. Draw a rough energy band showing the valence and conduction bands in these materials.
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Calculate the pH of the solution made by adding 0.50 mol of HObr in 0.30 mol of KOBr to 1.00 L of water. The value of Ka for HObr is 2.0 * 10^-9
If someone ate 6259 mL of snow, how much water would they have consumed? How many kJ would be required to bring it to body temperature?
Any help on how to do or start this problem? Suppose the gas above the soda in a bottle of a soft drink is pure CO2 at a pressure of 2 atm. a. Estimate the pH of the soda. b. Calculate CT, the total dissolved inorganic carbon.
What is the partial pressure of carbon dioxide in a container that contains 7.64 mol of oxygen, 1.68 mol of nitrogen, and 1.42 mol of carbon dioxide when the total pressure is 529 mmHg?
What quantity of useful work can be obtained when Mg is added directly to the beaker of HCl. How can you harness this reaction to do useful work
How many moles of methane would need to be reacted in order to heat 4.00 kg (~ 1 gallon) of water (Cs = 4.18 J/g-K) from room temperature (25° C) to boiling (100° C)?
An ideal-gas reaction mixture is in a constant-temperature bath. State whether each of the following will change the value of K°p (a) addition of a reactant (b) addition of an inert gas (c) change in pressure for a reaction with ?n does not eq
A sample of KClO3 was heated and 350. mL of O2 was collected over water. What mass of O2 was collected? Room T = 23°C, P =675. mmHg.
If the standard enthalpy of combustion of octane, C8H18(l), at 298 K is -5471 kJ x mol-1, calculate the standard enthalpy of formation of octane. The standard enthalpies of formation of carbon dioxide and liquid water are -393.51 and -285.83 kJ x
Using enthalpies of formation, calculate the quantity of heat produced when 10.0 g of propane is completely combusted in air under standard conditions. Assume that liquid water is forming. Express your answer using four significant figures.
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