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Semiconductors, such as silicon, are the heart of the circuits that form the basis for computers and other electronics. These materials are characterized by a gap in the energy, known as theband gap, between a filled valence band and an empty conduction band.
Given that an atom of a semiconductor has a diameter of 2.04Å , what is the maximum number of moles that fit in the channel of a processor chip that is 64.8nm long, 79.7nm , wide and 355nm thick? Assume that the atoms stack in a simple cubic arrangement.
A solid Silver Group (Anion) unknowon that contains only sodium ion as a catio is acidified and divided into tow portions, to both of which 6 M HC2H3O2
The vapor pressure of carbon tetrachloride, , is 0.354 and the vapor pressure of chloroform, , is 0.526 at 316 . A solution is prepared from equal masses of these two compounds at this temperature.
How much heat in is evolved or absorbed in the reaction of 2.28 grams of sodium ( Na) with water( H 2 O), express your answer in kilocalories?
what is heat of vaporization of a liquid that has a vapor pressure of 606 torr at 84 degrees celsius and a boiling point of 96.3 degrees celsius at 1 atm?
In what direction do the functions point? What orbitals are"left" unused on the C atom?
Calculate the final pressure of a gas if a 953-mL sample of the gas at 1.25 atm and 50.0 degrees Celsius is changed to 1.55 L at 75.0 degrees Celsius.Be sure to include units and correct significant figures
What volume of 0.140 M Hydrochloric acid is required to neutralize 2.68g of Magnesium hydroxide.
What is the molecular formula for the compound containing 30.4% nitrogen and 69.6% oxygen by mass and having a molar mass of 92.0 g?
A student's piece of galvanized metal had a mass of 42.73 grams before dipping it into the acid. Afterwards its mass was 42.22 grams. How many moles of zinc were removed? How many atoms is that?
osmium has a density of 22.6 g/cm3. what volume (in mL) would be occupied by a 21.8 g sample of osmium?
The half-equivalence point of a titration occurs half way to the end point, where half of the analyte has reacted to form its conjugate, and the other half still remains unreacted.
An aerosol spray can with a volume of 350. mL contains 2.29 g of propane gas (C3H8) as a propellant. (a) If the can is at 25°C, what is the pressure in the can? (b) What volume would the propane occupy at STP?
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