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Consider Si uniformly doped with 1015 cm23 boron atoms.
(a) What are the carrier concentrations at 27°C?
(b) What are the carrier concentrations at 100°C?
(c) If 1 1016/cm3 2 phosphorous atoms are added, what are the approximate equilibrium electron and hole concentrations at 27°C?
Question- At 298 K and 1 atm, gas A travels an average velocity of 444 m/s. At the same conditions, gas B travels 274 m/s. Part 1 Which gas has a larger molecular weight, A or B
Calcein indicator is added to the solution. The sample then requires 10.00 mL of 0.0120 M EDTA for titration. Calculate for this sample (a) the molarity of the calcium present, (b), the molarity of the magnesium present, and (c) the total hardness..
A sample of a fluorocarbon gas was allowed to expand to twice its volume. In this reversible, adiabatic expansion, the temperature dropped from 298.15K to 248.44K. assuming the gas acts ideally during the expansion, estimate Cv for one mole
Ammonium hydrogen sulfide decomposes on heating NH4HS(s) NH3(g) + H2S(g) If Kp for this reaction is 0.11 at 298 kelvins (with pressures in atmospheres)
the manager of a small chemical plant receives an order for 2000 kg of a 30 solution by weight of phosphoric acid in
Question- By measuring the osmotic pressure of a polymer solution one can determine the average molecular weight of a polymer. A 0.1455 g sample of polystyrene was dissolved in chloroform using a 10 mL volumetric flask.
the energy required to melt 1.00 g of ice at 0 degrees celcius is 333 j. if one ice cube has a mass of 62.0 g and a
Aspirin (acetylsalicylic acid) is a weak monoprotic acid. To determine its acid-dissociation constant, a student dissolved 2.00 g of aspirin in 0.600 L of water and measured the ph . What was the ka value calculated by the student if the ph of the..
The oxide of 'N' element contains 33.33% of the element .The same element forms a chloride whose Vapour density is 59.25.
Nitrogen gas when combined with hydrogen gas forms ammonia gas according to the following equation N2(g) + 3H2(g) = 2NH3(g). Delta H(rxn)=-56 kJ. The delta H(rxn) was determined using Hess's Law and the following three related reactions:
The air pollutant NO is produced in automobile engines because of the high-temperature reaction below. If the initial concentrations of N2 and O2 at 1000 K are both 1 M, what are the concentrations of NO, N2, and O2
electronic transition in a hydrogen atom has a wavelength of 486.2 nm. From what initial energy level (ni) did the electron transition?
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