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It is given that the mobility of free electrons and holes in pure germanium are 0.38 and 0.18 m2/V-s. Find the intrinsic conductivity for germanium. (Assuming ni = 2.5x 1019/m3 at room temperature.)
Use the relation = q.ni ( µn + µp)s
Gaseous butane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 49. g of butane is mixed with 150. g of oxygen. Calculate the maximum mass of water that could be produced by the chemical reaction.
Carbon dioxide has an enthalpy of sublimation of 25.2 kJ/mol at -78 OC. If 0.975 kg of dry ice is placed into a bowl open to the atmosphere (i.e., constant pressure), what is the entropy of sublimation at this temperature
Consider a piece of gold jewelry that weighs 9.78 g and has a volume of 0.680 cm3. The jewelry contains only gold and silver, which have densities of 19.3 g/cm3 and 10.5 g/cm3, respectively.
predict whether a reaction will occur in each of the following. if so write the balanced chemical equation as well as the net ionic equation. Phases are all required for all species.
propose a synthesis of teflon (polytetraflauroethlene). What starting materials are required? What type pf reaction would be used to achieve polymerization
A system that had work done on it but which receives or loses no heat from or to the surroundings has positive work or negative work; positive or negative delta E
explain the steriochemisty of gyceraldehyde and glycerol give reasons for absence of anomeric forms in sucrose.1. in
EDTA is utilized to slow microbial degradation of mayonnaise by preventing bacterial uptake of iron. Assuming that mayonnaise has a pH of 3.9 and a total iron content of 10-6 mole/liter, how much EDTA must be added to complex 99% of the total Fe
A 739 mL gas sample at STP is compressed to a volume of 244 mL, and the temperature is increased to 24 ? C. What is the new pressure of the gas in Pa? Answer in units of Pa.
A 952 cm3 container of gas is exerting a pressure of 108 kPa while at a temperature of 48 oC. Calculate the pressure of this same amount of gas in a 1236 cm3 container at a temperature of 64 oC
if 2.3g of sodium reacted with 1.3g of water,what would be the total mass of sodium hydroxide and hydrogen produce?
In the laboratory you are asked to make a 0.648 m cobalt (II) bromide solution using 350 grams of water. How many grams of cobalt (II)
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