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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
Determine what would be the total ?nal pressure of the system in atmospheres If we completely hydrolyzed 0.18 kg of H2O in a 8.2 L container at 300 K?
Determine the molar concentration of chloride ions after adding 225 ml of 0.625 MKCL with 615 ml of 0.385M MgCl2 if final volume of the solution is 840ml.
Calculate how many grams of phosphorus are present in 2.68 moles of phosphorus pentachloride(PCl5) and also determine the numbers of moles of chlorine are present in 3.71 grams of phosphorus pentachloride?
Compute pH and [OH-] for each of the following solutions. (a) 8.1×10-2M Na2CO3, (b) 0.15M NaCN
Identifying and balancing the different types of chemical reactions. Evaluate which processes represent chemical reactions.
A rock contain 3.2 grams of a radioactive isotope, uranium-235, . Determine what was the original amount of uranium-235 in the rock If the rock has undergone 2.75 half lives, and how old is the rock?
A particular diatomic molecule which contains H exhibits a 16.95 cm^-1 spacing between its rotational lines and bond length of 141.5 picometers. Determine the mass (in amu) of the unknown atom in the molecule.
1) Draw all aldehyde and ketone isomers of C 6 H 12 O. 2) What is the reaction that occurs with hexanal and propanol (give both the hemiacetal and acetal products)?
Compute the solubility of CO 2 in H 2 O at 25 oC in moles/L if the partial pressure of CO 2 in the headspace water sample is 1.56 atm.
If a sample of sodium is dropped into a container of water the reaction is:
Calculate how many joules are needed to heat and calculate the theoretical volumes of 1.0 M Tris base?
Calculate the pressure difference between CH4 and an ideal gas under these conditions. The van der Waals constants for CH 4 are a=2.300L2⋅atm/mol2 and b=0.0430 L/mol.
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