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Germanium is an example of an intrinsic semiconductor. However, it is sometimes doped to form an n-type semiconductor. Explain the difference between an intrinsic and an n-type semiconductor. Suggest an element that might be added to germanium to create the n-type semiconductor.
Calculate the concentration of OH- ion remaining in solution. Calculate the concentration of Sr+ ion remaining in solution. Calculate the concentration of NO3- ion remaining in solution.
A Be3+ ion emitts a photon with a frequency of 4.68 × 1016 Hz. If the energy of the initial state of the Be3+ ion was -3.88 × 10(-18) J, calculate the energy of the final state. Express answer in scientific notation.
A solution is prepared by condensing 4.00L of a gas, measured at 27°C and 746mmHg pressure into 58.0g of benzene. Calculate the freezing point of this solution.
In the acid-catalyzed dehydration of alcohols, an alkene and water are the reactions products. What method of separation has been used in order to collect samples
A patient needs to take 625 mg of ibuprofen twice daily. The pills in the bottle are each 250. mg. How many pills does the patient need to take each time she wants the 625 mg dosage? Assume that these pills are scored and can be cut in half if ne..
You mix 50 ml of a weak monoprotic acid with 50 ml of NaOH solution in a coffee cup calorimeter. Both solutions and the calorimeter were initially at 22 C.
A student weighed out 0.1225 g of the unknown copper bromide salt and carried out a titration like the one you performed in week 4. If the sample required 17.00 mL of 0.03525 M thiosulfate solution to reach the endpoint, what is the percent by ma..
Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1 degrees C. At what temperature does benzene boil when the external pressure is 490?
A 1.80 M solution of 56 ml is diluted to a volume of 218 milliliters a portion of that solution of 109 milliliters is diluted using 149 milliliters of H2O. determine the final concentration of this solution
what is the ph solution obtained by mixing 25.00 ml of 0.250 ml HCl and 25.00ml of 0.125M NaOH
The observed rate constant(k-observed) for one of the trials was measured to be 0.00400 s^-1. If the concentration of hypochlorite was fixed at 0.134 M, calculate the specific rate constant (k) for the trail.
Calculate how much heat is released when this reactions occurs at a constant temperature of 25.00 degree Celicus in a constant-volume container.
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