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What is the energy and frequency of the photon to raise the electron in a hydrpgen atom from the energy level n=2 to n=4?
Assume that all ethanol is transformed into CO2 and assume the lake contains 10^8 liters of water. Explain your answer with the chemical reaction involved and any assumptions you make.
What volume of Cl2 gas, measured at 682 torr and 40 degrees celcius, is required to form 26 g of NaCl ?
The concentration of a biomolecule inside a rod-shaped prokaryotic cell is 0.0031 M. Calculate the number of molecules inside the cell, which is 3.5 µm long and 1.4 µm in diameter.
Discuss the social, clinical and research applications of PCR. give one example of each category o application
Determine the time (in hours) required to recharge a Ni-Cd battery by converting 2.43 g Cd(OH)2 back to Cd using a charger that supplies 125 mA of current.
A saturated solution of this substance was made in 0.01 M KlO3. The copper concentration was found to be 0.0012M. Determine the [IO3^-] and the Ksp of the substance.
All living things contain carbon. Most of this carbon is stable carbon-12. However, a small percentage will be carbon-14, a radioactive isotope of carbon that decays with time
Draw a potential energy diagram that represents the three step mechanism for the reaction and label the reactants and products for the overall reaction. Assume the overall reaction is endothermic
what sort of interaction occurs between adjacent alcohol molecules? and what sort of interaction occurs between
the tss of a wastewater was determined using 30 ml of sample. the filter used originally weighed 0.4327 grams. after
What is the pH of a solution that contains 0.15 M HC2H3O2 and 0.28 M C2H3O2-. Use Kb = 5.6 x 10-10, for C2H3O2-. pH =
A solution is prepared by mixing 50.0 ml of 0.10 MPb(No3)2 with 50.0 mL of 1.0 M KCl. Calculate the concentrations of PB+2 and Cl- at equilibrium(ksp=1.6 times 10^-5)
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