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a) Calculate the smallest increment of energy that can be emitted orabsorbed at a wavelength of 10.8 mm?
b) What is the wavelength ofradiation that has a frequency of 7.8x10^10 s-1?
Phosphate buffer has 3 ionizable groups, with pKa's of 2.15, 7.2, and 12.45. A 1.20 M solution of this buffer (250 mL) is found to have a pH of 6.0. A biochemist adds 30 mL of 1.0 M NaOH to this buffer. What is the resultant pH?
Calculate the wavelength of the n=4 to n=1 and the n=4 to n=3 transitions. Indicate in which regions of the electromagnetic spectrum these transitions would occur.
a sample of propanec3h8 contains 11.7 moles of carbon atoms. how many total moles of atoms does the sample
Iron metal is coated wih nickel. Which of metals will undergo corrosion when coating is damaged? Give the scheme of electrochemical corrosion and write equations for the reactions
If a 78.1 mL of a solution of oxalic acid 8.38x10^22 carbon atoms, what is the concentration of H2C2O4 in the solution
Compare your answers with the following: the effective charges on H and Cl in the HCl molecule are +0.178 and -0.178. A. HBr has a smaller dipole moment and a longer bond length than HCl
What is the mass percent of NaCl in a solution obtained by mixing 50g of this solution with 215g of H2O?
describe how to prepare 2.0 liters of a .20 m naoh solution from 50. ww naoh solution that has a density of 1.53 gml
If the atmospheric pressure at 30 km is 28.0 torr and the temp is -48 C, what is the volume of the balloon when it bursts?
Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the minimum concentration of KOH required for precipitation to begin in each case.
Consider a solar with no dye where TiO2 is insted the light-absorbing species. the energy required to exite an electron in TiO2 is 3.21 eV. A. A) calculates the minimum wavelength of light required to excite an electron in TiO2.
How many moles of hydronium ion are neutralized by one teaspoonful of Extra strength Maalox plus?
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