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Optical fibers allow the fast transmission of vast amounts of data. In one type of fiber, the wavelength of transmitted light is 1.3 X 10^3nm. (a) What is the frequency of the light? (b) Fiber optic cable is available in 12 km lengths. How long, will it take for a signal to travel that distance assuming that the speed of light in the cable is the same as in a vacuum?
Calculate the potential of the cell. Indicate whether the reaction will proceed spontaneously in the direction considered (oxidation on the left, reduction on the right) or an external voltage source is needed to force this reaction to occur
The rate constant of a reaction is 2.75*10^-5 L/mol*s at 195 c and 3.75*10^-3 L/mol*s at 258 c. What is the activation energy of the reaction
A student standardized her I2 solution by preparing a solution of 0.0450 g of ascorbic acid (vitamin C) in a 100 mL volumetric flask. She titrated several 10.00 mL samples of the Vitamin C solution
A hypothetical metal has a face-centered cubic unit cell and a density of 6.12 g/cm3. The molar mass of the metal is 143.2 g/mol. What is the atomic radius of this metal?
Explain the characteristics of a single, double, and triple bonds including why they form
What volume (V) of 2.20 M NaOH solution must you add in order to prepare an acetate buffer of pH = 4.26? (The pKa of acetic acid is 4.76.)
smaller dipole moment than formaldehyde, H2C=O, even though it contains electronegative chorine atoms in place of hydrogen. Explain
what is the [H3O+] and the pH of a benzoic acid-benzoic buffer that consists of 0.15 M C6H5COOH and .47 M C6H5COONa? (Ka of benzoic acid = 6.3 * 10^-5)
Identify all of the spectator ions in the precipitation reaction below. Ca^2+ (aq) + 2Br^-(aq) + 2Li^+ (aq) + CO3^2- (aq) arrow to CaCO3 (s) + 2Li^+ (aq) + 2Br^- (aq)
Suppose you wanted to make a pH=4.25buffer. What would be the best acid/base system: acetic acid/acetate or lactic acid/lactate? THe Ka of lactic acid is 8.32x10(exponent -4). Throughly explain your reasoning.
In a formal sense, the conversion of a carboxylic acid to an amide corresponds to which of the following. the combining of the fragments which remain after the loss of -OH from the carboxylic acid and -H from ammonia or an amine
A 25.00 mL sample of the weak acid, propionic acid, HPr, of unknown concentration was titrated with 0.104 M KOH. The equivalence point was reached when 35.31 mL of base had been added. The concentration of the original HPr is
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