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A velocity selector in a mass spectrometer, like that shown in Figure 21.39, uses a 0.130 T magnetic field. (a) What electric field strength is needed to select a speed of 4.50 106 m/s? (b) What is the voltage between the plates if they are separated by 1.00 cm?
draw a representation for TPCP that would represent its structure if the phenyls were perpendicular to the 5-membered ring (a paddle-wheel structure) and a representation that represents the propeller structure.
How do you write and balance this chemical equation a mixture of benzoic acid (C7H6O2 or C6H5COOH) and 4-t-butylphenol (CH3)3CC6H4OH
The ion is stabilized due to the delocalization of the positive charge to the aromatic ring. Draw resonance structures that indicate the stability of this ion.
What products result from the addition of aqueous solutions of F_e (C_2 H_3 O_2 )_2 (aq)and N_a3 PO_4 (aq)?
Draw a titration curve for both of these peptides. Be sure to label the axes properly, indicate the pKa values, the equivalence points and the buffering regions.
95.0 mL of H_2O is initially at room temperature (22.0C). A chilled steel rod at 2.0C is placed in the water. If the final temperature of the system is 21.5C, what is the mass of the steel bar?
The Born-Haber cycle is a series of steps that represent the formation of an ionic compound from a metal and a nonmetal. For example, the steps in a Born-Haber cycle for the formation of NaCl(s) consist of sublimation of the metal Na atom
Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.
A current of 0.0100 A is passed through a solution of rhodium sulfate, causing reduction of the metal ion to the metal. After 3.00 h, 0.038 g of Rh has been deposited. What is the charge on the rhodium ion, Rhn+? What is the formula for rhodium su..
An organic substance has an enthalpy of vaporization of 29.0 kJ/mol. The compound has a vapor pressure of 524 mm Hg at 25 °C. At what temperature is the vapor pressure equal to 115 mm Hg?
The solubility of O2 in water is 6.5 mg/L at an atmospheric pressure of 1.0 atm and temperature of 40 degrees C. Calculate the Henry's Law constant of O2 at 40 degree C. The mole fraction of O2 in air is .209
The density of a 16.0 mass % solution of sulfuric acid in water is 1.1094{g/mL} at 25.0 degrees celcius.
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