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Benzoic acid (c6h5co2h=HBz) solutions are sometimes used in experiments to determine the molarity of a basic solution of unknown concentration. what is the pH of a 0.100M solution of benzoic acid if ka=6.5x10-5 and the equilibrium equation of interest is : HBz(aq)+h20(l)<--->h3O+(aq)+Bz-(aq).
The bond dissociation energy of Br2(g) is 193 kJ/mol, and the electron affinity of bromine is -325 kJ/mol. The enthalpy of vaporization of Br2 (l) is 31 kJ/mol. The lattice energy of KBr is -682 kJ/mol. Calculate the overall enthalpy change for th..
A microwave oven operates at 2.00GHz . What is the wavelength of the radiation produced by this appliance. Express the wavelength numerically in nanometers.
The vapor pressure of dichloromethane,CH2Cl2, at 0 C is 134 mmHg. The normal boiling point of dichloromethane is 40 C. Calculate its molar heat of vaporization.
If He(g) has an average kinetic energy of 6410 J/mol under certain conditions, what is the root mean square speed of Cl2(g) molecules under the same conditions?
Ephedrine was once used in diet pills that could be purchased without a prescription. Ephedrine is composed of 72.7% C, 9.15% H, 8.49% N, and 9.68% O. What is the empirical formula for ephedrine
the thermal equilibrium temperature of the metal sample plus water mixture is 24.6 *C. what is the specific heat of the metal?
c2h6g o2g co2g h2oga consider the unbalanced equation above. how many grams of o2 are required to react with 13.0 g
The reaction for the decomposition of dinitrogen pentoxide to form nitrogen dioxide and oxygen gas has the rate constant 1.7 x 10-3 s-1. This is a first order reaction.
A 15ml aliquot of this solution was the diluted to 500ml of water. Calculate the final molarity
Consider a reaction of the type aA--->products in which the rate law is found to be rate=k(A)3 If the first half of the reaction is found to be 40 seconds what is the time for the second half life
start with 4-cyclopentylphenol and react with NaOH, CH3I, NBS, heat show each step to get the final product.
What is the pressure (in atm) inside a container of gas connected to a mercury filled open-end manometer when the level in the arm connected to the container is 28.3cm higher than the level in the arm open to the atmosphere,
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