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1. A 125mL Erlenmeyer flask has a measured volume of 148 mL. A 0.477 g sample of an unknown vapor occupies the flask at 94.8°C and a pressure of 736 mmHg. Assume ideal gas behavior:
a. How many moles of vapor are present?
B.What is the molar mass of vapor?
Empirical and Molecular Formula of Cadaverine, Cadaverine, a substance produced by the action of bacteria on meat, contains 58.55% C , 13.81% H , and 27.40% N.
Write a mechanism for the formation of N-(2, 4-dinitrophenyl) aniline via nucleophilic aromatic substitution. Show all resonance forms that stabilize the intermediate in this reaction.
What is the rate constant of a first-order reaction that takes 367 seconds for the reactant concentration to drop to half of its initial value
the net change in entropy of the system and surroundings considered together must be a positive quantity; (e) the entropy of the universe must remain constant.
Consider the reaction 2ZnS + 3O2 → 2ZnO + 2SO2. Suppose that you wanted enough O2 to completely react with 500. g of ZnS. What mass of O2 should be present?
What is the minimum pH required to prevent the precipitation of SnS in a solution that is 0.0010 M Sn(NO3)2 and saturated with H2S (0.10 M)? (ksp = 1.0 x 10 ^-25 K1K2 = 1.3 x 10 ^-20)
we then titrated both the aqueous and organic layer. for organic layer, we used 0.1M (S2O3)2- for aqueous layer, we used 0.01M (S203)2- find concentration [I]2 (subscript 2) for aqueous and organic layer
Explain what is the mole fraction of solute and the molal concentration for an aqueous solution that is 10.0% NaOH by mass
Draw the structure of the carbocation intermediate leading to the formation of 3-methyl-1-butene. Use the (+) and (-) tools to adjust charges as necessary
Draw a diagram of the electrochemical cell, labeling all electrodes and solutions. (1B). What is the pH in the Pt | H+ | H2 half-cell? (1C). What is the value of the equilibrium constant for the reaction occurring in this cell
Approximately how many grams of monosodium succinate (FW = 140 g/mol; succinic acid pK2=5.64) and disodium succinate (FW = 162 g/mol) must be added to 1L of water to produce a solution with a pH 5.28 and a total solute concentration of 100 mM.
For the subsequent reactions, look up the delta Hf values to compute delta H rxn and S values to evaluate delta S system and hence compute delta S universe at 298 K.
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