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A substance with a partition coefficient of 2.5 is extracted into an organic phase by successively using 5 equal volumes. If the initial aqueous solution initial aqueous solution was 50 mL, how much organic solvent (total) would be needed to extract 95% of the substance? Report your answer in mL.
A 391-rm mL sample of unknown rm HCl solution reacts completely with rm Na_2CO_3 to form 20.1 g rm CO_2. What was the concentration of the rm HCl solution?
If you start with 6.00 moles of C3H8 (propane) and 6.00 moles of O2, how many moles of carbon dioxide can be produced. C3H8(g) + 5O2(g) 3CO2(g) + 4H2O(g)
The partial pressure of C2H6 is 0.300 atm and that of CH2F2 is 0.250 atm. What is the total pressure and what is the Mole fraction of C2H6 in the mixture
Given the following half-cell reactions, write the overall reaction and calculate the standard reduction potential for the cell. Mn3O4 (s) + 4H2O (l) + 2e- ? 3Mn(OH)2 (s) + 2OH- (aq)Eo = 0.002 V
In an alternative analysis of spinach, a student adds the following to an extraction funnel: 50 mL ether, 50 mL water, 15 mL 0.1 M HCl, 0.25 g retinol (vitamin A), and 0.25 g glutamic acid, and proceeds to shake. Indicate the contents of phase A a..
what is the change in internal energy of the system?
The acid dissociation constants listed in the majority standard reference texts for carbonic acid actually apply to dissolve CO2. For a CO2 partial pressure of 8.7×10-4 bar in the atmosphere, explain what is the pH of water in equilibrium with the..
What is the heat of the reaction which forms 1.00 mole of gaseous monatomic bromine from 0.500 mole gaseous diatomic bromine.
A 3.140 molal solution of NaCl is prepared. How many grams of NaCl are present in a sample containing 2.678 kg of water?
Please review the occurrence and cycling of calcium in nature, along with its use. Analyze and evaluate the article as to it's contemporary relevance regarding the elements availability, health implications and environmental impact.
At what position will the electrophilic aromatic substitution occur for the following compounds? bromobenzene, nitrobenzene, benzoic acid, toluene, phenol, and benzaldehyde
Calculate the vapor pressure at 20?C of a solution containing 3.641 g of naphthalene in 22.7 g of chloroform (CHCl3). Naphthalene (C10H8) has a low vapor pressure and may be assumed to be nonvolatile. The vapor pressure of chloroform at 20?C is 15..
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