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Benzoic acid is a weak acid that has antimicrobial properties. Its sodium salt, sodium benzoate, is a preservative found in foods, medications, and personal hygiene products. Benzoic acid dissociates in water: C6H5COOH<->C6H5COO- + H+The pKa of this reaction is 4.2. In a 0.75 M solution of benzoic acid, what percentage of the molecules are ionized? In what unit?
Octane has a density of 0.692 g/mL at 20 C. How many grams of O_2 are required to burn 1.50 gal of C_8H_18?
How do you rationalize the ordering of the following pairs in the spectrochemical series
A solution was prepared by dissolving 10.12g of KCl.MgCl2 (277.85g/mol) in a sufficient water to give 2L. Calculate a.) the molar analytical concentration KCl. MgCl2 in this solution
Vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in solution?
Reaction of an Alcohol to Produce an Alkyl Halide, N-butanol reacts with NaBr and H2SO4 to produce n-butyl bromide, via refluxation reaction in a lab experiment.
110 micro mol of 206^Pb. Assuming that all the 206^Pb comes from decay of the 238^U, estimate the rocks age (in yr).
Use the systematic treatment of equilibrium to determine the pH and concentrations of species in 1.00 L of solution containing 0.070 mol lysine (HL), 0.055 mol aspartic acid (H2A), and 0.0080 mol NaOH. Consider just acid-base chemistry.
The pressure in the stages is such that 8% by mass of the water entering the stage evaporates and leaves as fresh water. If the desalination plant wants to produce 1400.0 gallons of drinking water per day, how many gallons of brine must the plant ..
An organic compound X contains C, H, and O. A 16.69 g sample of X underwent combustion analysis, leading to the production of 44.71 g CO2 and 10.99 g H2O. What is the emperical formula of the compound?
suppose a 5.00 L sample of diatomic oxygen at a given temperature and preesure contains 1.08x10^23 molecules. How many molecules would be contained in 5.00L of hydrogen?
What volume of ethylene glycol (C2H6O2), a nonelectrolyte, must be added to 12.7 L of water to produce an antifreeze solution with a freezing point of -34.6°C? (The density of ethylene glycol is 1.11 g/cm3, and the density of water is 1.00 g/cm3.)
What mass of gold is produced when 5.90 A of a current are passed through a gold solution for 16.0 min?
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