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1. The first equivalence point for the titration a weak acid is reached when a volume of 26.80mL of NaOH has been added. If the pH of the solution is 4.45 after 13.40 mL of the NaOH has been added, what is the Ka for the acid
2. The first equivalence point for the titration of 0.2567 grams of a weak acid is reached when a volume of 26.80mL of 0.0510 M NaOH(aq) has been added. What is the molar mass of the acid?
Calculate the molarity of a solution of glycerol made by dissolving 53.000 mL glycerol at 15 'C in enough water to make 270.00 mL of solution.
A car travels at 58.0 miles per hour and gets 12.0 kilometers per liter of gasoline. How many gallons of gasoline are needed for a 1.50 hour trip?
A stock solution is prepared by adding 22 mL of 1 M Na3PO4 to enough water to make 73 mL. What is the PO43- concentration of 30 mL of the stock solution?
Ether usually known as Ethoxyethane, is often used to extract organic compounds from aqueous solution. Which of its properties A does notfavour its selection for this use?
A gas sample containing 1.35 mol at 25°C exerts a pressure of 405 torr. Some gas is added to the same container, and the temperature is increased to 50.°C. If the pressure increases to 800. torr, how many moles of gas were added to the container?
What mass of sucrose should be combined with 467 g of water to make a solution with an osmotic pressure of 8.30 atm at 300 K? (Assume the density of the solution to be equal to the density of the solvent.)
Calculate the molar solubility of Mg(OII)_2 in a solution with a pH of 12.8 (K_op of Mg(OH)^2 is 1.2 * 10^-11
Why the temperature of the DSC experiment settings need to be determined via TGA
What type of bonding between amino acid residues is most important in holding a protein and polypeptide in a specific secondary configuration?
aluminum and oxygen react to form aluminum oxide. How many L of oxygen at 296K and 1.4 atm of pressure are necessary to form 3.25g of aluminum oxide.
The normale boling point of acetone is 56.2 C and its Hvap is 25.5kJ mol. At what temperature does acetone have a vapor pressure of 425mmHg?
If the temperature in the laboratory is 22.7oC and the atmospheric pressure is 0.966 atm, what volume would be occupied by the carbon dioxide produced in this reaction (in cm3)?
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