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A 11.5 g sample of an aqueous solution of hydroiodic acid contains an unknown amount of the acid.
If 23.3 mL of 0.374 M barium hydroxide are required to neutralize the hydroiodic acid, what is the percent by mass of hydroiodic acid in the mixture?
What is the pH of a solution that is 6.5×10-2M in potassium propionate and 8.5×10-2M in propionic acid?
A student must prepare 5.00 L of 0.100 M Na2CO3 (106 g/mol). Which is the best procedure for preparing this solution?
The oxidation of 748g of ammonium with 740g of Oxygen produces water and nitrogenoxide. Draw a chemical spread sheet to show what happens during a chemical reaction.
2-bromooctane in 10 mL ether solution gave an observed rotation of -1.8° in a 10 cm cell at 20°C. Calculate the specific rotation of this solution.
Calculate delta U of a gas for a process in which the gas absorbs 3 J of heat and does 10 J of work by expanding
The characteristic odor of pineapple is because of ethyl butyrate a compound containing carbon, hydrogen, and oxygen. Combustion of 1.39mg of ethyl butyrate produces 1.29mg of H2O and 3.16mg of CO2. Explain what is the empirical formula of the com..
Draw the principal organic product expected when 2-methylthiophene reacts with HNO3. Show minimized formal charges, if applicable.
Did all of the powder dissolve. if not how much powder remains undissolved. If so, how much more powder can be dissolved before a saturated solution is reached.
When the flask is allowed to cool the vapor condenses and aire again refulls the flask. Re weighing the flask and figure out the the wight of the unknown vapor which filled the flask during the boiling. Explain why it is not necessary to know the w..
Benzene (l) has a vapor pressure of 0.1269 bar at 298.15 K and an enthalpy of vaporization of 30.72kJmol^-1. The Cpm of the vapor and liquid phases at that temperature are 82.4 and 136.0 J K^-1 mol^-1, respectively. Calculate the vapor pressure of..
A gas is compressed from initial volume of 5.60L to 1.23L by an external pressure of 1.00atm. During the compression the gas releases 128J of hear. What is the internal energy of the gas?
A 25.0 mL sample of 0.400 M NH3(aq) is titrated with 0.400 M HCl(aq). What is the pH at the equivalence point. (Kb of NH3 = 1.8 ´ 10-5)
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