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A student wished to determine the percent of acetic acid in commercial vinegar products. Brand X was selected. Three 20.0mL volumes were titrated with a 2.20mol.L sodium hydroxide solution until the indicator phenolphthalein turned pink. the density od acetic acid is 1049.2kg.m-3. the data gathered in the experiment is recorded below. Calculate the volume percent od acetic acid in vinegar.
Initial burette reading Vi= 0.00mL
Volume reading first trial titration V1= 8,82mL
Volume reading second titration V2= 16,84mL
Volume reading third titration V3= 24,08mL
Concentration of the NaOH 2.20mol.L
Volume of vinegar 20.0mL
Calculate an approximate delta_h in kilojoules for the industrial synthesis of ethyl alcohol from ethylene: C2H4(g) + H2O(g) -> C2H5OH
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The ratio of the number of atoms of the isotopes 69Ga and 71Ga in eight samples from different sources was measured in an effort to understand differences in reported values of the atomic mass of gallium
calculate the difference in mass that is hold by a 500.0mL flask at a temperature of 0.0°C from that at temperature of 20.0 °C? (you can assume the volume of the sample at 0.0 °C temperature =volume of the sample at 20.0°C)
If a reaction mixture contains only N2O and NO2 at partial pressures of 1.0 atm each, the reaction will be spontaneous until some NO forms in the mixture.
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