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Benzoic Acid (C7H6O2) burns in oxygen to form carbon dioxide and water. The dHcombustion of the reaction is measured to be -3225 kJ/m of Benzoic Acid burned. In an experiment, a Bomb Calorimeter is charged with 0.2568g of Benzoic Acid and excess oxygen. The calorimeter is placed in an insulated jacket containing 500.0g of water [Cp(water)= 4.18 J/g°C]. The reaction is run, and the temperature of the calorimeter and its surroundings is found to increase from 22.08°C to 24.34°C.
What mass of oxygen should be placed in the calorimeter? Assume that a 10-fold excess of Oxygen is used to ensure complete reaction.
How much energy is released by the experiment?
Assuming that all of the energy released by the experiment is used to heat the calorimeter and the water, determine the Calorimeter Constant of the calorimeter in J/g°C.
No desiccator is available. The sodium carbonate is cooled to room temperature, but the humidity in the room is high. how will this affect the reported molar concentration of the hydrochloric acid
Gaseous hydrogen iodide is placed in a closed container at 425 degree celcius, where it partially decomposes to hydrogen and idine: 2HI(g)--->--->H2(g)+I2(g). At equilibrium it is found that (HI)=3.53*10^-3 M,(H2)=4.79*10^-4M, and (I2)=4.79*10^-4M..
An experiment requires 44.0 of ethylene glycol, a liquid whose density is 1.114 . Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder. What volume of the liquid should he use?
1.write a balanced equation for the reaction of copper with concentrated nitric acid to form copperii nitrate. assume
Lewis Bases given their lone pairs on the central atoms, however, none of them actually are. Why are OF2 and SF4 are strong Lewis Acids and not Lewis Bases
A solution is made by dissolving 0.100 mols of NaOCl in 100.0 mL of water. The Ka of hypochlorous acid (HClO) is 3.0*10^-8 at 25.0 degrees C.
Explain why chemistry is such an important part of the study of Anatomy and Physiology. Please be sure to include specific examples of important chemical reactions as evidence of chemistry's importance to homeostasis.
How many grams of Na3PO4 is needed to produce 575mL of a solution that has a concentration of Na+ ions of 1.50M?
What are the likely ground-state electron configurations of the following anions? Se2-, N-3
The Group 5A elements N,P,As have lower (less negative) electron affinities than most of the Group 4A or Group 6A elements because N,P,As have half-filled subshells.
When 6.40 g of CH3OH was mixed with 10.2 g of O2 and ignited, 7.50 g of CO2 was obtained. What was the percentage yield of CO2?
An industrial chemist 2.00 moles each of h2 and co2 in a 2.00 L container at constant temperature of 800 degree celcuis. this reaction occurs:
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