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(a) Using standard enthalpies of formation, calculate the change in enthalpy for the following reaction: 2C6H6 + 15O2 = 12CO2 + 6H2O.
(b) How many grams of C6H6 must be combusted in the above reaction to produce 2570 kJ of heat energy?
Calculate the pH of the solution after the addition of 30ml of 0.1M NaOH. Show you work. Draw the structure of the form is His predominating in solution at neutral pH.
If Ka is 1.85 x 10^-5 for acetic acid, calculate the pH at one half the equivalence point and at the equivalence point for a titration of 50 mL of 0.100 M acetic acid with 0.100 M NaOH.
State the advantage and disadvantage of a furnace compared with a flame in atomic absorption spectroscopy
Determine how much silver ion(Ag+) is left in solution if you mix 0.10 mole of silver nitrate AgNO3 with 0.20 mole of sodium hydroxide NaOH to make a one litre solution.
Draw a band diagram for thermal/photo (Intrinsic) and doped (Extrinsic) semiconductors and explain the origin of semiconductivity.
We have learned that valence bond theory helps us to predict s and p bonding in molecules. All of the following statements about molecular bonding are true, but which statement best summarizes the most basic premise for bonding in a molecule?
What is the buffer component ratio, ([CH3CH2COO-]/[CH3CH2COOH]) of a propanoate buffer that has a pH of 4.49. Ka of CH3CH2COOH is 1.3 x 10-5.
A hydrochloric acid solution is standardized using 0.500 g of sodium carbonate, Na2CO3.Find the molarity of the acid if 29.50mL are required to reach a phenolphthalein
Determine the number of bonding electrons and the number non-bonding electrons
Calculate the volume of dry CO2 produced at body temperature (37°C) and 0.966 atm when 26.0 g of glucose is consumed in this reaction.
How much energy in kilojoules is required to convert 260 mL of water at its boiling point from liquid to vapor.
The ozone layer is about 20 km thick, has an average total pressureof 10 mm Hg(1.3 * 10^-2 atm ) , and has an average temperature of 230 K. The partial pressure of ozone in the layer is only about 1.2 * 10^-6 mm Hg( 1.6 * 10^-9 atm ).
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