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What is the calibration factor of a calorimeter if a current of 1.20 A at a potential difference of 5.67 V raises its temperature by 1.25°C in 60.0 seconds. Calculate the energy input, using E = VIt.
Why can K2CO3 convert acetaminophen to phenacetin, when K2CO3 is a weak base. Williamson ether synthesis for aliphatic molecules usually requires a strong base, such as sodium ethoxide.
Calculate the heat released when 25.0 g of water at 0 degrees C crystallizes to ice at the same temp. The specific heat of water is 1.00 cal/(g *degrees C); the heat of fusion is 80.0 cal/g and the heat of vaporization is 540.0 cal/g
Estimate the value of the equilibrium constant at 685 K for each of the following reactions. Delta H and S for BrCl(g) is 14.6 kJ/mol and 240.0 J/ mol * K, respectively. 2 NO_2(g) > N_2O_4(g.
Outline the steps necessary to properly prepare 100ml of TE buffer. Include the amounts of Tris-base and EDTA, and all steps necessary to adjust the pH, including when you add what bolumes of water.
excess permanganate remains after the reaction period, a small amount of ethanol
Liquid butane C4H10 , the fuel used in many disposable lighters, has delta Hfinal=-147.5 kj and a density of 0.579 g/ml . Use Hess's law to calculate the enthalpy of combustion in kJ/mol.
a gas is placed in a storage tank at a pressure of 20.0 atm at 20.3 degrees celsius. as a safety device there is a
What is the the structures of both products and how can you distinguished them using IR spectroscopy?
Calculate the acidity constant of benzoic acid in water at 298K if Delta Gf for C6H5CO2-(aq) is -269.2 kj/mol and delta Gf for C6H5COOH(aq) is -293.1 kj/mol. (The Delta Gf has a degree symbol on it if that is needed.)
A 1.20-L container contains 1.10 g of an unknown gas at STP. What is the molecular weight of the unknown gas?
The Environmental Protection Agency has estimated that 119 tons of mercury are currently emitted to Earth's atmosphere annually due to human activities
a metal object with a mass of 19g is heated to 96 degrees c then transferred to a calorimeter containing 75 g of water
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