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The heat of vaporization of water is 40.66 kJ/ mol. Explain how much heat is absorbed when 2.46 g of water boils at atmospheric pressure?
The delta H for the oxidation of S in the gas phase to SO3 is -204 kJ/mol and for the oxidation of SO2 to SO3 is 89.5 kJ/mol. Find the enthalpy of formation of SO2 under these conditions.
What is the wavelength (in meters) of photons with the following energies? In what region of the electromagnetic spectrum does each appear?
Use the letter from the reagent table for inorganic reagents and write the IUPAC substitutive name for the bromoalkane.
Calculate the weight of KMnO 4 contained in 2 liters of a 0.15N (not M) solution.
Find the absolute and percent relative uncertainty and express each answer with a reasonable amount of significant figures. What is the absolute value , absolute error and relative error of:
What is the molarity of a solution if 4.50 g NaF is dissolved in enough water to make 250.0 mL of solution?
When 0.250 grams of a polymer were dissolved in 22.9 mL of benzene at 21.6 degrees C, the osmotic pressure was found to be 0.044 atm. Calculate the molar mass of the protein.
Here are some data collected on a sample of cesium exposed to various energies of light. Light energy ({\rm eV}) Electron emitted. Electron KE ({\rm eV}) 3.87 no - 3.88 no - 3.89 yes 0 3.90 yes 0.01 3.91 yes 0.02 Part A What is the threshold frequ..
Write the chemical equation and the Kb expression for the reaction of each of the following bases with water: ammonia, NH3; hydrogen sulfide, HS- ; hypochlorite ion, ClO-
If the sign for delta G is negative (spontaneous process) and the sign for delta S is positive (more disorder) for both dissolving processes, how could one be endothermic (positive delta H) and one be exothermic
A clinic took temperature readings of 250 flu patients over a weekend and discovered the temperature distribution to be Gaussian, with a mean of 101.00°F
At noon on a clear day, sunlight reaches the earth\'s surface at Madison, Wisconsin, with an average power of approximately 2.00 kJ·s-1·m-2. If the sunlight consists of photons with an average wavelength of 510.0 nm, how many photons strike a 5.40..
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