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Chlorofluorocarbons (CFCs) such as CF2Cl2 are refrigerants whose utilize has been phased out because of their destructive effect on Earth's ozone layer. The standard enthalpy of evaporation of CF2Cl2 is 17.4 kJ/mol, Evaluate with delta hvaporization = 41 kJ/mol for liquid water. Explain how many grams of liquid CF2Cl2 are needed to cool 122.1 g of water from 48.6 to 27.6 degrees Celsius? The specific heat of water is 4.184 J/(g x degrees Celsius).
When a Group III unknown was treated with an aqueous ammonia/ammonium chloride and ammonium carbonate, a white precipitate was produced.
Depict the product of the reaction between 3-phenylpropyne and NaNH2 in NH3, then D3O+, followed by D2, Pd/C.
One component of wet rust is Fe(OH)2' How many grams of oxygen, O2, are in 1 kg of Fe(OH)2
A 0.358 g sample of KAu(CN)2, has 7.48 x 1020 atoms of Au. How many atoms are in this entire sample?
if you were monitring the titation by visible spectroscopy what wavelength would you select for the data analysis? why?
how many whole drops (.05 mL/drop) of 6 M HCl are required to dissolve the calcium carbonate? b) What is the Ca concentration when this is dissolved and diluted to 100.00mL
Explain while X rays of wavelength 0.093 nm are diffracted by a metallic crystal, the angle of first-order diffraction (n = 1) is measured to be 15.2°. Explain what is the distance between the layers of atoms responsible for the diffraction
Most of the alkali halides exhibit the "rock salt" structure shared by NaCl. Using the ionic radii Li 76pm, F 133pm, K 138pm, Br 196pm, show that LiF and KBr are consistent with the rule of thumb that the NaCl structure occurs for radius ratios be..
Determine the structure of compound U. Be sure to include a concise discussion of the reasoning. Construct tables summarizing the IR and 1H NMR data, and assign the peaks in the IR and NMR spectra to the appropriate structural elements in U. Expla..
imagine two solutions with the same concentration and the same boiling point but one has benzene as the solvent and the
A 1.0 L sample of a gaseous compound of hydrogen, carbon, and nitrogen gave upon combustion 2.0 L of CO2, 3.5 L of H2O vapor, and 0.50 L of N2 (with all gas volumes measured at the same T and P). What is the empirical formula of the compound?
determine the geometry of using vsepr theory of
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