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A sample of a liquid from an unlabeled bottle was subjected for analysis: MS showed that M+ has an m/z of 89 and IR displayed bands at 2995-2840 cm-1, and 1562, and 1425. Identify the functional group in the molecule and provide 2 possible structures
Calculate the pH during the titration of 24.8 mL of 0.793 M HBr(aq) with 0.219 M KOH(aq) after 14.1 mL of the base have been added.
When a 2.41x102 g strip of zinc is dropped into a large beaker containing excess hydrochloric acid, how many grams of gas are formed.
How much 10.0 M HNO3 must be added to 1.00L of a buffer that is 0.0100 M acetic acid and 0.1 M sodium acetate to reduce the pH 4.70?
A gas expands and does P-V work on the surroundings equal to 261 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system?
Calculate the number of photons emitted in one second by a 6 W laser operating at a wavelength of 438.0 nm
Calculate the enthalpy change per mole for this process. ( Assuming C=4.18 J deg c^-1 g^-1 and density of the final solution is 1.00g/ml).
A 1.013-g sample of ZnSO4xH2O is dissolved in an aqueous solution of BaCl2. The pure BaSO4 precipitate is filtered out of solution, dried, and its mass is determined to be 0.9400 g. What is the value of x in ZnSO4xH2O?
According to the following reaction, how many grams of tetraphosphorus decaoxide are required for the complete reaction of 29.9 grams of perchloric acid (HClO4). perchloric acid (HClO4) (aq) + tetraphosphorus decaoxide (s) phosphoric acid (aq) + d..
Using Henry's Law to calculate gas solubility If air contains 78% N2 by volume, what is the solubility of N2 in water of 25oC and 1 atm (Henry's constant kH for N2 in H2O at 25oC = 7 x 10-4 mol/L.atm)?
when that precipitate was treated with NH3 it turned black. Based on this what can you say about the ions that may be present or absent in the solution? Can you reach a conclusion about the presence or absence of each of the three ions based on th..
Calculate the hydronium concentration for a solution prepared by dissolving 0.15 mol of benzoic acid (C6H5COOH) and 0.30 mol of sodium benzoate (C6H5COONa) in 1.00 L of solution. (Ka of C6H5COOH = 6.5 x 10-5)
This mixture has density of 1.391g/L and occupies a volume four times as that of pure hydrocarbon. Determine the molecular formula of the hydrocarbon.
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