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Provide a structure for the following compound: EI mass spectrum: two molecular ions of about equal intensity at m/z = 180 and 182; IR: 1740 cm-1; 1H NMR: ? 1.30 (3H, t J = 7 Hz); ? 1.80 (3H, d, J = 7 Hz); ? 4.23 (2H, q, J = 7
In the reaction of aluminum metal and oxygen gas to make aluminum oxide, how many moles of aluminum will react with 0.80 grams O2?
The average molecular speed in a sample of CH4 gas is 641 m/s at 311 K. The average molecular speed in a sample of He gas is ________ m/s at the same temperature.
In a solution of acetone and ethanol, the mole fraction of acetone is 0.40. What is the concentration of acetone as a mass percent?
How many grams of sodium nitrite must be added to 120.0 mL of 0.15 M nitrous acid in order to prepare a buffer solution at pH 4.3? The pKa of nitrous acid is 3.337.
What is the molarity of a solution of 14.0 g NH4Br in enough H2O to make 150 mL of solution?
Twenty-five pounds of gas consisting of 40% CO, and 30% H2 are placed in a cylinder 200 ft^3 in volume. What is the a) average molecular weight of the gas?
A student went out of the lab to talk on the phone and returned to find that their partner had neglected to monitor the ice bath used to chill their diazonium ion solution
The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. But given the same kinetic energies, a lighter molecule will move faster than a heavier molecule.
the NERNST equation is used to predict the impact of concentration on the cell potential. What value of slope does the Nernst equation predict for a plot of Ecell vs. log(cu2+ conc ratio)
Both the meta- and para- forms of phenylene diamine are used in the production of Kevlar and Nomex, respectively. Why is a corresponding material with similar properties not made from ortho-phenylene diamine, and why is the ortho-form of the diami..
Balance the following full redox reactions using the lowest integer coefficients, in basic conditions. NiO2(s) + Zn(s) ? Ni(OH)2(s) + ZnO22?(aq)
What is the coordination environment of F in a hypothetical relative of CaF2, in which Ca forms a hcp array and F occupies all the tetrahedral sites?
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