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Nitrogen and Oxygen form an extensive series of oxides of general formual NxOy; at least 7 are known. One of them is a blue solid that comes apart reversibly in the gas phase. It contains 36.84% N and the rest is Oxygen. What is the empirical formula of this oxide
What is the half-life of a compound if 78 percent of a given sample of the compound decomposes in 45 min? Assume first-order kinetics.
Suppose you have a sample of sodium weighing 11.42 g. How many atoms of sodium are present in the sample.
Permanganate ions, MnO4-, oxidize acetaldehyde, CH3CHO, to acetic acid CH3CO2H, and are reduced to MnO2. The reaction takes place in acidic solution.
Fish are processed into Fish meal and used as a supplemen- tary protein food. In the processing the oil is First extracted to produce wet Fish cake containing 80 wt % water and 20 wt % bone-dry cake
A mixture of Ar and N2 gases has a density of 1.592 g/L at STP. What is the mole fraction of each gas?
Calculate the final temperature of a mixture of 100.0 g of ice initially at -16.0 degrees C and 375.0 g of water initially at 90.0
A sample of 255mg of neon occupies 3.00dm3 at 122K. Use the perfect gas law to calculate the pressure of the gas.
Compare the polarity of hexane, dichloromethane, ethyl acetate, acetone, and methanol for tlc (thin layer chromatography)
A normal value for blood cholesterol is 200mg/dl of blood. If a normal adult has a total blood volume of 5 L, how much total cholesterol is present.
How many ml of 94 w/w% sulfuric acid (d=1.84 g/cm^3) is necessary for the preparation
Calculate the concentration of the acetate ion (mol/L) in a solution prepared by dissolving 1.00×10-2 mol of HCl(g) in 1.00 L of 9.00×10-1 M aqueous acetic acid. Equilibrium constants may be found in an appendix to your text.
calculate the percent (by volume) of air that is displaced if all of the liquid nitrogen evaporates.(liquid nitrogen has a density of 0.807 g/mL)
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