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Suppose that we have a mixture of N2 (g) and O2 (g) of unknown composition whose total pressure is 385 torr. If all the oxygen as is removed from the mixture by reaction with phosphorus, which does not react directly with nitrogen, then the new pressure is 251 torr. Calculate (a) the partial pressure of nitrogen and (b) the mole fraction of each gas in the original mixture.
liquid nitrogen has a density of 0.807 g/ml at -195.8 C, if 1.00 L of N2 is allowed to warm to 25 C at a pressure
The Cu-Ni system is an isomorphous one, meaning that the crystal structure does not change with alloying; in particular, Cu and Ni atoms randomly substitute for one another within a FCC crystal structure
the ionic substance t3u2 ionizes and produces ions as t2and u3-ions. determine the value of the solubility-product
What is being oxidized and what is being reduced: feso4 + k2cr2o7 + h2so4 = cr2(so4)3 + fe2(so4)3 +h2o + k2so4
1. In a plot of absorbance verus time, what are the units for the slope 2. Assuming a pathlength of 1 cm
25.00 mL of a tap water sample is titrated with5.00x10-3 M EDTA solution. 6.25 mL are required to reachthe endpoint. What is the hardness of the water in ppm
If an automobile airbag has a volume of 9.80 L, what mass of NaN3 is required to fully inflate the airbag upon impact under conditions of atmospheric pressure (1.00 atm) and room temperature (25 C).
calculate the difference between the Gibbs free energy and Helmholtz free energy for this reaction at normal temperatures and pressures.
calculate the freezing point and boiling point of an aqueous solution that is .040 molality in na3po4. assume that the
Propose structures for aromatic hydrocarbons that meet the following descriptions:
Determine how many of the isomers will have a parent name of heptane. (I know the answer is 3, but is there a formula to easily figure it out or how do you go about knowing when you've drawn enough molecules to determine
What is the Lewis structure of the covalent compound that contains one nitrogen atom, one hydrogen atom, and one carbon atom
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