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If the pressure exerted by ozone, O3, in the stratosphere is 3.0 x 10-3 atm and the temperature is250 K, how many ozone molecules are in a liter of the air?
What is the freezing point of water under a pressure of MPa? Assume that the density of ice is 0.915 g.cm^-3 and that of liquid water is 0.998 g cm^-3 at this pressure
Where did the energy required to maintain the system at a constant temperature in the two isothermal processes described? PAth A- sudden irreversible decrease in pressure from P1 to P2 ( P2
Which compound ranks #1 in terms of pounds produced annually in the United States. sodium hydroxide, ammonia
A cube of osmium metal 1.500cm on a side has a mass of 76.31g at 25°C. Calculate the mass of 0.1500L of benzene at this temperature.
An unknown nuclide decays by elimination of 2 alpha particles followed by a positron. Bombarding this decay product with a 6Li nucleide creates the single nuclide Pb-207. What was the origional nuclide
You have a 1 g/L solution of soil organic matter. The amount of fulvic acid is 2 times the amount of humic acid. You add 2 mM Cu to a final [Cu] =0.8 mM. Experiment at pH 6.5. Equation Cu2+ + 2HLi = CuLi2 + 2H+. Li = [FA]+[HA].
A 0.5212 g sample of an unknown monoprotic acid was titrated with 9.96 X 10^-2 M NaOH. The equivalence point of the titration occurs at 23.92 mL. Determine the molar mass of the unknown acid.
An ionic crystal unit cell is composed of two ions, X and Y. The empirical formula of this solid is XY2. If the X ions occupy the eight lattice points at the corners of the unit cell and on all six faces
A solution containing the two compounds exhibits absorbances (using a 1.00cm cell) of 0.726 and 0.544 at 267 and 312nm, respectively. What are the concentrations of A and B in mg/mL? Note: The aborptivity values are given in units of L/g.cm.
4.626g sample of hydrocarbon upon combustion yielded 6.484g of CO2, what is the % by weight of the carbon in the hydrocarbon
The vapor pressure of water above this solution is found to be 0.3630 atm at 348.0 K . The vapor pressure of pure water at this temperature is 0.3804 atm.
A sample of river water has a bicarbonate ion concentration of 1.0 × 10-4M. Calculate the total alkalinity for the sample in mmol/L.
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