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The density of air at ordinary atmospheric pressure and 25 degrees C is 1.19 g/L. What is the mass, in kilograms, of the air in a room that measures 10.0 X 13.5 X 10ft
Calculate the entropy change when 100 g of argon is heated and compressed from 300 K, 1.0 atm, to 900 K, 17 atm
The dipole moment of a compound depends on the resultant partial charges based on the electronegativities of the individual constituents present in the compound. Based on this definition, write the resulting dipole moment in the following compounds
120.0 mL sample of a 0.81 M H2SO4 solution is diluted with enough water to reduce the concentration of the solution to 0.50 M. What is the volume of the diluted H2SO4 solution.
complete and balance the following redox equation. What is the coefficient of H2O when the equation is balanced using the set of smallest whole-number coefficients
Naturally occurring element X exists in three isotopic forms: X-28 (27.977 amu, 92.21% abundance), X-29 (28.976 amu, 4.70% abundance), and X-30 (29.974 amu, 3.09% abundance). Calculate the atomic weight of X.
A sample of ammonia gas at 65.5°C and 524 torr has a volume of 15.31 L. What is its volume when the temperature is -15.8°C and its pressure is 524 torr
A 3.50-g sample of magnesium hydroxide was treated with 50.0 mL of a 0.500 M aqueous sulfuric acid solution. Calculate the number of grams of magnesium hydroxide that remained undissolved.
a bicycle tire is filled with air to a pressure of 100 psi at a temperature of 100 degrees c. riding the bike on
cu/cu^2+ concentration cell has voltage of .21V at 25 c. the concentration of cu^2+ in one of the other half cell is 1.4E-3M. What is the concentration of{Cu^2 + in the other half-cell
How do old dispersive infrared (IR) instruments use a grating to separate the infrared source by wavelength before passing through the sample?
What is the isotopic difference (in per mil) at 25degrees between gas, liquid, and solid phase for the elements carbon and sulfur. Show calculations
A separate experiment is conducted in which 4.82 x 10-5 M CaI2(aq) is added to a solid solution of PbI2 at 20 oC. Qualify how the molar solubility changes
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