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Problem- A mixture of N2 and O2 has a density of 1.185 g/L at 25 degrees C and 1.00 atm. What is the mole fraction O2 in the mixture . Assume ideal gas behavior.
Please illustrate work as well as walk me during the problem so that I can follow and understand it.
Molecule X has an absorbance of 0.287 at 247nm when a 7.67 x 10^-5 M solution is measured in a 2.25 cm cell. What is the molar absorptivity of X
`If mix the proper amounts of copper(II) nitrate and potassium hydroxide solutions to prepare 5.24 g of copper(II) hydroxide. Subsequent to drying, the student recorded a mass of 4.38 g. Explain what was the percent yield of the reaction
In a photoelectron spectrometer the ionizing radiation has a wavelength of ? = 0.772 nm. How much enegy is present in a mole of these photons
The greatest entropy of mixing
Looking for a good explanation of how a typical 1H NMR spectrum can be obtained, outlining the physical basis for achieving the absorption of radio-frequency energy.
1. Gasoline (assumed to be 100% octane) is combusted in your car according to the following chemical reaction: 2 C8H18 + 25 O2 -> 16 CO2 + 18 H2O
A 1.750-g sample containing potassium hydrogen carbonate is decomposed by heating. If the mass loss is 0.271g, what is the percentage of KHCO3 in the unknown mixture
which of the following are found in cell membranes?
The experimental conditions are a modified perkins reaction (benzaldehyde + sodium acetate + acetic anhydride).
Calculate the final temperature of a mixture of 150.0 g of ice initially at -13.5 degrees celsius and 345.0 g of water initially at 86.5 degrees celsius.
A toothpaste contains 0.24 by mass sodium fluoride used to prevent dental caries and 0.30 by mass triclosan , a preservative and antigingivitis agent. One tube contains 125 toothpaste.
A 2.32-L vessel contains 4.49 g of a gas at 1.08 atm and 26.9°C. What is the density of the gas in g/L?
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