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Although argon makes up 0.93 percent of the atmosphere, the gas evaded discovery until 1894, when...

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Chemistry

Although argon makes up 0.93 percent of the atmosphere, the gasevaded discovery until 1894, when physicist Lord Rayleigh andchemist William Ramsey identified it. The clues for the discoveryof argon came from density measurements of nitrogen.

a) When Rayleigh prepared pure nitrogen from the decompositionof ammonia (NH3), he found that the nitrogen collected had apressure of 1.0926 atm at 298.15 K. Use this data to calculate thecorrect density of nitrogen to four significant figures.

A quantity of N2 gas originally held at 3.80 atm pressure in a1.00 L container at 26.0ºC is transferred to a 10.0 L container at20.0ºC. A quantity of O2 gas originally at 4.75 atm and 26.0ºC in a5.00 L container is added to the 10.0 L container alreadycontaining the N2.

a) Draw a diagram outlining this experiment, labeling thevarious quantities.

b) Calculate the total pressure in the new container.

c) What is the mole fraction of the nitrogen gas in the newlyformed mixture?

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