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

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

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

A quantity of N2 gas originally held at 3.80 atm pressure in a 1.00 L container at 26.0ºC is transferred to a 10.0 L container at 20.0ºC. A quantity of O2 gas originally at 4.75 atm and 26.0ºC in a 5.00 L container is added to the 10.0 L container already containing the N2.

a) Draw a diagram outlining this experiment, labeling the various quantities.

b) Calculate the total pressure in the new container.

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

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Expert Solution

queen_honey_blossom answered 11 months ago

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