You are given a cylinder of an unknown, nonradioactive, noblegas and tasked to determine its molar mass and use that value toidentify the gas. The tools available to you are several empty mylarballoons that are about the size of a grapefruit when inflated (gasesdiffuse through mylar much more slowly than conventional latexballoons), an analytical balance, and three graduated glass beakersof different sizes (100 mL, 500 mL, and 2 L). (a) To how manysignificant figures would you need to determine the molar massto identify the gas? (b) Propose an experiment or series of experimentsthat would allow you to determine the molar mass of theunknown gas. Describe the tools, calculations, and assumptionsyou would need to use. (c) If you had access to a broader range ofanalytical instruments, describe an alternative way you could identifythe gas using any experimental methods that you have learnedabout in the earlier chapters.
You are given a cylinder of an unknown, nonradioactive, noble
gas and tasked to determine its molar mass and use that value to
identify the gas. The tools available to you are several empty mylar
balloons that are about the size of a grapefruit when inflated (gases
diffuse through mylar much more slowly than conventional latex
balloons), an analytical balance, and three graduated glass beakers
of different sizes (100 mL, 500 mL, and 2 L). (a) To how many
significant figures would you need to determine the molar mass
to identify the gas? (b) Propose an experiment or series of experiments
that would allow you to determine the molar mass of the
unknown gas. Describe the tools, calculations, and assumptions
you would need to use. (c) If you had access to a broader range of
analytical instruments, describe an alternative way you could identify
the gas using any experimental methods that you have learned
about in the earlier chapters.
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