Final answer:
A piston cylinder arrangement can contain a variety of gases such as air, hydrogen, and others, as shown in the examples which focus on the behavior of these gases under changes in temperature and pressure. All options are correct.
Step-by-step explanation:
A piston cylinder arrangement can contain various gases in different contexts, often related to thermodynamics and gas laws. In the examples given, substances such as air (which consists of oxygen, nitrogen, hydrogen, water vapor), hydrogen gas (Hâ‚‚), and neon gas can be contained within such an arrangement for experiments or practical applications.
In the provided scenarios, the arrangement is used for understanding the behavior of gases under different conditions, such as temperature and pressure changes. The example questions deal with calculating moles of gas in a chamber, determining final volumes and temperatures after heat addition and compression, and identifying the pressure in a gas cylinder for medical calibration purposes.
Regarding the specific gas contained within a piston-cylinder system, it depends on the experiment's objectives. One might introduce oxygen for combustion studies, carbon dioxide for investigations related to greenhouse gases or plant respiration, nitrogen for inert atmosphere experiments, or hydrogen for reactions involving this gas.