Multiple Choice
In a pressure vs. volume experiment involving a gas, which method is typically used to control the volume of the gas?
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7. Gases
Gas Stoichiometry
Multiple Choice
Bags of potato chips are typically filled with which gas to preserve freshness?
A
Helium (He)
B
Oxygen (O_2)
C
Nitrogen (N_2)
D
Carbon dioxide (CO_2)
Verified step by step guidance1
Understand the purpose of the gas inside potato chip bags: it is used to preserve freshness by preventing oxidation and crushing of the chips.
Recall that oxygen (O_2) promotes oxidation, which causes staleness and spoilage, so it is not used inside the bags.
Consider that helium (He) is a very light gas but does not have properties that help preserve freshness or prevent oxidation.
Recognize that nitrogen (N_2) is an inert gas, meaning it does not react easily with other substances, making it ideal for displacing oxygen and preserving freshness.
Note that carbon dioxide (CO_2) is used in some food packaging but can affect taste and texture, so nitrogen is preferred for potato chips.
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