Compared to Air, the Density of an 80% He and 20

question 54

Multiple Choice

Compared to air, the density of an 80% He and 20% O₂ mixture is about which of the following?

• A)two-thirds as much
• B)one-half as much
• C)one-third as much
• D)one-fifth as much

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Definitions:

Local Air Pollution

Contamination of the air within a specific area or region, primarily due to human activities, that can harm human health and the environment.

Deforestation

The large-scale removal of forest areas through cutting or burning, often to clear land for agriculture or development.

Fossil Fuel Burning

The combustion of coal, oil, gas, or other fossil fuels to produce energy, resulting in the emission of greenhouse gases and other pollutants.

Industrial Revolution

A period of major industrialization from the late 1700s to the early 1800s that transformed largely agrarian societies into industrialized ones.