Chemistry High School

Identify which of the following gases have variable concentration in the atmosphere.
-Carbon Dioxide
-Methane
-Ozone
-Water Vapor

Answers

Answer 1

Water vapor is the gas that has a variable concentration in the atmosphere. Its concentration can vary greatly depending on factors such as temperature, humidity, and weather patterns.

Water vapor is constantly being added to the atmosphere through evaporation from bodies of water and transpiration from plants. It can also condense into clouds and precipitation, leading to fluctuations in its concentration in different regions and over time. On the other hand, carbon dioxide, methane, and ozone are considered trace gases and their concentrations in the atmosphere are relatively stable, with variations mainly due to human activities and natural processes.

The gases that have variable concentrations in the atmosphere are:

- Carbon Dioxide (CO2): The concentration of carbon dioxide in the atmosphere can vary due to natural processes such as photosynthesis and respiration, as well as human activities like the burning of fossil fuels. Changes in land use, deforestation, and industrial processes can contribute to fluctuations in carbon dioxide levels.

- Methane (CH4): Methane concentrations in the atmosphere can vary as a result of both natural and anthropogenic sources. Natural sources include wetlands, termites, and natural gas seepage, while human activities such as livestock farming, rice cultivation, and fossil fuel extraction contribute to increased methane emissions.

- Ozone (O3): Ozone concentrations in the atmosphere can vary regionally and temporally. While ozone is naturally present in the stratosphere, where it plays a crucial role in protecting the Earth from harmful UV radiation, ground-level ozone is formed through chemical reactions involving pollutants emitted by human activities, including vehicle emissions and industrial processes.

- Water Vapor (H2O): Water vapor is highly variable in the atmosphere and its concentration can vary significantly depending on the location, temperature, and weather conditions. It is influenced by factors such as evaporation from bodies of water, transpiration from plants, and atmospheric dynamics. Water vapor is a key component of the Earth's climate system and plays a crucial role in weather patterns.

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Related Questions

which of the following elements would you expect to form diatomic molecules?
a. sulphur
b. argon
c. helium
d. hydrogen

Answers

The element that is expected to form diatomic molecules is d. hydrogen (H).

Diatomic molecules are molecules composed of two atoms of the same element bonded together. They are stable configurations for certain elements under normal conditions. Hydrogen is a diatomic element, meaning it naturally exists as H, with two hydrogen atoms bonded together.

On the other hand, the other options do not typically form diatomic molecules under normal conditions.

- Sulphur (S) is an element that exists as S8, forming octatomic molecules made up of eight sulphur atoms bonded together.

- Argon (Ar) is a noble gas and exists as single atoms. Noble gases are generally non-reactive and do not form diatomic molecules.

- Helium (He) is also a noble gas and exists as single atoms. Like other noble gases, helium does not readily form diatomic molecules.

Therefore, among the given options, hydrogen (H) is the element that is expected to form diatomic molecules.

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