The Earth's Atmosphere Is Composed (By Volume)of 78

question 10

Multiple Choice

The Earth's atmosphere is composed (by volume) of 78.08% nitrogen (N₂) ,20.95% oxygen (O₂) ,0.93% argon (Ar) ,0.25% water vapor (H₂O) ,and traces of other gases,most importantly,carbon dioxide (CO₂) .The CO₂ content of the atmosphere is currently around 0.039%.The average mass of a mole of the atmosphere is 28.96 g and the molar mass of carbon dioxide is 44 g.What is the total mass of CO₂ in the Earth's atmosphere?

• A)2.05·10¹⁵ kg
• B)3.11·10¹⁵ kg
• C)4.86·10¹⁵ kg
• D)7.97·10¹⁸ kg
• E)5.25·10¹⁸ kg

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Definitions:

Food and Drug Administration

A federal agency of the United States responsible for protecting and promoting public health through the control and supervision of food safety, tobacco products, dietary supplements, prescription and over-the-counter pharmaceutical drugs, vaccines, biopharmaceuticals, blood transfusions, medical devices, electromagnetic radiation emitting devices, cosmetics, and veterinary products.

Public Interest Theory

A theory suggesting that regulation is supplied in response to the demand of the public for the correction of inefficient or inequitable market practices.

Industrial Regulation

Government policies and rules aimed at regulating and controlling industry practices to promote fair competition, protect consumer interests, and prevent market abuses.

Natural Monopolies

A market structure where a single firm can produce the entire market output at a lower cost than could multiple firms, often due to high fixed costs.