What Is the Source of the Acidic PH of Some

question 19

Multiple Choice

What is the source of the acidic pH of some mine runoff?

• A) Iron ores are reduced by exposure to the atmosphere.
• B) Pyrite is oxidized by exposure to the atmosphere and microbes.
• C) Iron ores contain sulfuric acid (H₂SO₄).
• D) Sulfur-containing ores are reduced by exposure to oxygen.
• E) Hydrogen gas trapped in ore reacts with the atmosphere to produce hydrochloric acid (HCl).

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Definitions:

Urban Land

Urban land is designated areas in cities and towns used for residential, commercial, industrial, or recreational purposes.

Economic Rent

Represents the payment to an owner or factor of production in excess of the costs needed to bring that factor into production. In simpler terms, it's the extra income earned because of an owner's unique position or resource.

Marginal Land

Land that yields minimal agricultural output due to poor soil quality, steep slopes, or other environmental factors.

Location

Refers to the geographical situation of a place based on physical and human factors, influencing its connectivity and economic activities.