Final answer:
The two predominant compounds in acid rain are sulfur dioxide (SO2) and nitrogen oxides (NOx), which are emitted from the combustion of fossil fuels and form acidic compounds when reacting in the atmosphere.
Step-by-step explanation:
The two compounds that are predominant in acid rain are sulfur dioxide (SO2) and nitrogen oxides (NOx). These substances are primarily emitted through the combustion of fossil fuels and react with water vapor in the atmosphere to form sulfuric and nitric acids. These acidic compounds contribute to the lowered pH of rainwater, making it acidic.
Anthropogenic causes of acid rain are mainly due to emissions of sulfur dioxide and nitrogen oxides. These gases react with water, oxygen, and other chemicals in the atmosphere to form sulfuric and nitric acids, resulting in acid rain.