The figure below shows anaerobic corrosion of a piece of steel accelerated by the action of anaerobic microorganisms. What should be on label 2? $The figure below shows anaerobic corrosion of a piece of steel accelerated by the action of anaerobic microorganisms. What should be on label 2? a. Elemental sulfur and iron directly react to produce \mathrm{FeS} . b. Iron reduces \mathrm{H}_{2} \mathrm{~S}: 4 \mathrm{Fe}+\mathrm{SO}+4 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{FeS}+3 \mathrm{Fe}^{2+}+8 \mathrm{OH} c. Acid rain is produced: \mathrm{H}_{2} \mathrm{O}+1 / 2 \mathrm{O}_{2}+2 \mathrm{NO}_{2} \rightarrow 2 \mathrm{HNO}_{3} d. Acid rain is produced: 2 \mathrm{H}_{2} \mathrm{O}+3 \mathrm{O}_{2}+4 \mathrm{NO} \rightarrow 4 \mathrm{HNO}_{3} e. Acid rain is produced: 2 \mathrm{H}_{2} \mathrm{O}+\mathrm{O}_{2}+2 \mathrm{SO}_{2} \rightarrow 2 \mathrm{H}_{2} \mathrm{SO}_{4}$
a. Elemental sulfur and iron directly react to produce

\mathrm{FeS}

.
b. Iron reduces

\mathrm{H}_{2} \mathrm{~S}: 4 \mathrm{Fe}+\mathrm{SO}+4 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{FeS}+3 \mathrm{Fe}^{2+}+8 \mathrm{OH}

c. Acid rain is produced:

\mathrm{H}_{2} \mathrm{O}+1 / 2 \mathrm{O}_{2}+2 \mathrm{NO}_{2} \rightarrow 2 \mathrm{HNO}_{3}

d. Acid rain is produced:

2 \mathrm{H}_{2} \mathrm{O}+3 \mathrm{O}_{2}+4 \mathrm{NO} \rightarrow 4 \mathrm{HNO}_{3}

e. Acid rain is produced:

2 \mathrm{H}_{2} \mathrm{O}+\mathrm{O}_{2}+2 \mathrm{SO}_{2} \rightarrow 2 \mathrm{H}_{2} \mathrm{SO}_{4}

What Is Lithotrophy

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