Using Hydrogen (H₂) to Reduce Magnetite (Fe₃O₄) to Iron (Fe)

question 32

Multiple Choice

Using hydrogen (H₂) to reduce magnetite (Fe₃O₄) to iron (Fe) is considered to be "greener" than using carbon monoxide (CO) because

• A) there are more molecules of the CO₂ by-products produced than molecules of the water by-product.
• B) water contributes less to climate change than carbon dioxide does.
• C) using hydrogen uses much less energy than using carbon monoxide does.
• D) the iron produced by using hydrogen can be replaced by aluminum more easily.

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Definitions:

Collectively Exhaustive

A condition where all possible outcomes or cases are considered together, covering every eventuality.

Probability

A measure of the likelihood of a given event occurring, often expressed as a number between 0 and 1.

Mutually Exclusive

Events or propositions that cannot both be true or occur at the same time, implying the occurrence of one event excludes the occurrence of the other.

P(A)

The probability of event A occurring.