Multiple Choice
Nonpolar covalent bonds are always formed from atoms that are __________.
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11. Bonding & Molecular Structure
Chemical Bonds
Multiple Choice
Which term best describes the role of hydrogen gas in the formation of a water molecule?
A
Product
B
Reactant
C
Catalyst
D
Solvent
Verified step by step guidance1
Identify the substances involved in the chemical reaction forming water. Hydrogen gas (H\_2) and oxygen gas (O\_2) combine to form water (H\_2O).
Understand the definitions of the terms: A reactant is a substance that undergoes change during a chemical reaction; a product is the substance formed as a result of the reaction; a catalyst speeds up the reaction without being consumed; a solvent is a medium in which reactions occur but does not react itself.
Since hydrogen gas is consumed and chemically changes to form water, it fits the definition of a reactant.
Confirm that hydrogen gas is not a product because it is not formed by the reaction, nor is it a catalyst or solvent because it participates directly in the reaction.
Therefore, the best term to describe the role of hydrogen gas in the formation of water is 'Reactant'.
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