One mole of CO2 comprises what constituents?
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Answer: D. both B. & C.
Explanation
One mole of carbon dioxide contains Avogadro's number of carbon atoms and two moles of oxygen atoms. Because each molecule of CO2 consists of one carbon atom and two oxygen atoms, the molar proportions scale accordingly. Therefore, statements involving gram-equivalents and molar amounts of its individual elemental components accurately describe this chemical quantity. A mole is the fundamental SI unit representing exactly 6.02214076 times ten to the twenty-third elementary entities of a substance. Avogadro's number provides the essential conversion factor linking microscopic atomic masses to macroscopic laboratory quantities. Carbon dioxide is a linear triatomic gas composed of one central carbon atom double-bonded to two surrounding oxygen atoms.
Option A lists oxygen atoms incorrectly, missing the factor of two required since each carbon dioxide molecule contains two oxygen atoms. Option B correctly describes the gram-electron and mass proportions associated with the components of one mole of carbon dioxide. Option C correctly notes the Avogadro number of carbon atoms present in exactly one mole of carbon dioxide molecules.
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