Apentix/AP Chemistry/Unit 4: Chemical Reactions/Question

AP Chemistrymediummcq1 pt

Which diagram best represents the reaction 2H₂ + O₂ → 2H₂O at the particle level?

A.Two H₂ pairs plus one O₂ pair yielding two H₂O molecules

B.One H₂ plus one O₂ yielding one H₂O

C.Two H atoms plus one O atom yielding H₂O

D.Two H₂ plus one O₂ yielding H₂O₂

Explanation

Core Concept

Particle drawings must respect coefficients: two diatomic hydrogen molecules react with one diatomic oxygen molecule to make two water molecules, with atoms rearranged but conserved.

Correct Answer

ATwo H₂ pairs plus one O₂ pair yielding two H₂O molecules

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