A First-Order Chemical Reaction Is Observed to Have a Rate

question 44

Multiple Choice

A first-order chemical reaction is observed to have a rate constant of 24 min^-1.What is the corresponding half-life for the reaction?

• A)1.7 s
• B)1.7 min
• C)35 min
• D)2.5 s
• E)34.3 s

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Definitions:

Ethyne

A colorless gas with a sharp, distinct odor; the simplest alkyne, it is a hydrocarbon with the formula C2H2.

Acetylene

A hydrocarbon and the simplest alkyne, used as a fuel and a chemical building block, recognized by its formula C2H2.

Covalently Bonded Molecule

A molecule whose atoms are held together by covalent bonds, which involve the sharing of electron pairs between atoms.

Hydrogen

The first element on the periodic table, with the symbol H, known for being the lightest and most abundant chemical element in the universe.