A Gas-Phase Decomposition Is First-Order with Respect to the Reactant

question 70

Multiple Choice

A gas-phase decomposition is first-order with respect to the reactant, R. If the initial concentration of R is 1.0 × 10^-4 mol L^-1 and the rate constant k = 1.08 × 10^-6 s^-1, what concentration of R remains after 25 days?

• A) 1.0 × 10^-3 mol L^-1
• B) 1.0 × 10^-4 mol L^-1
• C) 9.6 × 10^-5 mol L^-1
• D) 4.3 × 10^-5 mol L^-1
• E) 9.7 × 10^-6 mol L^-1

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Definitions:

Trigonal Planar

A molecular geometry where a central atom is connected to three other atoms placed at the corners of an equilateral triangle.

Molecular Polarity

Molecular polarity refers to the distribution of electrical charges over the atoms in a molecule, affecting its interaction with other molecules and solvents.

Solvent Interaction

The interaction between a solvent and solute which leads to the dissolution of the solute into the solvent.

Melting Point

The melting point is the temperature at which a solid substance transitions to a liquid state, indicative of the heat required to break the molecular bonds within the solid.