A Reaction Is First Order

question 5

Multiple Choice

A reaction is first order.If its initial rate is 0.0200 M/s and 25.0 days later its rate is 6.25 × 10^-4 M/s,then its half-life is ________.

• A)12.5 days
• B)5.0 days
• C)25.0 days
• D)50.0 days
• E)2.5 days

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Definitions:

Cortex

The outer layer of various organs and systems in the body, such as the brain (cerebral cortex), responsible for higher order functions, including thought, memory, and sensory processing.

Endodermis

A layer of cells in the roots of land plants that acts as a selective barrier, regulating the passage of substances from the soil into the vascular system.

Xylem

The vascular tissue in plants responsible for transporting water and nutrients from the roots to the rest of the plant.

Root Epidermis

The outermost layer of cells in the root of a plant, which absorbs water and nutrients from the soil.