Tritium Is Radioactive and Decays by a First Order Process

question 65

Multiple Choice

Tritium is radioactive and decays by a first order process with a half-life of 12.5 yr. If an experiment starts with 1.00×10 ^{- 6} mol of tritium, how much is left after 4.5 yr.?

• A) 1.1×10 ^{- 7} mol
• B) 7.8×10 ^{- 7} mol
• C) 3.6×10 ^{- 7} mol
• D) 4.8×10 ^{- 6} mol
• E) 1.0×10 ^{- 9} mol

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Definitions:

Self-efficacy

Refers to an individual's belief in their capacity to execute behaviors necessary to produce specific performance attainments.

Experience Builds

The accumulation of knowledge or skill that comes from direct participation in events or activities over time.

Reinforcement Theory

A concept in psychology suggesting that behavior can be shaped or modified by its consequences, through rewards or punishments.

Environmental Consequences

The outcomes or impacts of actions and decisions on the natural environment, including effects on air, water, and land.