An Experiment with ⁵⁵Co Takes 47

question 56

Multiple Choice

An experiment with ⁵⁵Co takes 47.5 hours.At the end of the experiment,1.90 ng of ⁵⁵Co remains.If the half life is 18.0 hours,how many ng of ⁵⁵Co were originally present?

• A)2.47 ng
• B)3.05 ng
• C)3.28 ng
• D)11.8 ng

---

Definitions:

Evolutionary Forces

Processes such as natural selection, genetic drift, mutation, and gene flow that contribute to the changes in the genetic composition of populations over time.

Structuralism

A theoretical paradigm in anthropology and sociology that posits elements of human culture must be understood in terms of their relationship to a broader system or structure.

Behaviorism

A theory in psychology that emphasizes the importance of observable actions and behaviors over internal processes.