Chapter 19, Problem 19.91SP

Interpretation Introduction

Interpretation:

With every half-life the concentration of the reactant decreases to half of the initial concentration.

Concept introduction:
  $Cr$ is a radioactive isotope. All radioactive reactions are 1^st order reaction.

Given:

20.0 mL of blood that had been radioactively labelled with $Cr$

Activity of $Cr$ in 20.0 mL of blood = $4.10\mu Ci/mL$

Radiation level determined later= $0.00935\mu Ci/mL$

  $t_{1/2}=27.7$ days

To determine:

The volume of blood in patient