
Concept explainers
Interpretation:
The pressure present inside the flask after
Concept Introduction:
Radiocarbon dating: The dynamic equilibrium exists in all living organism by exhaling or inhaling, maintain the same ratio of
Half-life period: The time required to reduce to half of its initial value.
Formula used to calculate half-life:
Ideal gas equation:
An ideal gas equation is,

Answer to Problem 21.73QP
The value of pressure exist in the flask is
Explanation of Solution
Given: Half-life of Bismuth
The decay constant is
Calculate the number of Bismuth atoms in the flask:
Mass of
Number of Bismuth atoms in the flask is,
The number of Bismuth atoms
Predict the equation from first order decay process:
By comparing the values,
The number of Bismuth atoms
Atoms of Helium is same as Atoms of Bismuth decayed
Atoms of He emitted is given as:
Conversion of Helium atom into mole:
Mole of Helium
The mole of Helium emitted is
Calculate the pressure in the flask:
An ideal gas equation is,
By substituting the known values into the above equation is,
The value of pressure exist in the flask is
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Chapter 21 Solutions
EBK GENERAL CHEMISTRY: THE ESSENTIAL CO
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