Interpretation:
The number of
isotopes at the beginning and at the end of
days is to be calculated.
Concept Introduction:
Radium is radioactive because although it is a noble gas, its mass is so large that its nucleus is unstable and emits radiation when it decays.
According to the quantum theory, it is impossible to determine when or how an atom will decay as it is a random process of energy emission.
Answer to Problem 78AP
Solution:
Explanation of Solution
Given information: The partial pressure of
is
Dimensions of the basement are
First, calculate the number of
The volume of basement is calculated as follows:
The number of moles of air is calculated as follows:
The number of moles of radon is calculated as follows:
The number of
atoms at the beginning is calculated as follows:
The rate constant is calculated as follows:
Consider the number of radon atoms after time
From the equation of first order kinetics, the value of
The numbers of
isotopes at the beginning and at the end of
days are
and
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Chapter 21 Solutions
Loose-leaf Version For Chemistry
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