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\sect{Chemical equilibrium A---A+e}


${N}$ atoms type ${A}$ were put in a tank with volume ${V}$. The
system got to a state of thermochemical equilibrium
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\[A  A^{+}+e^{-}\]
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Express the percent of the ionized atoms through the mass
${\mathsf{m}_{e}, \mathsf{m}_{A}}$,ionization energy
${\varepsilon}$, temperature ${T}$, and gas density  ${\frac{N}{V}}$.





