Avogadro constant

The Avogadro constant ($N_{A}$) .

Its value (in Le Système international d'unités 2002 CODATA value) is:

Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \left. N_A = 6.022 1415(10) \times 10^{23} mol^{-1} \right.}