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Авогадро саны (NA)
The number of atoms in 12 grams of carbon 12. The number of atoms in a gram-atom (mass in grams numerically equal to the atomic weight) or the number of molecules in a gram-molecule (mass in grams numerically equal to the molecular weight.)
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(basketball term) any ball that is not live; occurs after each successful field goal or free-throw attempt, after any official's whistle or if the ...
