вычислите кол-во молекул в молях
а)0,2
б)2,0
в)5,0
₋₋₋₋₋₋₋₋₋₋₋₋₋₋
выразите в молях:
а)12,04*10²³ атомов железа
б)6,02+10²² атомов углерода
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