stas0859
stas0859 stas0859
  • 31-05-2023
  • Chemistry
contestada


1. Визначте валентність елементів в оксидах і запишіть їхні назви:
А) РЬО2
Б) Na2 O
В) N2 O5
Г) Cr2 O3
Д) PbO
Е) SO3

Respuesta :

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