Ajutatima varog
stabileste valenta elementului in baza formulei chimice.(cunoscind valenta altui element sau grupe de elemente)
a) N₂O Cu(OH)₂ Al₂(SO₄)₃
B) SO₂ Al₂ O₃ Ca(OH)₂
C) SO₃ CaCl₂ Fe Cl₃

1

Răspunsuri

2014-09-10T17:42:41+03:00
A)O are -2 iar N are 1
  (OH) are -1 Cu are 2
  SO4 are -2 Al are 3
B)O are -2 S are 4
  O are -2 Al are 3
  OH are -1 Ca are 2
C) O are -2 S are 6
   Cl are -1 Ca are 2
   Cl are -1 Fe are 3

Sper sa nu fi gresit

2 5 2