a) Fe, 2Fe, 3Fe
b) S, SO₂ lub SO₃, 2SO₂ lub 2SO₃
c) CO₂ 2CO₂, 6CO₂
d) N, N₂ 2N, 3N, 3N₂
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a) Fe, 2Fe, 3Fe
b) S, SO₂ lub SO₃, 2SO₂ lub 2SO₃
c) CO₂ 2CO₂, 6CO₂
d) N, N₂ 2N, 3N, 3N₂