Uzupełnij reakcję .
1 . Ca + O2 => CaO
2 . H2 + S => H2S
3 . Na + O2 => Na2O
Uzupełnij reakcję .
1 . Ca + O2 => CaO
2 . H2 + S => H2S
3 . Na + O2 => Na2O
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1 . 2Ca + O2 => 2CaO
2 . H2 + S => H2S
3 . 4Na + O2 => 2Na2O
1. 2Ca + O₂ -> 2CaO
2. H₂ + S -> H₂S
3. 4Na + O₂ -> 2Na₂O