January 2019 2 7 Report
Dobierz współczynniki w równaniach reakcji spalania w tlenie i chlorze:

Cu + O₂ ------- CuO
Na + O₂ ------- Na₂O
H₂ + O₂ -------- H₂O
Al + O₂ --------- Al₂O₃
Ca + O₂ --------- CaO
Cu + Cl₂ -------- CuCl₂
H₂ + Cl₂ -------- HCl
Fe + Cl₂ -------- FeCl₃
Al + Cl₂ -------- AlCl₃
Ca + Cl₂ -------- CaCl₂
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