4 Na+O2--->2 Na2O
2 K+S--->K2S
2 Ca+O2--->2 CaO
P4+5 O2--->P4O10
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Verified answer
4 Na+O2--->2 Na2O
2 K+S--->K2S
2 Ca+O2--->2 CaO
P4+5 O2--->P4O10