H2+o2-->
s+o2-->
p+o2-->
CaO+N2O3-->
Li2O+N2O5-->
LiOH+liCl-->
Ca(OH)2+H3PO4-->
Ca(OH)2+p2O5-->
N2OH+N2O3-->
H3PO4+CaO-->
H2CO3+Na2O-->
P2O5+H2O-->
ПОМОГИТЕ ПЖ
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