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1 H2CO3
2 Sr(HSO4)2
3 Ca(HCO3)2
4 Ba(H2PO4)2
5 Si3N4
6 N2O4
7 N2O5
8 AsH3
9 BrF3
10 CO2
2
4
5
7
3
6
9
1
8
10