October 2021 0 8 Report
Докончить ур-е реакций 1)Ca+P=
2)HNO3+Fe2O3=
3)Са+N2=
4)HNO3+Na2CO3=
5)H3Po4+Ca(OH)2=
6)P2O5+H2O
7)H3PO4+Mg=
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