выберите правильный запись 3 молекул азоту:
1. 3Na
2. 2N3
3. 3N
4. 3N2
вказати формули двоосновних кислот
1. N2CO3
2. HNO2
3. H3PO4
4. H2S
5. H2SI03
6. HCL​
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