Составление формул по валентности
#химияснуля
#составлениеформул#валентность
4 months ago 04:55:59 1
![БУХГАЛТЕРСКИЕ ПРОВОДКИ с нуля: ПОЛНЫЙ КУРС за 5 часов [ТЕОРИЯ 📚 + ПРАКТИКА 💻]](https://sun9-25.userapi.com/gSSLCLoeYrl-g9aTvhO1_rp0rWF1fRhcBZExmw/DEJzm2S9eQA.jpg)
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