You can find the answers (reshebnik) for various 8th-grade chemistry workbooks from 2017 online through several educational platforms. Since there are different authors, here are the most common resources: Popular Reshebniks for 2017 Chemistry Workbooks
Цифровые рабочие тетради к учебникам «Просвещения» reshebnik po tetradi khimii 8 klass 2017 onlain
Answers for the workbook accompanying this curriculum are often available on MegaResheba. You can find the answers (reshebnik) for various