1. Английский язык
  2. массовая доля углерода 85.7 массовая

массовая доля углерода 85.7 массовая доля водорода 14.3 относительная плотность по водороду 43. найти молекулярную формулу

alinasad337 alinasad337    1   19.02.2022 20:28    1

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