Здравствуйте Задание 8.3. Вставьте подходящие по смыслу союзы и предлоги.
Of, by, in, about, as well as, and, on
1. Scheele ... Priestley obtained ... oxygen ... heating various compounds ... the element. 2. Priestley recognized that the gas obtained ... him plays an important role ... combustion. 3. Priestley ... Scheele remained adherent... the phlogiston theory... combustion. 4. The combustion... a substance consists ... its combination with oxygen. 5. Oxygen occurs ... the free state ... the atmosphere.

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