Editing Answers About Chemistry

Revision as of 11:22, 20 September 2026 by RosieDillon1891 (talk | contribs) (Replaced content with "<br>Nitrogen and oxygen. The atmosphere ( air) is composed of a mixture of gases . viz., Nitrogen ; 79 % Oxygen ; 20 % The remaining 1% contains, water ,carbon dio<br>Read...")
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