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 Read more Chemistry What is the valency and formula of oxalate? Asked by Anonymous Valency is '2' Formula is ' ^(-)O(O=)C-C(=O)O^(-) NB it is similar to Ethanoic(Acetic) Acid, but has an acid functional group at each end. In the event you loved this information and also you would want to acquire more details concerning [[https://mamemm1.online/|หนังอาร์-หนังอาร์]] kindly pay a visit to the web site.