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Uses: Used to season food (during food preparation and at the table), also used in the … Variables : A symbol which may be assigned different numerical values is known avariable.. Need assistance? Name the scientist who laid the foundation of chemical sciences. Need assistance? Chemical … The tube is sealed and weighed precisely. Formula of Compounds For Ex: Water(H 2 O),carbon dioxide(CO 2),sulphur dioxide(SO 2),ammonia(NH 3), methane(CH … or own an. As already stated, a chemical formula is a symbolic expression signifying the number of atoms present in a molecular substance. NCERT Book Class 9 Science Chapter 3 Atoms and molecules. Question. Contact. Also considered a calcium supplement.. 2. In this list Compound name, Chemical formula of the compound and its uses are given. Academic Partner. If you are a student of class 9 who is using NCERT Textbook to study Science, then you must come across Chapter 3 Atoms … Chemical Formula. 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