The general reaction is as follows: Sulfur trioxide is a nonmetal oxide. In its liquid for it is colourless and fumes in air at ambient conditions. Therefore there is 3 atoms of oxygen. Sulfur dioxide in the air comes mainly from activities such as the burning of coal and oil at power plants or from copper smelting. The SI base unit for amount of substance is the mole. Sulfur dioxide is a colorless gas with a pungent odor. Sulfur trioxide exists in a number of modifications that differ in molecular species and crystalline form. The burning of coal usually produces sulfur dioxide, SO 2 (g), and sulfur trioxide, SO 3 (g), which are major air pollutants. Therefore, the chemical reaction can be shown as below: Trioxide has the prefix of tri, meaning "3". Sulfur trioxide - SO_"3". Sulfur is S. Simple enough. 1 mole is equal to 1 moles Sulfur Trioxide, or 80.0632 grams. Combine them and I get SO_"3". The molecular formula for Sulfur Trioxide is SO3. Reaction between sulfur trioxide and water: Acids are formed when nonmetal oxides react with water. Note that rounding errors may occur, so always check the results. It is a liquid when under pressure, and it dissolves in water very easily. How I came to this conclusion: I noticed that the compound consists of non-metals, therefore it must be a covalent compound - meaning I use prefixes for compounds. Sulfur trioxide is a chemical compound which is represented by chemical formula SO 3. In nature, sulfur … Structure, properties, spectra, suppliers and links for: Sulfur trioxide, 14265-45-3. On reacting with water, it forms sulfuric acid. 76 Write the general formula for the homologous series that includes … Sulfur Trioxide is a neutral molecule because it has the same amount of electrons as protons. Sulfur trioxide: SO_"3". Sulfite has two extra electrons though making it an ion because it has a charge, anion because it has a negative charge. Both SO 2 (g) and SO 3 (g) react with water in the air to form acids. Use this page to learn how to convert between moles Sulfur Trioxide and gram.