What is $"sulfur trioxide"$ ?

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Answer 1 · 2017-04-19T17:11:40

$"Sulfur trioxide"$ , or $"sulfur(VI) oxide........."$

$SO_2(g) + 1/2O_2(g) rarr SO_3(g)$

This reaction is performed industrially on huge scales, as a precursor to sulfuric acid, i.e.

$SO_3(g) + H_2O(l) rarr H_2SO_4(aq)$ .......

What is "sulfur trioxide""sulfur trioxide"?