Question

what is trimer of sulfur trioxide​

Answer 1

Answer:

Upon condensation of the gas, absolutely pure SO3 condenses into a trimer, which is often called γ-SO3. This molecular form is a colorless solid with a melting point of 16.8 °C. It adopts a cyclic structure described as [S(=O)2(μ-O)]3. ... Liquid sulfur trioxide has a vapor pressure consistent with the gamma form.