Answer:
I really dont know i just guessed :(
Explanation:
Sulfur trioxide (SO3) is a chemical compound that is a significant pollutant in gaseous form as it is involved in the production of acid rain.
Industrially, sulfur trioxide is an important precursor to sulfuric acid and is formed from the reaction between sulfur dioxide (SO2) and oxygen gas (O2) as shown in the chemical equation below.
Answer:
i would say D i just did this but i kinda forgot so sorry if im wrong or A
Explanation:
Well you should study how different chemicals work, and make flashcards to carry around or make notes during class to study for later