In a chemical reaction, sulphur dioxide gas is reacted with Oxygen gas to form sulphur trioxide gas. a) How many moles of sulphur trioxide are produced from 2.5moles of sulphur dioxide gas?

2.5 mol

Explanation:

                         2SO2 + O2     >     2SO3

from reaction   2 mol                            2 mol

given                2.5 mol                         x mol

x = 2.5*2/2 = 2.5 mol

the answer is 0.42 is that is an option. this question provides no info