Sulfur reacts with oxygen to produce sulfur trioxide gas. balance the equation. __s+) > __so(sub3)

2S + 3O2 ==> 2SO3  
Let's start off with the unbalanced equation and count atoms of each element on both sides of the arrow.  
S + O2 ==> SO3  
There's 1 sulfur atom on both sides which is good. However, there's 2 oxygen atoms on the left and 3 on the right. So calculate the Least common multiple (LCM) of 2 and 3 which is 6. And adjust the coefficients on both sides to have 6 oxygen atoms on each side, giving: 
S + 3O2 ==> 2SO3  
Now we have 6 oxygen atoms on each side which is good, but there's only 1 sulfur atom on the left and 2 on the right. Since the LCM of 1 and 2 is 2, all we need to do is adjust the coefficient on the left to get 2 sulfur atoms there. So:
 2S + 3O2 ==> 2SO3  
We now have 2 sulfur atoms on each side of the equation and 6 oxygen atoms on each side, so the resulting equation is balanced.

If you open the bottle of perfume then nothing but the smell will come out of it and yes it is a type of gas smell because it’s say it in english so i can understand better and you