Question

Sulfur reacts with oxygen according to the following equation: 2S + 3O2 = 2SO3.

if 4 moles of sulfur react with 9.5 moles of oxygen, how many moles of oxygen would remain after the reaction?

Answer 1

Step-by-step explanation:

From the balanced equation you can see that for every TWO moles of S , THREE moles of O2 are needed

so if you have four moles of S you will need SIX moles of O2 ....meaning

you will have ( 9.5 - 6 ) = 3.5 moles of O2 left over