Q: There are 3.40 moles of each reactant present initially.
Equation: 2SO2 + O2 -- 2SO3
Which is the limiting reactant?
Well, I figured out that SO2 ends up being 3.4 mol. of SO3 and that O2 ends up being 6.8 mol. of SO3.

So, the answer was SO2, BUT.. Now it asks me, "Calculate the moles of SO3 that would form?"

Would the answer simply be 3.4 mol. of SO3?
I'm a little paranoid to answer, because my Chemistry program deducts points for a wrong answer. Please tell me if I'm correct?

Question

Q: There are 3.40 moles of each reactant present initially. 
Equation: 2SO2 + O2 --> 2SO3
Which is the limiting reactant? 
Well, I figured out that SO2 ends up being 3.4 mol. of SO3 and that O2 ends up being 6.8 mol. of SO3.

So, the answer was SO2, BUT.. Now it asks me, "Calculate the moles of SO3 that would form?"

Would the answer simply be 3.4 mol. of SO3?
I'm a little paranoid to answer, because my Chemistry program deducts points for a wrong answer. Please tell me if I'm correct?

anonymous · Answer

As far as i understand, u're right :)

wolfe8 · Answer

After you found the number of moles using mass, did you divide by the coefficient first?

anonymous · Answer

Ooooohhh... Your comment + re-reading an example in my book like 5 times helped me figure out what I was doing wrong. Thanks ^ ^

wolfe8 · Answer

You're welcome.