anonymous
  • anonymous
Styrene, the building block of polystyrene, is a hydrocarbon, a compound consisting only of C and H. If 0.438 g of styrene is burned in oxygen and produces 1.481 g of CO2 and 0.303 g of H2O, what is the empirical formula of styrene?
Chemistry
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
abb0t
  • abb0t
Start by writing down the equation for combstion and styrene.
abb0t
  • abb0t
C\(_8\)H\(_8\) + O\(_2\) \(\rightarrow\) CO\(_2\) + H\(_2\)O
abb0t
  • abb0t
Next, find your moles of water and carbon dioxide.

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

abb0t
  • abb0t
I'll just wait for you to come back. I dont want to explain something if you may not come back.
anonymous
  • anonymous
Okay :)
anonymous
  • anonymous
Hold on
anonymous
  • anonymous
Now what? o:
abb0t
  • abb0t
Well, did you find the moles of water and carbon dioxide?
anonymous
  • anonymous
I got 0.034 mol CO2 & 0.017 mol H20
abb0t
  • abb0t
Ok, now divide by the higher of the two values, you should get a integer value.
abb0t
  • abb0t
intuitively, you should see that your ratio is 1:2
anonymous
  • anonymous
by 0.017?
anonymous
  • anonymous
Ohhhh
abb0t
  • abb0t
yes. so you know that your ratio of water and carbon dioxide is 1:2, correct. Are you with me so far.
anonymous
  • anonymous
Yes (:
abb0t
  • abb0t
Therefore, you'll notice that you have a 2:2 ratio of hydrogen AND carbon. Remember your formula from above.
anonymous
  • anonymous
So would I be left with C2O4 & H2O?
abb0t
  • abb0t
2CO\(_2\) + H\(_2\)O notice you have 2:2 which is the same thing as 1:1 ratio. Therefore, your formla for styrene must be 1:1 But, let's check that.
abb0t
  • abb0t
2 for Carbon and 2 for hydrogen. YES.
anonymous
  • anonymous
Ok :) I'm following
abb0t
  • abb0t
Now, what you do is repeat the same process above with CH and O\(_2\) (on the left side).
abb0t
  • abb0t
because NOW you know that you have Carbon AND hydrogen.
abb0t
  • abb0t
So, find the moles of CH and O\(_2\). Can you do that?
abb0t
  • abb0t
btw, if at any point in time, you're confused as to what I'm doing, please ask.
anonymous
  • anonymous
You mean by balancing?
abb0t
  • abb0t
Well, you can do it by balancing, but just to be sure of your answer, you want to do what you did on the other side (on the right). Finding moles by calculation.
abb0t
  • abb0t
However, you don't know the mass, so just give it a variable, say \(x\). (12.01 + 1.008)\(x\) = approximate molecular mass of styrene.
anonymous
  • anonymous
Oh okay, I understand now :) The ratio is C to H is 1 so its CH
abb0t
  • abb0t
Yes.
abb0t
  • abb0t
that is the \(empirical\) formula, not molecular formula. Do not confuse them.
anonymous
  • anonymous
Yeah, thank you so much :)

Looking for something else?

Not the answer you are looking for? Search for more explanations.