1
$\begingroup$

I was doing some problems from the textbook on converting between units using dimensional analysis and I came across this problem.

A vat of Hydrogen Peroxide ($\ce{H2O2}$) contains 455 grams of oxygen atoms. How many molecules of ($\ce{H2O2}$) are in the vat?

Sorry if I didn`t format the question correctly, I am a still a newbie. But how would I set this up? I would not like the answer to this question but I would like some input on how would I get how many molecules of hydrogen peroxide from grams of oxygen atoms? Any help would be much appreciated. Thanks in advance!

$\endgroup$
1
$\begingroup$

A vat of Hydrogen Peroxide ($\ce{H2O2}$) contains 455 grams of oxygen atoms. How many molecules of ($\ce{H2O2}$) are in the vat?

  1. How many moles of oxygen atoms are in 455 gms of oxygen atoms? Let's call the answer $x$.
  2. How many moles of $\ce{O2}$ are in $x$? Let's call the answer $y$.
  3. How many moles of $\ce{H2O2}$ could you make from $y$ moles of $\ce{O2}$? Let's call the answer $z$.
  4. 1 mole of any substance contains Avogadro's number of molecules. How many molecules are in $z$ moles?
$\endgroup$
  • $\begingroup$ Thanks for the response. For #3, is the answer 14.21 moles of Hydrogen Peroxide? $\endgroup$ – ToxicTechnetium Sep 25 '14 at 19:45
  • $\begingroup$ And is the answer to the question 8.56 * 10^24? $\endgroup$ – ToxicTechnetium Sep 25 '14 at 19:46
  • $\begingroup$ @ToxicTechnetium You got it! $\endgroup$ – ron Sep 25 '14 at 19:48

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.