Finding the empirical formula of iron oxide?


So, if you assume that all the mass of iron took part in the reaction, you can say that the difference between the mass of the product and the mass of iron will represent the mass of oxygen.

##m_”product” = m_”iron” + m_”oxygen”##

##m_”oxygen” = “118.37 g” – “85.65 g” = “32.72 g”##

Now that you know how much iron and how much oxygen you have in the iron oxide, you can use the two ‘ respective molar masses to figure out how many moles of each you have.

For iron, you will have

##85.65color(red)(cancel(color(black)(“g”))) * “1 mole Fe”/(55.845color(red)(cancel(color(black)(“g”)))) = “1.534 moles Fe”##

For oxygen, you will have

##32.72color(red)(cancel(color(black)(“g”))) * “1 mole O”/(16.0color(red)(cancel(color(black)(“g”)))) = “2.045 moles O”##

To determine the empirical formula of the iron oxide, you need to find the smallest whole number ratio that exists between the two elements in the compound.

To do that ,divide both values by the smallest one.

##”For Fe: ” (1.534color(red)(cancel(color(black)(“moles”))))/(1.534color(red)(cancel(color(black)(“moles”)))) = 1##

##”For O: ” (2.045color(red)(cancel(color(black)(“moles”))))/(1.534color(red)(cancel(color(black)(“moles”)))) = 1.333##

To get the smallest whole number ratio that exists between the two elements, multiply both values by ##color(blue)(3)##. This will help you get rid of the decimal fraction for oxygen.

The empirical formula of the iron oxide will thus be

##(“Fe”_1″O”_1.333)_color(blue)(3) implies color(green)(“Fe”_3″O”_4)##

Show more

Calculate Your Essay Price
(550 words)

Approximate price: $22

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
The price is based on these factors:
Academic level
Number of pages
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more

Order your essay today and save 10% with the coupon code: best10