Finding Empirical and Molecular Formula  [ENDORSED]

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Christina Inchuachan 1C
Posts: 7
Joined: Wed Nov 15, 2017 3:04 am

Finding Empirical and Molecular Formula

Postby Christina Inchuachan 1C » Sun Apr 15, 2018 8:53 pm

How do you find the empirical and molecular formula if the molecular structure is given? There was a whole section on it in the first chem exam.

Yuliana Garcia 1a
Posts: 6
Joined: Fri Apr 06, 2018 11:02 am

Re: Finding Empirical and Molecular Formula

Postby Yuliana Garcia 1a » Sun Apr 15, 2018 8:58 pm

Since the empirical and the molecular formula are the same, we look at the molecular structure to find the molecular formula since it shows the actual number of atoms and then to find the empirical formula we use the molecular formula. Then we divide the molecular formula by the highest common denominator and if there is none then the empirical and molecular formula should be the same.

Shione Nakahara 1F
Posts: 31
Joined: Fri Apr 06, 2018 11:04 am

Re: Finding Empirical and Molecular Formula  [ENDORSED]

Postby Shione Nakahara 1F » Sun Apr 15, 2018 9:01 pm

Count the atoms to get the molecular formula. The empricial formula is the simplified ratio!

tmehrazar
Posts: 39
Joined: Fri Apr 06, 2018 11:04 am

Re: Finding Empirical and Molecular Formula

Postby tmehrazar » Sun Apr 15, 2018 9:01 pm

I think you count how many of each atom you have for the molecular formula and then simplify that by it's least common denominator.

chemlover
Posts: 31
Joined: Fri Apr 06, 2018 11:03 am

Re: Finding Empirical and Molecular Formula

Postby chemlover » Sun Apr 15, 2018 9:06 pm

So if they are both the same and they can't be divided, they just remain the same?

Odalys Cuevas 1C
Posts: 31
Joined: Fri Apr 06, 2018 11:02 am

Re: Finding Empirical and Molecular Formula

Postby Odalys Cuevas 1C » Sun Apr 15, 2018 9:15 pm

If there are 2 lines showing a bond do you have to add 2 to both of the elements? Also should you look at the lines or at the number of elements?

Ignacio Ramirez 1J
Posts: 31
Joined: Tue Nov 14, 2017 3:02 am

Re: Finding Empirical and Molecular Formula

Postby Ignacio Ramirez 1J » Tue May 29, 2018 5:28 pm

You should look at the number of elements, not the bonds. Bonds are not for finding the empirical or molecular formula.


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