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Owen
Owen, Attending Physician
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Experience:  I teach medical students and residents with title of Asst. Professor
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CH-mab

Customer Question

Ascorboc acid also known as vitamin C contains the elements carbon, hydrogen and oxygen it's know to contain 40.9% carbon and 4.58% hydrogen by mass

A. What is the empirical formula of vitamin C


B. A mass spectrometry study of vitamin C indicates that it's molar mass is between 170 and 190 Amy what is the molecular formula for vitmamim C?
Submitted: 2 years ago.
Category: Homework
Expert:  Owen replied 2 years ago.

Owen :

Hello

Owen :

The empiracal formula for Vitamin C is C3H4O3 and the Molecular Formular is C3(2)H4(2)O3(2) which is C5H8O6, and the molecular mass is 176.

Owen :

I hope this helps

Owen :

Please click on EXCELLENT Service (smile face)

Owen :

thank you

Customer : Please show your work
Owen :

I see I put C5H8O6 - -----change that to C6H8O6

Owen :

Total mass of C3H4O3 = (12 x 3) + (4 x 1) + (16x 3) = 88 and hence with the Molecular formula of C3(2)H4(2)O3(2) = C6H8O6*1 + 16*3 = 88

176 / 88 = 2

Therefore molecular formula =

Owen :

Then 88 x 2 = 176

Owen :

I hope this helps

Owen :

Do you have any more questions?

Owen :

Carbon = C = 12

Owen :

Oxygen = 16

Owen :

Hydrogen = 1

Owen :

Did you have any additional questions?

Customer : It's a two part question?
Owen :

You asked for the Empiral formula - that is C3H4O3

Owen :

that was part one

Owen :

Then part B - the question was what is the Molecular formula - that is C3(2)H4(2)O3(2) = C6H8O6

Owen :

Then to calculate the molar mass

Owen :

here is the work for that:

Customer : The numbers in the question are all subscripts
Owen :

Yes they are subscripts

Owen :

Sorry I can not put that here on this website like that

Owen :

subscripts do not work on the website - I wish they did

Owen :

Do you have any more questions?

Owen :

Hello - I'm still here

Owen :

Are you there?

Owen :

:)

Owen, Attending Physician
Category: Homework
Satisfied Customers: 55753
Experience: I teach medical students and residents with title of Asst. Professor
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I teach medical students and residents with title of Asst. Professor