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Author Topic: How many Oxygen atoms in 1g of vitamin C?  (Read 5854 times)

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tou

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How many Oxygen atoms in 1g of vitamin C?
« on: February 11, 2008, 09:57:55 AM »

Hi

I don't know how to get the correct answer, I've tried but I failed to answer the question.

Question: When you consume 1.00g of vitamin C, how many oxygen atoms are you eating?

Vitamin C: C6H8O6

The answer: 2.05 x 1022

Thank you very much!
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DevaDevil

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Re: How many Oxygen atoms in 1g of vitamin C?
« Reply #1 on: February 11, 2008, 10:14:31 AM »

First of all you should show you at least tried.

But I will give you a start: first calculate how many moles of vitamin C you have in 1.00 gram
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tou

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Re: How many Oxygen atoms in 1g of vitamin C?
« Reply #2 on: February 11, 2008, 10:43:03 AM »

Nr. of moles in vitamin C: 5.68 x 10-3

Then I thought, I should calculate the number of particles, thus the nr. of moles x 6.02 x 1023.

That is: 3.41 x 1021

Thus 1g of vitamin C contains 3.41 x 1021 particles/atoms.

Now I am not sure what the next step is...
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Borek

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Re: How many Oxygen atoms in 1g of vitamin C?
« Reply #3 on: February 11, 2008, 10:58:32 AM »

Almost there :)

Look at the formula - how many atoms of oxygen per 1 molecule?
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tou

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Re: How many Oxygen atoms in 1g of vitamin C?
« Reply #4 on: February 11, 2008, 11:28:34 AM »

Aha... 3.41 x 6 = 2.05 x 1022

Now I wonder why I wasn't able to do it before,  ::) :)

Thank you!
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