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Topic: Stoichiometry question  (Read 2126 times)

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Offline KH502

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Stoichiometry question
« on: April 29, 2015, 06:41:06 AM »
The number of sulfur atoms in 0.01 mmoles of carbon disulfide (CS2) is:
A. 12.04 × 10^18
B. 6.02×10^23
C. 12.04×10^21
D. 10^21
E. 12.04 × 10^-21

Here is what I did:
0.01 mmoles = 0.00001 moles
n(S)=n(CS2)*2= 0.00002 moles
Number of sulfur atoms = 0.00002 moles *(6.022E+23)= 1.2E+19

I can't seem to to find my mistake. Can someone help?
Thanks.

Offline Hunter2

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Re: Stoichiometry question
« Reply #1 on: April 29, 2015, 06:49:44 AM »
I got the same result. So something wrong with this question.

Offline thetada

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Re: Stoichiometry question
« Reply #2 on: April 29, 2015, 06:50:46 AM »
You have the right answer but it's expressed differently in the available options.

Offline Hunter2

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Re: Stoichiometry question
« Reply #3 on: April 29, 2015, 06:56:22 AM »
yes your right. ;D

Offline KH502

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Re: Stoichiometry question
« Reply #4 on: April 29, 2015, 07:02:47 AM »
How did I not see that. ;D Well, Thanks!

Offline thetada

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Re: Stoichiometry question
« Reply #5 on: April 29, 2015, 07:15:59 AM »
No worries :-)

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