Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: meredypark3 on May 09, 2017, 04:44:42 PM
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Hello, I am unsure of the process to answer the following chemistry question:
If a sample of Fe2S3 contains 1.25×1015on atoms what is the mass in grams?
So far, I have got [tex] 1.25×10^{15} atoms × \frac {1 molecule} {2 atoms Fe} × \frac {1 mol} {6.02 × 10^{23}} × 201.88g [/tex]
However, I know that my values are incorrect as it does not match up with the answer I was given.
Thank you!
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Atoms of Fe or atoms in general?
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Sorry for the typo, it's 1.25 × 1015 iron atoms
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OK, where did you got 201.88 from? Or is it a typo too?
What is the result you got, what is the answer you were given? In general logic behind your conversion factors is OK, even if you are a bit lousy about units and typos.
You can get [itex]spaces~in~\LaTeX[/itex] with a tylde (~).
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Ahhh it was supposed to be 207.88g which would be the molar mass of Fe2S3