Q
QuestionChemistry

The molar mass of iron oxide (Fe^2O3) is 159.7g/mol. What is the correct way to write the molar mass of iron oxide as a conversion factor?
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Answer

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Step 1
: Identify the given information and the desired conversion factor.

mathrm{Conversion~Factor} = frac{mathrm{(unit)}}{mathrm{(unit)}}
We want to express this as a conversion factor in the form:

Step 2
: Determine the proper form for the conversion factor.

mathrm{Conversion~Factor} = frac{1~mol}{159.7~g}
In this case, we want the conversion factor to relate the mass of iron oxide to the number of moles. Therefore, the conversion factor should be:

Final Answer

The molar mass of iron oxide as a conversion factor is: mathrm{Conversion~Factor} = frac{1~mol}{159.7~g} This conversion factor can be used to convert the mass of iron oxide to moles or vice versa.