Question

The molar mass of iron oxide (Fe2O3) is 159.7 g/mol. What is the correct way to write the molar mass of iron oxide as a conversion factor?

Answer 1

the answer is C 159.7g Fe2O3/1 mol Fe2 O3

Answer 2

When writing the conversion factor for the molar mass of Fe2O3, it will be written as:

• 159.7 g Fe2O3 / 1 mol

What is the conversion factor of iron oxide (Fe2O3) whose molar mass is 159.7 g/mol?

The molar mass of a substance is the mass of one mole of that substance.

The molar mass of of iron oxide (Fe2O3) is 159.7 g/mol.

This means that 1 mole of iron oxide (Fe2O3) has a mass of 159.7 g.

Therefore, in writing the conversion factor, it will be written as:

• 159.7 g Fe2O3 / 1 mol

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