What is the molar mass of #Fe_2O_3#?

1 Answer
Kayla
Jun 14, 2016

The molar mass of #Fe_2O_3# is #159.70 g/(mol)#

Explanation:

To find the molar mass of a compound you would use the periodic table to find the molar mass of each element separately.

In our case, our two elements are iron and oxygen . Find the molar mass of Fe (55.85 g/mol) and O (16.00 g/mol). Next multiply the molar mass of each element by the number of atoms given in the chemical formula.

For example, there are 2 atoms of Fe (denoted by the subscript). So multiply its molar mass by 2 to obtain #55.85g/(mol) xx2 = 111.70g /(mol)#

We do the same for oxygen. There are 3 atoms of oxygen, so we multiply its molar mass by 3 to obtain #16.00g/(mol) xx3 = 48.00g /(mol)#

Next we just add the final masses of each element together:
#48.00g /(mol)# #+111.70g /(mol)# #= 159.70g /(mol)#

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