What is the molar mass of #SO_3#?

1 Answer
Kayla
Jun 14, 2016

The molar mass of #SO_3# is #80.07 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 sulfur and oxygen . Find the molar mass of S (32.07 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.

Since there is only 1 sulfur atom, the molar mass can be taken directly from the periodic table #(32.07 (g)/(mol))#.

Since there are 3 atoms of oxygen, we have to 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)# #+32.07g /(mol)# #= 80.07g /(mol)#

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