What is the molar mass of #Fe_3(PO_4)_2#?

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Answer 1 · 2015-12-18T03:09:03

#357.475"g/mol"#

Take the sum of the molar masses of each individual element.

There are:

#3# #"Fe"# atoms
#2# #"P"# atoms
#8# #"O"# atoms

Notice that the term outside the parentheses can be multiplied into the parentheses to show how many atoms there are of each element in the compound.

#3xx"molar mass of Fe"=3xx55.845"g/mol"=167.535"g/mol"#

#2xx"molar mass of P"=2xx30.974"g/mol"=61.948"g/mol"#

#8xx"molar mass of O"=8xx15.999"g/mol"=127.992"g/mol"#

The sum of the individual molar masses is

#color(red)(357.475)" g/mol"#