What is the mass percent oxygen in sodium carbonate, #Na_2CO_3#?

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Answer 1 · 2016-07-06T15:24:36

The mass percent pf Oxygen in #Na_2CO_3# is #45.27%#

To fond the mass percent oxygen we begin by finding the mass of the molecule #Na_2CO_3#

#Na = 2*22.99 = 45.98#
#C = 1*12.01 = 12.01#
#O = 3*15.99 = 47.97#

#Na_2CO_3 = 105.96#

Now divide the mass of Oxygen by the total mass of the molecule.

#(47.97)/(105.96) = .4527#

Multiply 100 to convert the decimal to a percent.

#.4527*100= 45.27%#