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

Answer 1

Jeremiah Adams

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%#

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Answer 2

Peyton Adams

Finding the molar mass of the compound and then calculating the mass of oxygen in relation to the total mass of the compound are the first steps in calculating the mass percent of oxygen in sodium carbonate (Na2CO3). The molar mass of Na2CO3 is as follows: 2(Na) + 1(C) + 3(O) = 2(22.99 g/mol) + 12.01 g/mol + 3(16.00 g/mol) = 105.99 g/mol. The mass percent of oxygen is therefore approximately 45.27%.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.