Answers

2014-06-21T18:31:51+05:30
Na = 43.4%
C = 11.3
O = 43.3%
relative number of moles
of Na = 43.4/23 = 1.88
of C = 11.3/12 = 0.94
of O = 43.3/16 = 2.71
simple ratio of moles 
of Na = 1.88/0.94 = 2
of C = 0.94/0.94 = 1
of O = 2.71/0.94 = 2.87 ~ 3
empirical formula = Na2CO3

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