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2.0 g of sample containing Na(2)CO(3) an...

2.0 g of sample containing `Na_(2)CO_(3)` and `NaHCO_(3)`, loses 0.248 g when heated to `300^(@)` C, the temperature of which `NaHCO_(3)` decomposes to `Na_(2)CO_(3)` and `H_(2)O`. What is % of `Na_(2)CO_(3)` in mixture?

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The correct Answer is:
0.66
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