One way of obtaining pure sodium carbonate is through the decomposition of the mineral trona, Na5(CO3)2(HCO3)⋅2H2O, as shown in the following reaction:
2Na3(CO3)(HCO3)⋅2H2O(s) → 3Na2CO3(s) + CO2(g) + 5H2O(g)
When 15 metric ton (1 × 103 kg) of trona is decomposed, 11 metric ton of Na2CO3 is recovered. What is the percent yield of this reaction? (1 metric ton = 103 kg)