A student investigated the mass of sodium carbonate produced by the thermal decomposition of sodium hydrogencarbonate:
2NaHCO3(s)→Na2CO3(s)+H2O(g)+CO2(g) 2\text{NaHCO}_3(\text{s}) \rightarrow \text{Na}_2\text{CO}_3(\text{s}) + \text{H}_2\text{O}(\text{g}) + \text{CO}_2(\text{g}) 2NaHCO3(s)→Na2CO3(s)+H2O(g)+CO2(g)The table below shows the student's results:
| Mass of sodium hydrogencarbonate (g) | Mass of sodium carbonate (g): Trial 1 | Mass of sodium carbonate (g): Trial 2 | Mass of sodium carbonate (g): Trial 3 | Mean mass of sodium carbonate (g) |
|---|---|---|---|---|
| 4.00 | 2.50 | 2.54 | 2.52 | 2.52 |
| 8.00 | 5.02 | 5.08 | 5.05 | 5.05 |
| 12.00 | 7.55 | 7.61 | 4.20 | ZZZ |
| 16.00 | 10.06 | 10.12 | 10.09 | 10.09 |
Identify the anomalous result in the table by stating the mass of sodium hydrogencarbonate and the trial number.
Calculate the mean mass ZZZ of sodium carbonate produced from 12.00 g of sodium hydrogencarbonate. You should exclude the anomalous result from your calculation.
Use your value of ZZZ to calculate the mass of sodium carbonate produced when 150.0 g of sodium hydrogencarbonate is heated.