A student heated 5.00 g5.00\text{ g}5.00 g of zinc carbonate in a crucible to produce solid zinc oxide and carbon dioxide gas.
The reaction is:
zinc carbonate→zinc oxide+carbon dioxide \text{zinc carbonate} \rightarrow \text{zinc oxide} + \text{carbon dioxide} zinc carbonate→zinc oxide+carbon dioxideThe student weighed the crucible and its contents after each minute of heating. The results are shown in the table below:
| Total heating time (minutes) | Mass of crucible and contents (grams) |
|---|---|
| 0 | 23.50 |
| 1 | 22.62 |
| 2 | 22.05 |
| 3 | 21.81 |
| 4 | 21.74 |
| 5 | 21.74 |
Find the minimum heating time needed for all of the zinc carbonate to be completely decomposed.
Calculate the total mass of carbon dioxide gas produced by decomposing the zinc carbonate.