A student investigated the rate of reaction between excess hydrochloric acid and calcium carbonate chips. The mass of the reaction flask and its contents was recorded over time using a digital balance to monitor the escape of carbon dioxide gas, as shown in the table below:
| Time / s\text{s}s | Mass of flask and contents / g\text{g}g |
|---|---|
| 0 | 100.00 |
| 10 | 99.15 |
| 20 | 98.60 |
| 30 | 98.22 |
| 40 | 98.00 |
| 50 | 97.85 |
| 60 | 97.75 |
Identify the average rate of reaction, in terms of mass loss per second, during the first 40 seconds of the reaction in g s−1\text{g}\text{ s}^{-1}g s−1.
0.0500.0500.050
0.0220.0220.022
2.452.452.45
20.020.020.0
