Question 19
(19) The table below shows what happens in the chemical equation, $A+B\rightarrow C+D$, and the time it takes for the reaction to take place.
| Reaction | Reactant A (gram) | Reactant B (gram) | Product C (gram) | Product D (gram) | X (gram) | Time (minute) |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | 10 | 15 | 18 | 7 | - | 20 |
| 2 | 10 | 15 | 18 | 7 | 1 | 12 |
What is substance X? [1 mark]
| Reaction | Reactant A (gram) | Reactant B (gram) | Product C (gram) | Product D (gram) | X (gram) | Time (minute) |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | 10 | 15 | 18 | 7 | - | 20 |
| 2 | 10 | 15 | 18 | 7 | 1 | 12 |
What is substance X? [1 mark]