Question 3
The table shows some properties of different substances.
| substance | melting point in °C | boiling point in °C | compressible | has a fixed shape |
|:---:|:---:|:---:|:---:|:---:|
| **A** | −218 | −183 | yes | no |
| **B** | −101 | −34 | yes | no |
| **C** | 0 | 100 | no | no |
| **D** | −7 | 59 | no | no |
| **E** | 113 | 445 | no | yes |
**(a)** Identify **all** the substances in the table that are a gas at 20 °C.
| substance | melting point in °C | boiling point in °C | compressible | has a fixed shape |
|:---:|:---:|:---:|:---:|:---:|
| **A** | −218 | −183 | yes | no |
| **B** | −101 | −34 | yes | no |
| **C** | 0 | 100 | no | no |
| **D** | −7 | 59 | no | no |
| **E** | 113 | 445 | no | yes |
**(a)** Identify **all** the substances in the table that are a gas at 20 °C.
