An industrial chemist analyzes a sample of a premium insect repellent spray. Table 1 shows the mass of each substance in a sample of this mixture.
Table 1
| Substance | Mass (g\text{g}g) |
|---|---|
| Ethanol | 118.5118.5118.5 |
| DEET | 32.432.432.4 |
| Lavender oil | 6.36.36.3 |
| Aloe vera extract | 2.82.82.8 |
What general chemical term is given to a mixture that has been designed as a useful product, such as this insect repellent?
Calculate the percentage by mass of DEET in this sample of insect repellent. Give your answer to 1 decimal place.
Ethanol in the mixture can be oxidised to form ethanoic acid. What type of reagent is required to react with ethanol to bring about this chemical change?