Answer:
The amount/type of stain
Explanation:
You would want to ensure that the stain was the same in both samples.
The number of carbon atoms in an alcohol affects its solubility in water, as shown in Table 13.3. As the length of the carbon chain increases, the polar OH group becomes an ever smaller part of the molecule, and the molecule becomes more like a hydrocarbon. The solubility of the alcohol decreases correspondingly.
Answer:
I need more information. What is the question?
Physical. you didn't burn it or create a chemical reaction