Final answer:
The smallest amount of charge in taste that we can detect is about 0.01 percent.
Step-by-step explanation:
The smallest amount of a charge in taste that we detect is about 0.01 percent (a)). This means that we can detect a taste when the concentration of the substance is at least 0.01% of the total mass. For example, if a solution contains 1 gram of a particular taste molecule in 10,000 grams of solvent, we would be able to detect the taste.