The correct answer is A. It should be recorded in milligrams
Explanation:
In an experiment, one of the most important elements is the units used to measure substances, because these are different depending on the substance, and the purpose of the experiment.
In the case presented, it is correct Alai decided to use milliliters to measure the volume of water because the milliliter (mL) is a unit that measures the volume of liquids. However, he cannot use milliliters to measure the mass of salt because milliliters measure volume rather than mass. Instead, he should use milligrams as this measure mass of the substance and similar to milliliters is appropriate for small quantities of a substance. Thus, Alai's salt measurement is wrong because it should be recorded in milligrams.
