Question

A scientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. The scientist repeats the experiment several times, each time increasing the amount of acid used.

The dependent variable in the experiment is the:

initial mass of the metal
final mass of the metal
amount of acid used
washing the metal

Answer 1

b

Step-by-step explanation:

Answer 2

Answer: Option (b) is the correct answer.

Step-by-step explanation:

When acid is reacted with metal then there will be some chemical reaction that has taken place.

Also, each time amount of acid is increased so, it will affect the mass of metal atom by consuming it.

Hence, the final mass of metal obtained will be dependent on the amount and number of times acid has been poured on it.

Therefore, we can conclude that dependent variable in the experiment is the final mass of the metal.