Answer:

Explanation:
Hello,
In this case, since hydrochloric acid and barium hydroxide are in a 2:1 molar ratio, for the neutralization, the following moles equality must be obeyed:

In such a way, in terms of molarities and volumes, we can compute the required volume of hydrochloric acid as shown below:

Besr regards.
Matter can only me transformed, but not created or destroyed.
Answer:
region 2 and region 3
Explanation:
you can tell by the color of the land my friends^^