Please, I need at least accurate answers for my Sound Knowledge Check for my Science class.

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

The fact that the total amount of energy in a system remains constant is a(n)

What is the vapor pressure of a solution with a benzene to octane?