Which of the following changes has H = + ve

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 atomic number, or number, is the described as the number of in the nucleus of an chemical element.

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?