Which statement is true of the following reaction? H2 +02-> H+ + O2-
It is balanced for oxidation state and for number of atoms.
It is not balanced for oxidation state or for number of atoms.
It is not balanced for oxidation state but is balanced for number of atoms.
It is balanced for oxidation state but is not balanced for number of atoms.

Complete the sentence. the lower the hydrogen ion concentration, the the ph. higher lower closer to 7 closer to 0

Can someone me with questions 12 and 13 plz.

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.