Which of the following solution has a pH<7? * I. NaF
II. Fe(NO3)3
III. CaSO3
A. I and Ill
B. Il only
C. Ill and Ill
D. I and Il

WILL GIVE BRAINLIEST!!

Answer ozone (o3) is made of three atoms of oxygen, it is a molecule;

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.