Answer:
Because they would keep changing? Or Because they were the hottest?
A pH of 7 is neutral in terms of acidity, it means the substance is neither basic nor acidic. A pH above 7 indicates a basic solution, while a pH below 7 indicates acidiity. If a weak base react with a strong acid, the strong acid will release more H⁺ ions than the OH⁻ ions released by the weak base, which means the salt will be acidic, or will have a pH below 7.
The best answer is 2.0
A barometer is used to measure the pressure of a gas
