Why on the ph scale does a acid go to 0-6.9 but bases go up to 7.1-14. what happened to the 7.0? does it not mean anything or do anything?

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

Ab c or d ? i’m not sure what the answer is

What is the effect of returning nuclear reactor cooling water back into bodies of water?