Could fluorine replace chlorine in the compound, KCl, in a single displacement reaction?

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.

If a solution had a ph of 7 what is the solution

Air can be considered a mixture. which statement does not explain why?