Determine which reaction has the highest activation energy.
A. Melting ice
B. Burning charcoal
C. Combusting gasoline
D. Reacting metal and acid

Identify the electromagnets with poles that are reversed from the electromagnet shown above

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.

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1: