In a chemcial reaction, substances

a- always give off heat energy.
b- keep their original properties.
c-change to form new substances.
d-change from gases to liquid.

In an oxidation-reduction reaction, oxidation is what happens when a reactant

This large tectonic plate is bounded on three sides by whats know as the ring of fire. what is the name of this tectonic plate? a) pacific plate b) eurasian plate c) north american plate d) indo- australian plate plz it's science but there's no option for science so i picked chemistry

Which formula can be used to calculate the molar mass of hydrogen peroxide