Reacciones a balac1ear por método de oxido reducción 1) k2cr2o7+h2o+s/koh+cr2o3+so2
2) fe2o3/co /fe+co2

Can someone me with questions 15 to 17 plz.

What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.

Which element would mostly likely have an electron affinity measuring closest to zero