Im an experiment , the group that is exposed to the variable to be tested is called the ?

Which statement about the stamps is correct?

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.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: