A urethane is a molecule in which a carbonyl group is part of an ester and an amide (it is an amide in one direction, an ester in the other direction). It is formed from the reaction of an isocyanate with an alcohol. A polyurethane is a polymer formed between a diisocyanate and a diol. Draw curved arrows to show the movement of electrons in this step of the mechanism of the formation of a polyurethane.

The answer for #3 is c but i don't know why

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.

Compare and contrast refraction of light and sound will give brainliest