Which material needs extra energy to enable the movement of free electrons? a. conductor b. semiconductor c. insulator d. element

What can be the use of smoke transformed into liquid?

How much energy is made when a pice of wood burns. how do you know

The boiling point of propanoic acid is higher than that of 1-butanol because: propanoic acid has a higher molecular weight than 1-butanol. propanoic acid is more soluble in water than 1-butanol. propanoic acid is a better hydrogen bond donor than 1-butanol. propanoic acid forms hydrogen bonded dimers and 1-butanol does not. 1-butanol forms hydrogen bonded dimers and propanoic acid does not.