Dna consists of a double helix. what is the non-covalent attraction that to maintain the double helix structure? a. dipole-dipole interaction b. hydrogen bonding c. london dispersion forces d. ion-dipole interactions

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.