The label on a tube of medicinal cream claims that it can relieve itchy skin. What would be the most biased source for information about this claim?

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.

Which type of fossil does this image depict?

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?