What are the names of the two levels?

Select two correct answers.

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.

How have the greenhouse gasses increased from the year 2000 to 2018

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?