4. Describe in words the reaction represented by the equation and include a description of the composition of each kind of molecule.
2 H2 + O2 → 2 H2O

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.

Define dew point. i am writing this part to be able to ask the question

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?