Which of the following is a renewable resource: copper, aluminum, peanut oil, natural gas?

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.

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

One similarity and one difference between an element and a mixture of elements