What does a scientist do when making an observation

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

Chemical kinetics what was the rate of reaction in trial 3? choose the closest answer.

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.