75% of Cl atoms have a mass number of 35, whilst the remaining 25% have a mass number of 37. What is the relative atomic mass of chlorine?

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.

Why are pipes bursting in the in extremely cold weather?

How does the motion of particles in a gas change as the gas cools