How many moles of KBr are needed to make 4.0 L of a 0.75M KBr solution?

If the water vapor content stays the same and the temperature drops, then the relative humidity increases. its vise versa.if the water vapor content stats the same and the temperature rises, the relative humidity decreases. so, yes, i'd say that temperature and humidity have a strong relationship.

Tolerance to high levels of salinity