Describe why strontium chloride melts at a very high temperature of 1477°c

Well, Strontium chloride is an ionic compound which are bonded together by very steong electrostatic forces of attraction and huge amount of energy is required to break the bond between them. Hence, strontium chloride melts at a very high temperaturw.

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.