Why is the mass of a carbon atom written as 12.011 amu on the periodic table? Why can’t the average atomic mass be a simple average (add masses and divide by 3) of the three naturally occurring isotopes: carbon-12, carbon-13 and carbon-14?

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.