The astronaut then measures the abundance of strontium on the new planet, obtaining the following results:
isotope abundance
(%) mass
(amu)
86sr 9.46 85.91
87sr
7.00 86.91
88sr 83.54 87.91
what is the atomic mass of strontium for this planet?

Atomic mass is equal to the average number allowing for the relative abundances of different isotopes. It is calculated by:

Atomic mass = ΣzₓAₓ 

where zₓ is the relative abundance of the isotope and Aₓ is the atomic mass of the isotope.

Atomic mass = (0.0946x85.91) + (0.07x86.91) + (0.8354x87.91) = 87.6508 amu

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.