Why do tortoises grow to such huge sizes on isolated islands but no where else

Explanation:

Giant tortoises may have been better island colonizers because they can tolerate water and food shortages during an oceanic dispersal for a longer period than smaller species. Giant tortoises have been reported to survive 740 km of floating in the ocean," says Dr. Márton Rabi.

i don't know people like to fight everywhere rip.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)