Temperature and pressure can change the solubility of a solute.
Even though the object is weightless, it would need inertia, I.e, you pushing it or any form of transportation. So you would still have to push that 500kg to just keep it moving in space. Say if it were a planet with less gravitational force, it would be weightless.
Electrostatic (it’s a combined word) that’s all what i know honestly, hope it helps:)
