The first power is ductility . Ductility is a physical property.Golden girl can be stretched into extremely thin shapes due to her ductility which can come in handy to hide and get to places villains can't.
(This looks kind of stupid, but I could not explain it on Storyboard to make it like I imagine her power. When I say that she can stretch into any shape I think of her power being the same as Elastic Girl from The Incredibles)
The second power is malleability. Malleability is a physical property.Golden girl can bend and shape herself in anyway or any shape she needs or wants to help her during a fight when necessary.
The weakness is solubility. Solubility is a physical property.If Golden Girl is comes in reach of the mixture Aqua Regia, she will react and be dissolved. She cannot be turned into her solid form until she is showered with a reducing chemical to turn her back into a solid.
This is dangerous for Golden Girl because her enemies can take advantage of her since she cannot move. They could kidnap her or do anything with her that they want.