they can, but it may not be effective.
it has no effect. density of a substance is the same no matter the size or shape of the sample.
A mysterious effect
it is a substance
It depends on the substance :)
neutral substance or salts
Phase change doesn't effect the mass of substance. However, it cause drastic change of density and the weight of substance may change due to buoyancy force.
It can be observed without changing the identity of the object.
by vasoconstriction and opening of the airway
Heart opening
Pressure
No
returning condensate is rich in high boiling point allowing lower boiling point substance to distill over.