allergy
No, a new substance is normally formed
proteins
allergy
allergy
Plutonium.
Normally iodine.
Vapour
I am not familiar with the term Abnormal Movement Disorder. Perhaps you are referring to Tourettes Syndrom. Tourettes is a neurological disorder that normally appears in childhood. It involves involuntary movements of the limbs, and may also involve involuntary noises and sounds made by the person. I do not think there is any cure for it, and symptoms are normally mild.
For most purposes, the molar mass of any particular substance remains the same. However to be precise I will note that there are isotopic variations which can affect molar mass. In other words, it is normally expected that a given substance will have a certain mixture of isotopes giving a certain mass, but a substance obtained from one source might have a different isotope ratio than the same substance obtained from a different source.
Granite counter tops aare not sensitive to the heat normally associated with their use in kitchens. A hot pan will not affect them.
Besides anxiety disorders and phobias many psychiatric disorders have anxiety as one of its features. Example: Depressive disorder.
Vapour