<prompt> In the set mass of the ZOE impression paste, zinc eugenolate forms:MatrixCoreBaseNone of the above  <response>: The chelate zinc eugenolate forms a matrix surrounding a core of zinc oxide particles. The chelate is thought to form as an amorphous gel that tends to crystallize giving strength to the set mass. Formation of crystalline zinc eugenolate is greatly enhanced by zinc acetate dehydrate accelerator which is more soluble than ZnOH2 and can supply zinc ions more rapidly.Ref: BASIC DENTAL MATERIALS by JOHN J MANAPPALLIL ed 4 Pg 252 