Repeating decimals. 1  Converting a fraction to a repeating decimal. 2  Practice: Writing fractions as repeating decimals. 3  Converting repeating decimals to fractions (part 1 of 4  2) Practice: Converting repeating decimals to fractions 5  1. Converting repeating decimals to fractions (part 2 of  2)
hydatid mole , hydatidiform mole an abnormal pregnancy characterized by placental abnormality involving swollen chorionic villi, which form a large, grapelike mass of vesicles, by trophoblastic hyperplasia, and by loss of fetal blood vessels in the villi.
The mole is currently defined as the quantity of entities (elementary particles like atoms or molecules) equal to the number of atoms in 12 grams of carbonâ12. Thus, the current definition of the mole requires that 1000â12 (83â) moles of 12 C has a mass of precisely one kilogram.