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.
A mole is defined as the number of atoms in exactly 12 grams of C (carbon twelve). The number is called Avogadro's Number. In the above definition, 12 is the mass number of carbon.So, one mole of carbon atoms has a mass of 12 grams. The relative atomic mass, which can be written as Ar or RAM, is the number just above the element in the periodic table (have a look, and check that carbon is 12). mole is defined as the number of atoms in exactly 12 grams of C (carbon twelve). The number is called Avogadro's Number. In the above definition, 12 is the mass number of carbon.