In order to grasp the concept of molar mass calculations it is important to understand the molar unit. The mole also called mol is the basic unit of measurement in chemistry. By definition, in modern chemistry, one mole represents the number of carbon atoms in exactly 12 grams of carbon 12 isotope.
Fetal development during the first trimester. The most dramatic changes and development for your baby occur during the first trimester. Itâs also during this time that the fetus is the most susceptible to damage from alcohol, drugs, certain medications, and illnesses.
A pattern of binge drinking is considered the most damaging (large amounts of alcohol consumed rapidly). In the first trimester of pregnancy, alcohol interferes with the organization of brain cells. Weeks 3-8 of fetal development are considered to be an especially critical period for brain damage from alcohol exposure.