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: Drugs, or controlled substances of any kind including alcohol and cigarrettes, are NOT recommended in pregnancy at any gestational age. Drug that are consumed at ANY month in pregnancy can cause severe and irreversible organ damage in the developing fetus, the most critical organ being the brain.