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.
I have to pee a lot.. Frequent urination is another common complaint of the first trimester. It partly has to do with anatomy: As your uterus grows during early pregnancy, it puts more pressure on your bladder, making you feel like you have to pee more often.