The molecular formula of calcium oxide - CaO The molar mass of CaO - 40 + 16 = 56 g/mol Which means that 1 mol weighs 56 g Therefore 56 g of CaO is - 1 mol Then 89.23 g is equivalent to - 1/56 x 89.23 = 1.6 mol of CaO
Chemicals can enter and irritate the nose, air passages and lungs. They can become deposited in the airways or be absorbed by the lungs into the bloodstream. The blood can then carry these substances to the rest of the body. Ingestion (swallowing) of food, drink or other substances is another route of exposure.