Fat blob

A covered soup bowl contains 1 L of a very diluted, cold soup (25 °C), 1 L of air, and a floating blob of fat of a volume of 1 mL. The system also contains 1 mg of naphthalene. Estimate the amount of naphthalene you would ingest if you were to eat only the fat blob. Assume that equilibrium is established. 

Hence, you would take up 0.7 mg of the lmg total naphthalene if only eating the fat blob, or you would take up only 0.3 mg when leaving the fat blob, and just eating the soup (the part in the air can more or less be neglected). 

Try this Pour a little whole milk into a cup and let it sit on the counter for three or four days. After several days, look carefully at the milk. Can you see small white blobs Milk might look like a pure substance, but to a chemist, it s not pure. It s a mixture. The white blobs you see are the fat particles that are separating from the rest of the milk mixture. Don t forget to throw out the milk afterwards ... 

Figure 13.1. Macroscopic and microscopic appearance of solid tumours, a A metastasis of an intestinal tumour in the liver. The tumour is the bright blob ins the center, showing irregular tissue organization, and yellowish fat deposits and cavities resulting from cell degeneration. The tumour grows invasively into the surroimding liver tissue, b Microscopic picture of a malignant epithelial (squamous cell) tumour. Note the very irregular size and shape of nuclei and of cells.

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