3 examples of osmosis in animals​

The movement of water into the cytoplasm in unicellular organism such as paramecium and Amoeba.

Re-absorption of water in the kidney tubules of mammals.

Explanation:

example of osmosis in animals is the shrinking of slugs on exposure to salt. The skin of slugs is a semi-permeable membrane that on exposure to salt, draws out water from the cells resulting in the shrinking of the cell and, in turn, the animal. hope this helps you.

We determine the percent by mass of water in the compound by dividing the mass of  water by the total mass. The total mass of Na2SO4.10H2O is equal to 322 g. The mass of water is 180 g. 
       
                    percent by mass of water = (180 / 322)*(100 %) = 55.9%