Capillaries are the smallest and most fragile of the body's blood vessels. They are responsible for what is known as microcirculation, meaning that they create a circulatory network within the organs of the body. There are three different types found in the human body: continuous, fenestrated, and sinusoidal.
1 Find the empirical formula. 2  Get the mass of each element by assuming a certain overall mass for the sample (100 g is a good mass to assume when working with percentages). 3  Convert the mass of each element to moles.  Find the ratio of the moles of each element.
4. Method of calculating the % percentage by mass of the elements in a compounds. The 'percent' % by mass composition of a compound in terms of its constituent elements is calculated in three easy steps. Chemistry calculations 4.. Method of calculating the % percentage by mass of the elements in a compounds. The 'percent' % by mass composition of a compound in terms of its constituent elements is calculated in three easy steps. Chemistry calculations 4.