Blood returning from the body enters the heart through the __

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

According to the diagram, what sources contribute to the phosphorus found in soil? according to the diagram, phosphorus found in soil contributes phosphorus to what other sources?

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false