What is the amount of chemistry in the chemical engineering course?

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Chemical engineering is the branch of engineering that deals with the application of physical science (e.g. chemistry and physics), with mathematics, to the process of converting raw materials or chemicals into more useful or valuable forms. In addition to producing useful materials, modern chemical engineering is also concerned with pioneering valuable new materials and techniques - such as nanotechnology, fuel cells and biomedical engineering. - Wikipedia

For most of engineering feilds physics and mathamatics is enough to master them. But chemical engineering requires aditional subjects chemistry and biology. Biology is when you are doing biochemical engineering but you will always found chemistry as a vital subject in every chemical engineering feilds specially when you are doing polymer engineering