1. Silk is mainly protein.
2. Candles are usually made of paraffin. The composition of wax oil is still paraffin. Paraffin wax is obtained from the waxy fraction of petroleum through cold pressing or solvent dewaxing. Paraffin is a mixture of several higher alkanes, mainly n-docosane (C22H46) and n-octadecane (C28H58), containing about 85% carbon elements and about 14% hydrogen elements.