A long-chain alkane found in crude oil is hexadecane, C16H34\text{C}_{16}\text{H}_{34}C16H34.
Complete the equation for the catalytic cracking of one molecule of C16H34\text{C}_{16}\text{H}_{34}C16H34 to form two molecules of propene (C3H6\text{C}_3\text{H}_6C3H6) and one molecule of another hydrocarbon, YYY.
C16H34→2C3H6+... \text{C}_{16}\text{H}_{34} \rightarrow 2\text{C}_3\text{H}_6 + \text{...} C16H34→2C3H6+...Explain whether hydrocarbon YYY is saturated or unsaturated.
An organic impurity found in some crude oil supplies has a relative molecular mass (MrM_rMr) of 888888. It contains carbon, hydrogen, and oxygen atoms in a 2:4:12:4:12:4:1 ratio. Determine the molecular formula of this impurity. [Relative atomic masses: H=1\text{H} = 1H=1, C=12\text{C} = 12C=12, O=16\text{O} = 16O=16]
