Question

Why is it incorrect to write a chemical formula for petrol?

Answer 1

Petroleum

• The four types of fossil fuels are petroleum, coal, natural gas, and Orimulsion.
• Crude oil and petroleum fossil fuels are hydrocarbon mixes derived from animal and plant remnants.
• Petroleum is short for "rock oil" or "earth oil."
• Petroleum products are fuels manufactured from crude oil and natural gas hydrocarbons.
• Coal, natural gas, and biomass may all be used to make petroleum products.

Chemical formula of petrol

• Petrol is made up of hydrocarbons with $4$ to $12$ carbon atoms per molecule $({\mathrm{C}}_4-{\mathrm{C}}_{12})$.
• ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}+2}$ is the conventional chemical formula for petrol.
• This formula refers to alkanes, and the chemical formula for petrol can change depending on which gases are present.
• Thus, it is incorrect to write a chemical formula for petrol.