The correct answer is C. C4H10.
Butane is a hydrocarbon with the chemical formula C4H10. It is a colorless, odorless gas that is found in natural gas and petroleum. Butane is used as a fuel in lighters, camping stoves, and other portable appliances. It is also used as a refrigerant and in the production of plastics.
Option A, C2H6, is the molecular formula of ethane. Ethane is a colorless, odorless gas that is found in natural gas and petroleum. Ethane is used as a fuel in internal combustion engines and as a feedstock for the production of ethylene.
Option B, C3H8, is the molecular formula of propane. Propane is a colorless, odorless gas that is found in natural gas and petroleum. Propane is used as a fuel in internal combustion engines, as a refrigerant, and in the production of propylene.
Option D, C5H12, is the molecular formula of pentane. Pentane is a colorless, odorless liquid that is found in natural gas and petroleum. Pentane is used as a fuel in internal combustion engines, as a solvent, and in the production of gasoline.