Answer:
The molecular formula is C₄H₁₀.
You can also express it as: CH₃ - CH₂ - CH₂ - CH₃.
Step-by-step explanation:
Butane is an alkane with four carbon atoms. The general formula for alkanes is CnH2n+2, where n is the number of carbon atoms. For butane, n = 4. So, the molecular formula for butane is C4H(2×4)+2 = C4H10.