What is the chemical formula for propane?

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Multiple Choice

What is the chemical formula for propane?

Explanation:
Propane is a three-carbon alkane, which means it has only single bonds between carbon atoms. Alkanes follow the formula CnH2n+2, so with three carbons (n = 3) you get C3H8. That is propane's formula. The other options fit different hydrocarbons: C3H6 is propene (has a double bond), CH4 is methane (one carbon), and C2H6 is ethane (two carbons). Propane’s three-carbon chain saturated with hydrogens gives eight hydrogens, matching C3H8.

Propane is a three-carbon alkane, which means it has only single bonds between carbon atoms. Alkanes follow the formula CnH2n+2, so with three carbons (n = 3) you get C3H8. That is propane's formula. The other options fit different hydrocarbons: C3H6 is propene (has a double bond), CH4 is methane (one carbon), and C2H6 is ethane (two carbons). Propane’s three-carbon chain saturated with hydrogens gives eight hydrogens, matching C3H8.

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