What is the molecular formula of ethane?

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Prepare for the IGCSE Organic Chemistry Exam. Study with flashcards and multiple choice questions, each question has hints and explanations to ensure you understand the core concepts. Get ready for your test with confidence!

Multiple Choice

What is the molecular formula of ethane?

Explanation:
Ethane is part of the alkane series, which follow the formula CnH2n+2. With two carbons (n = 2), the molecule contains two carbon atoms and six hydrogens, giving the molecular formula C2H6. The notation CH3-CH3 shows how the atoms are bonded in ethane, but it’s a structural representation, not the molecular formula. The other options point to a different hydrocarbon (C3H8 is propane) or a different molecule entirely (CH4 is methane), or simply depict the bonding rather than the formula.

Ethane is part of the alkane series, which follow the formula CnH2n+2. With two carbons (n = 2), the molecule contains two carbon atoms and six hydrogens, giving the molecular formula C2H6. The notation CH3-CH3 shows how the atoms are bonded in ethane, but it’s a structural representation, not the molecular formula. The other options point to a different hydrocarbon (C3H8 is propane) or a different molecule entirely (CH4 is methane), or simply depict the bonding rather than the formula.

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