What is the molecular formula of ethane?

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Study for the IGCSE Organic Chemistry Test. Engage with flashcards and multiple-choice questions, complete with hints and detailed explanations. Prepare effectively to excel in your exam!

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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