The molecular formula for pentane is which of the following?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $9.99Unlock all

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

The molecular formula for pentane is which of the following?

Explanation:
Alkanes have a simple pattern for their molecular formula: CnH2n+2. Pentane is an alkane with five carbon atoms, so substituting n = 5 gives H = 2(5) + 2 = 12, yielding C5H12. The other formulas correspond to hydrocarbons with fewer carbon atoms—CH4 is methane (1 carbon), C2H6 is ethane (2 carbons), and C3H8 is propane (3 carbons). Therefore, the pentane formula is C5H12.

Alkanes have a simple pattern for their molecular formula: CnH2n+2. Pentane is an alkane with five carbon atoms, so substituting n = 5 gives H = 2(5) + 2 = 12, yielding C5H12. The other formulas correspond to hydrocarbons with fewer carbon atoms—CH4 is methane (1 carbon), C2H6 is ethane (2 carbons), and C3H8 is propane (3 carbons). Therefore, the pentane formula is C5H12.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy