Neco 2021 Chemistry Question 11

Practice objective / multiple choice question 11 from the 2021 Neco Chemistry examination.

Neco 2021 Chemistry Objective / Multiple Choice Medium Difficulty
Question 11 NECO • 2021 • CHEMISTRY • objective

A 2.00 g mixture of the two isomers of pentane, n‑pentane and isopentane, is completely combusted in excess oxygen. The heat of combustion is 48.0 kJ\,g\(^{-1}\) for n‑pentane and 46.0 kJ\,g\(^{-1}\) for isopentane. The total heat released is 93.0 kJ. Determine the mass of each isomer present in the mixture.

Answer Options

Correct Answer A. 0.50 g of n‑pentane and 1.50 g of isopentane
B. 0.75 g of n‑pentane and 1.25 g of isopentane
C. 0.30 g of n‑pentane and 1.70 g of isopentane
D. 1.00 g of n‑pentane and 1.00 g of isopentane
Correct Answer
A
Correct Option:
0.50 g of n‑pentane and 1.50 g of isopentane

About This Question

This is Neco 2021 Chemistry Question 11. It is one of the objective questions from the 2021 Neco Chemistry examination.

Difficulty level: Medium .

View More Neco 2021 Chemistry Questions More Neco Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support