Question Detail

CHM 101 CHM 101 Past Questions Objective Question

Question

From the equation 2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O, how many moles of CO₂ are produced from 2.0 x 10¹⁰ mol of C₈H₁₈?
Options
A 8.0 x 10⁹
B 1.6 x 10¹⁰
Correct Answer
C 2.5 x 10¹⁰
D 3.2 x 10¹⁰
Correct Answer

Option B is the correct answer.

Detailed Explanation

From the balanced equation, the mole ratio of C₈H₁₈ to CO₂ is 2:16, which simplifies to 1:8. Therefore, moles CO₂ = 2.0 x 10¹⁰ mol C₈H₁₈ × (16/2) = 2.0 x 10¹⁰ × 8 = 1.6 x 10¹⁰ mol.

Hint

Use the coefficient ratio from the balanced equation to find the relationship between C₈H₁₈ and CO₂.

Question Info