Chemistry

Question Analysis
This question involves calculating the percent composition of carbon in carbon dioxide.
The main focus is on applying the percent composition formula to a simple binary compound.

Key Concept Explanation
Percent composition of an element = (mass of the element in 1 mole of compound / molar mass of compound) × 100%

Step-by-Step Solution
1. Mass of C in CO₂ = 12.01 g/mol
2. Molar mass of CO₂ = 44.01 g/mol
3. % C = (12.01 / 44.01) × 100% ≈ 27.3%

...