Chemistrymedium · Past Paper
What is the percentage of carbon in a molecule of CO2?
A12%
B27.3%
C44%
D75%
✓ Correct Answer: B — 27.3%
Molar mass of CO2 = 12 + 2(16) = 44. Carbon contribution = 12. Percentage = (12/44) * 100 = 27.27%.
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