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%.
Share this question
More from Chemistry
- Which of the following is the correct structural formula for Ethanoic acid?
- Which isotope of carbon is used in radiocarbon dating to determine the age of fossils?
- Which catalyst is used in the manufacturing of methanol from water gas?
- Which allotrope of carbon is used as a lubricant and in pencil leads?
- Which element has the lowest atomic number among the halogens?