Question

The mass of Carbon is 12 g/mol and the mass of oxygen is 16 g/mol. What is the approximate percent composition by mass of CO2 (formula mass = 44)?
20% carbon and 80% oxygen
23% carbon and 77% oxygen
25% carbon and 75% oxygen
27% carbon and 73% oxygen

Answer 1

Answer:

the last one

27% by 73%

Explanation:

12/44*100 for C

and

16/44*100 for O