The correct option is A 27.27 %
Determining the mass of carbon in CO2
Chemical formula of carbon dioxide = CO2
Molar mass of CO2 = 44 g mol−1
Molar mass of carbon = 12 g mol−1
Thus, 12 g of carbon atoms are present in 44 g of CO2.
Mass percentage of carbon in CO2
Mass percentage =Mass of carbonMass of carbon dioxide×100
=1244×100
= 27.27 %
Thus, mass percentage of carbon in carbon dioxide is 27.27 %.