CH4 = 74.98%
the mass percent of carbon in each compound:
CH₄: (12.01 g C / 16.05 g CH₄) x 100% ≈ 74.98%
CO: (12.01 g C / 28.01 g CO) x 100% ≈ 42.85%
H₂CO₂: (12.01 g C / 46.03 g H₂CO₂) x 100% ≈ 26.09%
H₂CO: (12.01 g C / 30.03 g H₂CO) x 100% ≈ 39.97%
make sure to compare the mass percent of carbon in each compound:
CH₄ has the highest mass percent of carbon, approximately 74.98%.
hope this helps ^^
