Question

Which of the following organic compounds has the highest molar mass? C5H11NO3 C7H11NO C9H18 C4H8N2O4

Answer 1

molar mass of C = 12.0107 gm/mole, molar mass of H = 1.008 gm/mole

molar mass of N = 14.0067 gm/mole , molar mass of O = 15.999 gm/mole

now calculate molar mass of given compound

C₅H₁₁NO₃ = (5 X 12.0107) + (11 X 1.008) + (1 X 14.0067) + (3 X 15.999) = 133.1452 gm/mole

C₇H₁₁NO = (7 X 12.0107) + (11 X 1.008) + (1 X 14.0067) + (1 X 15.999) = 125.1686 gm/mole

C₉H₁₈ = (9 X 12.0107) + (18 X 1.008) = 126.2403 gm/mole

C₄H₈N₂O₄ = (4 X 12.0107) + (8 X 1.008) + (2 X 14.0067) + (4 X 15.999) = 148.1162 gm/mole

therefore compound C₄H₈N₂O₄ have highest molar mass