Ask Question
12 August, 08:40

Determine the empirical and molecular formula:

Ibufuren, a headache remedy contains 75.6% C, 8.08% H, and 15.5% O by mass and has a molar mass about 206 g/mol.

+4
Answers (1)
  1. 12 August, 09:27
    0
    The empirical formula = molecular formula = C13H18O2

    Explanation:

    in 100% compound we have 75.6 % Carbon (Molar mass = 12g/mole), 8.80% hydrogen (Molar mass = 1.01 g/mole) and 15.5% Oxygen (Molar mass = 16.01 g/mole).

    Carbon: 75.6g / 12 = 6.29

    Hydrogen: 8.80 / 1 = 8.80

    Oxygen: 15.5 / 16 = 0.97

    ⇒0.97 is the smallest so we divide everything through by 0.97

    C: 6.29 / 0.97 = 6.48 ≈ 6.5

    H: 8.80 / 0.97 = 9

    O: 0.97 / 0.97 = 1

    To get rid of decimals, we multiply by 2

    C: 6.5 x 2 = 13

    H: 9 x 2 = 18

    O: 1 x 2 = 2

    The empirical formula = C13H18O2

    13x 12g/mol + 18x1g/mol + 2x 16g/mol = 156 + 18 + 32 = 206g/mol which is the molar mass of ibuprofen

    The empirical formula = molecular formula = C13H18O2
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Determine the empirical and molecular formula: Ibufuren, a headache remedy contains 75.6% C, 8.08% H, and 15.5% O by mass and has a molar ...” in 📘 Chemistry if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers