Ask Question
29 May, 02:26

Prior to their phaseout in the 1980s, chemicals containing lead were commonly added to gasoline as anti‑knocking agents. A 6.897g sample of one such additive containing only lead, carbon, and hydrogen was burned in an oxygen‑rich environment. The products of the combustion were 7.5 g CO2 (g) and 3.841 g H2O (g).

Determine the empirical formula of the gasoline additive.

+2
Answers (1)
  1. 29 May, 04:23
    0
    Empirical formula is C8H20Pb

    Explanation:

    Mass of C = molar mass of C/molar mass of CO2 x mass of CO2

    = 12.01/44.01 x 5.027

    = 1.372 g

    Mass of H = 2 x molar mass of H/molar mass of H2O x mass of H2O

    = 2 x 1.008/18.02 x 2.572

    = 0.288 g

    Mass of Pb = mass of sample - mass of C - mass of H

    = 4.617 - 1.372 - 0.288

    = 2.957 g

    Since moles = mass/molar mass

    Moles of C : H : Pb = 1.372/12.01 : 0.288/1.008 : 2.957/207.21

    = 0.1142 : 0.2857 : 0.01427

    = 8 : 20 : 1

    Empirical formula is C8H20Pb
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Prior to their phaseout in the 1980s, chemicals containing lead were commonly added to gasoline as anti‑knocking agents. A 6.897g sample of ...” 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