HomeLearn Fast select Course
Show Unit/ChapterChange UnitChange SubjectLast Menu
NEET-XI-Chemistry

01: Some Basic Concepts of Chemistry

 page 2
Qstn# 10 Prvs-QstnNext-Qstn
  • #10
    In three moles of ethane (C2H6), calculate the following:
    () Number of moles of carbon atoms.
    () Number of moles of hydrogen atoms.
    () Number of molecules of ethane.
    Ans : null () 1 mole of C2H6 contains 2 moles of carbon atoms.

    ∴ Number of moles of carbon atoms in 3 moles of C2H6

    = 2 × 3 = 6
    () 1 mole of C2H6 contains 6 moles of hydrogen atoms.

    ∴ Number of moles of carbon atoms in 3 moles of C2H6

    = 3 × 6 = 18
    () 1 mole of C2H6 contains 6.023 × 1023 molecules of ethane.

    ∴ Number of molecules in 3 moles of C2H6

    = 3 × 6.023 × 1023 = 18.069 × 1023


    Page No 23:
  • #10-i
    Number of moles of carbon atoms.
    Ans : 1 mole of C2H6 contains 2 moles of carbon atoms.

    ∴ Number of moles of carbon atoms in 3 moles of C2H6

    = 2 × 3 = 6
  • #10-ii
    Number of moles of hydrogen atoms.
    Ans : 1 mole of C2H6 contains 6 moles of hydrogen atoms.

    ∴ Number of moles of carbon atoms in 3 moles of C2H6

    = 3 × 6 = 18
  • #10-iii
    Number of molecules of ethane.
    Ans : 1 mole of C2H6 contains 6.023 × 1023 molecules of ethane.

    ∴ Number of molecules in 3 moles of C2H6

    = 3 × 6.023 × 1023 = 18.069 × 1023


    Page No 23: