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4 August, 23:44

A sample of nitrogen containing 3.0*10^23 molecules has the same number of molecules as a sample containing

A. 025 mole of 02

B. 2.0 moles of He

C. 1.0 mile of H2

D. 0.50 mole of Ne

Which one?

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Answers (1)
  1. 5 August, 03:18
    0
    D) 0.50 mole of Ne

    Explanation:

    Given dа ta:

    Number of molecules of nitrogen = 3.0*10²³ molecules

    Which sample contain same number of molecules as nitrogen=?

    Solution:

    A) 0.25 mole of O₂

    1 mole = 6.022*10²³ molecules

    0.25 mol * 6.022*10²³ molecules / 1 mol

    1.51*10²³ molecules

    B) 2.0 moles of He.

    1 mole = 6.022*10²³ molecules

    2.0 mol * 6.022*10²³ molecules / 1 mol

    12.044*10²³ molecules

    C) 1.0 moles of H₂

    1 mole = 6.022*10²³ molecules

    D) 0.50 mole of Ne

    1 mole = 6.022*10²³ molecules

    0.50 mol * 6.022*10²³ molecules / 1 mol

    3.0*10²³ molecules
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