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26 November, 09:46

1. Determine the empirical formula of a compound

containing 59.0% Na and 41.0% O by mass.

(a) NaO

(b) Na2O

(c) NaO2

(d) Na2O3

(e) none of these

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Answers (1)
  1. 26 November, 09:56
    0
    NaO

    Explanation:

    Empirical formula:

    It is the simplest formula gives the ratio of atoms of different elements in small whole number.

    Given dа ta:

    Percentage of sodium = 59.0%

    Percentage of oxygen = 41%

    Empirical formula = ?

    Solution:

    Number of gram atoms of Na = 59.0 / 23 = 2.6

    Number of gram atoms of O = 41 / 16 = 2.6

    Atomic ratio:

    Na : O

    2.6/2.6 : 2.6/2.6

    1 : 1

    Na : O = 1:1

    Empirical formula is NaO.
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