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25 October, 11:35

Determine the relative formula mass of hexasodium difluoride using the periodic table below. A. 138 g/mol B. 176 g/mol C. 20 g/mol D. 42 g/mol

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  1. 25 October, 11:51
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    Option B. 176g/mol

    Explanation:

    We'll begin by writing the chemical formula for hexasodium difluoride. This is given below:

    Hexasodium means 6 sodium atom

    Difluoride means 2 fluorine atom.

    Therefore, the formula for hexasodium difluoride is Na6F2.

    The relative formula mass of a compound is obtained by simply adding the atomic masses of the elements present in the compound.

    Thus, the relative formula mass of hexasodium difluoride, Na6F2 can be obtained as follow:

    Molar mass of Na = 23g/mol

    Molar mass of F = 19g/mol

    Relative formula mass Na6F2 = (23x6) + (19x2)

    = 138 + 38

    = 176g/mol

    Therefore, the relative formula mass of hexasodium difluoride, Na6F2 is 176g/mol
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