Forums Assignment Help find the formula of the compounds

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  • #129
    Aakanksha
    Participant

    Use the following information to answer the next question.

    A compound is formed by two elements X and Y. The atoms of element X form hcp lattice and those of element Y occupy 1/3 of the tetrahedral voids.

    The formula of the given compound formed is

    A : XY

    B : XY2

    C : X2Y

    D : X3Y2

    #8695
    ahwriter
    Participant

    solution

    It is known that the number of tetrahedral voids formed is equal to twice the number of atoms of element X.

    Given that,

    Only 1/3 of the tetrahedral voids are occupied by the atoms of element Y.

    Therefore, ratio of the number of atoms of X and Y = 1 : 2 × 1/3

    = 3 : 2

    Hence, the formula of the compound formed is X3Y2.

    The correct answer is D.

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