The ratio of the mass of C-12 atom to that of an atom of element X (whose atomicity…

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

The ratio of the mass of C-12 atom to that of an atom of element X (whose atomicity is four) is 1 : 9. The molecular mass of element X is (1)

480\,\text{g mol}^{-1}

(2)

432\,\text{g mol}^{-1}

(3)

36\,\text{g mol}^{-1}

(4)

84\,\text{g mol}^{-1}