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Calculate the Molecular formula unit mass of ZnO , given atomic masses ofZn = 654 and O = 164

Answer»

Solution :Formula UNIT mass of Zno=Atomic mass of ZN + Atomic mass of `0=65+ 16 = 81`
Formula unit mass of `Na_(2) O=2x`Atomic mass of Na+ Atomic mass of O
`2 x 23 +16=62 u.`
Formula unit mass of `K_(2) CO_(3),=-2x` Atomic mass of K + Atomic mass of C+3 x Atomic mass of `0 = 2x39 + 12+ 2x 16=78 +12 +32 = 122 u.`


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