Calculate the formula unit masses of ZnO, Na2O, K2CO3, given atomic masses of Zn = 65 u, Na = 23 u, K = 39 u, C = 12 u, and O = 16 u.

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Formula unit mass of ZnO = Atomic mass of Zn + Atomic mass of O = 65 + 16 = 81 u Formula unit mass of Na2O = 2 × Atomic mass of Na + Atomic mass of O = 2 × 23 + 16 = 62 u Formula unit mass of K2CO3 = 2 × Atomic mass of K + Atomic mass of C + 3 × Atomic mass of O = 2 × 39...
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Formula unit mass of ZnO = Atomic mass of Zn + Atomic mass of O = 65 + 16 = 81 u Formula unit mass of Na2O = 2×Atomic mass of Na + Atomic mass of O = 2×23 + 16 = 62 u Formula unit mass of K2CO3= 2×Atomic mass of K + Atomic mass of C + 3×Atomic mass of O = 2×39 + 12 + 3×16 = 138 u read less
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The size of an atom is so small that it is not possible to see it with bare eyes. Also, the atom of an element does not exist independently.
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