Formula unit mass of $C a C O_{3}$ is:

104 u

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106 u

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100 u

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1144 u

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Solution

The correct option is C $100 u$
Formula unit mass of $C a C O_{3} = Atomic mass of Ca + Atomic mass of C + (Atomic mass of O \times 3)$
$= 40 u + 12 u + (16 u \times 3)$
$= 100 u$

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