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प्रश्न
Calculate the relative molecular mass of ZnCO3.
[Zn = 65, O = 16, C = 12]
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उत्तर
Relative molecular mass of ZnCO3
= Zn + C + 3[O]
= 65 + 12 + 3[16]
= 77 + 48
= 125
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