Mr(CaCO3) = 1 × 40 + 1 × 12 + 3 × 16 = 100
Mr(CO2) = 1 × 12 + 2 × 16 =44
Mr(Zn(OH)2) = 1 × 65 + 2 × 16 + 2 × 1 = 99
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Mr(CaCO3) = 1 × 40 + 1 × 12 + 3 × 16 = 100
Mr(CO2) = 1 × 12 + 2 × 16 =44
Mr(Zn(OH)2) = 1 × 65 + 2 × 16 + 2 × 1 = 99