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Answer : 2 138 Explanation : Answer: B) 138 Explanation: The gram formula mass of a compound is nothing but the molar mass.The molar mass of K2CO3 (Potassium Carbonate) is given byAtomic weights of individual elements are K (Potassium) = 39 gC (Carbon) = 12 gO (Oxygen) = 16 g Hence, that of K2CO3 = 39(2) 12 16(3)= 78 12 48= 138.

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