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Answer : 1 63 g/mol Explanation : Answer: A) 63 g/mol Explanation: Calculation of molar mass of HNO3:Atomic masses of H, N, O are 1, 14, 16 respectivelyNow the molar mass of HNO3 isHNO3 = 1X1 1X14 3X16= 1 14 48= 63 g/mol or amu.

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