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Answer : 2 18 gms Explanation : Answer: B) 18 gms Explanation: The molar mass of H2O can be calculated as the following.M(H2O)= [2 x M(H)] [M(O)].And we know that M(H) = 1g/mol, M(O) = 16g/mol.So, M(H2O)= 2x1 16 = 18g/mol, That means 1 mole of H2O contains 18g. Hence, one mole of H2O corresponds to 18 grams.

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