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Unformatted text preview: H2O 2(1.00) + 15.999 = 18.0153 the one that contains the smallest molar mass, contains largest number of molecules (when comparing the same mass of different compounds) molecular formula: the number of each atom it contains per molecule Mass percent: the percentage by mass (mass %) of it elements Mass % = mass of element in 1 mol compound/molar mass of compound x 100...
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- Fall '04