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  1. A

    Memorize periodic table

    USE FLASH CARDS!!!! :rofl:
  2. A

    Emperical/Molecular Formula

    To find the empirical formula of some molecule, you would need the percent composition (by mass) of the elements that make up that molecule. To figure out the molecular formula, you would need all that plus the molar mass of the sample. In you case this cant be done because a nickel or dime are...