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Stoichiometry:the relationship between the relative quantities of…

- - - - the numbers in front of the formulas
  - - - Molecule
        
        CH4 = 16.05 g/mol
      - Formula units
        
        2NH3 = 2N + 3H2
        
        2N = 2(14.01) = 28.02 g/mol
        
        3H2 = 6(1.01) = 6.06 g/mol
        
        2NH3 = 34.08 g/mol
    - - H2 = 2(1.01) = 2.02 g/mol
      - The periodic table
    - - Significant figures are any non-zero digits or trapped zeros. When going between decimal and scientific notation, maintain the same number of significant figures.