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15 Graphs you must know for apes exam. Nitrogen -- N 2 -- 78.084% Oxygen -- O 2 -- 20.9476% Argon -- Ar -- 0.934% Carbon Dioxide -- CO 2 -- 0.0314% Neon -- Ne -- 0.001818% Methane -- CH 4 -- 0.0002% Helium -- He -- 0.000524% Krypton -- Kr -- 0.000114%
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Nitrogen -- N2 -- 78.084% Oxygen -- O2 -- 20.9476% Argon -- Ar -- 0.934% Carbon Dioxide -- CO2 -- 0.0314% Neon -- Ne -- 0.001818% Methane -- CH4 -- 0.0002% Helium -- He -- 0.000524% Krypton -- Kr -- 0.000114% Hydrogen -- H2 -- 0.00005% Xenon -- Xe -- 0.0000087% Ozone -- O3 -- 0.000007% Nitrogen Dioxide -- NO2 -- 0.000002% Iodine -- I2 -- 0.000001% Carbon Monoxide -- CO -- trace Ammonia -- NH3 -- trace