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"Dear student The molecular masses are: H2&rArr; 1 &times; 2 &rarr; 2u O2&rArr; 16 &times; 2 &rarr; 32u Cl2&rArr; 35.5 &times; 2 &rarr; 71 u CO2&rArr; 1 &times; 12 + 2 &times; 16 = 12 +32 = 44 u CH4&rArr; 1 &times; 12 + 4 &times; 1 = 16 u C2H6 &rArr;n2&times; 12 + 6 &times; 1 = 30 u C2H4&rArr; (2 &times; 12) + (4 &times; 1) = 28 u NH3&rArr; (1 &times; 14) + (3 &times; 1) = 17 u CH3OH &rArr; 12 + (3 &times; 1) + 16 + 1 = 32 u Thanks"
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