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Atoms And Molecules
Question
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Calculate the molecular masses of H2, O2, Cl2, CO2, CH4, CH6, C2H4, NH3, CH3 OH.

Answer

Mass of hydrogen =1 u
Molecular mass of  H2 = 1+1 =2 u

Mass of oxygen=16u
Molecular mass of O2 = 16+16 = 32 u

Mass of Chlorine=35.5u
Molecular mass of Cl2 = 35.5 + 35.5 = 71 u

Mass of carbon =12u
Mass of oxygen=16u
Molecular mass of CO2 = 12 +32 = 44 u

Mass of carbon = 12u
Mass of hydrogen=1u
Molecular mass of C2H6 = 12 X 2 + 1 X6 = 30 u

Mass of carbon = 12u
Mass of hydrogen=1u
Molecular mass of C2H4 = 12 X 2 + 1 X 4 = 28 u

Mass of hydrogen=1u
Mass of carbon =12u
Molecular mass of NH3  = 1 X 14 + 1 X 3 = 17 u

Mass of carbon = 12u
Mass of hydrogen=1u
Mass of oxygen=16u
Molecular mass of CH3OH = 1 X 12 + 1 X 3 + 1 X 16 +1 X 1 = 32 u

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