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Atoms and Molecules
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12/11/2021 3:53 pm
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Calculate the molecular masses of the following:
(a) Hydrogen, H2
(b) Oxygen, O2
(c) Chlorine, Cl
(d) Ammonia, NH3
(e) Carbon dioxide, CO2
(Atomic masses: C = 12u; H = 1u; O = 16u; Cl = 35.5u; N = 14u)
1 Answer
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12/11/2021 3:56 pm
(a) Molecular mass of Hydrogen (H2) = 2 x H = 2 x 1 u = 2 u
(b) Molecular mass of oxygen (O2) = 2 x O = 2 x 16 u = 32 u
(c) Molecular mass of chlorine (Cl2) = 2 x Cl = 2 x 35.5 = 71 u
(d) Molecular mass of Ammonia (NH3) = 1 x N + 3 x H = 14 + 3 = 17 u
(e) Molecular mass of carbon dioxide (CO2) = 1 x C + 2 x O = 12 + 32 = 44 u