Mr(Cl₂) = 2×Ar(Cl) = 2×35,5 = 71.
Mr(O₃) = 3×Ar(O) = 3×16 = 48.
Mr(H₂S) = 2×Ar(H) + Ar(S) = 2×1 + 32 = 2 + 32 = 34.
Mr(CO) = Ar(C) + Ar(O) = 12 + 16 = 28.
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Mr(Cl₂) = 2×Ar(Cl) = 2×35,5 = 71.
Mr(O₃) = 3×Ar(O) = 3×16 = 48.
Mr(H₂S) = 2×Ar(H) + Ar(S) = 2×1 + 32 = 2 + 32 = 34.
Mr(CO) = Ar(C) + Ar(O) = 12 + 16 = 28.