Dentre as substancia a seguir formuladas ,a que possui massa molar igual a 80 g/mol é:
Dados: H= 1 u; C= 12 u; N = 14 u; O = 16 u; Na = 23 u; S = 32 u; Ca = 40 u.

a) Ca(OH)₂
b) SO₃
c) NaHSO₃
d)H₂SO₄
e)C₆H₆
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