November 2019 2 45 Report
5 - Das alternativas abaixo, assinale a que apresenta APENAS substâncias simples.

a) HCl; O2; N2; HNO3.

b) H2O; NH3; NaCl; He.

c) He; N2; Cl2; F2.

d) CH3COOH; H2SO4; H3PO4; NaOH.

e) O2; H2; Br2; NO2.
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