Question

Quais são as fórmulas das bases formadas pelos respectivos cátions Al3+,
Cu2+, Be2+, Fr+ e Mn4+?
a) Al3OH, Cu2OH, Be2OH, CsOH, Mn4OH.
b) Al2(OH)3, Cu(OH)2, Be(OH)2, CsOH, Mn(OH)4.
c) Al(OH)3, Cu (OH)2, Be(OH)2, Cs(OH)2, Mn(OH)4.
d) AlOH, CuOH, BeOH,CsOH, FrOH.
e) Al(OH)3, Cu(OH)2, Be(OH)2, CsOH, Mn(OH)4.

Answer 1

reposta certa e)
Por causa do regra que troca o "expoente" de um pelo outro X-2Y+3 = X3Y2