giai thich

T

thutuanprocute

oleum u??????

cong thuc oleum:
H2SO4.nSO3
cac phan ung hoa hoc:
H2SO4.nSO3+nH2O---->(n+1)H2SO4
:khi (165)::khi (197)::khi (197)::khi (154)::M_nhoc2_09:
 
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