Question

доля элемента в веществе

Answer 1

W(O/H2O)=16/18*100%=88.89%
W(S/SO2)=32/64*100%=50%
W(K/K2S)=78/110*100%=70.91%
W(Al/Al(OH)3)=27/78*100%=34.62%
W(H/H2S)=2/34*100%=5.88%
W(H/H2O2)=2/34*100%=5.88%
W(S/SO3)=32/80*100%=40%
W(Al2(SO4)3)=54/342*100%=15.79%

Answer 2

спасииибоо огромное