Кислород мифород китодот и лоробот
2)CH4+H2O=3H2+CO 4) 2HCl + Zn →ZnCl2+H2
5) 2H2O + 2Na →2NaOH+H2
Mr(<span>Ba(OH)2) = 137+2*16+2*1=171
W(Ba)=137/171 = 0.80=80%
W(O)=32/171=0.19=19%
W(H)=2/171=0.01=1%
Mr(</span><span>Al2(SO4)3)=2*27+3*32+12*16=311
W(Al)=54/311=0.17=17%
W(S)=64/311=0.21=21%
W(O)=196/311=0.62=62%
</span>