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35. 1
36. 4
37. 1
2NaOH+SO2=Na2SO3+H2O
38. w=32/M(SO3)=32/80=0.4
3
дано
W(C) = 8.46%
W(H) = 2.13%
W(J) = 89.41%
-----------------------
CxHyJz-?
CxHyJz = 8.46 / 12 : 2.13 / 1 : 89.41 / 127
CxHyOz = 0.705 : 2.13 : 0.704 = 1 : 3 :1
CH3J
ответ йодметил
Br2O7+H2O=2HBrO4
2Mg+O2=2MgO
Na2S+Pb(NO3)2=2NaNO3+PbS
Так и остаётся
Аналогично
2AgBr=2Ag+Br2